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RayPals 5ab291a68c port: advance VC6 typeobject frontier and preserve regression coverage

2026-10-26 18:09:33 +00:00

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Publication preparation: complete patch and regression checks

Date: 2026-10-26 UTC. User explicitly authorized commit and push to the existing Gitea main. Fetched gitea/main; pre-publication divergence was 0 0. Reviewed the root publication unit: ignored cpython/ source is represented by the tracked compatibility patch; ignored MSVC600/ and build output remain local. The unrelated empty untracked tp_mro file is excluded.

Publication checks discovered the existing untracked cpython/Include/internal/pycore_win9x_loadlibrary.h, already referenced by patched source but absent from the previous generated patch. Regenerated the complete patch using an isolated temporary index containing all tracked nested modifications plus that reviewed new header; no changes to the real nested index. Verified byte equality with that isolated staged diff, checked and applied it against an isolated pristine upstream HEAD index, and verified the restored header bytes exactly. This supersedes the earlier tracked-only patch equality check; git diff alone cannot capture an untracked new header.

All 159 changed/new standalone Python regression scripts passed with their required source/header arguments (evidence: build/manual-20261026-type-add-method/publication-tests-correct-argv.json). An initial argument-free batch was invalid for scripts requiring positional paths and was rerun correctly; its invocation errors are not source regressions. Full shell harness remains blocked by the lifecycle scan guard as documented below. Final staging checks also report pre-existing trailing spaces inside three newly tracked source-order test fixtures (find-name-in-mro, get-subclasses-index, type-new-get-bases-winner), in addition to the generated patch's required single-space context markers; left fixture content unchanged and all 159 tests pass. Latest compile probe remains 108/109, blocked in typeobject.c(6231); no linked interpreter or target-runtime claim.

Manual continuation: descriptor registration and hash override C89 locals

Date: 2026-10-26 UTC. Workspace /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; CPython v3.11.16, HEAD 41388c9cb160d0886d5ca00d2e6c8782608a4549. Actual MSVC6 compiler exercised through Wine using the existing project probe. Preserved the existing dirty/untracked work; no reset, clean, stash, commit or push. Direct narrowly scoped edits, no parallel implementation lane.

Evidence directory: build/manual-20261026-type-add-method/. Baseline: 88 standalone typeobject regression scripts passed; forced-fresh probe exit 2, total=109 compiled=108 cached=0 skipped=0, first errors at typeobject.c(5789) (PyObject/name) and (5801) (err). before-probe.log preserves diagnostics; typeobject.before.c and before-hashes.json preserve pre-edit source evidence.

Three strict RED/GREEN slices, each followed by a real forced-fresh compiler probe:

type_add_method(): move only name and err declarations to the opening block. Existing branch assignments, creation calls and reference cleanup remain in place. New scripts/vc6-typeobject-add-method-locals-c89.test.py failed before the edit (exit 1, expected opening-declarations assertion), then passed (exit 0); 89 standalone typeobject tests passed. Compiler cleared those errors and advanced to line 5845 (dict); probe exit 2.
type_add_members() and type_add_getset(): declare dict at entry but retain dict = type->tp_dict after the same NULL guard. New scripts/vc6-typeobject-add-descriptors-dict-c89.test.py failed for both declarations before editing (exit 1), then passed both functions (exit 0). Compiler cleared both errors and advanced to line 5952 (r); probe exit 2.
overrides_hash(): declare int r; at entry; retain the first dictionary lookup after assert(dict != NULL) and retain the conditional second lookup and result/error propagation. New scripts/vc6-typeobject-overrides-hash-r-c89.test.py failed before editing (exit 1), then passed (exit 0). Final forced-fresh probe exit 2, total=109 compiled=108 cached=0 skipped=0; first errors now typeobject.c(6231) C2275 PyObject and C2065 bases. Later dict/doc errors remain untouched. See final-probe.log.

Exact probe invocation for each log: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh. Logs: before-probe.log, after-probe.log, descriptors-after-probe.log, final-probe.log.

Final standalone coverage: 91 scripts/vc6-typeobject-*.test.py scripts passed, zero failed (final-tests.json). These are source-structure/order regressions, not interpreter runtime tests. Full bash scripts/vc6-probe-pythoncore-frontier.test.sh was attempted but blocked before execution by the Hermes lifecycle guard: scan budget exhausted at remote-read depth 1. It is NOT reported as passing; its embedded tests were not extracted or reconstructed. Nested git diff --check and the outer check excluding the generated patch passed. The final unfiltered outer check exits 2 on single-space unified-diff context lines inside the regenerated .patch file; nested source whitespace remains clean. Kept these required context markers intact rather than corrupting the byte-equal patch. The exact session delta is in source.diff; only cpython/Objects/typeobject.c changed among all pre-existing files inventoried under scripts/, cpython/Objects/ and compat/ before intentional compatibility-patch regeneration.

Regenerated compat/msvc600/cpython-3.11.16-vc6-headers.patch from the complete nested git diff; verified byte equality against a fresh diff. The complete patch passes git apply --cached --check against an isolated pristine HEAD index (exit 0), without touching the user's real Git index or working tree. Prior patch backed up in the evidence directory. Files changed by this session: the C source, three new standalone regressions, the compatibility patch and this status entry.

Compile-only progress: still no linked pythoncore/python.exe, Wine interpreter execution or actual Windows 98 SE validation. Next narrow slice: fresh-confirm and isolate the bases declaration in the function at typeobject.c(6231). No completion percentage or runtime compatibility claimed.

`object_new()` `obj` C89 declaration slice (frontier advances)

Date: 2026-10-26 UTC. Requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before editing. Nested CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved all pre-existing outer/nested dirty and untracked paths; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change probe: mkdir -p build/cron-20261026-recheck; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-recheck/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The first stable errors were typeobject.c(4673) C2275 PyObject / C2065 obj for a declaration after statements. Full capture: build/cron-20261026-recheck/probe.log.

One authenticated Codex CLI 0.153.4 coding lane followed strict TDD. New scripts/vc6-typeobject-object-new-obj-c89.test.py failed before production edit (RED exit 1: object_new: obj must be in the opening declaration block (C89)). Minimal source change in cpython/Objects/typeobject.c: declare PyObject *obj; in object_new()'s opening block and replace the original initialized declaration with obj = type->tp_alloc(type, 0); at the same execution point. Focused regression passed (exit 0); all 87 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Exact-delta/preservation verification passed; all 286 other pre-existing dirty/untracked files remained unchanged. Nested git diff --check -- Objects/typeobject.c passed (exit 0); the new-test no-index whitespace check emitted no diagnostics (exit 1 because files differ).

The first delegated probe attempt exited 1 before compilation because Wine used a read-only runtime lock path. Parent retried with a writable runtime: mkdir -p /home/ubuntu/r build/cron-20261026-after-object-new-obj; chmod 700 /home/ubuntu/r; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-object-new-obj/probe.log 2>&1 — compiler probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. The former line-4673 errors cleared; first remaining diagnostics advance to typeobject.c(4897) C2275 PyTypeObject / C2065 newto, a separate declaration family left untouched. Capture: build/cron-20261026-after-object-new-obj/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-object-new-obj-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. No completed port is claimed. Next frontier: fresh-confirm and isolate only the typeobject.c(4897) newto declaration family.

`PyType_Type` designated-initializer C89 slice (frontier advances)

Date: 2026-10-26 UTC. Requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the CPython 3.11.16/MSVC6 reference before editing. CPython baseline: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved extensive pre-existing outer and nested dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change command: mkdir -p /home/ubuntu/r build/cron-20261026-fresh-designator; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-fresh-designator/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; first stable diagnostics were typeobject.c(4474) and (4520), C2059 on .nb_or and .tp_vectorcall. _blake2/blake2s_impl.c compiled. Capture: build/cron-20261026-fresh-designator/probe.log.

One focused authenticated Codex CLI 0.153.4 coding lane used strict TDD. Added scripts/vc6-typeobject-static-initializers-c89.test.py; against the original typeobject.c snapshot the corrected fixture fails as expected with type_as_number: designated initializer is not VC6/C89 compatible (exit 1). Minimal production change in cpython/Objects/typeobject.c converts the exact two unsupported designated initializers to positional structure initializers while checking all 36 PyNumberMethods and 48 _typeobject field mappings against the actual header layout. Focused fixture passes (exit 0); all 86 scripts/vc6-typeobject-*.test.py tests pass (exit 0); nested and outer scoped git diff --check pass (exit 0). Preservation verification: 4,901 pre-existing files byte-identical, only intended C source changed among prior files, Git indexes unchanged, and no status edits by the coding lane. The status log's attempted probe initially could not create Wine server locks with a repository-local runtime (exit 1); parent reran with /home/ubuntu/r.

Forced-fresh post-change command: mkdir -p build/cron-20261026-after-designator; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-designator/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0. Former line-4474/4520 designated-initializer diagnostics cleared; first stable diagnostics now advance to typeobject.c(4673) C2275 PyObject / C2065 obj, a separate declaration family left untouched. Capture: build/cron-20261026-after-designator/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-static-initializers-c89.test.py, and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. No completed port is claimed.

`_PyType_GetSubclasses()` `obj` C89 declaration slice (frontier advances)

Date: 2026-10-26 UTC. Requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the profile's skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before editing. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved the extensive pre-existing outer and nested dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change command: mkdir -p /home/ubuntu/r build/cron-20261026-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-current-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors in cpython/Objects/typeobject.c: line 4228 C2143 before type, line 4229 C2065 obj. Capture: build/cron-20261026-current-reprobe/probe.log.

One focused authenticated Codex CLI 0.153.4 lane was used, no commits. Strict TDD: new scripts/vc6-typeobject-get-subclasses-obj-c89.test.py failed before production edit (reported exit 1: obj absent from opening C89 declarations); source snapshot verified unchanged during RED. Minimal production edit in cpython/Objects/typeobject.c hoists PyObject *obj; into _PyType_GetSubclasses()'s entry locals and changes only its point-of-use declaration to obj = PyWeakref_GET_OBJECT(ref);, retaining evaluation timing and control flow. The lane updated only the directly coupled get-subclasses structural fixtures for the added local and assignment. Focused four scripts/vc6-typeobject-get-subclasses-*.test.py tests pass (exit 0); all 85 scripts/vc6-typeobject-*.test.py regressions pass (exit 0). Nested git diff --check -- Objects/typeobject.c and outer git diff --check -- scripts/vc6-typeobject-get-subclasses-*.test.py pass (exit 0). No changes to unrelated pre-existing paths were reported by the lane's snapshot check.

Forced-fresh post-change command: mkdir -p /home/ubuntu/r build/cron-20261026-after-obj; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-obj/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0. The line-4228/4229 errors cleared. First remaining compiler diagnostics are now typeobject.c(4474) C2059 on designated initializer .nb_or, followed by another at line 4520; the next frontier is a distinct VC6 language-feature blocker, left untouched. Capture: build/cron-20261026-after-obj/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-subclasses-obj-c89.test.py, the directly coupled get-subclasses index/ref/subclasses regression fixtures, and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter run, or Windows 98 SE execution. No completed port is claimed.

Diagnostics-only: requested BLAKE2 frontier stale; current typeobject blocker

Date: 2026-10-26 UTC. Requested path /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the CPython 3.11.16/MSVC6 reference before action. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved extensive pre-existing outer/nested work; no reset, clean, stash, discard, commit, push, or publication.

The requested _blake2/blake2s_impl.c sequence is no longer current. Its recorded condition was rechecked with forced-fresh command mkdir -p /home/ubuntu/r build/cron-20261026-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiles. The first errors now remain in cpython/Objects/typeobject.c at line 4228 (C2143 before type) and 4229 (C2065 obj); prior reported blockers at lines 4214–4227 are cleared. Full capture: build/cron-20261026-current-reprobe/probe.log.

No implementation was attempted because the current frontier is in a different source file/function than the requested slice and the checked-in local MSVC600/VC98/bin/VCVARS32.BAT path is absent (check exit 1). No test or production files were changed by this run. This is diagnostics-only, not a TDD implementation cycle. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: obtain the external MSVC600 launcher and then strictly test-first isolate the actual typeobject.c line-4228/4229 declaration family, after checking that recorded source state again. No completed port is claimed.

`_PyType_GetSubclasses()` loop index `i` C89 declaration slice (frontier advances)

Date: 2026-10-25 20:39 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved existing work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyType_GetSubclasses() declaration frontier was re-probed forced-fresh and remained valid but advanced: _blake2/blake2s_impl.c compiled; first stable errors moved to the late Py_ssize_t i = 0; at typeobject.c(4223). Exact pre-change command: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-blake2-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. Compiler diagnostics: C2275 Py_ssize_t, C2146 before i, C2065 undeclared i; subsequent ref/obj declarations were separate later blockers. The prior _blake2 frontier is stale; typeobject.c is current. Capture: build/cron-current-blake2-reprobe/probe.log.

Coding delegation: Hermes delegation provider could not start (Anthropic credentials unavailable); authenticated Codex CLI 0.153.4 was used as one focused coding lane. Strict TDD RED observed before production edit: new scripts/vc6-typeobject-get-subclasses-index-c89.test.py failed exit 1 with _PyType_GetSubclasses: i must be declared in the opening declaration block (C89); source equality against pre-RED snapshot was confirmed. Minimal production change in cpython/Objects/typeobject.c: declare Py_ssize_t i; with opening locals and replace late initialized declaration with i = 0; at the original point. The directly coupled scripts/vc6-typeobject-get-subclasses-subclasses-c89.test.py expectation was minimally widened to allow the new opening local. Leave later ref/obj blockers untouched. Focused test and coupled test passed (exit 0); all 83 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Parent independently reran these and both nested/outer scoped git diff --check; all exit 0.

Forced-fresh post-change command: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-blake2-after-i/probe.log 2>&1 — exit 2; summary still total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former i diagnostics cleared. First stable remaining diagnostics advance to typeobject.c(4225) C2275 PyObject / C2065 ref, then line 4228 C2143 and 4229 C2065 obj; ref is the next distinct declaration family and remains untouched. Capture: build/cron-current-blake2-after-i/probe.log.

Files changed by the slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-subclasses-index-c89.test.py, narrowly updated scripts/vc6-typeobject-get-subclasses-subclasses-c89.test.py, and this PORT_STATUS.md entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: force-fresh confirm and isolate only _PyType_GetSubclasses()'s ref C89 declaration. No completed port is claimed.

`_PyType_GetSubclasses()` `subclasses` C89 declaration slice (frontier advances)

Date: 2026-10-25 UTC. User-requested checkout /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Before changes, read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved existing dirty/untracked changes; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change command: mkdir -p /home/ubuntu/r build/cron-20261026-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics at cpython/Objects/typeobject.c(4214): C2275 PyObject and C2065 subclasses; later errors in this function include separate declarations. Capture: build/cron-20261026-current-reprobe/probe.log.

Hermes coding delegation attempted once but failed before launch because Anthropic credentials are unavailable. Authenticated Codex CLI 0.153.4 was used as one focused coding lane with strict TDD. New scripts/vc6-typeobject-get-subclasses-subclasses-c89.test.py failed before production edit (RED exit 1: _PyType_GetSubclasses: subclasses must be declared at function entry (C89)). The minimal production edit in cpython/Objects/typeobject.c declares PyObject *subclasses; at function entry and replaces only the late initialized declaration with subclasses = self->tp_subclasses; after the existing allocation-failure guard, preserving read timing. Focused test passed; all 82 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Preservation verification confirmed 282 pre-existing dirty/untracked files unchanged; nested and outer scoped git diff --check passed (exit 0).

Forced-fresh post-change command: mkdir -p /home/ubuntu/r build/cron-20261026-after-subclasses; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-subclasses/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The former subclasses diagnostics cleared; first remaining blocker advances within _PyType_GetSubclasses() to Py_ssize_t i at line 4223 (C2275/C2146/C2065), followed by the separate ref declaration at 4224 and obj declaration at 4227; these remain untouched. Full capture: build/cron-20261026-after-subclasses/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-subclasses-subclasses-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. Next frontier: force-fresh confirm and isolate only _PyType_GetSubclasses()'s loop-index i declaration. No completed port is claimed.

`type_dealloc()` `et` C89 declaration slice (frontier advances)

Date: 2026-11-17 UTC. The requested checkout /home/ubuntu/projects/python-win9x does not exist; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython 3.11.16/MSVC6 reference before acting. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved existing work; no reset, clean, stash, discard, commit, push, or publication. Outer working tree was already extensively dirty/untracked; nested CPython also had extensive pre-existing modifications.

Forced-fresh pre-change command: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261117-current-reprobe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable diagnostics at cpython/Objects/typeobject.c(4191): C2275 PyHeapTypeObject and C2065 et; member-access errors cascade. Exact output captured in the log.

Hermes coding delegation was attempted but failed before launch because configured Anthropic credentials are unavailable; authenticated Codex CLI is installed, but delegated tool cannot select its provider. Implemented one narrow strict-TDD slice directly. RED Python structural assertion failed as expected (exit 1): type_dealloc: et must be declared at function entry (C89). Minimal production edit in cpython/Objects/typeobject.c: add PyHeapTypeObject *et; at function entry and replace only the initialized declaration with et = (PyHeapTypeObject *)type; at the same point after PyObject_Free((char *)type->tp_doc);. Focused assertion passed (exit 0); all 81 applicable scripts/vc6-typeobject-*.test.py tests passed (0 failures, exit 0); git -C cpython diff --check -- Objects/typeobject.c passed (exit 0).

Forced-fresh post-change probe: same command with capture build/cron-20261117-after-et.log — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-4191 et diagnostics cleared. Next first stable diagnostics advance to typeobject.c(4214) in _PyType_GetSubclasses(): C2275 PyObject and C2065 subclasses; later declarations are separate and untouched. Files changed: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-dealloc-et-c89.test.py, and PORT_STATUS.md; probe logs are build artifacts. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter run, or Windows 98 SE execution. Next frontier: fresh-confirm and isolate only _PyType_GetSubclasses() subclasses declaration. No completed port is claimed.

Date: 2026-10-25 UTC. Requested checkout /home/ubuntu/projects/python-win9x does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read the current PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved the extensive existing dirty/untracked workspace; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh command: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-run/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics reconfirm at cpython/Objects/typeobject.c(4191): C2275 PyHeapTypeObject and C2065 et; subsequent member-access errors cascade. Full capture: build/cron-20261025-run/probe.log. The expected MSVC600/VC98/bin/VCVARS32.BAT path is absent (test exit 1), although the project probe itself successfully invoked the configured compiler.

One focused coding subagent was attempted, as required, but delegation failed before starting because the configured Anthropic provider has no credentials. No alternate coding CLI was available through the delegation workflow; no code or test edits were made. The exact et frontier is confirmed, but this run is diagnostics-only rather than a TDD implementation slice. Files changed by this run: PORT_STATUS.md only; the compiler log is a build artifact. This is compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: perform one strict-TDD, narrowly scoped et declaration slice with an available authenticated coding lane; then run applicable regressions and another forced-fresh probe. No completed port is claimed.

Diagnostics-only: current compiler frontier reconfirmed at `typeobject.c(4191)`

Date: 2026-10-25 UTC. Requested /home/ubuntu/projects/python-win9x does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference. Preserved existing work: outer checkout has 153 status entries (many modified/untracked), and nested CPython has 131; no reset, clean, stash, discard, commit, push, or publication. Baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Local VC6 launcher MSVC600/VC98/bin/VCVARS32.BAT is absent (check exit 1).

The requested _blake2/blake2s_impl.c condition is stale: forced-fresh command mkdir -p /home/ubuntu/r build/cron-20261025-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-current-reprobe/probe.log 2>&1 returned probe exit 2, summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics remain in cpython/Objects/typeobject.c(4191): C2275 PyHeapTypeObject and C2065 et, with subsequent member-access diagnostics cascading. Full capture: build/cron-20261025-current-reprobe/probe.log.

The required focused coding subagent could not start because configured Anthropic credentials are unavailable; Claude CLI is absent, and no alternate authenticated coding CLI was used. No source or tests were changed. Files changed by this run: PORT_STATUS.md only; probe log is a build artifact. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Next frontier: restore the external local-only MSVC600 launcher/toolchain, then use a focused strict-TDD coding lane to isolate the et declaration at typeobject.c(4191); no completed port is claimed.

`type_getattro()` local descriptor getter C89 declaration slice (frontier advances)

Date: 2026-10-25 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before editing. CPython checkout verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved extensive pre-existing work (outer repo has many dirty/untracked paths; CPython has many modified files); no reset, clean, stash, discard, commit, push, or publication. Anthropic coding delegation unavailable (no credentials); implementation done directly with TDD.

Forced-fresh pre-change probe: mkdir -p /home/ubuntu/r build/cron-20261025-current-reprobe && XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2s_impl.c compiled; first stable errors at cpython/Objects/typeobject.c(4025): C2275 descrgetfunc, C2146 before local_get, C2065 local_get, then C2063 at call. VC6 banner independently verified through Wine: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 (exit 0).

Strict TDD: new scripts/vc6-typeobject-type-getattro-local-get-c89.test.py failed before production edit (RED exit 1, assertion that local_get must precede statements in its block). The sole production edit in cpython/Objects/typeobject.c declares descrgetfunc local_get; before the block's statements, then assigns local_get = Py_TYPE(attribute)->tp_descr_get; at the original evaluation point. Focused test passed (exit 0); parent independently ran all 81 scripts/vc6-typeobject-*.test.py tests with the source path argument (81 passed, 0 failed, exit 0). git -C cpython diff --check -- Objects/typeobject.c passed (exit 0).

Forced-fresh post-change command: mkdir -p /home/ubuntu/r build/cron-20261025-after-type-getattro; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-after-type-getattro/probe.log 2>&1 — exit 2; summary still total=109 compiled=108 cached=0 skipped=0. The former line-4025 diagnostics cleared. First remaining stable family advances to typeobject.c(4191): C2275 PyHeapTypeObject and C2065 et; subsequent member-access errors cascade. Full capture: build/cron-20261025-after-type-getattro/probe.log.

Files changed by this run: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-getattro-local-get-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the et declaration at typeobject.c(4191). No completed port is claimed.

`_PyType_Lookup()` cache-update `entry` C89 declaration slice (frontier advances)

Date: 2026-10-25 UTC. Requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change probe: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic: cpython/Objects/typeobject.c(3927) C2143 at the late initialized struct type_cache_entry *entry; subsequent errors begin at line 4024. Full log: build/cron-20261025-autonomous-reprobe/probe.log.

One authenticated Codex CLI 0.153.4 coding lane followed strict TDD. New scripts/vc6-typeobject-lookup-cache-entry-c89.test.py failed before source edit (RED exit 1: _PyType_Lookup cache update: entry must precede statements (C89)). The sole production change in cpython/Objects/typeobject.c declares entry before the cache-update block statements and changes the initialized declaration into entry = &cache->hashtable[h]; immediately after the unchanged hash recalculation. Focused test passed; parent independently ran all 80 scripts/vc6-typeobject-*.test.py tests (80 passed, 0 failed). The lane's first post-change probe attempt failed before compilation because Wine tried to create a lock under a read-only runtime path (exit 1); parent retried with /home/ubuntu/r and forced fresh successfully.

Post-change probe command (same as above): exit 2; total=109 compiled=108 cached=0 skipped=0. The former line-3927 diagnostic cleared. First remaining diagnostics are in typeobject.c(4025): C2275 descrgetfunc, C2146 before local_get, C2065 local_get (later errors are cascading/additional blockers). Capture: build/cron-20261025-after-cache-entry/probe.log. Nested and outer scoped git diff --check passed (exit 0); exact source delta and preservation of all other baseline tracked/untracked paths, including pre-existing PORT_STATUS.md edits, were independently checked.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-lookup-cache-entry-c89.test.py, and this status entry. Compiler-probe progress only; no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm then isolate the lookup_maybe_method() descrgetfunc local_get declaration. No completed port is claimed.

`find_name_in_mro()` loop-index `i` C89 declaration slice (frontier advances)

Date: 2026-10-25 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read the current status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. MSVC600 launcher/banner verified through Wine: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 (exit 0).

Forced-fresh pre-change probe command: mkdir -p /home/ubuntu/r build/cron-20261025-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-current-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics at cpython/Objects/typeobject.c(3865): C2143 for C99 for (Py_ssize_t i...) and C2065 undeclared i; later typeobject.c diagnostics are independent/later. Capture: build/cron-20261025-current-reprobe/probe.log.

Hermes coding delegation could not start because Anthropic credentials are unavailable. One authenticated Codex CLI 0.153.4 lane followed strict TDD. The focused pre-existing scripts/vc6-typeobject-find-name-in-mro-c89.test.py first failed because its expectation was stale: it placed if directly after res, while n was already hoisted. The lane repaired this fixture expectation and observed RED specifically on loop-local i before changing production code. It then hoisted only Py_ssize_t i; into find_name_in_mro()'s opening declarations and changed the loop initializer to for (i = 0; ...); the directly coupled scripts/vc6-typeobject-find-name-in-mro-n-c89.test.py expectations were updated. Parent independently reran all 79 scripts/vc6-typeobject-*.test.py: 79 passed, 0 failed (exit 0). Outer and nested git diff --check passed (exit 0). Delegated hash verification reports only cpython/Objects/typeobject.c, the focused find-name fixture, and the coupled n fixture differ from the pre-lane snapshot; all other pre-existing modified/untracked files, including this status file before this entry, remained unchanged.

Forced-fresh after-change command: mkdir -p /home/ubuntu/r build/cron-20261025-after-find-name-i; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-after-find-name-i/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former diagnostics at typeobject.c(3865) cleared. First remaining diagnostic is typeobject.c(3927) C2143, followed by a distinct C2275/C2146/C2065 family at line 4024 (descrgetfunc local_get) and later declaration errors; these are untouched. Full capture: build/cron-20261025-after-find-name-i/probe.log.

Files changed by the implementation slice: cpython/Objects/typeobject.c, scripts/vc6-typeobject-find-name-in-mro-c89.test.py, scripts/vc6-typeobject-find-name-in-mro-n-c89.test.py, and this status record. This is compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. Next: inspect and isolate the actual typeobject.c(3927) blocker after a fresh confirmation. No completed port is claimed.

Diagnostics-only: recorded `find_name_in_mro()` state conflicts with checkout

Date: 2026-10-25 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing local state; no reset, clean, stash, discard, commit, push, or publication. CPython tag/commit verified as v3.11.16, 41388c9cb160d0886d5ca00d2e6c8782608a4549; compiler launcher exists and prior recorded banner is MSVC 12.00.8804.

The requested _blake2/blake2s_impl.c-frontier condition is not current: forced-fresh command mkdir -p /home/ubuntu/r build/cron-20261025-blake2-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261025-blake2-reprobe/probe.log 2>&1 returned probe exit 2, summary total=109 compiled=108 cached=0 skipped=0; the first blocker is cpython/Objects/typeobject.c, with first diagnostic family at line 3865: C2143 on C99 for (Py_ssize_t i...), undeclared i (C2065), and cascades. _blake2/blake2s_impl.c has local modifications and remains untouched. Full log: build/cron-20261025-blake2-reprobe/probe.log.

The recorded find_name_in_mro() mro/res fix is not reliably present in the checked-out source state: its existing focused regression python3 scripts/vc6-typeobject-find-name-in-mro-c89.test.py cpython/Objects/typeobject.c fails exit 1 at the opening-declaration assertion (also reports a Python invalid-escape SyntaxWarning). No production implementation was attempted because repository state is heavily dirty, source-list probe does not isolate the recorded target, and the fixture/source mismatch means the recorded frontier cannot safely be presumed. One 78-test loop attempt stopped at that first failing fixture; no full regression pass is claimed. Nested git -C cpython diff --check -- Objects/blake2/blake2s_impl.c and outer git diff --check -- PORT_STATUS.md both exit 0. No files outside this status record were changed by this run; probe output is an untracked build artifact.

Compiler-probe progress only. No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Next: reconcile the existing find_name_in_mro fixture and local production diff against prior work without overwriting any of it; then establish a narrowly targeted forced-fresh probe for the actual typeobject frontier before choosing a single slice. No completed port is claimed.

`find_name_in_mro()` `mro`/`res` C89 declaration slice (frontier advances)

Date: 2026-06-05 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before action. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. VC6 launcher/banner: wine cmd /c 'call Z:\\home\\ubuntu\\Organized\\Legacy-Ports\\Projects\\python-win9x\\MSVC600\\VC98\\Bin\\VCVARS32.BAT && cl' — exit 0; Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

Forced-fresh pre-change command: mkdir -p build/cron-20260605-frontier-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260605-frontier-reprobe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiles. First stable diagnostic family in typeobject.c(3842) was C2275 PyObject / C2065 mro; next late PyObject *res at 3857 also failed, followed by separate n/i declarations at 3861–3862. Capture: build/cron-20260605-frontier-reprobe/probe.log.

One coding-agent workflow was attempted: Hermes delegation failed because Anthropic credentials are unavailable. Authenticated Codex CLI 0.153.4 was used for the single focused lane. Strict TDD: new scripts/vc6-typeobject-find-name-in-mro-c89.test.py failed before production edit (RED exit 1, assertion that mro and res must be declared at function entry); after the minimal change the test passed (exit 0). Only the mro and res declarations were hoisted into function-entry locals and their initializers moved to their original points. Parent independently ran all 78 scripts/vc6-typeobject-*.test.py files; 78 passed, 0 failed (exit 0). Nested production and outer new-test git diff --check passed (exit 0). Codex verified 278 pre-existing files preserved; reviewed full CPython diff and it includes extensive earlier local modifications, with this slice limited to find_name_in_mro() plus the focused new test.

Forced-fresh post-change command: mkdir -p build/cron-20260605-after-find-name-in-mro; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260605-after-find-name-in-mro/probe.log 2>&1 — exit 2. Former mro/res diagnostics cleared; first stable blocker advances to typeobject.c(3863) C2275/C2146/C2065 for Py_ssize_t n, followed by C99 loop-index i diagnostics at 3864. Left untouched. Capture: build/cron-20260605-after-find-name-in-mro/probe.log.

Files changed in this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-find-name-in-mro-c89.test.py, and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the n declaration in find_name_in_mro(). No completed port is claimed.

`PyType_GetModuleByDef()` `ht`/`module` C89 declaration slice (frontier advances)

Date: 2026-10-24 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before action. Preserved all existing modified/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; MSVC600 local bundle is present.

Forced-fresh pre-change command: mkdir -p build/cron-20261024-followup/runtime; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-followup/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The recorded PyType_GetModuleByDef() frontier remained current: first stable errors at typeobject.c(3807) C2143 and (3808) C2275/C2065 for late PyHeapTypeObject *ht / PyObject *module declarations.

One authenticated Codex CLI 0.153.4 coding lane used strict TDD and preserved pre-existing state. New scripts/vc6-typeobject-get-module-by-def-ht-module-c89.test.py failed against unchanged source (RED exit 1, expected opening-declarations assertion). The minimal production change declares ht and module with existing function-entry locals and changes their initializers to assignments at the original point after the static-type skip. Directly coupled index, mro, and n fixtures were updated for the changed declarations/assignments. Focused regression passed (exit 0); parent independently reran all 77 scripts/vc6-typeobject-*.test.py tests (77 passed, 0 failed, exit 0). Both nested production and outer test git diff --check commands exited 0. Snapshot verification reported no unrelated pre-existing modified/untracked paths changed.

Forced-fresh after-change command: mkdir -p build/cron-20261024-after-ht-module; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-ht-module/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The ht/module diagnostics cleared. First stable diagnostics now occur in find_name_in_mro() at typeobject.c(3842) (C2275 PyObject, C2065 mro), followed by res at 3857 and C99 n/i declarations at 3861–3862. These are a distinct next function/frontier and remain untouched. Full capture: build/cron-20261024-after-ht-module/probe.log.

Files changed in this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-get-module-by-def-ht-module-c89.test.py; updated scripts/vc6-typeobject-get-module-by-def-index-c89.test.py, scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py, scripts/vc6-typeobject-get-module-by-def-n-c89.test.py; and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm then isolate only the first C89 declaration family in find_name_in_mro(). No completed port is claimed.

`PyType_GetModuleByDef()` loop-index `i` C89 declaration slice (frontier advances)

Date: 2026-10-24 UTC. Requested checkout /home/ubuntu/projects/python-win9x was absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Outer HEAD remains 35caf1a558e6b2c5bf501894d8972f8b0dd828a6. VC6 launcher/banner check: wine cmd /c 'call Z:\home\ubuntu\Organized\Legacy-Ports\Projects\python-win9x\MSVC600\VC98\Bin\VCVARS32.BAT && cl' — exit 0; Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The status-recorded frontier was stale. Forced-fresh pre-change command: mkdir -p build/cron-20261024-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-current-reprobe/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic family was typeobject.c(3799): C2143 on the C99 for (Py_ssize_t i = ...) initializer and C2065 undeclared i; dependent loop/syntax errors followed. Capture: build/cron-20261024-current-reprobe/probe.log.

One authenticated Codex CLI 0.153.4 coding lane used strict TDD. New scripts/vc6-typeobject-get-module-by-def-index-c89.test.py failed before source edit (RED exit 1, expected assertion that i must be in the opening C89 locals). The sole production change in cpython/Objects/typeobject.c hoists Py_ssize_t i; alongside existing mro and n locals and changes the loop initializer to i = 0; loop bounds, increment, body, and evaluation order are otherwise unchanged. The existing scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py and scripts/vc6-typeobject-get-module-by-def-n-c89.test.py fixtures were narrowly updated to include the added declaration and preserve the loop form. The focused new regression passed (exit 0); parent reran all 76 scripts/vc6-typeobject-*.test.py tests (76 passed, 0 failed; exit 0). Nested and outer scoped git diff --check passed (exit 0).

Forced-fresh post-change command: mkdir -p /home/ubuntu/r build/cron-20261024-after-index; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-index/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0. The i diagnostics cleared. First stable diagnostics advance to typeobject.c(3807) C2143 before type, then line 3808 C2275 PyObject / C2065 module and ht in the separate late PyHeapTypeObject *ht / PyObject *module declarations; these were left untouched. Full capture: build/cron-20261024-after-index/probe.log. An initial delegated probe attempt used a repository-local XDG runtime and failed before compilation due Wine server lock/socket setup (exit 1); parent reran with /home/ubuntu/r and obtained the valid forced-fresh result above.

Files changed in this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-get-module-by-def-index-c89.test.py; updated scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py and scripts/vc6-typeobject-get-module-by-def-n-c89.test.py; and this status entry. This is compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the next PyType_GetModuleByDef() late declaration family at lines 3807–3808. No completed port is claimed.

`PyType_GetModuleByDef()` `mro` C89 declaration slice (frontier advances)

Date: 2026-10-24 12:00 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before changes. Preserved pre-existing local work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261024-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The typeobject.c first stable diagnostics were line 3788 C2143 before type, line 3790 C2065 mro, and then distinct later n/i errors at lines 3796–3797. Capture: build/cron-20261024-current-reprobe/probe.log.

One authenticated Codex CLI 0.153.4 coding lane followed strict TDD and preserved state. New scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py failed against unchanged source (RED exit 1: mro must be declared at function entry (C89)); cmp confirmed source unchanged during RED. The only production edit declares PyObject *mro; before the assertion and assigns mro = type->tp_mro; at its original evaluation point. Focused test passed (exit 0); all 74 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). Parent independently repeated both checks and scoped outer/nested git diff --check (all exit 0). Snapshot verification found all 273 other pre-existing modified/untracked files unchanged.

Forced-fresh after-change command: mkdir -p build/cron-20261024-after-get-module-by-def-mro/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-after-get-module-by-def-mro/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-get-module-by-def-mro/probe.log 2>&1 — probe exit 2; summary unchanged total=109 compiled=108 cached=0 skipped=0. Former mro errors cleared. First stable blocker advances to line 3797 C2275 Py_ssize_t, C2146 before n, and C2065 n; the separate C99 loop initializer i at 3798 follows. Both untouched. Capture: build/cron-20261024-after-get-module-by-def-mro/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the Py_ssize_t n declaration in PyType_GetModuleByDef(). No completed port is claimed.

`PyType_GetModule()` `et` C89 declaration slice (frontier advances)

Date: 2026-10-24 09:48 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing dirty/untracked paths; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261116-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261116-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261116-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic family: cpython/Objects/typeobject.c(3756) C2275 PyHeapTypeObject and C2065 et; dependent C2223 diagnostics cascade in PyType_GetModule(). Capture: build/cron-20261116-current-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD and preserved all prior changes. New scripts/vc6-typeobject-get-module-et-c89.test.py failed against unchanged production source (RED exit 1, expected declaration-placement assertion). The only production change declares PyHeapTypeObject *et; at PyType_GetModule() entry and changes the original cast declaration into et = (PyHeapTypeObject*)type; at the same execution point. Focused test passed (exit 0); all 73 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). git -C cpython diff --check -- Objects/typeobject.c passed (exit 0); check of the new untracked test emitted no whitespace diagnostics (git --no-index returned 1 because files differ).

Forced-fresh after-change command: mkdir -p build/cron-20261116-after-get-module-et/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261116-after-get-module-et/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261116-after-get-module-et/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former PyType_GetModule() diagnostics cleared. First remaining blocker advances to PyType_GetModuleByDef() at typeobject.c(3788), C2143 before type and C2065 mro, followed by separate late Py_ssize_t n and loop-index errors at 3796–3797; untouched. Capture: build/cron-20261116-after-get-module-et/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-module-et-c89.test.py, and this status record. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the PyType_GetModuleByDef() mro declaration family. No completed port is claimed.

`PyType_FromModuleAndSpec()` `memb` C89 loop declaration slice (frontier advances)

Date: 2026-10-23 22:51 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before changes. Preserved existing modifications/untracked work; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change compiler probe: mkdir -p build/cron-20260603-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20260603-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260603-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic family: cpython/Objects/typeobject.c(3452) C2143 before type, then C2065 memb; subsequent member-access diagnostics cascade. Capture: build/cron-20260603-reprobe/probe.log.

Hermes delegation was unavailable because no Anthropic credentials were configured. One authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) performed the isolated implementation work with preservation checks. Strict TDD: new scripts/vc6-typeobject-from-module-and-spec-memb-c89.test.py failed against the unchanged production source at its declaration-placement assertion (RED, exit 1); the pre-edit typeobject.c snapshot comparison confirmed it was unchanged. The minimal production change declares const PyMemberDef *memb; at the start of the Py_tp_members block and changes the loop header to for (memb = slot->pfunc; ...), keeping initialization/evaluation at the original loop point. No other behavior or fixture changed. Focused GREEN passed (exit 0); all 69 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Delegated hash/snapshot verification reported all 268 other pre-existing dirty paths unchanged and the production delta exact. Scoped outer/nested git diff --check passed (exit 0).

Forced-fresh post-change probe command: mkdir -p build/cron-20260603-after-memb/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20260603-after-memb/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260603-after-memb/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-3452 errors cleared. First remaining stable errors advance to typeobject.c(3493) C2143 before const, followed by C2065 s; this separate late const char *s declaration in PyType_FromModuleAndSpec() is untouched. Full capture: build/cron-20260603-after-memb/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-from-module-and-spec-memb-c89.test.py, and this status record. Compiler-frontier probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the PyType_FromModuleAndSpec() const char *s declaration family at line 3493. No completed port is claimed.

`type_vectorcall()` `tstate` C89 declaration slice (frontier advances)

Date: 2026-11-16 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the active-profile CPython Win9x/MSVC6 reference. Preserved all existing dirty/untracked changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261116-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261116-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261116-frontier/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable blocker: cpython/Objects/typeobject.c(3409), C2275 PyThreadState and C2065 tstate in type_vectorcall(). Full capture: build/cron-20261116-frontier/probe.log.

Strict TDD via one authenticated Codex CLI fallback lane (Hermes delegation provider unavailable: Anthropic credentials missing). New scripts/vc6-typeobject-type-vectorcall-tstate-c89.test.py failed before production edit as expected (RED exit 1, missing opening declaration assertion). Hoisted only PyThreadState *tstate; to the opening declarations and retained _PyThreadState_GET() at the existing fallback execution point. The existing scripts/vc6-typeobject-type-vectorcall-nargs-c89.test.py required a narrow expectation update for that declaration placement. Focused regression passed; all 68 scripts/vc6-typeobject-*.test.py passed (exit 0); outer and nested git diff --check passed. The first full regression attempt had one stale fixture expectation (67 pass/1 fail); after the coupled expectation update the full run was clean.

Forced-fresh post-change command: mkdir -p build/cron-20261116-after-tstate/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261116-after-tstate/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261116-after-tstate/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. Former line-3409 C2275/C2065 errors cleared. Next stable blocker advances to typeobject.c(3452): C2143 missing ; before type, C2065 memb, followed by cascading member-access errors; left untouched. Full capture: build/cron-20261116-after-tstate/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-vectorcall-tstate-c89.test.py, adjusted scripts/vc6-typeobject-type-vectorcall-nargs-c89.test.py, and this status record. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next: force-fresh confirm and isolate only the new typeobject.c(3452) declaration/initializer family. No completed port is claimed.

`type_vectorcall()` `tstate` declaration frontier (diagnostics only)

Date: 2026-11-15 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before work. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh probe: mkdir -p build/cron-20261115-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261115-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261115-frontier/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The first stable diagnostic is cpython/Objects/typeobject.c(3407): C2275 PyThreadState and C2065 tstate, corresponding to type_vectorcall()'s late initialized PyThreadState *tstate. The old type_new() frontier is stale. Full capture: build/cron-20261115-frontier/probe.log.

The Hermes coding subagent could not start (Anthropic credentials unavailable). The authenticated Codex CLI fallback was launched in an ephemeral workspace-write lane, but its session/result was not retrieved in this run; no delegated changes are claimed as verified. Existing regressions: all 66 scripts/vc6-typeobject-*.test.py passed (exit 0); focused scripts/vc6-typeobject-vectorcall-maybe-c89.test.py passed (exit 0). python3 -m pytest scripts/vc6-typeobject-*.test.py -q could not run because pytest is not installed (exit 1). A broad *vectorcall* invocation initially failed four fixtures because they require source-path arguments; with one supplied path, three applicable vectorcall tests passed but the range-object fixture was given the wrong source path and failed. This was an invocation error, not an established product regression. git -C cpython diff --check -- Objects/typeobject.c exited 0. No source/test modifications by this run are confirmed; this status record and the forced probe log were written.

Compiler-probe progress only. No linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. Next: inspect/retrieve delegated lane outcome; if absent or no valid result, TDD only the type_vectorcall() tstate declaration placement, run targeted regressions and forced-fresh compiler probe. No completed port is claimed.

`type_new()` `type`/`res` C89 declaration slice

Date: 2026-10-23 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference first. Preserved pre-existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261023-recheck/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-recheck/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics at typeobject.c(3373) C2275 PyObject / C2065 type, then C2143 at 3374 and C2065 res at 3375; later separate PyThreadState diagnostics at 3405. Full capture: build/cron-20261023-recheck/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed TDD. New scripts/vc6-typeobject-type-new-c89.test.py failed before source edit as expected (RED exit 1, assertion that declarations must be in opening block). Hoisted only PyObject *type and int res into type_new() declarations; assignments remain at their original execution points. Narrowly updated directly coupled type-new-args and type-new-ctx fixture expectations. Focused test plus both coupled tests passed; all 66 scripts/vc6-typeobject-*.test.py passed (exit 0). Nested source git diff --check passed; outer check for three affected fixtures passed. Changes: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-c89.test.py, and updated scripts/vc6-typeobject-type-new-args-c89.test.py / scripts/vc6-typeobject-type-new-ctx-c89.test.py.

Post-change VC6 probe was not run: MSVC600/VC98/bin/VCVARS32.BAT is absent. Thus no compiler progress is verified for this slice; no pythoncore/python.exe link, Wine interpreter run, or Windows 98 SE run. Next frontier remains the recorded type_new local declarations, including the later PyThreadState *tstate family, and requires restoring the local-only compiler bundle for actual post-change probe. No completed port is claimed.

Diagnostics-only: `type`/`res` frontier reconfirmed; compiler bundle absent

Date: 2026-10-23 09:56 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing dirty and untracked work; no reset, clean, stash, discard, commit, push, or publication. Baseline verified: CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The current recorded frontier was re-probed forced-fresh. Command: mkdir -p build/cron-20261109-frontier-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261109-frontier-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable errors reconfirmed at cpython/Objects/typeobject.c(3373): C2275 PyObject and C2065 type; line 3374 C2143 before type; line 3375 C2065 res. The later PyThreadState/tstate errors at 3405 are a separate later family. Full capture: build/cron-20261109-frontier-reprobe/probe.log.

MSVC600/VC98/bin/VCVARS32.BAT remains absent (file check exit 1), so the actual VC6 compiler banner/probe cannot be executed and no source slice can be safely verified. No coding subagent, source edit, or regression edit was made; this run is diagnostics-only and not a TDD cycle. Files changed by this run: PORT_STATUS.md only; probe log is an untracked build artifact. Compiler-frontier probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. Next frontier: restore the external local-only MSVC600 bundle, then add a RED placement regression and isolate only the type/res declaration family, run focused regressions, and force-fresh probe. No completed port is claimed.

Diagnostics-only: current `type`/`res` frontier confirmed; VC6 bundle unavailable

Date: 2026-11-06 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing local changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh command: mkdir -p build/cron-20261106-refresh/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261106-refresh/probe.log 2>&1 — probe exit 2; _blake2/blake2s_impl.c compiled. First stable errors reconfirm at cpython/Objects/typeobject.c(3373): C2275 PyObject / C2065 type, followed by line 3374 C2143 before type and line 3375 C2065 res. Later diagnostics include line 3405 PyThreadState/tstate; left untouched. Capture: build/cron-20261106-refresh/probe.log.

MSVC600/VC98/bin/VCVARS32.BAT is absent (check returned absent). Therefore no implementation slice could be safely verified with the required actual compiler, and no source/test was changed. The single Hermes coding-delegation attempt failed to start because the configured Anthropic provider has no credentials; no fallback coding CLI was invoked. Files changed by this run: PORT_STATUS.md only; the forced probe log is an untracked build artifact. This is diagnostics-only, not a TDD cycle. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: restore the external local-only MSVC600 bundle, add a RED declaration-placement regression, then isolate only the type/res declarations at lines 3373–3375, run focused regressions, and force-fresh probe. No completed port is claimed.

Diagnostics-only: `type_new()` context frontier advanced to `type`/`res`; VC6 bundle missing

Date: 2026-10-23 UTC. Requested /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md first. Preserved all existing local modifications and untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c frontier is stale. Forced-fresh probe command: mkdir -p build/cron-current-20261106/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-20261106/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics now reconfirm at cpython/Objects/typeobject.c(3373): C2275 PyObject and C2065 type; next line 3374 C2143 before type, then line 3375 C2065 res. Later independent errors include line 3405 PyThreadState/tstate; subsequent diagnostics are not part of this first blocker. Full capture: build/cron-current-20261106/probe.log.

The external compiler launcher MSVC600/VC98/bin/VCVARS32.BAT is absent (checked; exit 1), so no safe code slice with required post-edit VC6 verification was available. No coding subagent or source/test edit was made. Applicable regressions: all 65 scripts/vc6-typeobject-*.test.py scripts passed (exit 0); git -C cpython diff --check -- Objects/typeobject.c passed (exit 0). Files changed by this run: PORT_STATUS.md only; probe output is an untracked build artifact. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: restore the external MSVC600 compiler bundle, then add a RED declaration-placement regression and isolate only the type/res declarations at typeobject.c(3373–3375), verify applicable regressions and force-fresh probe. No completed port is claimed.

`type_new()` context declaration C89 slice (frontier advances)

Date: 2026-10-23 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved pre-existing local modifications/untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change probe: mkdir -p build/cron-20261106-frontier-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261106-frontier-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261106-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable diagnostics at cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, C2059 at {; subsequent member diagnostics cascade. The actual MSVC600/VC98/bin/VCVARS32.BAT launcher is absent, confirmed by file check (exit 1), so no coding delegation requiring compiler-backed confirmation was appropriate. One focused authenticated Codex CLI lane (codex-cli 0.153.4) followed strict TDD under workspace-write/ephemeral, with explicit preservation constraints.

RED: python3 scripts/vc6-typeobject-type-new-ctx-c89.test.py against unchanged production source exited 1 at the expected opening-declaration assertion. The old fixture only extracted the initializer and did not establish its placement. GREEN: hoisted only type_new_ctx ctx; into type_new()'s declaration block; replaced the original {0} initializer with memset(&ctx, 0, sizeof(ctx)); at the original post-parse point, preserving zeroing and the existing field assignments' order. Updated the directly coupled argument-prefix fixture. Focused test passed, and all 65 scripts/vc6-typeobject-*.test.py scripts passed (exit 0). Snapshot check verified all 263 other pre-existing dirty/untracked files byte-identical, including PORT_STATUS.md before this record. git -C cpython diff --check -- Objects/typeobject.c exited 0.

Forced-fresh after-change probe: mkdir -p build/cron-20261106-after-type-new-ctx/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261106-after-type-new-ctx/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261106-after-type-new-ctx/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The former line-3365 context declaration errors cleared; first remaining blocker advances to typeobject.c(3373) C2275 PyObject / C2065 type, followed by C2143/C2065 for res at 3374–3375. These distinct declarations remain untouched. Captures are in the two build directories. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution.

Files changed by this slice: cpython/Objects/typeobject.c; scripts/vc6-typeobject-type-new-ctx-c89.test.py; directly coupled scripts/vc6-typeobject-type-new-args-c89.test.py; and this status record. Next frontier: fresh-confirm and isolate the separate type/res declarations beginning at typeobject.c(3373). No completed port is claimed.

Diagnostics-only: `type_new_ctx` declaration frontier reconfirmed; VC6 bundle absent

Date: 2026-10-22 23:19 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing work; no reset, clean, stash, discard, commit, push, or publication. Baseline verified: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh command: mkdir -p build/cron-20261029-run-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-run-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics remain at cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, and C2059 at {; following C2224 member errors cascade. Capture: build/cron-20261029-run-reprobe/probe.log. MSVC600/VC98/bin/VCVARS32.BAT remains absent (check exit 1), preventing safe compiler-backed implementation verification. No coding subagent or source/test changes were appropriate; this is diagnostics-only and not a TDD cycle. Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: restore the external local-only MSVC600 bundle, then test-first hoist only type_new_ctx ctx into the C89 declaration block, run focused regressions, and force-fresh probe. No completed port is claimed.

Date: 2026-10-29 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved all existing changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded state was rechecked and remains current: forced-fresh command mkdir -p build/cron-20261029-recheck/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-recheck/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors reconfirm at cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, and C2059 at {; following member-access errors cascade. Capture: build/cron-20261029-recheck/probe.log.

No implementation was safe: prerequisite MSVC600/VC98/bin/VCVARS32.BAT is absent in the working checkout. No test/code changes and no coding-agent delegation were made; this remains diagnostics-only, not a TDD cycle. Files changed by this run: PORT_STATUS.md only. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Next frontier: restore the local external MSVC600 compiler bundle, then add a RED regression for hoisting type_new_ctx ctx into the C89 declaration block, implement only that placement fix, run focused regressions and a forced-fresh VC6 probe. No completed port is claimed.

Date: 2026-10-29 UTC. The requested checkout /home/ubuntu/projects/python-win9x does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython 3.11.16/MSVC6 reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing changes and untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh current-frontier probe: mkdir -p build/cron-20261029-fresh-frontier; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-fresh-frontier/probe.log 2>&1 — exit 2; source-list run compiles 108 of 109 entries with zero cached/skipped, and _blake2/blake2s_impl.c compiled. First stable blocker reconfirms cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, and C2059 at {; subsequent field errors are cascading. Full capture: build/cron-20261029-fresh-frontier/probe.log.

No implementation or regression test was changed. The prerequisite local compiler launcher MSVC600/VC98/bin/VCVARS32.BAT is absent (file check returned absent), so post-edit VC6 verification is unavailable in this workspace; did not delegate code changes that could not be independently checked against the actual compiler frontier. No test cycle was claimed. Files changed by this run: PORT_STATUS.md only. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: once the external MSVC600 bundle/launcher is restored, add a focused RED test for placing type_new_ctx ctx in the declaration block, then make only that declaration-placement change, run its focused test and applicable regressions, and force-fresh probe again. No completed port is claimed.

Diagnostics-only: `type_new_ctx` blocker reconfirmed; coding model unavailable

Date: 2026-10-22 UTC. The requested checkout /home/ubuntu/projects/python-win9x does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved the pre-existing dirty/untracked workspace (136 outer status entries); no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh probe command: mkdir -p build/cron-20261022T-current-frontier-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022T-current-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics reconfirm cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, and C2059 at {; following field errors cascade. Capture: build/cron-20261022T-current-frontier-reprobe/probe.log.

The previously recorded type_new_ctx initializer issue is stale as a defect family: existing local code already uses {0} and explicit assignments; the current actual issue is the declaration occurring after statements. A single focused Codex lane was attempted but could not run because the selected model was at capacity (exit 1, per existing build/codex-type-new-ctx.log). The local VC6 bundle path MSVC600/VC98/bin/VCVARS32.BAT is also absent, so no coding delegation or implementation/test slice was safe. No source/test files changed.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: use a runnable coding lane to add a placement-focused RED test for type_new_ctx ctx, then narrowly hoist that declaration while leaving initialization/field assignments at their execution point. No completed port is claimed.

Diagnostics-only: `type_new_ctx` frontier reconfirmed; coding lane blocked

Date: 2026-10-22 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython 3.11.16/MSVC6 reference at ~/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing changes and untracked files. No reset, clean, stash, discard, commit, push, or publication. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh probe command: mkdir -p build/cron-current-frontier-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable blocker reconfirms typeobject.c(3365) designated initializer for type_new_ctx ctx, with C2275/C2146/C2065/C2059, followed by cascading diagnostics; later errors include C99 declarations. Capture: build/cron-current-frontier-reprobe/probe.log.

Coding-delegation prerequisites: codex-cli 0.153.4, authenticated (codex login status reported Logged in using ChatGPT); checkout already contained 136 dirty/untracked paths. One focused Codex CLI coding lane was attempted with strict-TDD instructions and exact scope, but stopped before edits because the selected model was at capacity (Codex exit 1; capture build/codex-type-new-ctx.log). No production code or tests changed in this run. This run therefore remains diagnostics-only; no test cycle was claimed.

Files changed by this run: this PORT_STATUS.md entry only. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: inspect the type_new_ctx definition and isolate the designated initializer when a coding lane can execute. No completed port is claimed.

`type_new()` argument local C89 declaration slice (frontier advances)

Date: 2026-10-21 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all pre-existing dirty/untracked files; no reset, clean, stash, discard, commit, push, or publication. Nested CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine command: mkdir -p build/cron-20261021-frontier-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-frontier-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics were typeobject.c(3355) C2143 before type, then C2065 for name, bases, orig_dict at 3357–3359. Capture: build/cron-20261021-frontier-reprobe/probe.log.

Anthropic subagent delegation was unavailable (no credentials); one authenticated Codex CLI 0.153.4 fallback lane performed strict TDD. New scripts/vc6-typeobject-type-new-args-c89.test.py failed before the production edit (RED exit 1 at the expected declaration-placement assertion); source comparison confirmed the C file remained unchanged during RED. The only production change hoists PyObject *name, *bases, *orig_dict; into the opening declaration block of type_new(); argument assertions and PyArg_ParseTuple remain at their original execution point. Focused regression passed, and all 64 scripts/vc6-typeobject-*.test.py regressions passed individually. Snapshot verification reported 263 other pre-existing dirty/untracked files unchanged, including PORT_STATUS.md until this entry was added. Outer and nested git diff --check both exited 0.

Forced-fresh after-change command: mkdir -p build/cron-20261021-after-type-new-args/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-after-type-new-args/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-after-type-new-args/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former errors at 3355–3359 cleared. First stable blocker advances to the distinct type_new_ctx ctx C99 designated initializer at typeobject.c(3365) (C2275/C2146/C2065/C2059); later declarations also remain. Capture: build/cron-20261021-after-type-new-args/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-args-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: separately evaluate and isolate the type_new_ctx designated initializer; untouched in this slice. No completed port is claimed.

`type_new_get_bases()` `base` local C89 declaration slice (frontier advances)

Date: 2026-10-21 21:40 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the active-profile CPython Win9x/MSVC6 reference before work. Preserved all existing dirty and untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261029-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261029-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors were typeobject.c(3336) C2275 PyTypeObject / C2065 base in type_new_get_bases(); following diagnostics begin at type_new() line 3354. Capture: build/cron-20261029-current-reprobe/probe.log.

Coding delegation was attempted once via Hermes but the configured Anthropic provider had no credentials. The authenticated Codex CLI fallback inspected the task and found the initial suggested function name was wrong: the actual line-3336 frontier is type_new_get_bases(), not type_new_impl(). That lane stopped without edits; resuming it was unavailable. Following the requested actual-frontier instruction, strict TDD was then performed in the parent workspace. New scripts/vc6-typeobject-type-new-get-bases-base-c89.test.py failed before the production edit (RED exit 1 at the expected opening-declaration assertion). The sole production change declares PyTypeObject *base; alongside the existing opening locals and changes the later initialized declaration to base = best_base(ctx->bases); at the same evaluation point. Directly affected type_new_get_bases() fixture expectations were narrowly updated in the existing index, new-bases, and winner regression scripts. Focused regression passed; all 63 scripts/vc6-typeobject-*.test.py scripts passed (0 failures). Outer git diff --check and nested git -C cpython diff --check -- Objects/typeobject.c passed (exit 0).

Forced-fresh after-change command: mkdir -p build/cron-20261029-after-get-bases-base/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261029-after-get-bases-base/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-after-get-bases-base/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-3336 C2275/C2065 errors are cleared. First stable diagnostic advances to typeobject.c(3355) C2143 (missing ; before type) with related C2065 undeclared name, bases, and orig_dict at 3357–3359 in the following type_new() function; left untouched. Capture: build/cron-20261029-after-get-bases-base/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-type-new-get-bases-base-c89.test.py; narrowly adjusted scripts/vc6-typeobject-type-new-get-bases-index-c89.test.py, scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py, and scripts/vc6-typeobject-type-new-get-bases-winner-c89.test.py; and this status entry. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: fresh-confirm and isolate only the type_new() name, bases, orig_dict declaration family beginning at line 3355. No completed port is claimed.

`type_new_init()` C89 local declaration slice (frontier advances)

Date: 2026-10-28 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261028-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261028-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261028-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable errors: typeobject.c(3219) C2275/C2065 for initialized PyTypeObject *type; related C2223 at 3224; next declaration family at 3226 (PyHeapTypeObject *et). Capture: build/cron-20261028-current-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, ephemeral workspace-write; no commit) followed TDD. New scripts/vc6-typeobject-type-new-init-c89.test.py first failed against unchanged source (RED exit 1, expected opening-declaration assertion; cmp verified unchanged typeobject.c). Minimal production edit hoisted only PyTypeObject *type and PyHeapTypeObject *et into the function's opening declarations and changed their later initialized declarations to assignments at the same execution points. Focused test passed (exit 0); all 58 scripts/vc6-typeobject-*.test.py tests passed individually (0 failures). Snapshot hash check confirmed only cpython/Objects/typeobject.c changed among existing paths and only the new focused regression was added; pre-existing dirty PORT_STATUS.md and all other pre-existing paths remained byte-identical during the coding lane. Outer and nested git diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261028-after-type-new-init/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261028-after-type-new-init/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-3219/3226 diagnostics cleared. First current stable diagnostics advance to typeobject.c(3286) C2275/C2065 for PyObject *new_bases in type_new_impl(); later C99 loop initializer at 3294 is separate and left untouched. The targeted source compiled with those later errors. Capture: build/cron-20261028-after-type-new-init/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-init-c89.test.py, and this entry in PORT_STATUS.md. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only type_new_impl()'s new_bases declaration. No completed port is claimed.

`type_new_get_slots()` `new_slots` declaration C89 slice (frontier advances)

Date: 2026-10-27 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing modifications/untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The formerly recorded typeobject.c(3025) loop-index frontier had cleared. Forced-fresh pre-change probe command: mkdir -p build/cron-20261027-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261027-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261027-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. Initial blocker was cpython/Objects/typeobject.c(3185) C2275 (PyObject) / C2065 (new_slots), in type_new_get_slots(). Log: build/cron-20261027-current-reprobe/probe.log.

Anthropic-backed delegation was unavailable (missing credentials); one authenticated Codex CLI 0.153.4 fallback lane followed TDD. New scripts/vc6-typeobject-type-new-get-slots-new-slots-c89.test.py first failed against unchanged C source (RED exit 1, expected opening-declaration assertion; cmp verified unchanged source). Minimal edit moves only PyObject *new_slots; from just before its first use to the opening declarations of type_new_get_slots(). No expressions or behavior changed. Focused GREEN passed (exit 0); all 57 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Snapshot verification confirmed only cpython/Objects/typeobject.c and that new test changed; all 11,461 other pre-existing paths preserved byte/mode-identically. git diff --check and git -C cpython diff --check -- Objects/typeobject.c both exited 0.

Forced-fresh after-change probe: mkdir -p build/cron-20261027-after-get-slots; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261027-after-get-slots/probe.log 2>&1 — exit 2; summary unchanged at total=109 compiled=108 cached=0 skipped=0. Former line-3185 errors cleared. First current errors are typeobject.c(3219) C2275 (PyTypeObject) and C2065 (type), with related C2223 at 3224; this distinct type_new_slots_impl() declaration family was left untouched. Capture: build/cron-20261027-after-get-slots/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-get-slots-new-slots-c89.test.py, and this status record. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only type_new_slots_impl()'s type declaration. No completed port is claimed.

`type_new_descriptors()` C89 loop-index slice (frontier advances)

Date: 2026-10-21 06:08 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing modified/untracked work; no reset, clean, stash, discard, commit, push, or publication. Nested CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A forced-fresh VC6/Wine probe verified the prior type_new_classmethod() frontier had cleared and _blake2/blake2s_impl.c compiled. First stable errors were at cpython/Objects/typeobject.c(3025), C2143 on the C99 for (Py_ssize_t i...) initializer and dependent undeclared i/syntax diagnostics. Exact command: mkdir -p build/cron-20261024-frontier-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-frontier-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. Capture: build/cron-20261024-frontier-reprobe/probe.log.

The Hermes coding subagent provider was unavailable (Anthropic credentials missing); one authenticated Codex CLI fallback lane (codex-cli 0.153.4) followed strict TDD. New scripts/vc6-typeobject-type-new-descriptors-index-c89.test.py failed against unchanged source (RED exit 1; expected opening-local assertion), and a byte comparison confirmed cpython/Objects/typeobject.c remained unchanged before implementation. The sole production edit hoists Py_ssize_t i; into type_new_descriptors()'s opening declarations and reuses it in the loop initializer, preserving the loop bounds, increment, body, and behavior. Focused GREEN passed (exit 0); all 56 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). Preservation verification confirmed all 4,871 other snapshotted pre-existing paths byte-identical. Scoped nested and outer git diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261024-after-type-new-descriptors/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-after-type-new-descriptors/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-type-new-descriptors/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; the former line-3025 diagnostics cleared. First remaining stable blocker advances to typeobject.c(3185), C2275 PyObject / C2065 new_slots, in type_new_slots_impl(); untouched. Subsequent diagnostics also remain untouched. Capture: build/cron-20261024-after-type-new-descriptors/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-descriptors-index-c89.test.py, and this status entry. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only type_new_slots_impl()'s new_slots declaration. No completed port is claimed.

`type_new_staticmethod()` `static_func` C89 declaration slice (frontier advances)

Date: 2026-10-24 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing modified and untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD and did not edit this status file. Before implementation, all 53 existing scripts/vc6-typeobject-*.test.py fixtures passed. New scripts/vc6-typeobject-type-new-staticmethod-c89.test.py failed against unchanged source (RED exit 1; expected assertion that static_func must be in the opening declaration block; cmp verified the C file unchanged). Minimal production edit hoists PyObject *static_func; into type_new_staticmethod()'s initial local declarations and changes the later initialized declaration to assignment at the same call point. Focused test passed (exit 0); all 54 typeobject fixtures passed (exit 0). Delegated diff -u verified only that declaration/assignment delta in cpython/Objects/typeobject.c; outer git diff --check and nested git -C cpython diff --check -- Objects/typeobject.c both exited 0.

Forced-fresh pre-change VC6/Wine command: mkdir -p build/cron-20261024-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-frontier/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors were typeobject.c(2973) C2275 (PyObject) and C2065 (static_func). After-change forced-fresh command: mkdir -p build/cron-20261024-after-staticmethod/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-after-staticmethod/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-staticmethod/probe.log 2>&1 — exit 2; same summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The staticmethod diagnostics cleared. First remaining stable blocker is now typeobject.c(3001) C2275 (PyObject) and C2065 (method) in the following classmethod helper; left untouched. Full captures are in the two paths above.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-staticmethod-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only the type_new_classmethod() method declaration. No completed port is claimed.

`type_new_set_doc()` `tp_doc` C89 declaration slice (frontier advances)

Date: 2026-10-23 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing dirty/untracked changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh before-change VC6/Wine probe command: mkdir -p build/cron-20261023-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261023-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics were typeobject.c(2946) C2143 (late char *tp_doc) and C2065 tp_doc at 2947. Capture: build/cron-20261023-reprobe/probe.log.

One focused Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD and did not edit this status file. New scripts/vc6-typeobject-type-new-set-doc-tp-doc-c89.test.py failed against unchanged production source (RED exit 1, expected opening-declaration assertion). The minimal production change declares char *tp_doc; with opening locals and changes the later initialized declaration into tp_doc = (char *)PyObject_Malloc(size); at the same point, preserving allocation order/control flow. Initial regression run found two directly related fixtures expecting the old layout; narrowly updated only those expectations. First corrected full rerun still exposed a mistaken extra size token in the size fixture's normalized expectation; removed only that extra token, then reran cleanly. The focused test passed (exit 0); all 53 scripts/vc6-typeobject-*.test.py tests passed (exit 0). git diff --check and git -C cpython diff --check -- Objects/typeobject.c both exited 0. Baseline snapshot check from the coding lane confirmed the other 123 pre-existing outer-repository files were unchanged before the two necessary fixture updates; PORT_STATUS remained untouched until this record.

After-change forced-fresh probe: mkdir -p build/cron-20261023-after-tp-doc/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261023-after-tp-doc/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-after-tp-doc/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former type_new_set_doc() diagnostics at 2946/2947 cleared. First remaining stable errors are in the next function type_new_staticmethod() at typeobject.c(2973), C2275 PyObject and C2065 static_func; left untouched. Capture: build/cron-20261023-after-tp-doc/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-type-new-set-doc-tp-doc-c89.test.py; narrowly updated scripts/vc6-typeobject-type-new-set-doc-doc-str-c89.test.py and scripts/vc6-typeobject-type-new-set-doc-size-c89.test.py; and this status entry. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm, then isolate only type_new_staticmethod()'s static_func declaration family. No completed port is claimed.

`type_new_set_doc()` size declaration C89 slice (frontier advances)

Date: 2026-10-20 UTC. The requested /home/ubuntu/projects/python-win9x checkout is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython 3.11.16/MSVC6 legacy reference. Preserved prior local work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A forced-fresh pre-change VC6/Wine probe disproved the older _blake2/blake2s_impl.c frontier: that source compiled. Exact command: mkdir -p build/cron-20261023-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261023-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-reprobe/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0. First stable diagnostics were typeobject.c(2944) C2275/C2146/C2065 for late Py_ssize_t size; capture: build/cron-20261023-reprobe/probe.log.

One focused coding-delegation attempt stopped because the existing doc_str regression expected the late initialized size declaration. Strict TDD was maintained: new scripts/vc6-typeobject-type-new-set-doc-size-c89.test.py failed against unchanged production source (RED exit 1; expected missing opening declaration). Updated only the directly related scripts/vc6-typeobject-type-new-set-doc-doc-str-c89.test.py expectation to require the hoisted declaration and its same-point assignment, then changed only cpython/Objects/typeobject.c: added Py_ssize_t size; to type_new_set_doc()'s opening declarations and changed Py_ssize_t size = strlen(doc_str) + 1; to size = strlen(doc_str) + 1; at the original execution point. Initial post-edit regression run exposed the old test's expected body needing that same narrow update; after updating it, all 52 scripts/vc6-typeobject-*.test.py tests passed (exit 0), including both directly related tests. git diff --check and git -C cpython diff --check -- Objects/typeobject.c each exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261023-after-size/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261023-after-size/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-after-size/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former size diagnostics cleared. First remaining stable diagnostic is typeobject.c(2946) C2143, followed by undeclared tp_doc at 2947: the later declaration char *tp_doc now follows the size assignment. Left untouched as a distinct declaration family. Capture: build/cron-20261023-after-size/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-type-new-set-doc-size-c89.test.py; narrowly updated scripts/vc6-typeobject-type-new-set-doc-doc-str-c89.test.py; and this status entry. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: fresh confirm, then isolate only the type_new_set_doc() tp_doc declaration. No completed port is claimed.

`type_new_set_doc()` doc_str C89 declaration slice (frontier advances)

Date: 2026-10-22 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine probe command: mkdir -p build/cron-20261022-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261022-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-reprobe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled. First stable diagnostics were typeobject.c(2937) C2143/C2065 for late const char *doc_str, with related declarations downstream. Exact capture: build/cron-20261022-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) applied strict TDD. New scripts/vc6-typeobject-type-new-set-doc-doc-str-c89.test.py failed against unchanged source as expected (RED exit 1). The only production change hoists const char *doc_str; to type_new_set_doc()'s opening declarations and changes the later initialized declaration to assignment at the original conversion point. Focused GREEN passed; all 51 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). Preservation verification confirmed all 121 pre-existing dirty/untracked paths byte-identical; only the intended production source and new test differ. git diff --check and git -C cpython diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261022-after-doc-str/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261022-after-doc-str/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-after-doc-str/probe.log 2>&1 — exit 2. Former doc_str errors cleared; first diagnostics advance to typeobject.c(2944) C2275/C2146/C2065 for the distinct late Py_ssize_t size declaration in the same function; it remains untouched. Capture: build/cron-20261022-after-doc-str/probe.log. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-set-doc-doc-str-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then isolate only the type_new_set_doc() size declaration family. No completed port is claimed.

Diagnostics-only: `type_new_set_module()` module local confirmed; regression fixture conflict

Date: 2026-10-21 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved existing work; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced VC6/Wine probe disproved the older _blake2/blake2s_impl.c frontier: _blake2/blake2s_impl.c compiled successfully and the first stable diagnostic family is cpython/Objects/typeobject.c(2872), C2275 (PyObject illegal use as an expression) and C2065 (module undeclared), in type_new_set_module(). Exact command: mkdir -p build/cron-20261021-refresh/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-refresh/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First diagnostic capture: build/cron-20261021-refresh/probe.log (first errors at log lines 1266/1268). Baseline tag and commit commands both verified the values above.

One focused coding lane was attempted: Hermes delegation was unavailable because the configured Anthropic provider has no credentials; authenticated codex-cli 0.153.4 then inspected the target. It found the existing untracked regression scripts/vc6-typeobject-type-new-set-module-globals-c89.test.py asserts the entire function body including the separate late module declaration. The coding lane stopped before edits to preserve all pre-existing local work. No production code or tests changed; no TDD test was run, and the frontier was not advanced. This record is the only path changed by this run. Next action: a narrowly scoped strict-TDD slice may update that directly affected regression expectation together with a new/focused test and the module declaration, while preserving unrelated local changes; alternatively remain diagnostics-only if safe isolation cannot be guaranteed. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. No completed port is claimed.

`type_new_set_module()` globals declaration C89 slice (frontier advances)

Date: 2026-10-21 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the legacy-toolchain CPython 3.11.16/MSVC6 reference before work. Preserved all pre-existing changes; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh pre-change forced VC6/Wine probe confirmed the recorded type_new_set_module() globals frontier. Command: mkdir -p build/cron-20261021-frontier-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-frontier-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-frontier-reprobe/probe.log 2>&1 — exit 2; first stable diagnostics typeobject.c(2866) C2275/C2065 for late PyObject *globals; distinct module declaration diagnostics at 2871 follow.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD. New scripts/vc6-typeobject-type-new-set-module-globals-c89.test.py failed against unchanged source (RED exit 1, expected opening-declaration assertion). The sole production change hoists PyObject *globals; into the opening block and converts its later initialized declaration into assignment at the same evaluation point. The distinct module declaration and all control flow remain unchanged. Focused GREEN passed; all 49 scripts/vc6-typeobject-*.test.py regressions passed. Snapshot verification confirmed the exact source delta and all 4,864 other snapshotted pre-existing files unchanged. Outer and nested git diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261021-after-globals/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-after-globals/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-after-globals/probe.log 2>&1 — exit 2. The former globals diagnostics cleared; first remaining diagnostic family advances to typeobject.c(2872) C2275/C2065 for the separate PyObject *module declaration, left untouched. Additional later diagnostics begin at line 2936. Probe output is captured in the two directories above. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-set-module-globals-c89.test.py, and this status entry. Next frontier: force-fresh confirm and handle only the separate module declaration family. No completed port is claimed.

Diagnostics-only: `type_new_set_module()` globals frontier confirmed; coding delegation unavailable

Date: 2026-10-20 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the active-profile CPython 3.11.16/Win9x/MSVC6 reference before acting. Preserved all existing modifications and untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change probe command: mkdir -p /home/ubuntu/r build/cron-20261020-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261020-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics are typeobject.c(2866) C2275 (PyObject illegal use as expression) and C2065 (globals undeclared), then separate C2275/C2065 at line 2871 for module. Full capture: build/cron-20261020-current-reprobe/probe.log.

Attempted the required single focused coding-subagent lane, but delegation could not start: configured Anthropic provider has no credentials. Following the delegation fallback guidance, did not substitute an unrequested/unauthenticated external coding CLI. Consequently no implementation or tests were changed; do not treat the frontier as advanced. This run is diagnostics-only. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Files changed this run: PORT_STATUS.md only. Next frontier: strict-TDD fix only the globals declaration in type_new_set_module() when an approved coding lane is available; leave the separate module declaration untouched. No completed port is claimed.

`type_new_alloc()` heap-type local C89 slice (frontier advances)

Date: 2026-10-20 06:08 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing modified/untracked work; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded type_new_alloc() frontier was re-probed before changes. Exact command: mkdir -p build/cron-20261020-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261020-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261020-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors: typeobject.c(2802) C2275 (PyHeapTypeObject) and C2065 (et), with subsequent C2223 consequences. Capture: build/cron-20261020-reprobe/probe.log.

One focused Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD, preserving pre-existing changes and not editing this status file. New scripts/vc6-typeobject-type-new-alloc-heap-type-c89.test.py failed against unchanged production source (RED exit 1; expected opening-declaration assertion). The single production change declares PyHeapTypeObject *et; in the opening local block and assigns the cast to et at its original point after the type == NULL check, preserving allocation and validation order. Focused regression passed (exit 0); all 48 scripts/vc6-typeobject-*.test.py tests passed (suite exit 0). Independent snapshot/diff verification confirmed the complete source delta is just this declaration/assignment adjustment, the only new path is the focused test, and all 247 other pre-existing modified/untracked files remained byte-identical. Outer and nested git diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261020-after-type-new-alloc/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261020-after-type-new-alloc/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261020-after-type-new-alloc/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; typeobject.c compiled. The former line-2802 diagnostics are gone. First remaining stable errors advance to typeobject.c(2866) C2275/C2065 for late PyObject *globals in type_new_set_module(), then the distinct module declaration at 2871; both untouched. Capture: build/cron-20261020-after-type-new-alloc/probe.log. Wine emitted a long AF_UNIX socket-path warning because the repository-local runtime path exceeds 108 bytes; compilation continued through all 108 units and captured diagnostics. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-alloc-heap-type-c89.test.py, and this status entry. Next frontier: isolate only type_new_set_module()'s first globals declaration at line 2866 after fresh confirmation. No completed port is claimed.

`type_new_slots_impl()` C89 local declaration slice (frontier advances)

Date: 2026-10-20 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before work. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. The earlier recorded _blake2/blake2s_impl.c frontier was stale: forced-fresh probing compiled that file and first stopped at type_new_slots_impl() in cpython/Objects/typeobject.c line 2746, C2275 on late PyObject *new_slots. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) used strict TDD. New scripts/vc6-typeobject-type-new-slots-impl-c89.test.py failed against unchanged source (RED exit 1, expected opening-declaration assertion); a byte comparison confirmed cpython/Objects/typeobject.c unchanged before implementation. The minimal source change hoists PyObject *new_slots; into the function's opening declaration block and changes the later initialized declaration to assignment at its original evaluation point. The focused test passed, and all 47 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). The delegation snapshot check confirmed all 246 other pre-existing dirty/untracked files remained byte-identical. Nested and outer scoped git diff --check both exited 0.

Forced-fresh before-change command: mkdir -p build/cron-run-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-run-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-run-frontier/probe.log 2>&1 — actual probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic: typeobject.c(2746) C2275 (PyObject illegal use as an expression). Capture: build/cron-run-frontier/probe.log.

After-change forced-fresh command: mkdir -p build/cron-run-after-slots-impl/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-run-after-slots-impl/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-run-after-slots-impl/probe.log 2>&1 — actual probe exit 2; same summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The line-2746 diagnostics are gone; first remaining blocker advances to typeobject.c(2802) C2275 (PyHeapTypeObject), left untouched. Capture: build/cron-run-after-slots-impl/probe.log. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-slots-impl-c89.test.py, and this status record. Next frontier: force-fresh confirm and isolate only the current typeobject.c(2802) declaration family. No completed port is claimed.

`type_new_slots_bases()` C89 loop-index slice (frontier advances)

Date: 2026-10-19 23:32 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before acting. Preserved all existing outer and detached CPython work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior recorded type_new_copy_slots() frontier had already cleared. Forced-fresh VC6/Wine probe confirmed _blake2/blake2s_impl.c compiled and the first current blocker was type_new_slots_bases() line 2698: C2143 on the C99 for (Py_ssize_t i = 0; ...) declaration. The first attempted invocation did not run because its log directory had not been created (redirection exit 1); retried with the capture directory present. Successful pre-change command: mkdir -p /home/ubuntu/r build/cron-20261019-fresh-frontier; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-fresh-frontier/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. Capture: build/cron-20261019-fresh-frontier/probe.log.

One authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD, without touching status or committing. New scripts/vc6-typeobject-type-new-slots-bases-index-c89.test.py failed against the unchanged production source (RED exit 1, expected assertion that the loop index must be declared before statements). The minimal source change declares Py_ssize_t i; after nbases and reuses it in for (i = 0; ...), preserving bounds, body, and flow. Parent independently reran the focused regression (exit 0) and all 45 scripts/vc6-typeobject-*.test.py tests (exit 0). git -C cpython diff --check -- Objects/typeobject.c and a trailing-whitespace/newline check on the new test passed (exit 0). The delegated lane's git diff --no-index --check for the untracked test returned 1 because --no-index signals file difference; no whitespace diagnostics were emitted. Source comparison to its immediate pre-lane snapshot showed only the intended function-local C89 delta.

After-change forced-fresh command: mkdir -p /home/ubuntu/r build/cron-20261019-after-slots-bases-index; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-after-slots-bases-index/probe.log 2>&1 — probe exit 2; same summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-2698 loop errors are gone. First remaining diagnostics are typeobject.c(2705) C2143 on the distinct PyTypeObject *base late declaration, then C2065 base at 2708 and consequent C2223 diagnostics at 2708/2713; left untouched. Capture: build/cron-20261019-after-slots-bases-index/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-slots-bases-index-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only the type_new_slots_bases() base declaration at line 2705. No completed port is claimed.

`type_new_visit_slots()` C89 loop-index slice (frontier advances)

Date: 2026-10-19 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all existing local changes. No reset, clean, stash, discard, commit, push, or publication. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Hermes coding delegation was unavailable (Anthropic credentials missing). One authenticated Codex CLI lane inspected the actual function and stopped without edits because it found no preexisting loop-index local to safely reuse. A fresh forced VC6/Wine probe reconfirmed the frontier at type_new_visit_slots() line 2583: C2143 on for (Py_ssize_t i...), cascading C2065 i; _blake2/blake2s_impl.c compiled. Probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. Capture: build/cron-current-reprobe/probe.log.

Implemented the narrow C89 fix directly under strict TDD. New regression scripts/vc6-typeobject-type-new-visit-slots-index-c89.test.py was created and run against unchanged production source (RED exit 1 at the expected missing function-scope i assertion). The minimal production edit declares Py_ssize_t i; with type_new_visit_slots() locals and changes only the loop initializer to i = 0, preserving bound, increment, body, and behavior. Focused regression passed (exit 0); all 43 scripts/vc6-typeobject-*.test.py tests passed (suite exit 0). Nested git diff --check -- Objects/typeobject.c and outer check for the new regression both exited 0.

After-change forced-fresh command: mkdir -p build/cron-after-type-new-visit-slots/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-after-type-new-visit-slots/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-after-type-new-visit-slots/probe.log 2>&1 — exit 2; same summary total=109 compiled=108 cached=0 skipped=0. The former line-2583 errors are gone; first remaining error is typeobject.c(2630) C2275/C2146/C2065 for the distinct Py_ssize_t j declaration in type_new_copy_slots(), with a separate loop-index error there. Full capture: build/cron-after-type-new-visit-slots/probe.log. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-visit-slots-index-c89.test.py, and this status entry. Next frontier: force-fresh confirm and isolate only the type_new_copy_slots() line-2630 j declaration family. No completed port is claimed.

`best_base()` `base_i` C89 declaration slice (frontier advances)

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the profile CPython Win9x/MSVC6 reference before work. Preserved all pre-existing local changes; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A forced-fresh pre-change VC6/Wine probe confirmed the status-recorded base_i frontier. Exact command: mkdir -p build/cron-20261019-frontier-refresh/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-frontier-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-frontier-refresh/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors were typeobject.c(2226) C2275 (PyTypeObject) and C2065 (base_i), followed by C2223 consequences at 2228/2235. Source inspection confirmed this declaration belongs to best_base(), not mro_check().

Hermes coding delegation could not start because Anthropic credentials are unavailable. One authenticated Codex CLI lane (codex-cli 0.153.4, codex exec --sandbox workspace-write --ephemeral) applied strict TDD. New scripts/vc6-typeobject-best-base-base-i-c89.test.py failed against unchanged production source (RED exit 1, expected declaration-placement assertion); cmp against the pre-edit typeobject.c snapshot exited 0. The single production change declares PyTypeObject *base_i; at the beginning of the loop body and assigns the cast only after successful PyType_Check(base_proto), preserving validation and cast timing. The focused test passed (exit 0); all 42 scripts/vc6-typeobject-*.test.py tests passed individually (suite exit 0). A SHA-256 preservation check confirmed that only cpython/Objects/typeobject.c and the new regression test differ from the pre-lane snapshot; every other existing file, including this status file, was byte-identical. Scoped nested and outer git diff --check both exited 0. No commit or publication.

After-change forced-fresh probe command: mkdir -p build/cron-20261019-after-best-base/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-after-best-base/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-after-best-base/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. The original best_base() errors at lines 2226/2228/2235 are gone; first remaining typeobject.c diagnostics are at line 2583 (C2143/C2065 loop-index family), followed by separate C89 declaration families at lines 2629 and beyond. The compiler capture also logs a too-long repository-local Wine socket path warning during some units, but completes 108 compilations and the typeobject.c diagnostics are reliable. Full capture: build/cron-20261019-after-best-base/probe.log. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: force-fresh isolate the first line-2583 defect family. No completed port is claimed.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-best-base-base-i-c89.test.py, and this status entry.

Current frontier refreshed: `mro_check()` `base_i` declaration

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Before diagnostics, read this status, README.md, and the profile CPython Win9x/MSVC6 reference. Preserved all pre-existing dirty/untracked work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded mro_check() base_i frontier remains current. Two forced-fresh VC6/Wine invocations ran with VC6_FRONTIER_FORCE=1 and repository-local XDG_RUNTIME_DIR; both exited 2 during compilation. In both, _blake2/blake2s_impl.c had already compiled, and first stable diagnostics were typeobject.c(2226) C2275 (PyTypeObject) and C2065 (base_i), followed by C2223 consequences at lines 2228/2235. Captures: build/cron-20261019-blake2-reprobe/probe.log and build/cron-20261019-basei-red/probe.log. Summary in each: total=109 compiled=108 cached=0 skipped=0.

Implementation was not started in this run; no source or regression test was changed. The available compiler-probe frontier is precisely this C89 base_i declaration within mro_check(). Next action: one focused strict-TDD slice for base_i only, using the single-lane coding delegation workflow. Current state is compiler-probe progress only: there is no linked pythoncore/python.exe, no Wine interpreter execution, and no real Windows 98 SE execution. No completed port is claimed.

`mro_check()` base local C89 slice (frontier advances)

Date: 2026-10-19 UTC. Requested checkout /home/ubuntu/projects/python-win9x was absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261019-mro-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-mro-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-mro-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors were typeobject.c(2072) C2275 (PyTypeObject) and C2065 (base), followed by C2223 at line 2078.

One focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write/ephemeral) performed a strict-TDD slice after Hermes delegation was unavailable (Anthropic credentials absent). New scripts/vc6-typeobject-mro-check-c89.test.py failed against unchanged source as expected (RED exit 1), asserting that base must be declared before statements in the loop. The only production change declares PyTypeObject *base; before the type-check and assigns (PyTypeObject*)obj after successful PyType_Check(obj), preserving cast/validation timing. Focused test passed; all 41 scripts/vc6-typeobject-*.test.py tests passed. Scoped nested and outer git diff --check passed. Preservation verification reports all 240 other pre-existing dirty/untracked files byte-identical; exact delta and checks are captured under build/cron-20261019-after-mro-check/.

After-change forced-fresh command: mkdir -p build/cron-20261019-after-mro-check/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-after-mro-check/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-after-mro-check/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-2072 errors are gone; first remaining diagnostics advance to typeobject.c(2226) C2275/C2065 for base_i, with C2223 consequences at lines 2228/2235. Full capture: build/cron-20261019-after-mro-check/probe.log. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter run, or real Windows 98 SE execution. Files changed by the slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-mro-check-c89.test.py, and this status entry. Next frontier: isolate only the verified base_i declaration family after fresh confirmation. No completed port is claimed.

Diagnostics-only: recorded MRO frontier is stale; current first blocker is `mro_check()`

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing local work; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded mro_implementation() line-2072 frontier was not current: that line is now in mro_check(), and the declarations at mro_implementation() lines 1964 and 2015 are block-leading declarations, not the first current blocker. Existing fresh captures build/cron-20261019-verify-frontier/probe.log and build/cron-20261019-after-result/probe.log both showed the first stable diagnostic at typeobject.c(2072), C2275 (PyTypeObject) and C2065 (base), followed by cascading C2223 at 2078. The requested coding delegation provider was unavailable (no Anthropic credentials); its authenticated Codex CLI fallback independently confirmed that the blocker is outside the requested function. No source or regression test was changed.

The exact proposed after-change probe command first failed before compilation with exit 1 due Wine socket setup (sock_init: ERROR in sock_check_pollhup(); wineserver lock creation returned read-only filesystem). Retried with a short repository-local runtime directory. Exact successful fresh diagnostic command: mkdir -p build/cron-20261019-final-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-final-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-final-reprobe/probe.log 2>&1 — exit 2. The source-list frontier summary is total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics remain typeobject.c(2072) C2275/C2065 for PyTypeObject *base in mro_check(), with downstream C2223; subsequent independent diagnostics include typeobject.c(2225). Full capture: build/cron-20261019-final-reprobe/probe.log.

All 40 scripts/vc6-typeobject-*.test.py regressions passed individually (exit 0), captured in build/codex-mro-diagnostics/typeobject-tests.log. Preservation snapshot verified all 241 pre-existing modified/untracked files remained byte-identical before this status entry. Files changed by this run: this PORT_STATUS.md record only; no compatibility code or tests. Next step is a new narrowly scoped C89 slice for the actual mro_check() line-2072 declaration, after re-scoping task to that function; do not modify the unrelated mro_implementation() declarations. This remains compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. No completed port is claimed.

`mro_implementation()` slow-path result declaration C89 slice (frontier advances)

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved pre-existing work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified unchanged: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh before-change VC6/Wine probe confirmed the prior population-loop index fix and identified mro_implementation() line 2019 PyObject *result declaration as the first stable blocker. Exact command: mkdir -p build/cron-20261019-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-current-reprobe/probe.log 2>&1 — exit 2. _blake2/blake2s_impl.c compiled; initial diagnostic family was C2275/C2065 at line 2019 (PyObject/result). Full capture: build/cron-20261019-current-reprobe/probe.log.

One focused Codex CLI lane (codex-cli 0.153.4, codex exec --sandbox workspace-write --ephemeral) followed strict TDD. New scripts/vc6-typeobject-mro-implementation-result-c89.test.py failed against unchanged production source (RED exit 1, expected missing function-entry declaration assertion); the source remained unchanged before RED. The only production edit adds PyObject *result; to mro_implementation()'s opening declarations and changes the later initialized declaration to result = PyList_New(1); at its original evaluation point. The fast-path tuple allocation remains distinct and unchanged. The initial all-typeobject regression run exposed six tests asserting the prior declaration block; their fixtures were narrowly updated to include the new hoisted local and the updated allocation expression. Final focused test passed; all 40 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Preservation verification confirmed exactly the intended source delta and all 239 other prior modified/untracked files byte-identical, including the prior contents of PORT_STATUS.md.

After-change forced-fresh probe: mkdir -p build/cron-20261019-after-result/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-after-result/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-after-result/probe.log 2>&1 — exit 2. The line-2019 result diagnostics are gone; first remaining diagnostics advance to typeobject.c(2072) C2275 (PyTypeObject) and C2065 (base), with consequent C2223 at line 2078. Full capture: build/cron-20261019-after-result/probe.log. Scoped nested and outer git diff --check both exited 0. No pythoncore/python.exe link, Wine interpreter run, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed in this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-mro-implementation-result-c89.test.py; narrowly adjusted six directly related MRO implementation tests (bases, fast-path-index, index, merge-index, n, and to-merge); and this status entry. Next frontier: force-fresh confirm, then isolate only the typeobject.c(2072) base declaration family. No completed port is claimed.

`mro_implementation()` population-loop C89 index slice (frontier advances)

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified unchanged: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior recorded frontier was force-fresh confirmed. Before-change command: mkdir -p build/cron-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-reprobe/probe.log 2>&1 — exit 2. _blake2/blake2s_impl.c compiled; first stable diagnostic was typeobject.c(2013) C2143 on the C99 for (Py_ssize_t i = 0; ...) population-loop initializer. The pre-existing function-scope i permits reusing the index. One focused authenticated Codex CLI lane (codex exec, workspace-write/ephemeral; configured Anthropic delegation unavailable) followed strict TDD. New scripts/vc6-typeobject-mro-implementation-population-index-c89.test.py failed against unchanged production source (RED exit 1 with its expected loop-index assertion); cmp against the pre-edit typeobject.c snapshot exited 0. The sole production edit changes the loop initializer to for (i = 0; ...), preserving loop bounds/body and initialization. All 39 scripts/vc6-typeobject-*.test.py tests passed (exit 0). A preservation check verified all 238 other pre-existing modified/untracked files unchanged and typeobject.c differs only by the intended one-line edit.

After-change forced-fresh probe: mkdir -p build/cron-after-mro-population-index/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-after-mro-population-index/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-after-mro-population-index/probe.log 2>&1 — exit 2. _blake2/blake2s_impl.c compiled; former line-2013 C2143 is gone. First remaining stable diagnostics advance to typeobject.c(2019) C2275/C2065 for the separate PyObject *result declaration; untouched. Full capture: build/cron-after-mro-population-index/probe.log. git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-mro-implementation-population-index-c89.test.py exited 0.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-mro-implementation-population-index-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirmation and isolate only the typeobject.c(2019) result declaration. No completed port is claimed.

MRO implementation merge-loop index: fresh confirmation only; coding lane unavailable

Date: 2026-10-18 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and searched for the specified CPython Win9x/MSVC6 reference; that file was unavailable in the workspace. Preserved all existing tracked modifications and untracked files. No reset, clean, stash, discard, commit, push, or publication. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded to_merge fix remains effective. A forced-fresh VC6/Wine probe compiled _blake2/blake2s_impl.c and advanced to the distinct C99 loop-index declaration at typeobject.c(2013) in mro_implementation(). Command: mkdir -p build/cron-current-refresh/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-refresh/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; first diagnostic family C2143 at line 2013, with cascading C2143/C2059; next independent error at line 2019 (result) left untouched. Full capture: build/cron-current-refresh/probe.log.

One focused implementation delegation was attempted but the configured Anthropic provider could not start due to missing credentials. The authenticated Codex CLI was started as the single fallback lane; it did not provide results during this run, so no production or test files were changed. Independently ran all 37 scripts/vc6-typeobject-*.test.py tests; all passed (exit 0). Nested git diff --check -- Objects/typeobject.c passed (exit 0).

Files changed this run: PORT_STATUS.md only. This is diagnostic progress; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: strict-TDD isolated C89 fix for only the mro_implementation() line-2013 loop index, using the actual compiler evidence above. No completed port is claimed.

`mro_implementation()` `to_merge` C89 declaration slice (frontier advances)

Date: 2026-10-18 UTC. The instructed checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved pre-existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified unchanged at v3.11.16, 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced probe confirmed the recorded mro_implementation() frontier: _blake2/blake2s_impl.c compiled; first stable errors were typeobject.c(2006) C2275/C2065/C2100 on late PyObject **to_merge. Before-change command: mkdir -p build/cron-current-refresh/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-refresh/probe.log 2>&1 — probe exit 2, summary total=109 compiled=108 cached=0 skipped=0.

One focused Codex CLI implementation lane used strict TDD. New scripts/vc6-typeobject-mro-implementation-to-merge-c89.test.py failed against unchanged production source (RED exit 1; expected opening-declaration assertion). The only production change adds PyObject **to_merge; to the opening declaration block and turns its allocation declaration into assignment at its original point after duplicate validation. Allocation/error handling order is unchanged. Four existing focused MRO declaration tests required narrow expected-block updates for the additional hoisted local; their semantic assertions were retained. Focused test and all 37 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). Applicable outer and nested git diff --check passed (exit 0).

After-change forced-fresh command: mkdir -p build/cron-after-to-merge/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-after-to-merge/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-after-to-merge/probe.log 2>&1 — probe exit 2, same summary; the former line-2006 errors are gone. First remaining diagnostic is C2143 at typeobject.c(2013) for a separate C99 loop index, left untouched. Full capture: build/cron-after-to-merge/probe.log. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-mro-implementation-to-merge-c89.test.py; narrowly adjusted scripts/vc6-typeobject-mro-implementation-bases-c89.test.py, scripts/vc6-typeobject-mro-implementation-fast-path-index-c89.test.py, scripts/vc6-typeobject-mro-implementation-index-c89.test.py, and scripts/vc6-typeobject-mro-implementation-n-c89.test.py; and this status entry. Next frontier: force-fresh confirmation, then isolate only the typeobject.c(2013) loop-index family. No completed port is claimed.

Date: 2026-10-18 UTC. The requested checkout /home/ubuntu/projects/python-win9x does not exist; used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved pre-existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced probe established the prior _blake2/blake2s_impl.c frontier had advanced: that file compiled, and the first current stable blocker was the second C99 loop-index declaration in mro_implementation() at typeobject.c(1985), C2143. One focused Codex CLI implementation lane (codex-cli 0.153.4, authenticated ChatGPT, --sandbox workspace-write --ephemeral) followed strict TDD after Hermes delegation was unavailable (Anthropic credentials missing). New regression scripts/vc6-typeobject-mro-implementation-fast-path-index-c89.test.py failed against unchanged source (RED exit 1, expected C89 declaration assertion); cmp of cpython/Objects/typeobject.c against its pre-edit snapshot exited 0. The minimal production change reuses existing function-scope i in the single-base fast-path loop, preserving initialization timing, bounds, increment, and body. No other blocker was changed.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change command: mkdir -p build/cron-20261018-latest-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-latest-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-latest-reprobe/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First compiler diagnostic: typeobject.c(1985) C2143 on the second loop-index declaration. Capture: build/cron-20261018-latest-reprobe/probe.log.
TDD RED: new focused test before production edit — exit 1, expected assertion that fast-path loop must reuse function-scope i; source cmp against snapshot — exit 0.
GREEN/regressions: focused test — exit 0. for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; ...; done — exit 0; all 36 typeobject tests passed.
After-change forced-fresh command: mkdir -p build/cron-20261018-after-mro-fast-index/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-mro-fast-index/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-mro-fast-index/probe.log 2>&1 — exit 2; same summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-1985 diagnostics are gone. First remaining diagnostic is typeobject.c(2006) C2275/C2065/C2100 on the separate PyObject **to_merge declaration; untouched. Capture: build/cron-20261018-after-mro-fast-index/probe.log.
Preservation verification: SHA-256/mode snapshot confirmed exactly the production source and new focused regression changed; all 11,374 other pre-existing files remained byte-identical, including this status file, at implementation verification. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c (one loop-index declaration removal/reuse), new scripts/vc6-typeobject-mro-implementation-fast-path-index-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then isolate only the to_merge declaration at typeobject.c(2006). No completed port is claimed.

First mro_implementation loop-index C89 slice

Date: 2026-10-18 UTC. Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and the active-profile python-3-win9x-msvc6.md reference. Preserved existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded MRO declaration frontier required fresh confirmation. The first attempt used an overly long project-local Wine runtime path and exited 2 before compiler diagnostics (socket path ... exceeds 108 bytes); the successful fresh retry used XDG_RUNTIME_DIR="$PWD/build/r1/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/r1/probe.log 2>&1 and exited 2 at mro_implementation() line 1960: C2143 for the first C99 loop index declaration for (Py_ssize_t i = 0; ...). _blake2/blake2s_impl.c passed; summary total=109 compiled=108 cached=0 skipped=0. A single authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI) implemented only this frontier using strict TDD. New focused test was run against unchanged production source and failed as expected (RED exit 1); production byte comparison was unchanged (exit 0). The minimal source change hoisted Py_ssize_t i; to mro_implementation()'s opening declarations and retained i = 0 in the original loop initializer. Existing declaration-order expectations in two directly related tests were narrowly updated. The focused test and all 35 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). Snapshot verification covered 235 pre-existing modified/untracked files and passed; exact production delta was independently compared and passed. Root and nested git diff --check both returned 0. A supplementary git diff --no-index --check /dev/null <new test> returned 1 because --no-index signals the new-file difference despite empty diagnostics; do not interpret that as a whitespace failure.

After-change forced-fresh probe command: mkdir -p build/r2/runtime; XDG_RUNTIME_DIR="$PWD/build/r2/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/r2/probe.log 2>&1 — exit 2, summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-1960 diagnostics are gone. First remaining stable diagnostic family advances to mro_implementation() line 1985, the second C99 loop-index declaration (for (Py_ssize_t i = 0; i < k; i++)); left untouched. Full capture: build/r2/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-mro-implementation-index-c89.test.py; narrowly updated scripts/vc6-typeobject-mro-implementation-bases-c89.test.py and scripts/vc6-typeobject-mro-implementation-n-c89.test.py; and this status entry. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm, then isolate only the second mro_implementation() loop declaration at line 1985. No completed port is claimed.

Diagnostics-only run: MRO declaration frontier confirmed; implementation delegation unavailable

Date: 2026-10-18 UTC. Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and attempted the relevant legacy-toolchain reference lookup; references/python-3-win9x-msvc6.md was unavailable in the workspace. Preserved all existing dirty/untracked work. No reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The old _blake2/blake2s_impl.c frontier is not active: forced-fresh MSVC600/Wine probe compiled _blake2/blake2s_impl.c and advanced to typeobject.c(1958). Probe command: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First diagnostics: C2275/C2146/C2065 at line 1958 for late Py_ssize_t n; subsequent C2143/C2065/C2059 at line 1959 are the separate C99 loop index i. Additional later MRO errors remain untouched. Full capture: build/cron-20261018-current-reprobe/probe.log.

Attempted the required single focused coding delegation for only the first declaration family; delegation could not start because the configured Anthropic provider lacks credentials. No production or regression-test changes were made. Applicable regression diagnostics: all 33 scripts/vc6-typeobject-*.test.py passed (command loop exit 0). Baseline tag and commit rechecked unchanged. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed this run: PORT_STATUS.md only; compiler capture is under build/cron-20261018-current-reprobe/. Next frontier: perform one strict-TDD slice for only the typeobject.c(1958) n declaration when an approved coding delegation provider is available; leave i and subsequent families separate. No completed port is claimed.

vectorcall_maybe() C89 declaration slice (frontier advances)

Date: 2026-10-18 UTC. Existing checkout used: /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read the status, README, and the legacy-toolchain reference lookup was attempted but the file was unavailable at both expected locations (/home/ubuntu/.hermes/profiles/maxwell/skills/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md and workspace skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md). Existing dirty/untracked work preserved. No reset, clean, stash, discard, commit, push, or publication. CPython baseline: v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI, workspace-write/ephemeral) followed strict TDD. Fresh pre-edit forced probe reconfirmed vectorcall_maybe() as first stable frontier; _blake2/blake2s_impl.c compiled, followed by C2143 at typeobject.c(1719) and cascading declaration diagnostics. New focused test failed against unchanged production source (exit 1, expected opening declaration assertion). The only source change hoists int unbound, self, func, and retval; assignments remain at original evaluation points, and lookup failure control flow is unchanged. Focused GREEN and all 32 scripts/vc6-typeobject-*.test.py scripts passed (exit 0). The implementation lane independently compared the full typeobject.c against its pre-edit snapshot and confirmed its source delta is confined to this function.

Exact probe records:

Before: mkdir -p build/cron-20261018-reprobe-blake/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-reprobe-blake/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-reprobe-blake/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; first errors at typeobject.c(1719) C2143, then C2275/C2065 for declarations at 1720–1727. Capture: build/cron-20261018-reprobe-blake/probe.log.
After: mkdir -p build/cron-20261018-after-vectorcall-maybe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-vectorcall-maybe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-vectorcall-maybe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; all prior vectorcall_maybe() diagnostics cleared. First remaining errors advance to typeobject.c(1956) in a separate MRO declaration family (bases, n, C99 loop index); untouched. Capture: build/cron-20261018-after-vectorcall-maybe/probe.log.

No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE test occurred. This is compiler-probe progress only. Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-vectorcall-maybe-c89.test.py, and this status record. Next frontier: force-fresh confirm the first typeobject.c(1956) declaration family before selecting a single narrow follow-up. No completed port is claimed.

vectorcall_method() C89 declaration slice (frontier advances)

Date: 2026-10-18 UTC. Baseline: CPython v3.11.16 / 41388c9cb160d0886d5ca00d2e6c8782608a4549 (verified with git -C cpython describe --tags --exact-match HEAD and git -C cpython rev-parse HEAD, exit 0). Parent-reported before probe found first stable diagnostics at typeobject.c lines 1694+ (C2143 late declaration and cascade).

Strict TDD: added the focused script before changing source. python3 scripts/vc6-typeobject-vectorcall-method-c89.test.py returned exit 1 (RED), with AssertionError: vectorcall_method: all locals must precede assert in the opening declaration block (C89). Hoisted only this function's local declarations; initializer assignments remain at their original evaluation points, preserving executable statement order and behavior. The same command then returned exit 0 (GREEN), output vectorcall_method C89 declarations and unchanged assignment/evaluation/control flow: PASS.

for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done returned exit 0; all 31 scripts passed (27 PASS output lines; four silent successes). Exact changed paths: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-vectorcall-method-c89.test.py, and PORT_STATUS.md (this prepended record only). Post-slice forced-fresh probe command: mkdir -p build/cron-20261018-after-vectorcall-method; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-vectorcall-method/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0, _blake2/blake2s_impl.c compiled. The prior vectorcall_method() diagnostics cleared; first blocker now advances to vectorcall_maybe() at typeobject.c(1719) C2143, with cascade through its late local declarations. Capture: build/cron-20261018-after-vectorcall-method/probe.log. No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE runtime test occurred. This is compiler-probe progress only; no completed port is claimed.

Latest verified slice (`subtype_dealloc()` GC-branch `type_needs_decref`; frontier advances)

Date: 2026-10-18 01:28 UTC

Used existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before work. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior non-GC type_needs_decref fix was force-fresh confirmed; the first diagnostics were the distinct GC-branch C2143 at typeobject.c(1486) and consequent C2065 at line 1496. One focused authenticated Codex CLI lane (codex-cli 0.153.4, --sandbox workspace-write --ephemeral) used strict TDD. New scripts/vc6-typeobject-subtype-dealloc-gc-type-needs-decref-c89.test.py failed against unchanged production source (exit 1) because the GC path's declaration remained after statements. The only production change hoists int type_needs_decref; to subtype_dealloc()'s opening declaration block and changes the GC-path initialized declaration to assignment at the same original evaluation point. The non-GC branch, evaluation order, and control flow are unchanged. The agent corrected a test fixture's escaped-backslash issue, reran RED against a saved pre-edit source, and verified GREEN. All pre-existing paths and this status file were preserved during the delegated lane.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261018-gc-type-needs-decref-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-gc-type-needs-decref-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-gc-type-needs-decref-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(1486) C2143 and (1496) C2065 type_needs_decref. Capture: build/cron-20261018-gc-type-needs-decref-reprobe/probe.log.
TDD RED: focused regression against unchanged source — exit 1 on the expected missing function-entry declaration. GREEN: python3 scripts/vc6-typeobject-subtype-dealloc-gc-type-needs-decref-c89.test.py — exit 0.
Regressions: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" >/dev/null || exit 1; done — exit 0; all 29 passed. Scoped git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-subtype-dealloc-gc-type-needs-decref-c89.test.py — exit 0. An independent exact-source comparison verified only the declaration addition and its assignment split; no other previously dirty path was altered by the implementation lane.
After-change forced-fresh command: mkdir -p build/cron-20261018-after-gc-type-needs-decref/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-gc-type-needs-decref/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-gc-type-needs-decref/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Both former GC-branch diagnostics are gone. First remaining diagnostic is typeobject.c(1636) C2275/C2146/C2065 for descrgetfunc f, a separate untouched declaration family. Capture: build/cron-20261018-after-gc-type-needs-decref/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; this is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-subtype-dealloc-gc-type-needs-decref-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then isolate only the first typeobject.c(1636) descrgetfunc declaration family. No completed port is claimed.

Latest verified slice (`subtype_dealloc()` non-GC `type_needs_decref` declaration; frontier advances)

Date: 2026-10-18 UTC

Used existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference first. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior type_needs_decref frontier was force-fresh confirmed: _blake2/blake2s_impl.c compiled, then VC6 reported C2143 at typeobject.c(1359) and a consequent C2065 at line 1372. The configured Hermes coding delegation could not start because Anthropic credentials are unavailable. Per the delegation workflow, the authenticated Codex CLI (codex-cli 0.153.4) handled one focused strict-TDD lane. New scripts/vc6-typeobject-subtype-dealloc-type-needs-decref-c89.test.py failed against unchanged production source (exit 1) on the expected non-GC block-entry declaration assertion. The only production change declares int type_needs_decref; at the start of the non-GC branch and changes the prior initialized declaration to assignment at its existing evaluation point. The separate GC-branch declaration and all control flow remain untouched. The focused regression and all 28 scripts/vc6-typeobject-*.test.py tests passed. Both repository diff checks passed. A hash comparison confirmed all 98 outer tracked-dirty/untracked files captured before work were unchanged; the nested source change was separately inspected and is limited to the intended declaration/assignment delta.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh probe: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; first diagnostics typeobject.c(1359) C2143 and (1372) C2065 type_needs_decref; _blake2/blake2s_impl.c compiled.
TDD RED: python3 scripts/vc6-typeobject-subtype-dealloc-type-needs-decref-c89.test.py before production edit — exit 1 with expected block-entry declaration assertion; git diff --exit-code -- cpython/Objects/typeobject.c — exit 0, confirming source unchanged during RED.
GREEN/regressions: focused regression after edit — exit 0. for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 28 tests passed.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-type-needs-decref/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-type-needs-decref/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-type-needs-decref/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Both former non-GC branch errors are gone. Next first diagnostic is the separate GC-branch C2143 at typeobject.c(1486), followed by C2065 type_needs_decref at line 1496; untouched. Full captures are in build/cron-20261018-current-reprobe/probe.log and build/cron-20261018-after-type-needs-decref/probe.log.
git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-subtype-dealloc-type-needs-decref-c89.test.py and git -C cpython diff --check -- Objects/typeobject.c — exit 0. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-subtype-dealloc-type-needs-decref-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then isolate only the distinct GC-branch type_needs_decref declaration at line 1486. No completed port is claimed.

Latest verified slice (`subtype_traverse()` managed-dict `err` declaration; frontier advances)

Date: 2026-10-18 UTC

The recorded type_call() frontier was stale. A forced-fresh probe confirmed the first stable error family at typeobject.c(1235) inside subtype_traverse()'s managed-dict branch: C2143 late declaration, then C2065 err at line 1236. One focused delegated implementation lane was attempted via the Hermes provider but could not start because Anthropic credentials are unavailable. The installed authenticated Codex CLI (codex-cli 0.153.4) completed one focused strict-TDD lane instead. New scripts/vc6-typeobject-subtype-traverse-err-c89.test.py was run against unchanged production source and failed on the expected missing function-entry declaration assertion (RED). The only production change hoists int err; into subtype_traverse()'s opening declarations and replaces the later initialized declaration with assignment at the same point after the existing assert. The separate traverse_slots() local err, evaluation point, error propagation, and control flow are preserved. The focused test and all 27 scripts/vc6-typeobject-*.test.py regressions passed. A byte-preservation check verified 226 other pre-existing dirty/untracked files were unchanged and typeobject.c contains exactly the requested source delta.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh probe: mkdir -p build/cron-20261018-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; first captured diagnostic typeobject.c(1235) C2143, followed by C2065 err at line 1236. _blake2/blake2s_impl.c compiled.
TDD RED: python3 scripts/vc6-typeobject-subtype-traverse-err-c89.test.py before source edit — exit 1, expected function-entry declaration assertion. GREEN: same command after edit — exit 0.
Regressions: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 27 passed.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-subtype-traverse/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-subtype-traverse/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-subtype-traverse/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; the former line-1235/1236 errors are gone. First remaining captured error is typeobject.c(1359) C2143, then line 1372 C2065 type_needs_decref; source family left untouched. Capture: build/cron-20261018-after-subtype-traverse/probe.log.
git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-subtype-traverse-err-c89.test.py — exit 0. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-subtype-traverse-err-c89.test.py, and this status entry. Next frontier: force-fresh confirm before isolating only the typeobject.c(1359) declaration family (type_needs_decref); do not claim a completed port.

Latest verified slice (`type_repr()` local declarations; frontier advances)

Date: 2026-10-17 14:22 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; the requested /home/ubuntu/projects/python-win9x path does not exist. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before changes. Preserved all pre-existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, or publication. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded typeobject.c(1047) frontier remained current under a forced-fresh VC6/Wine probe: _blake2/blake2s_impl.c compiled, then type_repr() failed on the late PyObject *mod, *name, *rtn; declaration. One focused Codex CLI lane (codex-cli 0.153.4, authenticated OpenAI, --sandbox workspace-write --ephemeral) followed TDD. It added the regression first, and observed the intended RED against unchanged production source. The only production change moves that declaration to the opening block before the type->tp_name guard; all assignments, evaluation order, and control flow remain unchanged. No other defect family was edited.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261018-before-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-before-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-before-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; first stable diagnostic group at typeobject.c(1047) was C2275 PyObject illegal use as expression, C2065 mod/name/rtn undeclared, and C2100 illegal indirection. _blake2/blake2s_impl.c compiled. Capture: build/cron-20261018-before-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-type-repr-c89.test.py before production edit — exit 1, expected assertion type_repr: PyObject *mod, *name, *rtn; must be in the opening declaration block.
TDD GREEN: same focused test after edit — exit 0, type_repr locals C89 declaration and unchanged assignment/evaluation/control flow: PASS. Applicable regression command for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 25 typeobject tests passed.
After-change forced-fresh command: mkdir -p build/cron-20261018-after-type-repr/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-type-repr/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-type-repr/probe.log 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. All former line-1047 diagnostics are gone. First remaining diagnostics: typeobject.c(1090) C2143 missing semicolon before type, then line 1092 C2065 nargs undeclared; left untouched. Capture: build/cron-20261018-after-type-repr/probe.log.
git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-type-repr-c89.test.py — exit 0. Pre-existing changed/untracked path lists remained unchanged except the one intended new test; the already-modified Objects/typeobject.c retained its pre-existing status.
Compiler-probe progress only. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred.

Files changed by this slice: cpython/Objects/typeobject.c (one declaration move); new scripts/vc6-typeobject-type-repr-c89.test.py; and this status entry. Next frontier: force-fresh confirm then isolate only the type_call() declaration at typeobject.c(1090). Do not claim a completed port.

Latest verified slice (`type_set_annotations()` result declaration; frontier advances)

Date: 2026-10-17 12:10 UTC

Used existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and the profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded _PyType_Name() frontier was stale. Forced-fresh VC6/Wine probing confirmed _blake2/blake2s_impl.c compiled, then the first stable diagnostic was typeobject.c(972) C2143, the late int result; declaration in type_set_annotations(). One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write --ephemeral) followed TDD. It added scripts/vc6-typeobject-set-annotations-c89.test.py and ran it before the production edit; RED exited 1 with the expected assertion that result must precede the immutable-type guard. The only production change moved int result; to the function's opening declaration block; executable statements, assignments, branches, and order were preserved. Its snapshot check confirmed existing changed/untracked paths were byte-identical other than this intended source edit.

Exact verification:

Before-change forced-fresh probe: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First error at log line 1375: cpython\\Objects\\typeobject.c(972) : error C2143: syntax error : missing ';' before 'type'. Capture: build/cron-20261018-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-annotations-c89.test.py before production edit — exit 1, expected assertion type_set_annotations: result must be declared before the immutable-type guard.
GREEN/regressions: focused test passed; all 24 scripts/vc6-typeobject-*.test.py scripts passed (overall exit 0). Outer git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-set-annotations-c89.test.py and nested git -C cpython diff --check -- Objects/typeobject.c — exit 0.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-set-annotations/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-set-annotations/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-set-annotations/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; the changed typeobject.c compiled through the former line-972 error. First remaining errors at line 1047 are C2275/C2065 for PyObject/mod/name and consequent C2100/C2065 for rtn in the next function; untouched. Capture: build/cron-20261018-after-set-annotations/probe.log.
Compiler-probe progress only. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-annotations-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then isolate only the first typeobject.c(1047) declaration family. No completed port is claimed.

Previous verified slice (`type_get_annotations()` local declaration; frontier advances)

Date: 2026-10-17 09:57 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused Codex CLI lane (codex-cli 0.153.4, authenticated OpenAI, workspace-write --ephemeral) followed TDD on the forced-fresh frontier. Before editing, the first stable diagnostics were Objects/typeobject.c(937) C2275 (PyObject) and C2065 (annotations) in type_get_annotations(). The source defect was a late local declaration after the heap-type guard. The only production edit moved PyObject *annotations; to the function's opening declaration position; all executable statements and their order remain unchanged. The focused regression checks the declaration placement and exact tokenized function body. An initial test implementation had a faulty whitespace assertion; its RED assertion failed for that test defect, was corrected, and the focused test was then rerun against unchanged production source to observe the expected RED.

Exact verification:

Before-change forced-fresh probe: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: C2275/C2065 at typeobject.c(937) for PyObject/annotations. Capture: build/cron-20261018-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-get-annotations-c89.test.py against unchanged source — exit 1 with expected assertion type_get_annotations: annotations must be declared before the heap-type guard; cmp cpython/Objects/typeobject.c /tmp/win9x-annotations-check/typeobject.before.c — exit 0.
GREEN and regressions: focused test — exit 0; all 23 scripts/vc6-typeobject-*.test.py scripts — exit 0. Preservation check verified 4,838 other baseline files byte-identical; prior entries in both repository statuses were retained. Scoped outer/nested git diff --check — exit 0.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-annotations/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-annotations/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-annotations/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Both former line-937 diagnostics are gone. Next first stable error is the distinct typeobject.c(972) C2143 missing-semicolon-before-type diagnostic, followed by C2065 result at line 975; untouched. Capture: build/cron-20261018-after-annotations/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-get-annotations-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then isolate only the type_set_annotations() first diagnostic family. No completed port is claimed.

Latest verified slice (`type_set_bases()` rollback loop index; frontier advances)

Date: 2026-10-18 UTC

Used existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read PORT_STATUS.md, README.md, and the profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md first. Preserved all pre-existing outer and detached CPython work. No reset, clean, stash, discard, commit, push, or publication. The earlier recorded res frontier was stale: forced-fresh probing showed its fix was already present and advanced the first stable blocker to the rollback-loop C99 Py_ssize_t i declaration at typeobject.c(847). Baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI, workspace-write/ephemeral) followed TDD and preserved pre-existing changes. The new regression failed against unchanged production source, as expected. Since type_set_bases() already declares Py_ssize_t i at function scope, the sole production edit removes the redundant type from the rollback loop initializer, retaining reverse iteration, bounds, and restoration body. Regression covers rollback ordering and cleanup. A snapshot check confirmed all pre-existing file contents remain identical except the exact production line; only the requested regression test was added.

Exact commands/results:

Before-change forced-fresh probe: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; first error typeobject.c(847) C2143 on the C99 rollback-loop initializer. Capture: build/cron-20261018-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-rollback-index-c89.test.py — exit 1, expected C99 rollback loop index declaration remains; cmp cpython/Objects/typeobject.c /tmp/typeobject-rollback-before.c — exit 0 confirming production source unchanged for RED.
TDD GREEN and all applicable tests: focused regression — exit 0; all 22 scripts/vc6-typeobject-*.test.py scripts — exit 0. Snapshot preservation check — exit 0. Scoped outer and nested git diff --check — exit 0.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-rollback-index/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-rollback-index/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-rollback-index/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The rollback-loop diagnostic at line 847 is gone. First remaining error is typeobject.c(937) C2275: 'PyObject' : illegal use of this type as an expression; distinct later blocker untouched. Capture: build/cron-20261018-after-rollback-index/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution occurred; this is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-bases-rollback-index-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then isolate the typeobject.c(937) defect family only. No completed port is claimed.

Previous verified slice (`type_set_bases()` `res` declaration; frontier advances)

Date: 2026-10-18 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; the requested /home/ubuntu/projects/python-win9x path does not exist. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all prior outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A forced-fresh MSVC600/Wine probe confirmed the recorded type_set_bases() res blocker. One focused authenticated Codex CLI coding lane (codex-cli 0.153.4, OpenAI, --sandbox workspace-write --ephemeral) followed TDD: added a focused regression and ran it against the unchanged source, observing the expected RED; then declared only int res; among the opening locals. Assignments, branches, and evaluation order were not changed. The child initially observed three existing declaration-fixture failures because they expected if immediately following the prior locals; narrowly updated those three directly affected expectations to account for int res;. No other production source changed.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; first diagnostic typeobject.c(821) C2065: 'res' : undeclared identifier. Capture: build/cron-20261018-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-res-c89.test.py before production edit — exit 1, expected assertion type_set_bases: res must be declared with the opening locals.
GREEN/regressions: focused test and all scripts/vc6-typeobject-*.test.py — exit 0; 21 scripts passed. Initial full-suite run caught three stale declaration expectations; they were narrowly updated, and the full suite then passed. Scoped git diff --check (status and four affected outer tests) and git -C cpython diff --check -- Objects/typeobject.c — exit 0.
After-change forced-fresh command: mkdir -p build/cron-20261018-after-res/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-res/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-res/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0; prior res undeclared error is gone. First remaining diagnostic advances to typeobject.c(847) C2143/C2059 for the distinct C99 rollback-loop index for (Py_ssize_t i = n - 1; ...); left untouched. Capture: build/cron-20261018-after-res/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; this is compiler-probe progress only.

Files changed in this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-bases-res-c89.test.py; narrowly updated scripts/vc6-typeobject-set-bases-index-c89.test.py, scripts/vc6-typeobject-set-bases-n-c89.test.py, and scripts/vc6-typeobject-set-bases-new-base-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then isolate only the rollback-loop C89 index declaration. No completed port is claimed.

Previous verified slice (`type_set_bases()` `temp` declaration; frontier advances)

Date: 2026-10-17 UTC

Used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; the requested /home/ubuntu/projects/python-win9x path does not exist. Read PORT_STATUS.md, README.md, and the applicable CPython Win9x/MSVC6 reference. Preserved the existing dirty/untracked outer and nested CPython work; no reset, clean, stash, discard, commit, push, or publication. The CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A forced-fresh compiler probe confirmed the previous typeobject declaration sequence had moved on: temp was the first undeclared identifier in type_set_bases(). One focused Hermes coding delegation was attempted but did not start because Anthropic credentials are unavailable. Implemented just the confirmed local declaration under TDD; the assignment remains at its original point, after the existing base updates. Adjusted only the directly affected expectations for the already-hoisted locals in the related set_bases tests. No res or later defect family was changed.

Exact verification:

Before probe command: mkdir -p build/cron-20261017-current-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261017-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261017-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; first diagnostic typeobject.c(809) C2065: 'temp' : undeclared identifier. _blake2/blake2s_impl.c compiled. Capture: build/cron-20261017-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-temp-c89.test.py before source edit — exit 1 with the intended assertion that temp must be in the opening declarations.
GREEN/regressions: focused test plus every scripts/vc6-typeobject-*.test.py — exit 0; all 20 typeobject scripts passed. Scoped git diff --check for edited outer tests and nested Objects/typeobject.c — exit 0.
After probe command: mkdir -p build/cron-20261017-after-temp/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261017-after-temp/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261017-after-temp/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled, former temp error removed, and first diagnostic is now typeobject.c(821) C2065: 'res' : undeclared identifier. res and all later blockers remain unchanged. Capture: build/cron-20261017-after-temp/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed in this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-bases-temp-c89.test.py; narrowly updated expected declaration block in scripts/vc6-typeobject-set-bases-index-c89.test.py, scripts/vc6-typeobject-set-bases-new-base-c89.test.py, and scripts/vc6-typeobject-set-bases-n-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then handle only res in type_set_bases() if still first. No completed port is claimed.

Latest verified slice (`type_set_bases()` `old_bases` declaration; frontier advances)

Date: 2026-10-16 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; the requested /home/ubuntu/projects/python-win9x path does not exist. Read PORT_STATUS.md, README.md, and the profile legacy-toolchain reference. Preserved the extensive pre-existing dirty/untracked outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded new_base frontier had advanced. A forced-fresh probe compiled _blake2/blake2s_impl.c; the first errors were typeobject.c(800) C2275/C2065 for the late PyObject *old_bases = type->tp_bases;, followed by separate old_base and temp declaration errors. A focused Hermes coding delegation was attempted but could not start because Anthropic credentials are unavailable. Implemented only the confirmed old_bases declaration/assignment split under TDD: new scripts/vc6-typeobject-set-bases-old-bases-c89.test.py failed first (exit 1, intended opening-declaration assertion); source now declares PyObject *old_bases; with function locals and assigns old_bases = type->tp_bases; at its previous point immediately before its assertion. Evaluation and assertion order are unchanged. Directly affected existing type_set_bases expectation tests were adjusted to account for the new local. No old_base, temp, res, or other defect family was changed.

Exact verification:

Before probe: mkdir -p "$TMPDIR/cp311-cron-typeobject-before/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-typeobject-before/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-typeobject-before/probe.log" 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; first errors at typeobject.c(800) C2275/C2065 old_bases. Initial independent confirmation was captured at build/cron-20261016-frontier-confirm/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-old-bases-c89.test.py before production edit — exit 1 at expected missing declaration assertion.
GREEN and applicable regressions: python3 scripts/vc6-typeobject-set-bases-old-bases-c89.test.py plus every scripts/vc6-typeobject-*.test.py — exit 0; 18 typeobject scripts passed. Scoped git diff --check in nested source and outer changed tests — exit 0.
After probe: mkdir -p build/cron-20261016-old-bases-after/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261016-old-bases-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261016-old-bases-after/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; former old_bases errors are gone. First current diagnostics are separate old_base undeclared at line 803 and temp undeclared at line 808, left untouched. Capture: build/cron-20261016-old-bases-after/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-bases-old-bases-c89.test.py; directly affected expectations in scripts/vc6-typeobject-set-bases-index-c89.test.py, scripts/vc6-typeobject-set-bases-n-c89.test.py, and scripts/vc6-typeobject-set-bases-new-base-c89.test.py; and this status entry. Next frontier: force-fresh confirm and handle only old_base if still first. No completed port is claimed.

Date: 2026-10-16 16:21 UTC

Used the existing checkout at /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; the requested /home/ubuntu/projects/python-win9x path does not exist. Read README.md, this status, and the CPython 3.11.16/MSVC6 reference under the active profile. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded frontier had advanced; before editing a forced-fresh VC6 probe confirmed _blake2/blake2s_impl.c compiled and the first diagnostic was typeobject.c(769) C2275/C2065 for the late PyTypeObject *base declaration in type_set_bases(). A focused Hermes coding-subagent could not start because the configured Anthropic provider has no credentials. The installed authenticated Codex CLI (codex-cli 0.153.4) performed one narrow implementation lane under TDD. New scripts/vc6-typeobject-set-bases-base-c89.test.py failed before the production edit on the intended missing loop-opening declaration. The sole production change declares base at the top of the loop body and assigns (PyTypeObject*)ob only after the existing PyType_Check(ob) validation; item retrieval, validation, cast timing, and subsequent checks remain ordered as before. No other production defect family changed.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cp311-cron-current-frontier/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-current-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-current-frontier/probe.log" 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First compiler errors: typeobject.c(769) C2275/C2065 on PyTypeObject *base. Capture: $TMPDIR/cp311-cron-current-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-base-c89.test.py before source edit — exit 1 with the expected assertion that base is missing from the loop's opening declaration block.
TDD GREEN and applicable regression suite: focused test plus all scripts/vc6-typeobject-*.test.py — exit 0; all 16 typeobject regression scripts passed.
First after-change probe attempt used the requested scratch XDG_RUNTIME_DIR and exited 1 before compilation because Wine could not create its server lock under /run/user/1000 (read-only filesystem). wine cmd /c ver with project-local XDG_RUNTIME_DIR="$PWD/build/cronbase/runtime" exited 0 (Microsoft Windows 10.0.19043). Retried forced-fresh with mkdir -p build/cron-current-after/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-after/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-769 base diagnostics are gone. First current diagnostics advance to typeobject.c(791) C2275/C2065 on the distinct PyTypeObject *new_base declaration, left untouched. Capture: build/cron-current-after/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested/outer git diff --check — exit 0. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-set-bases-base-c89.test.py, and this status entry. Next frontier: force-fresh confirmation before handling only the late new_base declaration in type_set_bases(); keep subsequent declaration families separate. No completed port is claimed.

Latest verified slice (`type_set_bases()` loop-index C89 declaration; frontier advances)

Date: 2026-10-16 UTC

The requested /home/ubuntu/projects/python-win9x path did not exist; this existing checkout at /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x was used. Read PORT_STATUS.md and README.md before acting. The named legacy reference references/python-3-win9x-msvc6.md was not found under this workspace or the searched legacy-ports tree; used the loaded legacy-toolchain skill guidance. Preserved all prior dirty and untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c sequence was no longer the active compiler frontier: a forced-fresh probe confirmed that file compiled, then first stopped at typeobject.c(760) in type_set_bases() on for (Py_ssize_t i = 0; ...). One focused authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI, workspace-write/ephemeral) implemented only this C89 loop-index slice under TDD. The test was run against the pre-edit source and failed on the expected missing declaration; the production change hoists Py_ssize_t i; adjacent to n and retains i = 0 in the original loop initializer. It did not change the separate rollback loop. The existing set-bases-n regression was updated for the new declaration while keeping its earlier validation-order checks. Codex initially observed a test assertion failure because the first test version counted the separate rollback-loop i; the test was scoped to the requested validation loop and the complete applicable suite then passed. Snapshot/hash verification confirmed all pre-existing files except the two intentionally edited files remained unchanged.

Exact verification:

Before-edit command: mkdir -p "$TMPDIR/cp311-cron-blake-reprobe/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-blake-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-blake-reprobe/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics were at typeobject.c(760) C2143/C2065/C2059 for the C99 loop declaration. Capture: $TMPDIR/cp311-cron-blake-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-index-c89.test.py against saved pre-edit typeobject.c — exit 1 on the intended assertion that Py_ssize_t i; must follow n in the opening declaration block.
Focused GREEN: python3 scripts/vc6-typeobject-set-bases-index-c89.test.py — exit 0, type_set_bases loop index C89 declaration and unchanged evaluation order: PASS.
Applicable regression suite: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" >/dev/null || { printf 'regression_failed=%s\\n' "$test"; exit 1; }; done — exit 0; all 15 scripts passed.
After-edit forced-fresh command: mkdir -p "$TMPDIR/cp311-cron-blake-after/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-blake-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-blake-after/probe.log" 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The prior loop-declaration diagnostics at line 760 are gone. First current diagnostics advance to typeobject.c(769) C2275/C2065 for the separate late PyTypeObject *base declaration; subsequent errors remain untouched. Capture: $TMPDIR/cp311-cron-blake-after/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Focused nested and outer git diff --check commands exited 0.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-set-bases-index-c89.test.py, updated scripts/vc6-typeobject-set-bases-n-c89.test.py, and this status entry. Next frontier: force-fresh re-probe before isolating the newly observed type_set_bases() late PyTypeObject *base declaration. Do not combine it with later declaration families or claim the port is complete.

Latest verified slice (`_PyType_Name()` C89 local declaration; frontier advances)

Date: 2026-10-16 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain guidance before acting. The specific python-3-win9x-msvc6.md reference file was not present in the expected workspace/profile locations. The instructed /home/ubuntu/projects/python-win9x path does not exist; used the current checkout at /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Preserved existing dirty/untracked state in both repositories; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A fresh probe confirmed the recorded _PyType_Name() blocker. A Hermes coding delegation could not start because the configured Anthropic provider has no credentials; the installed authenticated Codex CLI (codex-cli 0.153.4, workspace-write/ephemeral) performed one focused implementation lane under strict TDD. The new test failed before source change at the expected missing opening declaration. Only const char *s; was hoisted; assignment to strrchr() stays after the assertion at its prior evaluation point. Codex hash checks confirmed pre-existing dirty/untracked files remained unchanged; the production file differed only by the requested declaration/assignment split.

Exact verification:

Before-change command: mkdir -p "$TMPDIR/cp311-cron-reprobe/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-reprobe/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(463) C2143, then (464) C2065 for s. Capture: $TMPDIR/cp311-cron-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-type-name-c89.test.py before production change — exit 1, expected assertion that const char *s; must be in the opening declaration block.
GREEN and applicable regressions: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all nine typeobject test scripts passed.
After-change forced-fresh command: mkdir -p "$TMPDIR/cp311-cron-after/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-after/probe.log" 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former lines 463-464 errors are gone. First current diagnostics advance to typeobject.c(677) C2275/C2065 for new_mro, then line 679 for tuple; these are separate and untouched. Capture: $TMPDIR/cp311-cron-after/probe.log.
Baseline tag and commit verified unchanged. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-name-c89.test.py, and PORT_STATUS.md. Next frontier: force-fresh re-probe before choosing the next isolated typeobject.c defect family; first observed is the late new_mro declaration at line 677. Do not conflate a compiler-probe advance with a linked or target-running interpreter.

Latest verified slice (`assign_version_tag()` C89 loop index; frontier advances)

Date: 2026-10-16 UTC

Exact verification:

Before-change forced-fresh probe: mkdir -p "$TMPDIR/cp311-current-frontier/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-current-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-current-frontier/probe.log" 2>&1 — actual probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics were typeobject.c(411) C2143/C2065/C2059 cascading from for (Py_ssize_t i = 0; ...). Capture: $TMPDIR/cp311-current-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-assign-version-tag-index-c89.test.py before production change — exit 1 on the expected assertion that function-scope i must precede statements.
GREEN and applicable regressions: focused test plus for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; done — exit 0; all nine typeobject tests pass. Two existing expectations (vc6-typeobject-assign-version-tag-n-c89.test.py, vc6-typeobject-mro-bases-c89.test.py) were narrowly adjusted for the hoisted declaration and assignment-form loop; their other behavior/order assertions remain.
The only production change is cpython/Objects/typeobject.c: declare Py_ssize_t i; with assign_version_tag() locals and change the loop initializer to i = 0; bounds, body, and evaluation/control-flow order remain unchanged.
After-change forced-fresh probe: mkdir -p "$TMPDIR/cp311-after-assign-version-tag-index/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-after-assign-version-tag-index/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-after-assign-version-tag-index/probe.log" 2>&1 — actual probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former line-411 diagnostics are gone. New first stable blocker: typeobject.c(463) C2143 and (464) C2065 for the later const char *s declaration in _PyType_Name(); untouched. Capture: $TMPDIR/cp311-after-assign-version-tag-index/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped source/test git diff --check commands exited 0. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-assign-version-tag-index-c89.test.py, focused expectation updates in scripts/vc6-typeobject-assign-version-tag-n-c89.test.py and scripts/vc6-typeobject-mro-bases-c89.test.py, and this status entry. Next frontier: force-fresh re-probe before choosing a separate slice for _PyType_Name()'s s declaration if it remains first. Do not combine it with later typeobject.c blockers or claim a completed port.

Latest verified slice (`type_mro_modified()` `custom_mro` C89 declaration; frontier advances)

Date: 2026-10-15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded type_mro_modified() frontier was force-reprobed and confirmed: _blake2/blake2s_impl.c compiled, then VC6 reported C2143 at typeobject.c(362) for the late int custom_mro declaration; a later C2065 at line 365 was consequential. One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) used strict TDD. New scripts/vc6-typeobject-custom-mro-c89.test.py failed before the production edit with the expected missing opening-block declaration assertion. The only production change declares custom_mro in the opening declaration block of if (custom) and assigns it after both successful lookups, at the original evaluation point before decrefs and the conditional. Lookup failure handling and evaluation order are unchanged. No later blocker was edited.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cp311-current-frontier/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-current-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-current-frontier/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic: typeobject.c(362) C2143; later diagnostic: typeobject.c(365) C2065 for custom_mro. Capture: $TMPDIR/cp311-current-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-custom-mro-c89.test.py before production edit — exit 1, expected assertion custom_mro must be declared in the opening declaration block.
GREEN and applicable regressions: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all six typeobject scripts passed.
After-change forced-fresh command with equivalent XDG_RUNTIME_DIR="$TMPDIR/cp311-after-custom-mro/runtime" environment — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-362/365 diagnostics are gone. Next first diagnostics are separate typeobject.c(407) C2275/C2065 for bases, followed by n and loop-index diagnostics at lines 408-409; these remain untouched. Capture: $TMPDIR/cp311-after-custom-mro/probe.log.
Focused and all typeobject tests — exit 0. git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-custom-mro-c89.test.py — exit 0. Baseline tag/commit remain unchanged.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only, not a completed port.

Files changed by this slice: cpython/Objects/typeobject.c (only the custom_mro declaration/assignment split), new scripts/vc6-typeobject-custom-mro-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then address only the first remaining type_mro_modified() bases declaration if still current; keep n and loop index as separate defect families.

Previous verified slice (`PyType_Modified()` `obj` declaration; frontier advances)

Date: 2026-10-15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior recorded PyType_Modified() obj declaration frontier was force-reprobed and confirmed. _blake2/blake2s_impl.c compiled; the first diagnostics were typeobject.c(318) C2143 and (319) C2065 for the late initialized PyObject *obj. One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD. It updated scripts/vc6-typeobject-modified-ref-c89.test.py first; the RED run exited 1 on the expected missing opening-block obj declaration. The minimal production edit hoists PyObject *obj; into PyType_Modified()'s opening declaration block and changes the old declaration to obj = PyWeakref_GET_OBJECT(ref); at the original evaluation point. The directly applicable subclasses test expectation was narrowly updated. No other production defect family was changed. No commit or publication occurred.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cp311-frontier-refresh/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-frontier-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-frontier-refresh/probe.log" 2>&1 — compiler probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors: typeobject.c(318) C2143 and (319) C2065 on obj; later diagnostics were subsequent distinct blockers. Capture: $TMPDIR/cp311-frontier-refresh/probe.log.
TDD RED: python3 scripts/vc6-typeobject-modified-ref-c89.test.py after test-only update and before source edit — exit 1, expected assertion: PyType_Modified: PyObject *obj; must be in the opening declaration block.
GREEN and applicable regressions: focused ref test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all five typeobject scripts passed.
After-change forced-fresh command: mkdir -p "$TMPDIR/cp311-frontier-after-obj/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-frontier-after-obj/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-frontier-after-obj/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-318/319 obj diagnostics are gone. The next diagnostics advance to the separate type_mro_modified() C89 declaration at line 362 (C2143), followed by custom_mro at line 365; neither was changed. Capture: $TMPDIR/cp311-frontier-after-obj/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested and outer diff checks exited 0. Before/after porcelain snapshots match in both repositories outside this intentional slice; extensive pre-existing changes remain present.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only; no completed port is claimed.

Files changed by this slice: cpython/Objects/typeobject.c (only PyType_Modified()'s obj declaration/assignment split), scripts/vc6-typeobject-modified-ref-c89.test.py, scripts/vc6-typeobject-modified-subclasses-c89.test.py, and this status entry. Next frontier: force-fresh probe, then handle only the newly confirmed type_mro_modified() blocker if still first; keep the later custom_mro declaration separate.

Latest verified slice (`PyType_Modified()` C89 loop-index declaration; frontier advances)

Date: 2026-10-15 09:17 UTC

Read PORT_STATUS.md and README.md before acting. The requested CPython Win9x/MSVC6 reference file was not found in this checkout or active profile path; followed the loaded legacy-toolchain skill guidance. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was force-reprobed before editing and confirmed: _blake2/blake2s_impl.c compiled, then the first diagnostic was typeobject.c(313) on Py_ssize_t i = 0;. A focused Hermes coding-subagent launch was unavailable because the configured Anthropic provider had no credentials. Authenticated codex-cli 0.153.4 was used as one focused implementation lane, with strict TDD. New scripts/vc6-typeobject-modified-index-c89.test.py failed before the production edit (exit 1) on the intended assertion that Py_ssize_t i; belongs in the opening declaration block. The production change hoists only i and moves i = 0; to the exact original initialization point. Updated the directly applicable subclasses declaration expectation to permit the hoisted i. The distinct ref and obj declarations and all later blockers remain untouched.

Exact verification:

Before-edit forced-fresh command: XDG_RUNTIME_DIR="$TMPDIR/cp311-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(313) C2143 for the late loop-index declaration. Capture: $TMPDIR/cp311-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-modified-index-c89.test.py before production edit — exit 1, expected assertion PyType_Modified: Py_ssize_t i; must be declared at function entry.
GREEN and applicable regression: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; done — exit 0; all four typeobject tests passed.
After-edit forced-fresh command with the same environment/command — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former typeobject.c(313) loop-index diagnostic is gone; first current diagnostic advances to typeobject.c(315) C2275/C2065 on the separate PyObject *ref declaration. obj at line 318 and other typeobject blockers are later and untouched. Capture: $TMPDIR/cp311-frontier-after/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested and outer git diff --check on the three slice files — exit 0.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only; no completed port is claimed.

Files changed by this slice: cpython/Objects/typeobject.c (only the PyType_Modified() index declaration/assignment split), new scripts/vc6-typeobject-modified-index-c89.test.py, narrow expectation update to scripts/vc6-typeobject-modified-subclasses-c89.test.py, and this status entry. Next frontier: force-fresh probe, then address only the PyObject *ref declaration in PyType_Modified() if still first.

Previous verified slice (`PyType_Modified()` C89 subclasses declaration; frontier advances)

Date: 2026-10-15 07:05 UTC

Read PORT_STATUS.md and README.md before acting. The requested legacy-toolchain reference file was not found in this checkout or active profile path; the loaded legacy-toolchain skill guidance was followed. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded _PyType_InitCache() loop-index blocker was force-reprobed and its fix remains effective. _blake2/blake2s_impl.c compiled. The current first stable blocker was PyType_Modified()'s late PyObject *subclasses = type->tp_subclasses; at typeobject.c(307). One focused Codex CLI lane (codex-cli 0.153.4, OpenAI authenticated, workspace-write/ephemeral) followed strict TDD for only this declaration family. New scripts/vc6-typeobject-modified-subclasses-c89.test.py failed before the production edit with the intended assertion that subclasses must be declared at function entry. The sole production change hoists PyObject *subclasses; and leaves subclasses = type->tp_subclasses; immediately after the existing early-return guard. No other production defect family was changed.

Exact verification:

Before-change forced-fresh probe: VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh with XDG_RUNTIME_DIR="$TMPDIR/cron-reprobe/runtime", WINEPREFIX=/home/ubuntu/.wine-win9xport, and WINEDEBUG=-all; captured at $TMPDIR/cron-reprobe/probe.log. Probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics were typeobject.c(307) C2275/C2065 for PyObject/subclasses, followed by declaration errors at lines 311-316. No source edits occurred before this probe.
TDD RED: python3 scripts/vc6-typeobject-modified-subclasses-c89.test.py before source edit — exit 1 at the expected missing function-entry declaration assertion.
TDD GREEN: same focused test after source edit — exit 0. Applicable regression command for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 3 typeobject tests passed.
After-change forced-fresh probe using the same command/environment, captured at $TMPDIR/cron-after-subsclasses/probe.log — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former line-307 diagnostics are gone. The first remaining diagnostics are at typeobject.c(313) C2143, then line 314 C2275/C2065 for the later ref declaration and line 315 for i; these are distinct next declaration families and remain untouched.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git -C cpython diff --check -- Objects/typeobject.c and outer git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-modified-subclasses-c89.test.py — exit 0. The complete nested diff also contains earlier pre-existing typeobject edits; this slice's addition is restricted to PyType_Modified().
No DLL/executable link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only; no completed port is claimed.

Files changed by this slice: cpython/Objects/typeobject.c (one declaration/assignment split in PyType_Modified()), new scripts/vc6-typeobject-modified-subclasses-c89.test.py, and this status entry. Next frontier: force-fresh re-probe, then isolate only the ref/loop-index declaration blockers in PyType_Modified(); do not combine them with later type_mro_modified() or other typeobject.c diagnostics.

Previous verified slice (`_PyType_InitCache()` C89 loop index declaration; frontier advances)

Date: 2026-10-15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. A single delegated coding lane was attempted but could not start because no Anthropic credentials are configured; implementation proceeded directly under strict TDD.

The stale recorded tupleobject frontier was replaced based on a forced-fresh probe. It compiled _blake2/blake2s_impl.c and stopped in typeobject.c(228) at the C89 loop-local Py_ssize_t i. The narrow TDD change hoists i into _PyType_InitCache()'s opening declarations and retains loop bounds, increment, and body.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command used VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh with project-local XDG_RUNTIME_DIR and WINEPREFIX=/home/ubuntu/.wine-win9xport — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable error group was typeobject.c(228) C2143/C2065/C2059 for loop-local i. Capture: $TMPDIR/cron-current-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-mro-loop-c89.test.py before production edit — exit 1 on missing hoisted Py_ssize_t i;.
GREEN/regressions: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; done — exit 0; both typeobject tests passed.
After-change forced-fresh probe with the same command/environment — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Line-228 loop declaration errors are gone; first remaining group is typeobject.c(307) for a late PyObject *subclasses declaration. Full capture: $TMPDIR/cron-current-after/probe.log.
git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-mro-loop-c89.test.py — exit 0. No DLL/executable link, Wine interpreter execution, or Windows 98 SE execution occurred.

Files changed: cpython/Objects/typeobject.c (only _PyType_InitCache() loop index declaration split), new scripts/vc6-typeobject-mro-loop-c89.test.py, and this entry. Next frontier: freshly re-probe then handle only the typeobject.c(307) late subclasses declaration. Compiler-probe progress only; no completed port is claimed.

Previous verified slice (`maybe_freelist_push()` index C89 declaration; frontier advances)

Date: 2026-10-14 UTC

Read PORT_STATUS.md, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded tupleobject frontier was rechecked with a forced-fresh MSVC6 probe before editing. _blake2/blake2s_impl.c had already compiled, and the maybe_freelist_push() late Py_ssize_t index declaration at line 1247 was indeed the first current diagnostic. One focused Codex CLI coding lane was used. It added a single C89 regression test, observed RED, then moved the declaration into the function's declaration block while preserving assignment after the empty-tuple return. The later C89 for loop blockers were deliberately left untouched.

Exact verification:

Before-change probe: mkdir -p build/cron-20261014-tuple-index-before/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-tuple-index-before/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-tuple-index-before/probe.log 2>&1 — probe exit 2; total=108 compiled=107 cached=0 skipped=0. First errors were at tupleobject.c(1247) (C2275, C2146, C2065); next independent errors were C89 loops at lines 1268 and 1287. _blake2/blake2s_impl.c compiled. Log: build/cron-20261014-tuple-index-before/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-freelist-push-index-c89.test.py before source edit — exit 1, expected assertion that index must be declared before debug assertion and empty-tuple check.
TDD GREEN: same focused command after source edit — exit 0, maybe_freelist_push index C89 declaration and evaluation order: PASS.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; result=$?; printf '%s: exit %s\\n' "$test" "$result"; if [ "$result" -ne 0 ]; then exit "$result"; fi; done — exit 0; all 14 tupleobject tests passed.
After-change forced-fresh probe: mkdir -p build/cron-20261014-tuple-index-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-tuple-index-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-tuple-index-after/probe.log 2>&1 — probe exit 2; total=108 compiled=107 cached=0 skipped=0. The line-1247 errors are gone. The first remaining diagnostics are now C89 for loop declarations at tupleobject.c(1269) and (1288) (C2143/C2146/C2065/C2059 cascades). Log: build/cron-20261014-tuple-index-after/probe.log.
git diff --check -- PORT_STATUS.md scripts/vc6-tupleobject-freelist-push-index-c89.test.py and git -C cpython diff --check -- Objects/tupleobject.c — both exit 0. Detached baseline HEAD remains unchanged.

Files changed by this slice: cpython/Objects/tupleobject.c (only declaration and assignment in maybe_freelist_push()), new scripts/vc6-tupleobject-freelist-push-index-c89.test.py, and this status entry. Next compiler frontier: maybe_freelist_clear() loop declaration at line 1269; treat its defect family separately from the later loop in _PyTuple_DebugMallocStats() at line 1288. No linked pythoncore.dll/python.exe, Wine interpreter run, or real Windows 98 SE execution occurred: this is compiler-probe progress only, not a completed port.

Previous verified slice (`PyTuple_Type.tp_vectorcall` C89 initializer; frontier advances)

Date: 2026-10-14 15:38 UTC

Read PORT_STATUS.md, README.md, and the applicable CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The requested _blake2/blake2s_impl.c sequence was not the current compiler frontier: forced-fresh probe confirmed it compiles. The previously documented tupleobject designated-initializer blocker remained current. A single focused coding-agent delegation was attempted, but the configured Hermes provider could not start (Anthropic credentials unavailable). The installed authenticated Codex CLI was used as the focused implementation lane. It applied strict TDD to only PyTuple_Type's .tp_vectorcall designated initializer at line 919. New scripts/vc6-tupleobject-type-vectorcall-c89.test.py failed before production edits (exit 1) because strict C89 rejected the designated initializer. The source change replaces that one designator with nine zero positional entries for tp_is_gc through tp_finalize, then tuple_vectorcall for tp_vectorcall. These entries follow the checkout's PyTypeObject field order. No _blake2 file or other tupleobject defect family was changed.

Exact verification:

Before-change forced-fresh probe: mkdir -p build/cron-20261014-blake-frontier/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-blake-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-blake-frontier/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First current compiler errors: tupleobject.c(919) C2059 on .; later distinct errors at lines 1238, 1259, and 1278 were untouched. Capture: build/cron-20261014-blake-frontier/probe.log.
Focused coding-agent delegation attempt: unavailable before child startup because Anthropic credentials are not configured. Authenticated codex-cli 0.153.4 was used in a single codex exec --sandbox workspace-write --ephemeral lane. No commits or resets.
TDD RED: python3 scripts/vc6-tupleobject-type-vectorcall-c89.test.py cpython/Objects/tupleobject.c before source edit — exit 1, expected strict C89 designated-initializer failure. GREEN: same command after edit — exit 0; compiles the exact extracted initializer under cc -std=c89 -pedantic-errors -Wall -Wextra -Werror and checks all 48 semantic fields.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" cpython/Objects/tupleobject.c; done — exit 0 for all 13 scripts, including the new initializer regression.
After-change forced-fresh probe: mkdir -p build/cron-20261014-tuple-vectorcall-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-tuple-vectorcall-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-tuple-vectorcall-after/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-919 C2059 is gone. First remaining compiler diagnostics are now at tupleobject.c(1247) on Py_ssize_t index (C2275/C2146/C2065), followed by separate C89 loops at lines 1268 and 1287. Capture: build/cron-20261014-tuple-vectorcall-after/probe.log.
git diff --check -- PORT_STATUS.md scripts/vc6-tupleobject-type-vectorcall-c89.test.py and git -C cpython diff --check -- Objects/tupleobject.c — exit 0. Baseline tag/commit unchanged.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only PyTuple_Type initializer tail), new scripts/vc6-tupleobject-type-vectorcall-c89.test.py, and this status entry. Next frontier: in a separate TDD slice, force-fresh confirm and address only the tupleobject.c:1247 late index declaration. Do not conflate compiler-probe progress with a linked or target-running interpreter. No completed port is claimed.

Previous verified slice (`tuplerepeat()` `dest_end` declaration; frontier advances)

Date: 2026-10-14 11:13 UTC

The prior tuplerepeat() dest_end frontier was force-reprobed first and confirmed. A single focused coding-agent delegation was attempted, but the provider could not start because Anthropic credentials are unavailable. No child edits occurred. I proceeded with one narrow local TDD slice: added scripts/vc6-tupleobject-repeat-dest-end-c89.test.py; its pre-edit run failed with exit 1 on the intended missing opening-declaration assertion. The sole production change declares PyObject **dest_end in the opening block and changes the original initialized declaration to dest_end = dest + size; at the same point immediately after dest = np->ob_item. Updated the directly applicable existing scripts/vc6-tupleobject-repeat-dest-c89.test.py expectation to accept the new adjacent declaration and assignment while preserving its evaluation-order checks. Other tupleobject defect families were not edited.

Exact verification:

Before-change forced-fresh command: mkdir -p build/cron-20261014-frontier-refresh/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-frontier-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-frontier-refresh/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic family: tupleobject.c(530) C2275 (PyObject), C2065 (dest_end), C2100. Distinct later errors include nargs at 732, designated initializer at 916, index at 1235, and C89 loops at 1256/1275. Capture: build/cron-20261014-frontier-refresh/probe.log.
Coding delegation: failed before startup due missing Anthropic credentials/provider; no child edits.
TDD RED: python3 scripts/vc6-tupleobject-repeat-dest-end-c89.test.py before production edit — exit 1 on the intended assertion dest_end must be declared in the opening declaration block.
GREEN/regressions: focused dest_end test and all scripts/vc6-tupleobject-*.test.py — exit 0; all 11 tupleobject regressions passed. The pre-existing repeat-dest check initially failed on its obsolete declaration-with-initializer expectation; that narrow assertion was aligned with the split declaration/assignment, and the complete suite then passed.
After-change forced-fresh command: mkdir -p build/cron-20261014-frontier-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-frontier-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-frontier-after/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-530 diagnostics are gone; next tupleobject blocker is line 733 (Py_ssize_t nargs) with C2275/C2146/C2065, followed by separate line 917 designated initializer and later declaration/loop errors. Wine also logged that the project-local Wayland socket path exceeds 108 bytes; compilation nevertheless ran to tupleobject.c and returned compiler exit 2. Capture: build/cron-20261014-frontier-after/probe.log.
All tupleobject tests after updating the expectation: 11 passed; git -C cpython diff --check -- Objects/tupleobject.c and outer diff checks on the two focused tests and status — exit 0. Baseline tag/commit unchanged.
No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c, new scripts/vc6-tupleobject-repeat-dest-end-c89.test.py, updated scripts/vc6-tupleobject-repeat-dest-c89.test.py, and this status entry. Next frontier: in a separate TDD slice, force-fresh confirm and address only tuplerepeat()'s late Py_ssize_t nargs declaration at line 733. No completed port is claimed.

Latest run (fresh `tuplerepeat()` `dest_end` frontier; implementation lane unavailable)

Date: 2026-10-14 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previous status-recorded tuplerepeat() dest_end blocker was force-reprobed before any implementation work and remains current. One focused coding-agent delegation was attempted for this single defect family, but failed before child startup because the configured Hermes delegation provider requires unavailable Anthropic credentials. No child edits occurred. Per delegation/TDD constraints, this run is diagnostics-only: no RED/GREEN cycle and no source or regression-test edit is claimed. The existing tupleobject tests were run as regression diagnostics only.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261014-destend-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-destend-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-destend-reprobe/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. First stable diagnostics: tupleobject.c(530) C2275 (PyObject), C2065 (dest_end), and C2100. Later distinct diagnostics include nargs at line 732, designated initializer at 916, index at 1235, and C89 loop declarations at 1256/1275. Full compiler capture: build/cron-20261014-destend-reprobe/probe.log.
Focused coding-agent delegation for only the confirmed dest_end declaration — failed before startup: no Anthropic credentials/configured provider; no child edits.
set -e; for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; done — exit 0; all ten tupleobject regression scripts passed.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md — exit 0.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This remains compiler-probe progress only.

Files changed this run: PORT_STATUS.md only; probe evidence is under build/cron-20261014-destend-reprobe/. Next frontier: retry one strictly TDD coding slice for only tuplerepeat()'s dest_end declaration when the delegated coding provider can start. Preserve the assignment at its original evaluation point; keep all later tupleobject diagnostics separate. No port completion is claimed.

Latest verified slice (`tuplerepeat()` destination declaration; frontier advances)

Date: 2026-10-14 06:42 UTC

The status-recorded first blocker was force-reprobed before implementation and remains in tuplerepeat(): the late PyObject **dest = np->ob_item declaration. One focused Codex CLI coding lane (codex-cli 0.153.4, logged in, workspace-write/ephemeral; session 01a1392a-bdf0-7a73-948c-1dc78e92a676) followed strict TDD. New scripts/vc6-tupleobject-repeat-dest-c89.test.py failed before production edit (exit 1) on the intended assertion that dest belongs to the opening declaration block. The sole production edit declares dest with the other function locals and assigns dest = np->ob_item immediately after successful tuple allocation at the original evaluation point. dest_end and all later declaration families remain untouched. A pre-edit hash snapshot covered 192 existing changed/untracked paths across both repositories; verification confirmed all 191 unrelated files unchanged and the CPython source differed only by this declaration/assignment split.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261014-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-reprobe/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. First stable diagnostics were in tupleobject.c(528) C2275/C2065/C2100 for late PyObject **dest; separate dest_end at line 529 and later tupleobject diagnostics followed. Capture: build/cron-20261014-reprobe/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-repeat-dest-c89.test.py before source edit — exit 1, expected opening-declaration assertion. GREEN: same command after source edit — exit 0.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all ten tupleobject regression scripts pass.
After-change forced-fresh command: mkdir -p build/cron-20261014-after-tuplerepeat-dest/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-after-tuplerepeat-dest/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-after-tuplerepeat-dest/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. Former tuplerepeat() dest diagnostics are gone. The new first blocker is tupleobject.c(530) C2275/C2065/C2100 for the distinct late PyObject **dest_end declaration; later diagnostics include nargs at line 732, designated initializer at 916, index at 1235, and C89 loop declarations at 1256/1275, all untouched. The probe also logged non-fatal Wine errors that its project-local XDG_RUNTIME_DIR wayland socket path exceeds 108 bytes; compilation proceeded to tupleobject.c and returned the compiler's exit 2. Capture: build/cron-20261014-after-tuplerepeat-dest/probe.log.
Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-repeat-dest-c89.test.py — exit 0. Baseline tag/commit remain unchanged.
No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compile-frontier progress only, not a completed port.

Files changed by this slice: cpython/Objects/tupleobject.c (only tuplerepeat() dest declaration/assignment split), new scripts/vc6-tupleobject-repeat-dest-c89.test.py, and this status entry. Next frontier: in a separate TDD slice, force-fresh confirm and address only tuplerepeat()'s dest_end declaration. Keep the later tupleobject diagnostics separate.

Latest verified slice (`tupleconcat()` b declaration; host frontier advances)

Date: 2026-10-14 UTC

Preserved pre-existing outer/nested work. No reset, clean, stash, commit, push, or compatibility-patch regeneration. Codex sandbox probe was blocked by Wine server-lock permissions; host tools completed the real forced-fresh probes. Production change only splits tupleconcat()'s late PyTupleObject *b declaration into an opening declaration and an assignment at its original point after type validation. Added scripts/vc6-tupleobject-concat-b-c89.test.py.

Verification:

Before forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/manual-20261014-host-before/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh, stdout/stderr in build/manual-20261014-host-before/probe.log: exit 2; total=108 compiled=107 cached=0 skipped=0; first errors at tupleobject.c(471), C2275/C2065 for b. Earlier foreground attempt timed out at 180s, was confirmed stopped, then rerun as a tracked background process to completion.
RED: focused new regression exit 1 on intended opening-declaration assertion. GREEN after minimal source edit: exit 0.
All nine tupleobject regression scripts pass with explicit failure propagation. Scoped nested diff check passes.
After forced-fresh probe: identical command using build/manual-20261014-host-after/runtime, captured in build/manual-20261014-host-after/probe.log: exit 2; total=108 compiled=107 cached=0 skipped=0. Former tupleconcat errors are gone. First remaining blocker advances to tuplerepeat() at tupleobject.c(528), C2275/C2065 on late PyObject **dest; separate dest_end at 529 remains untouched.

Compile-frontier progress only; no linked DLL/interpreter, Wine interpreter execution, or Windows 98 runtime proof. Next slice: reproduce and isolate tuplerepeat's destination declaration. Nested source edits are not yet regenerated into the tracked compatibility patch.

Latest run (tupleconcat slice blocked before compilation)

Date: 2026-10-14 UTC

Read README.md, the top of PORT_STATUS.md, and the legacy-python-porting skill and references/cpython-msvc600-frontier.md. Nested baseline: git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549 (exit 0); git -C cpython describe --tags --exact-match → v3.11.16 (exit 0). Nested HEAD is detached (git -C cpython symbolic-ref -q --short HEAD, exit 1); outer branch is main. Host: Linux 7.0.0-38-generic x86_64 GNU/Linux; wine --version → wine-10.0 (Ubuntu 10.0~repack-12ubuntu1) (exit 0). The MSVC6 compiler never started, so no fresh compiler banner was obtained.

Before edits: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0, all eight standalone regressions passed.
Exact fresh-frontier command: mkdir -p build/manual-20261014-tupleconcat-before/runtime && XDG_RUNTIME_DIR="$PWD/build/manual-20261014-tupleconcat-before/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/manual-20261014-tupleconcat-before/probe.log 2>&1 — exit 1, also saved in build/manual-20261014-tupleconcat-before/exit-status.txt. Summary: total=1 compiled=0 cached=0 skipped=0.
The first attempted source was cpython/Modules/getpath.c. Wine reported sock_init: ERROR in sock_check_pollhup() and wineserver: error creating /run/user/1000/wine/server-801-136fb0/lock: Read-only file system. This is an environment blocker, not a verified C diagnostic. The previously recorded tupleobject.c(471) late b declaration remains unconfirmed in this run.
No production or regression edits, no RED/GREEN cycle, and no after-frontier run: stopped at the sandbox/Wine blocker as requested, without bypassing it or reconstructing a harness. No linked DLL/interpreter or runtime evidence.
Preservation snapshot: build/manual-20261014-tupleconcat-before/hashes.json records 190 existing dirty/untracked files plus both Git indexes, excluding ignored generated objects. Final comparison confirmed all 189 unrelated files and both indexes unchanged, tupleobject.c byte-identical, and the complete previous PORT_STATUS.md retained as the suffix after this prepend. Verification: build/manual-20261014-tupleconcat-before/preservation.txt. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md — exit 0.

Only PORT_STATUS.md was edited; local evidence is under build/manual-20261014-tupleconcat-before/. No reset, clean, stash, discard, commit, push, publication, broad patch regeneration, global configuration change, or backup-file operation. Next slice requires a working permitted Wine environment and a fresh frontier before choosing any source edit.

Latest run (`_PyTuple_FromArraySteal()` success-loop C89 index; frontier advances)

Date: 2026-10-14 UTC

One focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a1383e-4af6-7733-9273-023e090009ed) used strict TDD for the currently confirmed _PyTuple_FromArraySteal() success-path C99 loop index. The focused regression was updated and run before production edits; RED exit 1 on the intended assertion that the success loop must reuse the function-scope i. The only production change replaces for (Py_ssize_t i = 0; ...) with for (i = 0; ...); loop condition/increment and item assignment/order are unchanged. The next late PyObject *item declaration remains untouched. Two directly applicable pre-existing declaration/order tests contained the old loop syntax in their expected full-function text; after the coding lane reported these stale expectations, they were narrowly aligned to the corrected loop. No unrelated paths were changed.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261014-run2/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-run2/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-run2/probe.log 2>&1 — exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics at tupleobject.c(419) were C2143/C2059 for the success-loop declaration. Capture: build/cron-20261014-run2/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-from-array-steal-c89.test.py before source edit — exit 1 with AssertionError: _PyTuple_FromArraySteal: success loop must reuse function-scope i with assignment. GREEN after source edit — exit 0.
Applicable regressions: python3 scripts/vc6-tupleobject-from-array-steal-c89.test.py and for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; done — exit 0; all eight tupleobject tests passed. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-from-array-steal-c89.test.py scripts/vc6-tupleobject-from-array-steal-dst-c89.test.py scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py — exit 0.
Post-change forced-fresh command: mkdir -p build/cron-20261014-run2-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-run2-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-run2-after/probe.log 2>&1 — exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-419 diagnostics are gone; first remaining tupleobject blocker advances to tupleobject.c(471) in tupleconcat(), C2275/C2065 on late initialized PyTupleObject *b = (PyTupleObject *)bb;. Later independent errors at lines 527+ remain untouched. Capture: build/cron-20261014-run2-after/probe.log.
The Codex hash comparison confirmed only the intended two files changed during its lane and both repository indexes plus unrelated file contents, including PORT_STATUS.md, were preserved. Exact source diff and subsequent narrow fixture updates were inspected. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; this is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (one loop initializer), scripts/vc6-tupleobject-from-array-steal-c89.test.py, and directly applicable expectation updates in scripts/vc6-tupleobject-from-array-steal-dst-c89.test.py and scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py, plus this status entry. Next frontier: fresh probe before any edit; if unchanged, isolate only tupleconcat()'s late b declaration at line 471 with a single strict-TDD slice. No completed port is claimed.

Latest run (fresh tupleobject probe; coding-agent provider unavailable)

Date: 2026-10-14 00:21 UTC

Forced-fresh MSVC600/Wine probe shows the status-recorded _PyTuple_FromArraySteal() dst declaration blocker is stale: the current source already hoists tuple, i, and dst. The actual first remaining blocker in this function is the distinct loop-local for (Py_ssize_t i = 0; ...) at line 419, followed by a separate PyObject *item declaration at line 420; neither was changed. A focused coding-agent delegation was attempted for the single recorded dst slice, but failed before child startup because the Hermes runtime requires the unavailable anthropic package and lazy installs are disabled. Therefore this run is diagnostics-only: no TDD RED/GREEN, source/test edit, or implementation claim.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261014-current/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-current/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable tupleobject diagnostics are C2143 at tupleobject.c(419) (missing semicolon before type, repeated) and C2059 at (419) (syntax error )), on the loop's late Py_ssize_t i declaration. The subsequent PyObject *item declaration and other tupleobject diagnostics remain distinct and untouched. Capture: build/cron-20261014-current/probe.log.
Coding-agent prerequisite: codex --version → codex-cli 0.153.4; codex login status → logged in. The requested focused delegation could not start: Hermes delegation returned anthropic package required, venv not installed, lazy installs disabled. No child edits occurred.
Existing regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all eight focused tupleobject scripts passed, including the existing dst and tuple checks.
Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md — exit 0.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is probe progress only, not a completed port.

Files changed this run: PORT_STATUS.md only; diagnostic capture is under build/cron-20261014-current/. Next frontier: once a coding-agent provider can start, use one strict-TDD slice for only the currently confirmed loop index declaration at _PyTuple_FromArraySteal() line 419; leave the following item declaration separate. No port completion is claimed.

Latest run (`_PyTuple_FromArraySteal()` allocation-failure loop index; frontier advances)

Date: 2026-10-13 20:03 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded tuple declaration frontier was stale. Forced-fresh MSVC600/Wine probe compiled _blake2/blake2s_impl.c; the recorded _PyTuple_FromArraySteal() tuple declaration is already hoisted in the present checkout, so the actual first blocker was its distinct NULL-path loop-index declaration at line 411 (for (Py_ssize_t i = 0; ...)). One focused Codex CLI coding lane (codex-cli 0.153.4, logged in, workspace-write/ephemeral; session 01a136d7-1fdc-7f83-aef9-dd39ed531458) used strict TDD. The new focused test failed first on its intended assertion that function-scope Py_ssize_t i must precede statements. The sole production edit for this slice hoists Py_ssize_t i; into _PyTuple_FromArraySteal()'s declaration block and changes only the allocation-failure loop initializer to i = 0; the empty-tuple return, allocation, failure test, DECREF loop, and NULL return order are unchanged. The directly related pre-existing vc6-tupleobject-from-array-steal-tuple-c89.test.py expectation was updated to encode the new declaration placement and loop form. The later dst, success-path loop, and item declarations remain untouched. A hash snapshot covered 188 pre-existing dirty/untracked files in both repositories; 186 files outside the two intentionally involved test/source paths remained byte-identical, and the source diff was restricted to this function's index declaration/initializer.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261014-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-reprobe/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The first stable tupleobject.c diagnostics were line 411 C2143/C2065 (i undeclared), followed by separate dst/success-path diagnostics at lines 416-418. Capture: build/cron-20261014-reprobe/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-from-array-steal-c89.test.py before the source edit — exit 1 on the intended assertion that function-scope i must precede statements. GREEN after edit — exit 0.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit $?; done — exit 0; all seven tupleobject tests passed (alloc, dealloc, from-array, from-array-steal, from-array-steal-tuple, new, pack). Scoped git -C cpython diff --check -- Objects/tupleobject.c and outer git diff --check for the two focused tests — exit 0.
Post-change forced-fresh command: mkdir -p build/cron-20261014-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-after/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former NULL-path loop-index diagnostics are gone. The first remaining errors are now in the same function at line 417 on the distinct late PyObject **dst declaration, followed by the independent second loop and item declaration diagnostics at lines 418-420; left untouched. Capture: build/cron-20261014-after/probe.log.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only, not port completion.

Files changed by this slice: cpython/Objects/tupleobject.c (only the NULL-path loop index declaration split within _PyTuple_FromArraySteal()), new scripts/vc6-tupleobject-from-array-steal-c89.test.py, updated scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py, and this status entry. Next frontier: force-fresh probe before editing; if unchanged, isolate only _PyTuple_FromArraySteal()'s dst declaration at line 416/417 in its own TDD slice. Keep the second loop and item declaration separate. Do not claim port completion.

Latest run (forced-fresh frontier; coding lane unavailable)

Date: 2026-10-13 UTC

Forced-fresh probe confirms the recorded tuple frontier had advanced: _blake2/blake2s_impl.c compiles, and the first blocker is now Objects/tupleobject.c:_PyTuple_FromArraySteal() at line 408 (PyTupleObject *tuple = tuple_alloc(n)). VC6 emits C2275/C2065 (PyTupleObject/tuple); subsequent errors at lines 410 and 415-418 are further declaration families, left untouched. One focused coding-agent delegation was attempted for only this declaration family with strict TDD, but failed before startup because the Anthropic package is unavailable and lazy installs are disabled. Accordingly, this run is diagnostics-only: no source/test edit or TDD cycle is claimed.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261013-current-frontier/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-current-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-current-frontier/probe.log 2>&1 — actual compiler/probe exit 2. Summary: total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c successfully compiled. First diagnostics: tupleobject.c(408) C2275/C2065 (PyTupleObject/tuple), then line 410 C2143/C2065 i; later distinct destination/item declarations follow. Capture: build/cron-20261013-current-frontier/probe.log.
Focused coding-agent delegation — failed before child startup: required anthropic package unavailable; lazy installs disabled. No child edits occurred.
Existing applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all five existing tupleobject tests passed. No new test for _PyTuple_FromArraySteal() was added.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md — exit 0.
No standalone compiler banner, linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is probe progress only, not port completion.

Files changed this run: PORT_STATUS.md only; diagnostic capture is under build/. Next frontier: when a coding lane can start, TDD only the line-408 tuple declaration, preserving its evaluation after the n == 0 return; then run focused VC6 probe and tupleobject regressions. Leave loop and destination declarations separate.

Latest run (`_PyTuple_FromArray()` loop-index declaration; frontier advances)

Date: 2026-10-13 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain CPython reference before acting. Preserved existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Exact CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh MSVC600/Wine probe confirmed the previous destination declaration fix and advanced to the next isolated defect: _PyTuple_FromArray()'s C99 loop index declaration at line 392. One focused Codex CLI lane (0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a13575-b737-7212-918b-235d4922a919) followed strict TDD. It updated the existing focused scripts/vc6-tupleobject-from-array-c89.test.py; the RED run failed at the intended assertion because i was absent from the declaration block. The only production change hoists Py_ssize_t i into that block and changes the loop initializer to i = 0. Loop condition/increment, item acquisition, INCREF/store, GC tracking, error/early-return behavior remain unchanged; no other function was changed. No existing changes were reset, cleaned, stashed, discarded, or overwritten. This status file was not touched by the coding lane.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh: mkdir -p build/cron-20261013-index-frontier/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-index-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-index-frontier/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors at tupleobject.c(392) were C2143 and C2065 i; subsequent diagnostics were at distinct locations. Full capture: build/cron-20261013-index-frontier/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-from-array-c89.test.py before production edit — exit 1 on expected missing i declaration assertion.
Focused GREEN and applicable regressions: python3 scripts/vc6-tupleobject-from-array-c89.test.py; for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all five tupleobject tests passed.
Post-change forced-fresh: mkdir -p build/cron-20261013-index-frontier-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-index-frontier-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-index-frontier-after/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled and the changed _PyTuple_FromArray() passes. Its previous line-392 diagnostics are gone. The first remaining errors advance into the distinct _PyTuple_FromArraySteal() function at line 408 (C2275/C2065 tuple), followed by its loop i declaration and dst declaration diagnostics; left untouched. Capture: build/cron-20261013-index-frontier-after/probe.log.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only _PyTuple_FromArray() loop-index declaration split), scripts/vc6-tupleobject-from-array-c89.test.py (focused C89/order expectation), and this status entry. Next frontier: force-fresh probe before editing; if unchanged, isolate only the first _PyTuple_FromArraySteal() declaration defect family, leaving its later loop/destination declarations for separate slices. No completed port is claimed.

Latest run (`_PyTuple_FromArray()` destination declaration; frontier advances)

Date: 2026-10-13 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded _PyTuple_FromArray() destination declaration frontier was force-reprobed before editing and confirmed: _blake2/blake2s_impl.c compiled, then VC6 reported tupleobject.c(390) C2275 (PyObject), C2065 (dst), and C2100. A focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a134fc-f2d8-7d63-bbf7-7a7decfe9e6c) used strict TDD. It first updated scripts/vc6-tupleobject-from-array-c89.test.py; the test failed before production change with the expected assertion that dst must be declared before the empty-tuple check. The sole new production change hoists PyObject **dst to _PyTuple_FromArray()'s declaration block and assigns dst = tuple->ob_item immediately after the successful allocation NULL check. The loop index and item declarations, evaluation/refcount/store/GC order, and error/early-return behavior remain untouched.

Exact verification:

Before-change forced-fresh command: mkdir -p build/cron-20261013-refresh/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-refresh/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: tupleobject.c(390) C2275/C2065/C2100. Capture: build/cron-20261013-refresh/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-from-array-c89.test.py before production edit — exit 1 on the expected missing dst declaration assertion. GREEN: same command after edit — exit 0.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; done — exit 0; all five tests (alloc, dealloc, from-array, new, pack) pass. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-from-array-c89.test.py — exit 0.
Post-change forced-fresh command: mkdir -p build/cron-20261013-refresh-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-refresh-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-refresh-after/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former _PyTuple_FromArray() line-390 dst diagnostics are gone. The first remaining diagnostics advance to line 392, C2143 and C2065 i on the loop's late declaration; later separate tupleobject blockers remain untouched. Capture: build/cron-20261013-refresh-after/probe.log.
Exact CPython tag/commit remain unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This remains compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (the dst declaration/assignment split only), scripts/vc6-tupleobject-from-array-c89.test.py (focused expectation update), and this status entry. Next: force-fresh probe before editing; if unchanged, isolate only the next loop-index declaration in _PyTuple_FromArray() at line 392 in its own TDD slice. Do not claim port completion.

Previous run (fresh tuple frontier; coding-agent prerequisite unavailable)

Date: 2026-10-13 UTC

The recorded _PyTuple_FromArray() line-389 frontier was force-reprobed before any coding. It remains the first stable blocker: _blake2/blake2s_impl.c compiled, then VC6 reported tupleobject.c(390) C2275 (PyObject), C2065 (dst), and C2100; subsequent line-391 diagnostics are cascades from the same late initialized declaration family. One focused coding-agent delegation was attempted as required for implementation, but failed before child startup because the Hermes runtime has no anthropic package and lazy installs are disabled. Consequently this run is diagnostics-only: no TDD RED/GREEN cycle or source/test implementation is claimed. No source work was attempted without the requested coding lane.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261013-current/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013-current/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics at cpython\\Objects\\tupleobject.c(390): C2275, C2065 dst, C2100; cascades follow at line 391. Full capture: build/cron-20261013-current/probe.log.
Focused coding-agent delegation — failed before child startup: missing anthropic; lazy installs disabled. No child edits occurred.
Applicable existing tupleobject regression suite: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all five tests pass (alloc, dealloc, from-array, new, pack). These are pre-existing tests; no new TDD cycle was performed.
git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md — exit 0. Baseline tag/commit verified unchanged.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This remains compiler-probe progress only.

Files changed this run: PORT_STATUS.md only. build/cron-20261013-current/probe.log is a diagnostic artifact. Next frontier: resolve the coding-agent provider prerequisite, then use one strict-TDD slice for only _PyTuple_FromArray()'s dst declaration, preserving its evaluation point after successful tuple allocation; rerun the focused VC6 probe and applicable regression suite. Leave the subsequent loop declaration and other tupleobject blockers separate.

Latest run (`_PyTuple_FromArray()` first declaration hoisted; frontier advances)

Date: 2026-10-13 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded tupleobject frontier was force-reprobed before editing and confirmed: _blake2/blake2s_impl.c compiled, then Objects/tupleobject.c(385) failed on the late initialized PyTupleObject *tuple declaration (C2275/C2065). One focused Codex CLI lane (codex-cli 0.153.4, logged in, workspace-write/ephemeral) implemented only this declaration family using TDD. The new regression's RED failed with the expected assertion before the production change. The edit hoists PyTupleObject *tuple;, assigning tuple = tuple_alloc(n); at the original point after the n == 0 early return. Distinct dst, i, and item declarations and all operation/refcount/error order remain unchanged. The coding lane's preservation snapshot covered 4,804 paths across both repositories; only the intended CPython source and new focused test differ. No unrelated existing modifications were changed.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-reprobe/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: tupleobject.c(385) C2275 (PyTupleObject) and C2065 (tuple); later distinct declarations at lines 389-390 remain. Capture: build/cron-current-reprobe/probe.log.
TDD RED/GREEN: python3 scripts/vc6-tupleobject-from-array-c89.test.py — exit 1 before the production edit at the intended declaration-order assertion, then exit 0 after it.
Applicable regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit $?; done — exit 0; all five tupleobject scripts pass, including _PyTuple_FromArray().
Initial post-change forced-fresh attempt in the coding lane exited 1 before compilation because Wine failed to create a lock under /run/user/1000 (Read-only file system). Wine smoke check XDG_RUNTIME_DIR="$PWD/build/cron-current-coder/retry-runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c ver then exited 0 (Microsoft Windows 10.0.19043). Retried the forced-fresh command using that project-local runtime and captured build/cron-current-coder/probe-retry.log; actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled, and the former line-385 errors are gone. The next first blocker is tupleobject.c(390) C2275/C2065 (PyObject/dst); other separate tupleobject blockers remain untouched.
git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- PORT_STATUS.md scripts/vc6-tupleobject-from-array-c89.test.py — exit 0. Exact baseline tag/commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (one declaration/assignment split), new scripts/vc6-tupleobject-from-array-c89.test.py, and this status entry. Next: force-fresh probe before editing; if unchanged, address only the next first blocker in _PyTuple_FromArray() (dst at line 389), in a separate TDD slice. Do not claim a completed port.

Previous run (fresh tupleobject frontier re-probe; no coding agent available)

Date: 2026-10-13 UTC

Forced-fresh MSVC600/Wine re-probe confirms the recorded _PyTuple_FromArray() frontier at line 385 remains the first stable blocker. A focused coding-agent lane was not started: codex-cli 0.153.4 is installed, but the required delegation tool/provider is not available to this scheduled runtime. Per the workflow, this is diagnostics-only: no source or test edits and no TDD cycle are claimed. The subsequent declaration families at lines 389-390 and other tupleobject functions remain distinct and untouched.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261013T-run/reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013T-run/reprobe/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: Objects/tupleobject.c(385) C2275 (PyTupleObject) and C2065 (tuple). Later same-function errors at lines 389-390 and separate tupleobject blockers follow. Capture: build/cron-20261013T-run/reprobe/probe.log.
Baseline verified: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed this run: PORT_STATUS.md only. Next: delegate one isolated TDD slice for _PyTuple_FromArray()'s declaration at line 385 once the coding-agent lane is available; preserve evaluation timing and leave the distinct declarations at 389-390 untouched. No completed port is claimed.

Previous latest run (`tupledealloc()` C89 index declaration; frontier advances)

Date: 2026-10-13 UTC

Forced-fresh MSVC600/Wine source-list probe confirmed the recorded tupleobject frontier had advanced beyond PyTuple_New(): _blake2/blake2s_impl.c compiled, and the first stable blocker was the late initialized Py_ssize_t i in tupledealloc() after Py_TRASHCAN_BEGIN. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a13321-82e3-7b70-9085-e1247494109e) used strict TDD. New scripts/vc6-tupleobject-dealloc-c89.test.py failed before the production edit with the expected assertion that i must be declared before the initial empty-tuple checks. The sole production change declares i at function entry and retains i = Py_SIZE(op); immediately after Py_TRASHCAN_BEGIN; decref, freelist/free, and trashcan ordering are unchanged. The lane captured hashes for all pre-existing dirty/untracked paths in both repositories and verified they remained byte-identical; only the intended CPython edit and new test were added.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261013T-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors: tupleobject.c(209) C2143 and (210) C2065 i; subsequent independent errors included tuplerepr line 221 and later tupleobject functions. Full capture: build/cron-20261013T-current/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-dealloc-c89.test.py before production edit — exit 1 on the intended declaration-placement assertion. GREEN: same command after edit — exit 0.
Applicable regression loop: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all four scripts (alloc, dealloc, new, pack) pass. Scoped git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-dealloc-c89.test.py — both exit 0. Diff/snapshot inspection confirms the only production changes are the intended declaration/assignment split and all pre-existing work was preserved.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261013T-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former tupledealloc() line-209/210 diagnostics are gone. First remaining errors advance to Objects/tupleobject.c(385) C2275/C2065 on the late initialized PyTupleObject *tuple in _PyTuple_FromArray(); separate later C89 declarations in that function and other tupleobject functions remain untouched. Full capture: build/cron-20261013T-post-probe.log.
Exact baseline tag/commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only tupledealloc() index declaration split), new scripts/vc6-tupleobject-dealloc-c89.test.py, and this status entry. Next frontier: force-fresh probe before editing; if unchanged, isolate the first _PyTuple_FromArray() blocker at line 385 in its own TDD slice. No completed port is claimed.

Latest run (`PyTuple_New()` C89 loop declaration; frontier advances)

Date: 2026-10-12 17:58 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 skill reference before acting. Preserved pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded tupleobject frontier was force-reprobed. _blake2/blake2s_impl.c compiled, and the prior PyTuple_New() C99 loop declaration at line 80 is confirmed as the first blocker. One focused Codex CLI lane (codex-cli 0.153.4, session 01a13148-65d0-7250-a18e-5b4a768dcaa8) followed TDD. New scripts/vc6-tupleobject-new-c89.test.py failed before the source edit (exit 1) on the intended declaration assertion. The sole source change hoists Py_ssize_t i into the declaration block and changes only the for initializer to assign i = 0; iteration and tuple initialization order remain unchanged. Both tupleobject-specific regression scripts pass. The child’s first probe attempt exited 1 before compilation due Wine server lock creation; Hermes independently reran the forced-fresh probe with a fresh project-local runtime directory.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T175809Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors were the recorded tupleobject.c(80) C2143/C2065/C2059 family.
TDD RED: python3 scripts/vc6-tupleobject-new-c89.test.py — exit 1, intended assertion on missing function-scope i declaration.
TDD GREEN and focused regressions: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; done — both vc6-tupleobject-alloc-c89.test.py and vc6-tupleobject-new-c89.test.py exit 0. A snapshot diff confirmed no tupleobject changes outside this function; PORT_STATUS.md checksum was unchanged during coding.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T175809Z-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled and the PyTuple_New() line-80 diagnostics are gone. The next first errors are Objects/tupleobject.c(168) C2275/C2065 on late-initialized PyTupleObject *result in PyTuple_Pack(); later independent tupleobject errors remain untouched. Full before/after captures: build/cron-20261012T175809Z/probe.log and build/cron-20261012T175809Z-after/probe.log.
The exact baseline tag/commit remains unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (the PyTuple_New() loop index declaration only), new scripts/vc6-tupleobject-new-c89.test.py, and this status entry. Next: force-fresh probe before edits, then consider only the newly confirmed PyTuple_Pack() declaration at line 168 in a separate TDD slice; keep later blockers separate. No completed port is claimed.

Latest run (tupleobject frontier reconfirmed; coding lane unavailable)

Date: 2026-10-12 13:36 UTC

The recorded tuple_alloc() frontier was force-reprobed before any edits and remains current. _blake2/blake2s_impl.c compiles. The first stable errors are Objects/tupleobject.c(43) C2275 (PyTupleObject) and C2065 (op) on PyTupleObject *op = maybe_freelist_pop(size);. Distinct later diagnostics include a C99 loop declaration at line 79 and further tupleobject issues; none were changed. One focused coding-agent delegation was attempted for only line 43, but failed before child startup because the Hermes runtime requires the unavailable anthropic Python package and lazy installs are disabled. Thus this was diagnostics-only: no TDD RED/GREEN cycle, source/test changes, or regression tests are claimed.

Exact verification:

mkdir -p build/cron-20261012T133609Z/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012T133609Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T133609Z/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: tupleobject.c(43) C2275/C2065; separate line-79 C2143/C2065/C2059 diagnostics follow. Full log: build/cron-20261012T133609Z/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Focused coding delegation — failed before child startup: missing anthropic; lazy installs disabled. No child edits or test runs occurred.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress only; no port completion is claimed. Next: retry the single TDD slice for tuple_alloc() line 43 when a coding-agent provider can start, preserving the maybe_freelist_pop(size) evaluation point; keep line 79 and later tupleobject blockers separate.

Previous run (tupleobject frontier reconfirmed; coding lane unavailable)

Date: 2026-10-12 UTC

The recorded structseq frontier was force-reprobed before editing. _blake2/blake2s_impl.c and Objects/structseq.c compile; the current first blocker is Objects/tupleobject.c:tuple_alloc() at line 43, on the late initialized declaration PyTupleObject *op = maybe_freelist_pop(size);. One focused coding-subagent delegation was attempted for this single declaration family using installed codex-cli 0.153.4, but failed before child startup because the Hermes runtime requires the unavailable anthropic Python package and lazy installs are disabled. No source/test change or TDD RED/GREEN cycle was made; this run is diagnostics-only. The existing changes and subsequent tupleobject diagnostics were left untouched.

Exact verification:

mkdir -p build/cron-20261012Tcurrent-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012Tcurrent-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012Tcurrent-reprobe/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors: tupleobject.c(43) C2275 (PyTupleObject) and C2065 (op), with cascading warnings. The next distinct diagnostics include line 79; later errors in that file were not addressed. Full capture: build/cron-20261012Tcurrent-reprobe/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Outer and detached repository pre-existing changes were present and preserved.
Focused coding-agent delegation — failed before child startup: anthropic package unavailable; lazy installs disabled. No child edits or tests occurred. No focused tupleobject regression script exists in scripts/ at this time.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: retry one focused TDD coding lane for only the tuple_alloc() declaration at line 43 once the coding-agent provider can start; preserve the maybe_freelist_pop(size) evaluation point and leave the distinct line-79 and later tupleobject blockers separate.

Latest run (`_PyStructSequence_NewType()` C89 slot initialization; frontier advances)

Date: 2026-10-12 UTC

The recorded structseq designated-initializer frontier was first force-reprobed. Initial invocation failed before compilation because Wine could not create its server lock (/run/user/1000/wine/server-801-136fb0/lock); wine cmd /c ver then succeeded when run with a project-local XDG_RUNTIME_DIR. The exact forced-fresh probe was retried successfully. _blake2/blake2s_impl.c compiled; the prior structseq.c designated-initializer C2059 diagnostics at lines 590-597 were current. One focused Codex CLI implementation lane (codex-cli 0.153.4, session 01a12f6b-00a0-78a3-95e0-f1c894f09703, workspace-write/ephemeral) followed test-first workflow. New scripts/vc6-structseq-newtype-slots-c89.test.py failed before the source change on the compound literals. The production change replaced only eight compound-literal assignments with .slot and .pfunc field assignments; slot values, order, casts, and zero sentinel are preserved. PyStructSequence_NewType() and all other source regions were left unchanged. Independent baseline hash check captured 4,799 tracked/untracked files across both repos before coding and verified all previously existing file contents remained unchanged except the intended cpython/Objects/structseq.c edit; PORT_STATUS.md was not edited by the coding lane.

Exact verification:

Initial forced-fresh command at build/cron-20261012T-current: exit 2; total=107 compiled=106 cached=0 skipped=0, _blake2/blake2s_impl.c compiled. First stable errors were Objects/structseq.c(590-597) C2059 on the compound-literal braces; separate later errors were in PyStructSequence_NewType() at lines 624-626. Capture: build/cron-20261012T-current/probe.log.
TDD RED: python3 scripts/vc6-structseq-newtype-slots-c89.test.py before production edit — exit 1 with the intended assertion rejecting compound literals. GREEN: same command after edit — exit 0; exact eight slot pairs and ordering verified.
Focused regressions: for test in scripts/vc6-structseq-*.test.py; do python3 "$test" cpython/Objects/structseq.c || exit; done — all nine scripts exited 0. Host python3 cpython/Lib/test/test_structseq.py — 17 tests, exit 0; python3 cpython/Lib/test/_test_embed_structseq.py — 2 tests, exit 0. These host tests do not compile or execute the edited C source.
Scoped whitespace checks: git -C cpython diff --check -- Objects/structseq.c and git diff --check -- scripts/vc6-structseq-newtype-slots-c89.test.py — both exit 0. Byte/hash comparison confirmed only the intended slot initialization changed among pre-existing paths.
Post-change forced-fresh command: mkdir -p build/cron-20261012T-current-post/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-current-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-current-post/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former structseq.c designated-initializer diagnostics are gone; the first stable blocker advances to Objects/tupleobject.c beginning at line 43 (C2275/C2065 declaration diagnostics), with further C89 declaration/initializer diagnostics later in that file. Capture: build/cron-20261012T-current-post/probe.log.
Exact CPython tag and commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/structseq.c (only _PyStructSequence_NewType() slot assignments), new scripts/vc6-structseq-newtype-slots-c89.test.py, and this status entry. Next: force-fresh probe before editing, then address only the newly confirmed first Objects/tupleobject.c blocker in a separate TDD slice; leave subsequent tupleobject diagnostics separate. No port completion is claimed.

Previous run (`initialize_structseq_dict()` C89 declaration family; frontier advances)

Date: 2026-10-12 07:15 UTC

Read PORT_STATUS.md, README.md, and the applicable CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all existing root and detached CPython modifications; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded frontier was force-reprobed before editing. _blake2/blake2s_impl.c compiled. The first stable MSVC600/Wine diagnostics were in Objects/structseq.c:initialize_structseq_dict() at line 408 (C2143), line 409 (C2275/C2065 for keys), and line 414 (undeclared i/k), with a separate late new_member declaration at line 418. One focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI, workspace-write/ephemeral; session 01a12ef1-6c60-78d2-bb6f-769f8a2e7a91) followed TDD. New scripts/vc6-structseq-initialize-structseq-dict-c89.test.py failed before production edits as expected on the declaration placements. The lane hoisted only i, k, and uninitialized keys to the function declaration block and new_member to the loop's declaration block; tuple and Unicode allocation calls remain at their original execution points. Metadata writes, checks, continue, reference handling, resize, insertion, and cleanup order are preserved. Snapshot verification found all 179 pre-existing changed/untracked files unchanged, PORT_STATUS.md untouched during coding, and source outside this function unchanged.

Exact verification:

Before-change forced-fresh command: mkdir -p build/cron-20261012T-current/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-current/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors: structseq.c(408) C2143, (409) C2275/C2065 (PyObject/keys), (414) C2065 (i/k); independent later declaration errors at (418-419) and designated-initializer C2059 at (588-595). Capture: build/cron-20261012T-current/probe.log.
TDD RED: python3 scripts/vc6-structseq-initialize-structseq-dict-c89.test.py before source edit — exit 1, expected failure on late declarations. GREEN — exit 0.
Focused and all scripts/vc6-structseq-*.test.py: exit 0 for all eight tests (dealloc, initialize-structseq-dict, new, repr, repr-name, repr-name-utf8, repr-value-repr, traverse). git -C cpython diff --check -- Objects/structseq.c and git diff --check -- PORT_STATUS.md scripts/vc6-structseq-initialize-structseq-dict-c89.test.py — exit 0. The new-file git diff --no-index --check /dev/null ... returns 1 because it signals differing content, with no diagnostics; not counted as a pass.
Post-change forced-fresh command: mkdir -p build/cron-20261012T-current-post/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-current-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-current-post/probe.log 2>&1 — actual probe exit 2; summary remains total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c and structseq.c compiled. The former line-408/409/414/418 declaration diagnostics are gone. The next first compiler diagnostics are C2059 designated-initializer errors at structseq.c(590-597); later PyStructSequence_NewType diagnostics at (624-627) remain separate. Capture: build/cron-20261012T-current-post/probe.log.
Exact CPython tag/commit verified unchanged. The MSVC environment invocation did not yield a standalone compiler banner. No pythoncore.dll/python.exe link, Wine interpreter run, or real Windows 98 SE execution was produced. This is compiler-probe progress only, not a completed port.

Files changed by this slice: cpython/Objects/structseq.c (declaration placement only within initialize_structseq_dict()), new scripts/vc6-structseq-initialize-structseq-dict-c89.test.py, and this status entry. Next: force-fresh probe first, then isolate only the current structseq.c designated-initializer family at lines 590-597 in a separate TDD slice. Leave the later PyStructSequence_NewType blocker untouched.

Latest run (`structseq_repr()` value/repr C89 declarations; frontier advances)

Date: 2026-10-12 05:02 UTC

The previously recorded frontier was force-reprobed before changes. _blake2/blake2s_impl.c compiled; the first blocker remained Objects/structseq.c:structseq_repr() at lines 296 and 298, where late PyObject *value and PyObject *repr declarations produce C2275/C2065. One focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a12e78-6932-7e01-bb77-3fb2d756177c) followed TDD. New scripts/vc6-structseq-repr-value-repr-c89.test.py failed before production edits as expected because the declarations were not in the function declaration block. The lane hoisted only value and repr; assignments remain immediately after = output and after borrowed value lookup, respectively. Refcount, error, evaluation, and output order are unchanged. Updated the directly applicable existing vc6-structseq-repr-name-c89.test.py source expectation from declaration-with-initializer to the equivalent assignment.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-run/probe-before/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-run/probe-before.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors: C2275/C2065 at structseq.c(296) for value and (298) for repr, with cascading warnings. Capture: build/cron-20261012T-run/probe-before.log.
TDD RED: python3 scripts/vc6-structseq-repr-value-repr-c89.test.py before production edit — exit 1, expected assertion that value and repr must be declared in the function entry declaration block.
Focused GREEN and all applicable structseq regressions: for test in scripts/vc6-structseq-*.test.py; do python3 "$test"; done — all seven tests exit 0: dealloc, new, repr loop, repr name, repr name UTF-8, new value/repr regression, and traverse. Nested and outer scoped git diff --check — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-run/probe-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-run/probe-after.log 2>&1 — actual probe exit 2; summary remains total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The previous structseq_repr() diagnostics at 296/298 are gone. First remaining errors advance to structseq.c(408) C2143, then C2275/C2065 for keys at (409) and undeclared i/k at (414); later independent new_member declaration errors at (418-419), designated initializers (588-595), and additional errors remain untouched. Capture: build/cron-20261012T-run/probe-after.log.
Exact baseline tag/commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c, scripts/vc6-structseq-repr-value-repr-c89.test.py (new), scripts/vc6-structseq-repr-name-c89.test.py (updated), and this status entry. Compiler-probe progress only, not a completed port. Next: force-fresh probe before editing; if unchanged, isolate only the current structseq.c declaration family beginning at line 408. Do not combine the later new_member declaration or designated-initializer blockers.

Previous run (`structseq_repr()` loop-local name declaration; frontier advances)

Date: 2026-10-12 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh MSVC600/Wine reprobe confirmed the recorded frontier. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2275/C2065 at Objects/structseq.c(281) on the late PyObject *name; later diagnostics in this file included value at (295), repr at (297), declaration families at (405-416), designated initializers at (585-592), and additional later errors. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a12dfe-caaa-71a2-a2d7-4885dc081db2) used strict TDD. New scripts/vc6-structseq-repr-name-c89.test.py failed before production edits with the expected assertion that name must be declared at the start of the loop body. The sole production change hoists PyObject *name; alongside name_utf8 and changes the original declaration-with-initializer into an assignment at its original point, preserving decoding, error handling, reference counts, and operation order. Updated the directly applicable existing vc6-structseq-repr-name-utf8-c89.test.py assertion to reflect the new legal declaration and unchanged assignment order.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-current/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors: C2275/C2065 at structseq.c(281); later independent errors as listed above. An initial invocation exited 1 before probing because the output directory did not exist; the logged command succeeded after creating it. Capture: build/cron-20261012T-current/probe.log.
TDD RED: python3 scripts/vc6-structseq-repr-name-c89.test.py before production edit — exit 1 at the intended assertion that name must be declared before loop-body statements.
Focused and all applicable structseq regressions: for test in scripts/vc6-structseq-*.test.py; do python3 "$test"; ...; done — all six scripts exit 0: dealloc, new, repr, repr-name, repr-name-utf8, and traverse. The existing name-UTF8 test was updated because its prior assertion encoded the now-fixed declaration layout; it passes unchanged behavioral/order checks with the hoisted declaration.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-post/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. The former name diagnostics at line 281 are gone. First remaining structseq.c diagnostics advance to C2275/C2065 at (296) for value and (298) for repr; later errors include declaration families at (406-417), designated initializers (586-593), and additional blockers. Capture: build/cron-20261012T-post/probe.log.
git diff --check -- PORT_STATUS.md scripts/vc6-structseq-repr-name-c89.test.py scripts/vc6-structseq-repr-name-utf8-c89.test.py and git -C cpython diff --check -- Objects/structseq.c — exit 0. CPython tag and commit verified unchanged. The compiler output did not provide a standalone banner. No linked pythoncore.dll/python.exe, Wine interpreter run, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c (only the name declaration/assignment split), new scripts/vc6-structseq-repr-name-c89.test.py, updated scripts/vc6-structseq-repr-name-utf8-c89.test.py, and this status entry. Compiler-probe progress only, not a completed port. Next: force-fresh probe before edits; if unchanged, isolate only the first remaining structseq_repr() declaration family (value / repr) as a separate TDD slice. Do not combine the later initialize_structseq_dict() or static initializer blockers.

Previous run (`structseq_repr()` loop-local name declaration; frontier advances)

Date: 2026-10-12 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/structseq.c frontier was force-reprobed before editing. _blake2/blake2s_impl.c compiled; the first stable diagnostics were C2143 at Objects/structseq.c(273) before const, then C2065 name_utf8 at (274). One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a12d85-f68c-7213-9d0e-1443aa553b25) used strict TDD. New scripts/vc6-structseq-repr-name-utf8-c89.test.py failed before production edits with expected assertion that name_utf8 must be declared before loop-body statements. The sole production change declares const char *name_utf8; at the top of the for body and leaves name_utf8 = typ->tp_members[i].name; at its original point, after separator output. NULL checking, error handling, and decode order remain unchanged. The lane's byte-hash check confirmed all 175 other pre-existing dirty files, including this status file, remained unchanged during implementation.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T002656Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T002656Z/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at structseq.c(273) and C2065 name_utf8 at (274). Capture: build/cron-20261012T002656Z/probe.log.
TDD RED: python3 scripts/vc6-structseq-repr-name-utf8-c89.test.py before production edit — exit 1, expected assertion VC6 requires name_utf8 declared before loop-body statements.
GREEN and all scripts/vc6-structseq-*.test.py: exit 0 for dealloc, new, repr, new repr-name-utf8, and traverse. Byte-preservation and exact-source-diff verification — exit 0 (175 other pre-existing dirty files unchanged; source contains only the intended declaration/assignment transformation).
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T002656Z-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T002656Z-post/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c still compiles; the former diagnostics at lines 273-274 are gone. First remaining diagnostics advance to Objects/structseq.c(281) C2275 PyObject / C2065 name; independent later diagnostics include (295) value, (297) repr, (405-416) declaration families, designated initializer C2059 at (585-592), and later errors. Capture: build/cron-20261012T002656Z-post/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only, not a completed port.

Files changed this slice: cpython/Objects/structseq.c (one loop-local declaration split), new scripts/vc6-structseq-repr-name-utf8-c89.test.py, and this status entry. Next: force-fresh probe before edits; if unchanged, isolate only the first structseq_repr() late PyObject *name declaration at line 281 as a separate TDD slice. Do not combine the later value, repr, API, or initializer blockers.

Latest run (`structseq_dealloc()` C89 declaration; frontier advances)

Date: 2026-10-11 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded _blake2 frontier was stale. A forced-fresh MSVC600/Wine probe compiled _blake2/blake2s_impl.c; the first blocker was Objects/structseq.c:structseq_dealloc() at line 109, a late initialized PyTypeObject *tp = Py_TYPE(obj); declaration. One focused Codex CLI lane (codex-cli 0.153.4, session 01a12c93-588b-7061-9f8d-45efe50670d9, workspace-write/ephemeral) followed TDD. New scripts/vc6-structseq-dealloc-c89.test.py failed before source edits with the expected assertion that tp must be declared before GC untracking. The only production edit hoists PyTypeObject *tp; into the declaration block and changes the original declaration to tp = Py_TYPE(obj); immediately after PyObject_GC_UnTrack(obj), preserving assignment timing and teardown order. No unrelated files were changed by the lane.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T200205Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T200205Z/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics were C2275/C2065 at structseq.c(109) (PyTypeObject/tp). Capture: build/cron-20261011T200205Z/probe.log.
TDD RED: python3 scripts/vc6-structseq-dealloc-c89.test.py before the production edit — exit 1, expected assertion that tp must be declared before GC untracking.
Focused GREEN and applicable regressions: python3 scripts/vc6-structseq-dealloc-c89.test.py, python3 scripts/vc6-structseq-new-c89.test.py, and python3 scripts/vc6-structseq-traverse-c89.test.py — all exit 0. git -C cpython diff --check -- Objects/structseq.c and git diff --check -- scripts/vc6-structseq-dealloc-c89.test.py — both exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T201000Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T201000Z/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. The prior structseq_dealloc() line-109 errors are gone; the first blocker advances to line 263 in Objects/structseq.c (C2143 declaration/statement diagnostics and C2065 i), with other later independent diagnostics still present. Capture: build/cron-20261011T201000Z/probe.log.
Exact CPython tag and commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c (only structseq_dealloc() declaration/assignment), new scripts/vc6-structseq-dealloc-c89.test.py, and this status entry. Compiler-probe progress only, not a completed port. Next: force-fresh probe before editing; if unchanged, isolate only the first structseq.c declaration family now at line 263. Do not conflate compilation progress with linked or target-running interpreter acceptance.

Latest run (`PySlice_New()` C89 declaration placement; frontier advances)

Date: 2026-10-11 UTC

The previously recorded _blake2/sliceobject.c frontier was force-reprobed before editing using MSVC600 under Wine. _blake2/blake2module.c, _blake2/blake2b_impl.c, and _blake2/blake2s_impl.c compile. The first stable diagnostics remain the PySlice_New() late declarations: C2275/C2065 for PyInterpreterState *interp at line 126 and PySliceObject *obj at line 127, followed by cascading member-access errors. One focused Codex CLI coding lane (codex-cli 0.153.4, session 01a12a3d-7607-7211-96a7-1a0449318525, workspace-write/ephemeral) followed strict TDD. New regression scripts/vc6-sliceobject-py-slice-new-c89.test.py failed before production edits at its expected assertion (interp must be declared at function entry). The only production change moved declarations of interp and obj to the start of PySlice_New() and changed the interpreter lookup to an assignment at its original point after the null-to-None normalization. Allocation, cache behavior, refcounts, and remaining function bodies were not changed. No unrelated existing work was changed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T-slice-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T-slice-reprobe/probe-before.log 2>&1 — probe exit 2; summary total=106 compiled=105 cached=0 skipped=0. First errors in sliceobject.c: C2275/C2065 at line 126 (PyInterpreterState/interp), C2275/C2065 at line 127 (PySliceObject/obj), followed by C2223 cascades at lines 128-130. Later independent declaration diagnostics occurred at lines 600, 608, and 617. Capture: build/cron-20261011T-slice-reprobe/probe-before.log.
TDD RED: python3 scripts/vc6-sliceobject-py-slice-new-c89.test.py cpython/Objects/sliceobject.c — exit 1, expected assertion interp must be declared at function entry.
Focused GREEN: same command after edit — exit 0, PySlice_New C89 declaration placement and lookup: PASS. This is the only directly applicable focused regression found; no other sliceobject C89 scripts exist.
Applicable CPython runtime suite attempt: PYTHONDONTWRITEBYTECODE=1 PYTHONPATH=cpython/Lib python3 -m unittest test.test_slice — exit 1 during import, AssertionError: SRE module mismatch because host Python is 3.14.7 while checkout is CPython 3.11.16. /usr/bin/python3 (3.14.4) was also tried and fails with the same mismatch. No built CPython interpreter is present, so runtime slice tests remain unverified.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T-slice-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T-slice-post/probe.log 2>&1 — probe exit 2; summary total=106 compiled=105 cached=0 skipped=0. The prior PySlice_New() diagnostics at lines 126-130 are gone. The first remaining diagnostics advance to lines 602, 610, and 619 (PyObject late declarations for t1, t2, and res); left untouched as a separate defect family. Capture: build/cron-20261011T-slice-post/probe.log.
git -C cpython diff --check -- Objects/sliceobject.c and git diff --check -- scripts/vc6-sliceobject-py-slice-new-c89.test.py — exit 0. Baseline tag and commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/sliceobject.c (only PySlice_New() declarations/assignment), new scripts/vc6-sliceobject-py-slice-new-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next: force-fresh probe before editing and, if unchanged, isolate only the first remaining sliceobject.c late-declaration family (around line 602) with a new TDD test. Do not claim port completion.

Latest run (`PySet_Type`/`PyFrozenSet_Type` positional initializer; frontier advances)

Date: 2026-10-11 05:00 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior recorded setobject.c declaration blocker was not current: a forced-fresh MSVC600/Wine probe compiled _blake2/blake2s_impl.c and Objects/setobject.c; the only reported errors in that file were C2059 on designated .tp_vectorcall initializers at lines 2188 and 2289. One focused Codex CLI lane (codex-cli 0.153.4, session 01a12951-3465-7492-b050-43f906e76593, workspace-write/ephemeral) used strict TDD. The new regression's pre-edit RED failed as expected at both designators under strict C89. Only these two initializer entries changed: nine intervening PyTypeObject fields are explicitly zeroed in actual declaration order, and each original vectorcall function remains in tp_vectorcall. The new regression compiles both actual initializers as strict C89 and verifies all 48 field mappings against the checkout's PyTypeObject layout. Hash comparison confirms pre-existing files remained unchanged except the intended source edits; PORT_STATUS.md and compatibility patches were untouched during the coding lane.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-recheck/probe.log 2>&1 — probe exit 2; summary total=105 compiled=104 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The first/only errors in setobject.c were C2059 at lines 2188 and 2289. Capture: build/cron-current-recheck/probe.log.
TDD RED: python3 scripts/vc6-setobject-type-vectorcall-c89.test.py cpython/Objects/setobject.c before the source edit — exit 1 with expected C90 designated-initializer errors at both vectorcall entries.
Focused GREEN and applicable regressions: python3 scripts/vc6-setobject-type-vectorcall-c89.test.py cpython/Objects/setobject.c plus every scripts/vc6-setobject-*.test.py with cpython/Objects/setobject.c — all seven tests exit 0. Both type initializers pass all 48 semantic field mappings; setiter_reduce passes eight cases. git diff --check and git -C cpython diff --check -- Objects/setobject.c — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current-recheck-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-recheck-post/probe.log 2>&1 — probe exit 2; summary total=106 compiled=105 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/setobject.c compile; former setobject C2059 errors are gone. The first reported blocker advances to C2275/C2065 at Objects/sliceobject.c(126-130), followed by independent late-declaration families at lines 141, 600, 608, and 617. Capture: build/cron-current-recheck-post/probe.log. An initial post-probe invocation lacked its output directory and exited 1 before starting; the recorded successful retry created the directory first.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. The compiler output did not provide a separate compiler banner. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/setobject.c (only the two static type initializer tails), new scripts/vc6-setobject-type-vectorcall-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next: force-fresh probe before editing; if the result is still current, isolate the first Objects/sliceobject.c declaration blocker at line 126 in its own TDD slice. Do not conflate compiler progress with a linked or target-running interpreter.

Latest run (`set_issuperset()` C89 declaration hoisted; frontier advances)

Date: 2026-10-10 22:21 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded first blocker was force-reprobed before editing with MSVC600 under Wine. The prior status named set_update_internal(); current source/probe shows the exact function is set_issuperset() at line 1782. It failed on a late initialized declaration PyObject *key, *it = PyObject_GetIter(other); with C2275/C2065/C2100. One focused Codex CLI lane (codex-cli 0.153.4, session 01a127ec-3e7e-7ba3-9c34-172d872b5aa9, workspace-write/ephemeral) performed strict TDD. The new test failed before production change with the expected missing-entry-declarations assertion. The only production change declares key and it in the function declaration block and moves PyObject_GetIter(other) assignment to the original evaluation point. The set fast path, loop, refcounts, errors, and returns are unchanged. An independent hash/status comparison confirmed exactly two paths changed; all pre-existing outer/nested content and status were preserved.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261010T222104Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T222104Z/probe.log 2>&1 — cl/probe exit 2; summary total=105 compiled=104 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics at Objects/setobject.c(1782): C2275 PyObject, C2065 key and it, C2100 illegal indirection; cascades follow. Later distinct blockers: C2275/C2146/C2065 for Py_ssize_t nargs at line 2021, then C2059 at lines 2183 and 2284. Capture: build/cron-20261010T222104Z/probe.log.
TDD RED: python3 scripts/vc6-setobject-issuperset-c89.test.py cpython/Objects/setobject.c before production change — exit 1, expected assertion that key and it must be declared in the initial block.
Focused GREEN and applicable setobject regressions: python3 scripts/vc6-setobject-issuperset-c89.test.py cpython/Objects/setobject.c, python3 scripts/vc6-setobject-make-new-set-c89.test.py cpython/Objects/setobject.c, python3 scripts/vc6-setobject-setiter-reduce-c89.test.py cpython/Objects/setobject.c, python3 scripts/vc6-setobject-table-resize-c89.test.py cpython/Objects/setobject.c, and python3 scripts/vc6-setobject-frozenset-vectorcall-c89.test.py cpython/Objects/setobject.c — all exit 0. Output confirms the new C89 declaration/ownership check and four existing regressions pass (set iterator includes eight cases). Scoped nested and outer git diff --check — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261010T222104Z/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T222104Z/probe-post.log 2>&1 — cl/probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled and setobject.c now compiles past line 1782. The first remaining error family advances to Py_ssize_t nargs at line 2024: C2275/C2146/C2065. Further distinct designated-initializer errors are C2059 at lines 2186 and 2287. Capture: build/cron-20261010T222104Z/probe-post.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/setobject.c (only set_issuperset() declarations/assignment), new scripts/vc6-setobject-issuperset-c89.test.py, and this status entry. Compiler-probe progress only, not a completed port. Next: forced-fresh probe before editing; if unchanged, handle only the Py_ssize_t nargs declaration family at the current setobject.c line 2024 in its own TDD slice. Do not combine the later designated initializers.

Previous run (fresh `set_issuperset()` blocker confirmed; coding lane unavailable)

Date: 2026-10-10 20:15 UTC

Read PORT_STATUS.md, README.md, and the applicable CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was freshly force-reprobed. The first stable blocker remains in Objects/setobject.c(1782) within set_update_internal(): C2275 PyObject, C2065 key/it, and C2100 illegal indirection; subsequent independent errors occur at line 2021 (Py_ssize_t nargs) and designated initializers at 2183 and 2284. _blake2/blake2s_impl.c compiled. The one focused coding-subagent attempt for only the first blocker failed before startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this run is diagnostics-only: no production or test files were changed, and no TDD RED/GREEN implementation cycle is claimed. Existing directly applicable setobject tests pass. No pre-existing work was modified beyond this status entry.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261010T201500Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T201500Z/probe.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors: setobject.c(1782) C2275/C2065/C2100; distinct later errors at 2021, 2183, and 2284. Capture: build/cron-20261010T201500Z/probe.log.
Focused coding delegation for the confirmed first set_update_internal() blocker — failed before child startup: missing anthropic package; lazy installs disabled. No child edits occurred.
Existing regressions scripts/vc6-setobject-make-new-set-c89.test.py, scripts/vc6-setobject-setiter-reduce-c89.test.py, scripts/vc6-setobject-table-resize-c89.test.py, and scripts/vc6-setobject-frozenset-vectorcall-c89.test.py — all exit 0.
git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/setobject.c — exit 0. Exact baseline tag and commit verified unchanged.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next frontier: retry one focused TDD coding lane for the actual first declaration blocker in set_update_internal() at line 1782; leave the line-2021 and designated-initializer blockers separate.

Previous latest run (fresh frontier moved to `setobject.c`; coding lane unavailable)

Date: 2026-10-10 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c success and setobject.c frontier were freshly checked using the forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c still compiles, but the previously logged frozenset_vectorcall() and later setobject.c diagnostics are stale: the actual first stable compiler errors now start at Objects/setobject.c(1782) inside set_update_internal() (C2275 PyObject, C2065 key and it, followed by C2100 illegal indirection). Further independent diagnostics are C2275/C2146/C2065 for Py_ssize_t nargs at line 2021, then designated-initializer C2059 at lines 2183 and 2284. The one required focused coding-subagent attempt failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this run is diagnostics-only: no TDD RED/GREEN, implementation, or regression test is claimed, and no source/test files were changed. The current first blocker must be inspected and handled as its own TDD slice when the coding lane can start.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261010Tcurrent-next-check/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010Tcurrent-next-check/probe.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: Objects/setobject.c(1782) C2275 on PyObject, C2065 on key and it, then C2100; later distinct errors at lines 2021, 2183, and 2284. Capture: build/cron-20261010Tcurrent-next-check/probe.log.
Focused coding delegation for only the confirmed first setobject.c blocker — failed before child startup: missing anthropic package; lazy installs disabled. No child edits or test runs occurred.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next frontier: use a focused TDD coding lane on the actual first declaration blocker in Objects/setobject.c at line 1782, after confirming the exact function-local semantics; keep later line-2021 and designated-initializer blockers separate. Do not claim a completed port.

Latest run (`make_new_set()` declaration hoisted; frontier advances)

Date: 2026-10-10 UTC

Read this status, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded make_new_set() frontier was force-reprobed before editing using MSVC600 under Wine. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2143 at Objects/setobject.c(957) and C2065 so at (959); the so-> errors at (963-969) cascade from that declaration. One focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a12614-9049-7873-a1f7-849f7702bc90) followed strict TDD. It added a regression checking the declaration placement and preserving assertion/allocation/failure-check order; its pre-edit RED failed as expected because so was after the assertion. The only production edit moved PySetObject *so; before the assertion. Allocation, evaluation, error handling, and all other functions remain unchanged. Snapshot/hash checks confirmed all pre-existing outer/nested dirty and untracked contents plus both staged diffs were preserved.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010Tcurrent-next/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010Tcurrent-next/probe-before.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics C2143 at line 957 and C2065 so at line 959. Capture: build/cron-20261010Tcurrent-next/probe-before.log.
TDD RED: python3 scripts/vc6-setobject-make-new-set-c89.test.py cpython/Objects/setobject.c before production edit — exit 1 with expected assertion so must be declared without initializer before the assertion.
Focused GREEN/regressions: python3 scripts/vc6-setobject-make-new-set-c89.test.py cpython/Objects/setobject.c, python3 scripts/vc6-setobject-setiter-reduce-c89.test.py cpython/Objects/setobject.c, python3 scripts/vc6-setobject-table-resize-c89.test.py cpython/Objects/setobject.c, git diff --check, and git -C cpython diff --check — all exit 0. The new test checks declaration uniqueness and assertion/allocation/failure-check order; setiter regression passes eight cases.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010Tcurrent-next/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010Tcurrent-next/probe-after.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. No diagnostics remain at make_new_set() lines 957-969. The first blocker advances to the distinct frozenset_vectorcall() declaration family at lines 1034-1039 (C2275/C2146/C2065). Further untouched diagnostics occur at lines 1779, 2018, 2180, and 2281. Capture: build/cron-20261010Tcurrent-next/probe-after.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed by this slice: cpython/Objects/setobject.c (one declaration hoist), new scripts/vc6-setobject-make-new-set-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: force-fresh probe before editing; if unchanged, isolate only the first frozenset_vectorcall() C89 declaration blocker at setobject.c(1034) in its own TDD slice. Do not claim port completion.

Latest run (`setiter_reduce()` C89 declaration; frontier advances)

Date: 2026-10-10 11:45 UTC

Read PORT_STATUS.md, README.md, and the relevant CPython Win9x/MSVC6 reference before acting. Preserved pre-existing outer and detached CPython modifications. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Used one focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a1259c-aea6-7783-9904-89049dac951c) for only the first confirmed setobject.c blocker and strict TDD. The new regression's pre-edit RED run failed as expected under strict C89 on the mixed declaration in setiter_reduce(). The only production change hoisted PyObject *list to the function declaration block; list = PySequence_List((PyObject*)&tmp) remains after the iterator-state copy and Py_XINCREF(tmp.si_set), and cleanup/return paths are unchanged. Snapshot verification confirms all 162 pre-existing changed/untracked files' contents stayed byte-identical; only the intended setobject.c edit and new test were added. No other setobject blocker was changed.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010-current/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010-current/probe-current.log 2>&1 — actual probe exit 2; summary total=104 compiled=103 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics were C2275/C2065 at Objects/setobject.c(779) for the late PyObject *list; later distinct diagnostics included make_new_set() at line 956, frozenset_vectorcall() at 1033, set_update_internal() at 1778, and positional-initializer errors at 2179 and 2280. Capture: build/cron-20261010-current/probe-current.log.
TDD RED: python3 scripts/vc6-setobject-setiter-reduce-c89.test.py cpython/Objects/setobject.c before production edit — exit 1, expected ISO C90 forbids mixed declarations and code at PyObject *list = PySequence_List(...).
Focused GREEN and applicable setobject regression tests: python3 scripts/vc6-setobject-setiter-reduce-c89.test.py cpython/Objects/setobject.c and python3 scripts/vc6-setobject-table-resize-c89.test.py cpython/Objects/setobject.c — both exit 0. New test compiles/runs exact extracted function with strict C89 and covers eight reference/evaluation/cleanup/return cases. Scoped nested and outer git diff --check — exit 0.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010-current/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010-current/probe-after.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The prior line-779 diagnostic is gone and Objects/setobject.c compiles past the changed function. First remaining blocker advances to C2143 at Objects/setobject.c(957) (make_new_set() declaration); further untouched diagnostics include lines 1034, 1039, 1779, 2018, 2180, and 2281. Capture: build/cron-20261010-current/probe-after.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed by this slice: cpython/Objects/setobject.c (only setiter_reduce() declaration split), new scripts/vc6-setobject-setiter-reduce-c89.test.py, and this status entry. Compiler-probe progress only: the source-list probe still fails; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly force-reprobe before editing, then isolate only the actual first make_new_set() C89 declaration blocker at line 956 using its own TDD test. Do not claim port completion.

Previous latest run (`PyRange_Type.tp_vectorcall` positional initializer; frontier advances)

Date: 2026-10-10 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded rangeobject frontier was forced-fresh re-probed before editing. _blake2/blake2s_impl.c compiled; VC6's first diagnostic was C2059 at Objects/rangeobject.c(791) on the designated .tp_vectorcall entry. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a12439-49b6-7d73-b375-35a5c504fcbf) followed TDD. It added a regression using the actual PyTypeObject header field order and asserting all 48 semantic fields. The test failed before production edit with the expected C90 designated-initializer error. Only the final PyRange_Type designated entry was replaced with ten explicit zero initializers for tp_free through tp_finalize, then positional (vectorcallfunc)range_vectorcall; no other range initializer or production code changed. Snapshot verification confirmed all pre-existing dirty/untracked files, including the pre-existing PORT_STATUS.md contents, remained unchanged aside from this intended production/test slice.

Exact verification:

Before-change command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010-current/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010-current/probe-before.log 2>&1 — actual probe exit 2; total=104 compiled=103 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic C2059 at Objects/rangeobject.c(791) on .. Capture: build/cron-20261010-current/probe-before.log.
TDD RED: python3 scripts/vc6-rangeobject-vectorcall-c89.test.py cpython/Objects/rangeobject.c before source edit — exit 1, expected ISO C90 forbids specifying subobject to initialize for .tp_vectorcall.
Focused GREEN and rangeobject regressions: python3 scripts/vc6-rangeobject-vectorcall-c89.test.py cpython/Objects/rangeobject.c, python3 scripts/vc6-rangeobject-number-c89.test.py cpython/Objects/rangeobject.c, and python3 scripts/vc6-rangeobject-index-c89.test.py cpython/Objects/rangeobject.c — all exit 0; all 48 type fields, all 36 number slots, and nine range-index cases pass. git diff --check and git -C cpython diff --check -- Objects/rangeobject.c — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261010-current/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010-current/probe-after.log 2>&1 — actual probe exit 2; total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The changed rangeobject.c blocker is gone; first stable diagnostics advance to Objects/setobject.c(244) C2143 and (245) C2065 newsize, followed by further distinct blockers in setobject.c. Capture: build/cron-20261010-current/probe-after.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. The coding lane's hash/status snapshot check and independent diff review passed: 158 previously dirty/untracked files retained byte-for-byte; only the intended CPython source modification and new test added.

Files changed by this slice: cpython/Objects/rangeobject.c (only final PyRange_Type initializer entry), new scripts/vc6-rangeobject-vectorcall-c89.test.py, and this status entry. Compiler-probe progress only: the VC6 source-list probe still fails; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly probe before editing; if unchanged, isolate only Objects/setobject.c(244)'s first C89 declaration blocker in its own TDD slice. Do not claim port completion.

Latest run (`range_as_number` positional initializer; frontier advances)

Date: 2026-10-10 03:05 UTC

Read PORT_STATUS.md, README.md, and the relevant CPython Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded rangeobject frontier was freshly confirmed with forced-fresh MSVC600/Wine compilation before editing. _blake2/blake2s_impl.c compiled; the first stable diagnostic was C2059 at Objects/rangeobject.c(686) on .nb_bool; a separate C2059 remained later at line 756 on .tp_vectorcall. One focused Codex CLI coding lane (codex-cli 0.153.4, ephemeral, workspace-write) followed strict TDD. It added scripts/vc6-rangeobject-number-c89.test.py, which derives all 36 PyNumberMethods fields from the actual header and checks each slot semantically. The test failed before production edits as expected with ISO C90 forbids specifying subobject to initialize. Only range_as_number was converted to positional initialization, mapping (inquiry)range_bool to nb_bool and zeroing all other fields. The separate .tp_vectorcall initializer was not touched. A snapshot verification confirmed all pre-existing dirty/untracked bytes, both indexes, statuses, and HEADs were preserved except for this intended source edit and added test.

Exact verification:

Pre-change command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010Tcurrent/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010Tcurrent/probe-before.log 2>&1 — actual probe exit 2; total=104 compiled=103 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostic C2059 at rangeobject.c(686); separate C2059 at (756). Capture: build/cron-20261010Tcurrent/probe-before.log.
TDD RED: python3 scripts/vc6-rangeobject-number-c89.test.py cpython/Objects/rangeobject.c — exit 1 before source edit, expected C89 rejection of designated initializer at .nb_bool.
Focused GREEN and applicable rangeobject regressions: python3 scripts/vc6-rangeobject-number-c89.test.py cpython/Objects/rangeobject.c and python3 scripts/vc6-rangeobject-index-c89.test.py cpython/Objects/rangeobject.c — both exit 0. The new semantic test checked all 36 fields; range-index test passed 9 cases.
Post-change forced-fresh probe using the same command with runtime build/cron-20261010Tcurrent/runtime-post — actual probe exit 2; total=104 compiled=103 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The line-686 blocker is gone. First blocker advances to C2059 at Objects/rangeobject.c(791) on the distinct designated initializer. Capture: build/cron-20261010Tcurrent/probe-after.log.
git diff --check, git -C cpython diff --check -- Objects/rangeobject.c, and independent rerun of both rangeobject tests — exit 0. Exact CPython tag/commit unchanged. Snapshot confirms outer/nested index and all pre-existing dirty/untracked content preserved.

Files changed by this slice: cpython/Objects/rangeobject.c (only range_as_number), new scripts/vc6-rangeobject-number-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly probe before editing; if still confirmed, isolate only the rangeobject.c(791) designated initializer with its own TDD test. Do not claim port completion.

Previous latest run (range initializer frontier reconfirmed; coding lane unavailable)

Date: 2026-10-10 00:48 UTC

Read PORT_STATUS.md, README.md, and the relevant CPython Win9x/MSVC6 reference before acting. The reference at /home/ubuntu/.hermes/profiles/maxwell/skills/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md was absent; read the available copy at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded rangeobject frontier remains current after a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; the first stable diagnostic is C2059 at Objects/rangeobject.c(686) on the designated .nb_bool initializer. A later separate C2059 remains at line 756 on .tp_vectorcall. One focused coding-subagent attempt was made for only the line-686 initializer and TDD regression, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. No implementation, test, or production source was changed in this run; this is diagnostics-only. The existing local range_index() declaration split was preserved.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261010Tcurrent/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010Tcurrent/probe-before.log 2>&1 — actual probe exit 2; summary total=104 compiled=103 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic: C2059 at rangeobject.c(686); separate later C2059 at (756). Capture: build/cron-20261010Tcurrent/probe-before.log.
Focused coding-agent lane — failed before child startup: anthropic package required; lazy installs disabled. No child edits occurred; no TDD RED/GREEN or regression run is claimed.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested and outer git diff --check commands exited 0.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: retry one focused TDD coding lane for only range_as_number at line 685 when a coding provider can start, leaving the independent line-756 initializer untouched.

Previous latest run (`range_index()` C89 local declaration; frontier advances)

Date: 2026-10-09 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded range frontier was freshly re-probed before editing using MSVC600 under Wine, forced-fresh. _blake2/blake2s_impl.c compiled; the first blocker was C2275/C2065 at Objects/rangeobject.c(601) for the late PyObject *sidx declaration. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a122d4-4e91-7f10-b7b8-713868d6b34c) followed TDD. It added scripts/vc6-rangeobject-index-c89.test.py, observed the expected C89 mixed-declaration RED before production edits, then hoisted only the sidx declaration. The PyNumber_FloorDivide assignment remains at its original evaluation point; no other production function was changed. Snapshot/hash verification confirms the pre-existing 32 outer and 124 CPython dirty/untracked paths and both indexes were unchanged apart from the intended test addition and source edit.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-rerun" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/pre-change-probe-cron-rerun.log 2>&1 — actual probe exit 2; summary total=104 compiled=103 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2065 at rangeobject.c(601) (PyObject / sidx); separate C2059 designated-initializer diagnostics at lines 685 and 755. Capture: build/cron-20261009Tcurrent/pre-change-probe-cron-rerun.log.
TDD RED: python3 scripts/vc6-rangeobject-index-c89.test.py cpython/Objects/rangeobject.c before the source edit — exit 1, expected C90 mixed-declaration diagnostic at the late sidx declaration (recorded by the coding lane).
Focused GREEN: same command after the edit — exit 0, range_index C89 compile and evaluation/cleanup order: PASS (9 cases). The CPython test_range suite was also attempted under host Python 3.14.7 (not this CPython 3.11.16 checkout's built interpreter): 26 tests ran, six subtest failures in test_iterator_pickling_overflowing_index for protocols 0–5 (None != 0); thus this suite is not claimed as passing or as validation of the edited C source.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post-range-index" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/post-range-index.log 2>&1 — actual probe exit 2; summary total=104 compiled=103 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/rangeobject.c compiled; former line-601 C2275/C2065 diagnostics are gone. First blocker remains in rangeobject.c at line 686, C2059 on a designated initializer; another C2059 remains at line 756. Capture: build/cron-20261009Tcurrent/post-range-index.log.
/tmp/rangeobject-sidx-baseline/verify.py — exit 0; confirms all 32 outer and 124 CPython pre-existing dirty/untracked paths and each index are unchanged, with only the intended new outer test and modified CPython rangeobject.c. git diff --check and git -C cpython diff --check -- Objects/rangeobject.c — exit 0. Exact baseline tag and commit verified unchanged.

Files changed by this slice: cpython/Objects/rangeobject.c (only sidx declaration/assignment split), new scripts/vc6-rangeobject-index-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: force-fresh probe before editing, then handle only the first rangeobject.c designated-initializer blocker at line 686 using its own TDD slice. Do not claim port completion.

Latest run (`PyPickleBuffer_Type` C89 positional initializer; frontier advances)

Date: 2026-10-09 20:35 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the existing dirty outer and detached CPython work; no reset, clean, stash, discard, commit, push, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded picklebuf frontier was freshly rechecked first with forced-fresh MSVC600/Wine compilation: _blake2/blake2s_impl.c and Objects/picklebufobject.c compiled; first stable blocker was C2059 at Objects/picklebufobject.c(211) on .tp_name. One focused Hermes coding-agent attempt failed before startup because the Anthropic package is unavailable and lazy installs are disabled. One Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a1225b-912d-7f93-8cdd-a48be9cae1e2) followed TDD. It added scripts/vc6-picklebuf-type-c89.test.py, observed expected C89 designated-initializer RED before changing production code, then converted only PyPickleBuffer_Type to positional initialization. The regression checks all 48 PyTypeObject fields against the checkout's actual struct layout: all 11 original designated expressions are preserved semantically and the other 37 fields are explicitly zero. Its host C89 compile/runtime harness passed. Snapshot comparison confirmed all other 156 existing dirty/untracked files and indexes remained unchanged; source outside this initializer, including the already-dirty picklebufobject.c, is unchanged by the slice.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-rerun" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-cron-recheck.log 2>&1 — actual probe exit 2; summary total=103 compiled=102 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic C2059 at picklebufobject.c(211). Capture: build/cron-20261009Tcurrent/probe-cron-recheck.log.
TDD RED: python3 scripts/vc6-picklebuf-type-c89.test.py cpython/Objects/picklebufobject.c — exit 1 before production edit; expected ISO C90 forbids specifying subobject to initialize on all 11 designated entries.
GREEN and all applicable picklebuf tests: for test in scripts/vc6-picklebuf-*.test.py; do python3 "$test" cpython/Objects/picklebufobject.c; result=$?; echo "$test exit=$result"; if test "$result" -ne 0; then exit "$result"; fi; done — exit 0. The new type test passed all 48 semantic field mappings; existing buffer-field and picklebuf_raw() validation/allocation-order tests passed (5 cases). Independently reran the new type test — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post-picklebuf-type" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-post-picklebuf-type.log 2>&1 — actual probe exit 2; summary total=104 compiled=103 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/picklebufobject.c compiled; previous picklebuf designated-initializer blocker is gone. First blocker advances to Objects/rangeobject.c(601) with C2275 PyObject and C2065 sidx; later independent C2059 diagnostics are at lines 685 and 755. Capture: build/cron-20261009Tcurrent/probe-post-picklebuf-type.log.
git -C cpython diff --check, git diff --check, and focused type test — exit 0. Nested CPython exact tag and commit verified unchanged. Codex's diff --no-index --check /dev/null new-file and whole-file comparison returned exit 1 because those commands signal differing content; no whitespace diagnostics were emitted. These are not counted as passing checks.

Files changed by this slice: cpython/Objects/picklebufobject.c (only PyPickleBuffer_Type), new scripts/vc6-picklebuf-type-c89.test.py, and this status entry. Compiler-frontier progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: force-fresh probe before editing and address only the current first blocker in Objects/rangeobject.c at line 601. Do not claim port completion.

Latest run (`picklebuf_raw()` C89 declarations; frontier advances)

Date: 2026-10-09 16:04 UTC

Read PORT_STATUS.md, README.md, and the relevant legacy-toolchain reference before acting. The reference is at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md; the project-local copy is absent. Preserved all pre-existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded picklebuf_raw() blocker was confirmed with a forced-fresh MSVC600/Wine probe before editing. _blake2/blake2s_impl.c compiled. VC6 reported C2059 at the independent designated initializer in Objects/picklebufobject.c(142), then C2275/C2065 at (162) for PyObject *m and (166) for PyMemoryViewObject *mv, followed by cascades. One focused Hermes coding-subagent attempt failed before startup because the Anthropic package is unavailable and lazy installs are disabled. One Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a12169-8e26-79d1-971b-be4dac44ca93) then followed strict TDD. It added a focused C89 compile/runtime regression covering released/non-contiguous validation, allocation failure, memoryview mutation, and event order; it observed the expected mixed-declaration RED before moving only m and mv to the function's declaration block. Their assignments remain at the original points after the guards and successful allocation. The C2059 designated initializers and all other files/blockers were left untouched. Independent diff review confirms only the two declaration forms changed in picklebuf_raw().

Exact verification:

Before-change command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/reprobe-before.log 2>&1 — actual probe exit 2; summary total=103 compiled=102 cached=0 skipped=0. First stable diagnostics: C2059 at line 142; C2275/C2065 at lines 162 and 166; independent C2059 at line 208. _blake2/blake2s_impl.c compiled. Log: build/cron-20261009Tcurrent/reprobe-before.log.
TDD RED: python3 scripts/vc6-picklebuf-raw-c89.test.py cpython/Objects/picklebufobject.c before the production edit — expected C89 mixed-declaration failure, as recorded by the Codex lane. GREEN and focused C89 compile/runtime cases: same command after edit — exit 0, picklebuf_raw C89 compile and validation/allocation order: PASS (5 cases).
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-post-picklebuf-raw.log 2>&1 — actual probe exit 2; summary total=103 compiled=102 cached=0 skipped=0. The former line-162/166 declaration diagnostics are gone; first blocker is now the designated initializer C2059 at line 142 (also line 211), untouched. _blake2/blake2s_impl.c compiled. No full build/link was attempted.
git -C cpython diff --check -- Objects/picklebufobject.c and git diff --check -- scripts/vc6-picklebuf-raw-c89.test.py — exit 0. Exact baseline tag/commit verified unchanged.

Files changed by this slice: cpython/Objects/picklebufobject.c (only declarations within picklebuf_raw()), new scripts/vc6-picklebuf-raw-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: force-fresh probe before editing, then isolate only the first designated initializer blocker at picklebuf_as_buffer line 142 as its own test-first slice. Do not claim port completion.

Previous run (`mutablemapping_update()` len C89 declaration; frontier advances)

Date: 2026-10-09 13:58 UTC

Read this status and README.md before acting. The invoked skill reference references/python-3-win9x-msvc6.md was not found in the accessible project/skill files; prior status likewise records it unavailable. Preserved all pre-existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython exact baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c success and mutablemapping_update() late Py_ssize_t len blocker were reconfirmed with a forced-fresh MSVC600/Wine source-list probe before editing. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a120ef-d52c-7423-aebc-d991acb9f188) followed strict TDD. It snapshotted and hashed all 151 pre-existing dirty/untracked paths across the outer and nested repositories. It added a C89 compile/runtime regression covering 10 argument/keyword/error/order cases, observed expected RED at the mixed declaration, then moved only Py_ssize_t len to the function declaration block and retained the assignment immediately after the existing assertion. Independent snapshot comparison confirmed all other 150 baseline paths and both indexes unchanged; PORT_STATUS.md remained untouched by the lane. No other defect family was edited.

Exact verification:

Before-change command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-run" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-current.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2143 at Objects/odictobject.c(2299) and C2065 len at (2300). Log: build/cron-20261009Tcurrent/probe-current.log.
TDD RED: python3 scripts/vc6-odict-update-len-c89.test.py cpython/Objects/odictobject.c — exit 1, expected C90 mixed-declaration diagnostic at the late Py_ssize_t len declaration. GREEN: same command after edit — exit 0, 10 C89 compile/runtime cases passed.
Applicable regression loop: for test in scripts/vc6-odict-*.test.py; do python3 "$test" cpython/Objects/odictobject.c; result=$?; echo "$test exit=$result"; if test "$result" -ne 0; then exit "$result"; fi; done — exit 0; all six odict tests passed individually.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-post-len.log 2>&1 — actual probe exit 2; summary total=103 compiled=102 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/odictobject.c compiled. Former len diagnostics are gone. First blocker advances to Objects/picklebufobject.c: C2059 at lines 142 and 208 on designated initializers; C2275/C2065 at line 162 (PyObject *m) and line 166 (PyMemoryViewObject *mv), with later pointer errors cascading. Log: build/cron-20261009Tcurrent/probe-post-len.log.
git diff --check -- PORT_STATUS.md scripts/vc6-odict-update-len-c89.test.py and git -C cpython diff --check -- Objects/odictobject.c — exit 0. Exact baseline tag and commit checked unchanged.

Files changed by this slice: cpython/Objects/odictobject.c (one declaration/assignment split), new scripts/vc6-odict-update-len-c89.test.py, and PORT_STATUS.md. The applicable focused tests and compiler probe validate compiler-frontier progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: freshly probe before editing, then isolate the first current picklebufobject.c defect family only. Do not claim port completion.

Previous run (mutablemapping_update `len` frontier reconfirmed; coding lane unavailable)

Date: 2026-10-09 09:40 UTC

Read PORT_STATUS.md, README.md, and attempted the required CPython Win9x/MSVC6 reference before acting. The reference file was not present at /home/ubuntu/.hermes/skills/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md; no source changes were made in this diagnostics-only run. Preserved the pre-existing dirty outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded mutablemapping_update() frontier remains current after a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; the first stable blocker remains the late Py_ssize_t len declaration in Objects/odictobject.c, followed by the undeclared len use. One focused coding-agent delegation was attempted for this exact slice, but failed before child startup because the runtime lacks the anthropic package and lazy installs are disabled. No test or production source was changed; no RED/GREEN cycle or regression suite was claimed.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-rerun" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/cron-reprobe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at odictobject.c(2299) and C2065 len at (2300). Capture: build/cron-20261009Tcurrent/cron-reprobe.log.
One focused coding-subagent delegation for the len declaration family failed before child startup: Anthropic package missing; lazy installs disabled. No child modifications occurred.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/odictobject.c exited 0.
No source/test regressions were run because no source or test changed. The MSVC environment emitted no standalone compiler banner. No link, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: retry the single focused TDD len declaration slice when a coding agent can start; keep assignment at its existing evaluation point. Do not claim port completion.

Latest run (confirmed `mutablemapping_update()` frontier; coding lane unavailable)

Date: 2026-10-09 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded mutablemapping_update() first blocker was freshly confirmed by a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; first blocker remains C2143 at Objects/odictobject.c(2299) on the late Py_ssize_t len declaration, followed by C2065 len at 2300. A single focused coding-agent delegation was attempted as required, but failed before child startup because the Hermes runtime lacks the anthropic package and lazy installs are disabled. No source or test changes were made in this run; this is diagnostics-only.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261009-rerun/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009-rerun/pre-change-probe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at odictobject.c(2299) and C2065 len at (2300). Capture: build/cron-20261009-rerun/pre-change-probe.log.
One focused coding-subagent delegation for exactly the mutablemapping_update() declaration family failed before child startup: Anthropic package missing; lazy installs disabled. No child modifications occurred.
No source or regression test was changed/run in this diagnostics-only run. The directly applicable odict test set was already recorded as passing in the immediately preceding run.
Probe output showed the MSVC environment setup text but did not include a standalone compiler version banner. No compiler-link, Wine interpreter, or real Windows 98 SE result was produced.
CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: retry one isolated TDD coding lane for only the confirmed Py_ssize_t len declaration in mutablemapping_update() when a coding-agent provider is available; retain the assignment at its existing post-assertion point. Do not claim port completion.

Latest run (`mutablemapping_update_arg` iterator/key declarations; frontier advances)

Date: 2026-10-09 03:24 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved all existing outer and detached CPython work. No reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact release tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded mutablemapping_update_arg() frontier was freshly confirmed using the forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; summary total=102 compiled=101 cached=0 skipped=0. First blocker: C2275/C2065 at Objects/odictobject.c(2252) for late PyObject *iterator, followed by the same declaration-family issue at (2257) for PyObject *key. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write, ephemeral; session 01a11eab-b100-7c81-a014-403f0be55bc3) followed strict TDD. It added a C89 compile/runtime regression for the exact keys branch, observed expected RED on only the targeted late declarations, then moved only iterator and key declarations to the start of the branch. iterator = PyObject_GetIter(keys) remains after the existing NULL check and at its original evaluation point; key initialization remains in the loop. No later len declaration was touched. The delegated lane's preservation hash check verified all 149 other pre-existing dirty files were unchanged.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/pre-change-probe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: C2275/C2065 at odictobject.c(2252) and C2275/C2065 at (2257). Capture: build/cron-20261009Tcurrent/pre-change-probe.log.
TDD RED: python3 scripts/vc6-odict-update-arg-iterator-c89.test.py cpython/Objects/odictobject.c — exit 1, expected C90 mixed-declaration diagnostics exactly at the iterator and key declarations. GREEN: same command after edit — exit 0, eight runtime evaluation/cleanup cases passed.
Applicable odict regressions, each exit 0: vc6-odict-list-c89.test.py (24 cases), vc6-odict-number-c89.test.py (36 field mappings), vc6-odict-or-c89.test.py (8 cases), and vc6-odict-update-arg-func-c89.test.py (6 cases). Aggregate loop exit 0. git diff --check for the new test and nested git diff --check -- Objects/odictobject.c — exit 0.
Post-change forced-fresh probe with XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post" and otherwise the same command — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The former diagnostics at 2252 and 2257 are gone; first blocker advances to odictobject.c(2299) C2143 / (2300) C2065 on len. Capture: build/cron-20261009Tcurrent/post-change-probe.log.
Exact CPython tag and commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed by this slice: cpython/Objects/odictobject.c (only iterator/key declarations in mutablemapping_update_arg()), new scripts/vc6-odict-update-arg-iterator-c89.test.py, and this status entry. Compiler-probe progress only. Next frontier: force-fresh probe before editing, then address only the actual first blocker (currently the late Py_ssize_t len in mutablemapping_update(), line 2299). Do not claim port completion.

Previous run (`mutablemapping_update_arg` declaration family; frontier advances)

Date: 2026-10-09 01:13 UTC

Read the existing status, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded mutablemapping_update_arg() frontier was freshly confirmed before editing with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; summary total=102 compiled=101 cached=0 skipped=0. First blocker: C2275/C2065 at Objects/odictobject.c(2242) on the late PyObject *func declaration. Native Hermes coding delegation was unavailable because the Anthropic package is not installed and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write, ephemeral) then followed TDD: added a prefix-only C89 compile/runtime regression, observed expected RED before changing production, and moved only PyObject *func to the function's initial declaration group. The change leaves lookup after the exact-dict path, preserving execution/cleanup/error order. Distinct later declarations at lines 2252/2257 and the mutablemapping_update() blocker at 2298-2299 were not touched. The lane reports all 148 pre-existing dirty/untracked files remained byte-identical; independent diff inspection confirms the only new source hunk in already-dirty odictobject.c is this declaration relocation.

Exact verification:

Pre-change command: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/pre-change-probe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors: C2275/C2065 at odictobject.c(2242) (PyObject, func), followed by separate errors at 2252, 2257, 2298-2299. Capture: build/cron-20261009Tcurrent/pre-change-probe.log.
TDD RED: python3 scripts/vc6-odict-update-arg-func-c89.test.py cpython/Objects/odictobject.c — exit 1, expected ISO C90 forbids mixed declarations and code at the late declaration. GREEN: same command after source change — exit 0, mutablemapping_update_arg prefix C89 compile and dict/lookup ordering: PASS (6 cases).
Applicable odict regressions, all exit 0: the new vc6-odict-update-arg-func-c89.test.py (6 cases), vc6-odict-list-c89.test.py (24 cases), vc6-odict-number-c89.test.py (36 mappings), and vc6-odict-or-c89.test.py (8 cases). Independently rerun together after the coding lane; aggregate exit 0.
Post-change forced-fresh probe with XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post" and otherwise the same command — actual probe exit 2; summary still total=102 compiled=101 cached=0 skipped=0. Former line-2242 errors are gone. First blocker advances to odictobject.c(2252) C2275/C2065 (PyObject *iterator); separate errors remain at 2257 (key) and 2298-2299 (len). Capture: build/cron-20261009Tcurrent/post-change-probe.log.
git diff --check -- scripts/vc6-odict-update-arg-func-c89.test.py and git -C cpython diff --check -- Objects/odictobject.c — exit 0. Exact baseline tag/commit unchanged.

Files changed by this slice: cpython/Objects/odictobject.c (only the func declaration relocation within mutablemapping_update_arg()), new scripts/vc6-odict-update-arg-func-c89.test.py, and this status entry. Probe logs are under ignored build/cron-20261009Tcurrent/. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: forced-fresh probe first, then address only the first actual blocker, currently PyObject *iterator at odictobject.c(2252). Do not claim port completion.

Previous run (`odictiter_reduce` C89 declaration; compiler frontier advances)

Date: 2026-10-08 23:00 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved the existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c state and odictiter_reduce() first blocker were freshly checked with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; the first blocker was C2275/C2065 at Objects/odictobject.c(1839) on PyObject *list. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11db9-b3c7-7501-90a5-628fa8390bd5) followed strict TDD. It added scripts/vc6-odict-list-c89.test.py, observed the expected C90 mixed-declaration RED before production edits, then hoisted only the list declaration into odictiter_reduce()'s declaration group. Its PySequence_List((PyObject*)&tmp) initializer remains at its original point after both increfs, preserving evaluation timing, refcounts, cleanup, and error flow. No later function or blocker was changed. Preservation snapshot comparison confirmed every pre-existing dirty/untracked file remained byte-identical except the intended production edit; PORT_STATUS.md was then updated for this run.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261008Tcurrent/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261008Tcurrent/reprobe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors: C2275/C2065 at odictobject.c(1839) for PyObject *list; subsequent independent diagnostics included lines 2241, 2251, 2256, and 2297-2298. Wine startup initially failed before this capture because the server lock path under /run/user/1000/wine was read-only; wine cmd /c ver using the same project-local runtime then succeeded, and the fresh probe succeeded. Capture: build/cron-20261008Tcurrent/reprobe.log.
TDD RED: python3 scripts/vc6-odict-list-c89.test.py cpython/Objects/odictobject.c before production edit — exit 1, expected ISO C90 forbids mixed declarations and code at the initialized PyObject *list declaration. GREEN: same command after edit — exit 0, odictiter_reduce C89 compile and copy/incref/list/cleanup/ownership/failure order: PASS (24 cases).
Applicable odict regressions: for test in scripts/vc6-odict-list-c89.test.py scripts/vc6-odict-or-c89.test.py scripts/vc6-odict-number-c89.test.py; do python3 "$test" cpython/Objects/odictobject.c || exit "$?"; done — exit 0. All three passed: list/order/ownership (24 cases), odict_or operation ordering (8 cases), and all 36 numeric-method mappings.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261008Tcurrent/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261008Tcurrent/reprobe-retry.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/odictobject.c compiled; former diagnostics at line 1839 are gone. First stable blocker advances to odictobject.c(2242): C2275 on PyObject and C2065 on func; further distinct diagnostics remain at 2252, 2257, and 2298-2299. Capture: build/cron-20261008Tcurrent/reprobe-retry.log.
git diff --check -- scripts/vc6-odict-list-c89.test.py and git -C cpython diff --check -- Objects/odictobject.c — exit 0. git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD and git -C cpython rev-parse 'v3.11.16^{commit}' both → 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed by this run: cpython/Objects/odictobject.c (only the odictiter_reduce() declaration split), new scripts/vc6-odict-list-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly probe before editing, then isolate only the first current blocker at odictobject.c(2242) (PyObject *func). Do not claim port completion.

Previous run (`odict_as_number` positional initializer; frontier advances)

Date: 2026-10-08 20:48 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded compiler frontier was freshly checked with a forced-fresh MSVC600/Wine source-list probe before edits. _blake2/blake2s_impl.c compiled. The first blocker was the designated initializer in Objects/odictobject.c's odict_as_number at line 900 (C2059). One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11d40-75d0-7623-8a3b-dc382dcca4fe) followed TDD. It added scripts/vc6-odict-number-c89.test.py, which compiled the exact table as C89 and checks all 36 PyNumberMethods fields by semantic name. The test failed before the source edit as expected, then passed after replacing only odict_as_number with a positional initializer: odict_or remains in nb_or, odict_inplace_or remains in nb_inplace_or, and all 34 other fields are zero. No later odictobject.c functions were edited. All pre-existing changes remain preserved.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-20261008T203722Z" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The first stable blocker was C2059 at odictobject.c(900) on the .nb_or designated initializer. Capture: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791491842-1537598-7ce0.log.
TDD RED: the new python3 scripts/vc6-odict-number-c89.test.py cpython/Objects/odictobject.c failed before production change (expected C89 compile failure for designated initialization). GREEN: same test after the edit — exit 0, odict_as_number C89 compile and all 36 semantic field mappings: PASS. python3 scripts/vc6-odict-or-c89.test.py cpython/Objects/odictobject.c — exit 0, operation-order runtime regression passed (8 cases).
Applicable frontier regression harness: XDG_RUNTIME_DIR="$PWD/build/odict-number-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/odict-number-slice/frontier-test.log 2>&1 — exit 1; 260 checks passed, with two known failures: console type detection/control-cleanup order (line 215) and numeric dispatch (ValueError: substring not found, line 239). No harness-wide pass claimed. bash scripts/vc6-probe.test.sh also exited 1 because its compiler-diagnostic-output check failed; other checks in that script passed. No broad pass claimed.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/odict-number-slice/runtime-retry" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/odictobject.c compiled; the prior line-900 C2059 is gone. First remaining stable errors are C2275/C2065 at odictobject.c(1839) for PyObject *list, followed by independent blockers at 2241, 2251, 2256, and 2297-2298. These are untouched. Capture: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791492247-1537598-3a80.log.
Focused verification rerun after the coding lane: both odict regression tests exited 0; scoped outer/nested git diff --check exited 0. The exact CPython tag/commit remain unchanged. The changed production initializer is the only new modification within the already-dirty cpython/Objects/odictobject.c; odict_or() and the remainder of odictobject.c retain their pre-run bytes.

Files changed by this run: cpython/Objects/odictobject.c (positional odict_as_number initializer), new scripts/vc6-odict-number-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly probe before editing; if confirmed, isolate only the current first blocker in odictobject.c at line 1839 (PyObject *list). Do not claim port completion.

Latest run (`odict_or` first C89 declaration family; frontier advances)

Date: 2026-10-08 18:32 UTC

Read this status, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing dirty outer and detached CPython state. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyObject_DebugMallocStats() frontier was stale. A forced-fresh VC6/Wine source-list probe confirmed _blake2/blake2s_impl.c compiles and the first blocker is Objects/odictobject.c, at the late PyObject *new declaration inside odict_or() (C2275/C2065 at line 875). The first focused Hermes coding-agent dispatch did not start because the Anthropic package is unavailable and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11cc7-e355-7182-ba94-9a3530930344) then performed strict TDD. It added an exact-function C89 compile/runtime regression, observed the expected RED before production edit, and moved only the declaration of new into the function's declaration group; its assignment remains at the original point after the PyDict_Check() rejection. The regression exercises operand selection, rejection, constructor failure, update failure/cleanup, and success in eight cases. The distinct designated-initializer and later function blockers remain untouched. The coding lane verified all 145 pre-existing dirty/untracked files byte-for-byte unchanged.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-20261008T182533Z" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2065 at odictobject.c(875) for PyObject *new; separate diagnostics at 899, 1804, 2206-2221, and 2262-2263 remained. Capture: build/cron-current/cron-20261008T182533Z-current-reprobe.log.
TDD RED: python3 scripts/vc6-odict-or-c89.test.py cpython/Objects/odictobject.c — exit 1 before source edit; expected ISO C90 mixed-declaration diagnostic (-Wdeclaration-after-statement). GREEN: same command after edit — exit 0, odict_or C89 compile and operand/rejection/construction/update/cleanup order: PASS (8 cases).
Applicable broader regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/odict-or-frontier-tests.log 2>&1 — exit 1. It reports two existing unrelated failures: console type detection/control-cleanup order (line 215) and numeric dispatch (ValueError: substring not found, line 239). All other logged checks passed; no full-harness pass claimed.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-20261008T183212Z" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c and the edited odictobject.c compiled past the odict_or() declaration. The former line-875 diagnostics are gone. First remaining diagnostic is C2059 at odictobject.c(900) for the designated initializer; subsequent independent blockers remain at 1805, 2207, 2217, 2222, and 2263-2264. Capture: build/cron-current/cron-20261008T183212Z-post-odict.log.
Independent focused test rerun and git -C cpython diff --check -- Objects/odictobject.c / git diff --check -- scripts/vc6-odict-or-c89.test.py — exit 0. Baseline exact tag/commit verified unchanged.

Files changed by this run: cpython/Objects/odictobject.c (only the odict_or() declaration/assignment split), new scripts/vc6-odict-or-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: re-probe forced-fresh before edits; address only the first current odictobject.c diagnostic, the separate designated initializer at line 900. Do not claim port completion.

Latest run (`_PyObject_DebugMallocStats` declaration family; frontier advances)

Date: 2026-10-08 16:24 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyObject_DebugMallocStats() frontier was confirmed by a forced-fresh probe before editing. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11c4e-a3a7-7b73-a20f-1f4c20e4a4f4) used strict TDD for this function only. The new focused test failed before production changes with the expected declaration-order assertion. Then only local declarations were hoisted before the _PyMem_PymallocEnabled() early-return guard. All scalar initializers were converted to assignments after the guard at the original execution point and in original order. The guard still returns before those initializations, array zeroing is unchanged, and the rest of the function is asserted byte-semantically through normalized token order. No other function was edited by this slice.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-$(date -u +%Y%m%dT%H%M%SZ)" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; _blake2/blake2s_impl.c compiled; summary total=101 compiled=100 cached=0 skipped=0. First stable diagnostics were C2143 at Objects/obmalloc.c(3035-3036), then C2275/C2146/C2065 at (3038-3042). Capture: build/cron-current/cron-20261008-current-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-debugmallocstats-c89.test.py cpython/Objects/obmalloc.c — exit 1 before source edit with the expected assertion that declarations must precede the guard.
TDD GREEN and complete focused obmalloc regressions: python3 scripts/vc6-obmalloc-debugmallocstats-c89.test.py cpython/Objects/obmalloc.c && for test in scripts/vc6-obmalloc-*.test.py; do python3 "$test" cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h || exit "$?"; done — exit 0. All 16 discovered vc6-obmalloc-*.test.py scripts exited 0.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-$(date -u +%Y%m%dT%H%M%SZ)-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled, and the former obmalloc.c(3035-3050) diagnostics are gone. First stable blocker advanced to Objects/odictobject.c: C2275/C2065 at lines 875, 1804, 2206-2221 and C2059/C2143/C2065 around 899 and 2262-2263. Capture: build/cron-current/cron-20261008-debugmallocstats-post.log.
git diff --check -- PORT_STATUS.md scripts/vc6-obmalloc-debugmallocstats-c89.test.py and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. CPython exact tag and commit unchanged.

Files changed by this run: cpython/Objects/obmalloc.c (only _PyObject_DebugMallocStats() within the existing dirty source file), new scripts/vc6-obmalloc-debugmallocstats-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. MSVC6 banner was not separately recorded in this run. Next frontier: fresh forced-fresh probe before edits, then isolate only the first current Objects/odictobject.c blocker using its own TDD slice. Do not claim port completion.

Latest run (fresh `_PyObject_DebugMallocStats` frontier; coding delegation unavailable)

Date: 2026-10-08 14:12 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyObject_DebugMallocStats() blocker was freshly reprobed with forced-fresh MSVC600/Wine compilation. _blake2/blake2s_impl.c compiled; the first stable blocker remains in Objects/obmalloc.c at _PyObject_DebugMallocStats(). VC6 reports C2143 at lines 3035-3036, where declarations follow the executable _PyMem_PymallocEnabled() guard/return, then C2275/C2146/C2065 for the size_t declarations at lines 3038-3042 and cascades. One focused coding-subagent delegation was attempted for only this function, with strict TDD and preservation constraints, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. No source or test changes were made. This run is diagnostics-only; declaration/evaluation handling still requires a test-first implementation.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-$(date -u +%Y%m%dT%H%M%SZ)" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; summary total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: C2143 at obmalloc.c(3035-3036), then C2275/C2146/C2065 at (3038-3042). Full captured tool output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791468469-1438139-8770.log.
Focused coding delegation — failed before child startup: anthropic package required; lazy installs disabled. No child edits.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed this run: PORT_STATUS.md only. All pre-existing source/test modifications remain untouched. Compiler-probe progress only; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: retry a focused TDD coding lane for _PyObject_DebugMallocStats() when a coding agent can start; keep declarations needed before the early guard distinct from later locals where moving initialization could change timing. Do not claim port completion.

Previous latest run (fresh `_PyObject_DebugMallocStats` frontier; coding lane unavailable)

Date: 2026-10-08 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded post-_PyMem_DebugCheckAddress() compiler state was freshly reprobed. The forced-fresh source-list probe compiled _blake2/blake2s_impl.c; the actual first stable blocker has advanced to Objects/obmalloc.c in _PyObject_DebugMallocStats(). VC6 first reports C2143 at lines 3035-3036, where declarations follow the executable _PyMem_PymallocEnabled() guard/return. It then reports C2275/C2146/C2065 for the subsequent size_t declarations at lines 3038-3042, followed by cascades through later locals. No source or test change was made: the required single focused coding-subagent attempt failed before startup because the Anthropic package is unavailable and lazy installs are disabled. This is diagnostic-only; the function’s exact declaration/evaluation requirements still need a TDD test before implementation.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-20261008-rerun" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-20261008-current-frontier.log 2>&1 — actual probe exit 2; summary total=101 compiled=100 cached=0 skipped=0. First stable diagnostics: C2143 at obmalloc.c(3035-3036), then C2275/C2146/C2065 at (3038-3042); _blake2/blake2s_impl.c compiled. Full capture: build/cron-current/cron-20261008-current-frontier.log.
Focused coding delegation for only the confirmed _PyObject_DebugMallocStats() declaration family — failed before child startup: missing anthropic package; lazy installs disabled. No child edits were applied.
Nested baseline checks: exact tag v3.11.16 and commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/obmalloc.c — exit 0.

Files changed this run: PORT_STATUS.md only. All pre-existing source/test modifications remain untouched. This is compiler-probe progress only; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: a focused TDD lane for the declarations in _PyObject_DebugMallocStats() when a coding agent can start; preserve initialization/evaluation relative to the early return and do not touch later blockers.

Previous latest run (`_PyMem_DebugCheckAddress` C89 declarations hoisted; compiler confirmation blocked)

Date: 2026-10-08 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyMem_DebugRawRealloc() frontier was freshly confirmed before editing: _blake2/blake2s_impl.c compiled, with first stable diagnostics in Objects/obmalloc.c(2798-2802) inside _PyMem_DebugCheckAddress(). One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11af1-dee3-7112-adbc-cc56f4423bb4) followed TDD and changed only that function plus a new focused test. It moved the q declaration before assert and kept q = (const uint8_t *)p after the assertion, preserving the pointer-cast evaluation point and all validation/error order. Test observed expected RED before production edit, then GREEN. All 15 scripts/vc6-obmalloc-*.test.py scripts passed with the required pycore_pymem.h argument for tracemalloc. Codex's forced-fresh probe attempts could not start the compiler: Wine repeatedly attempted to create /run/user/1000/wine/server-801-136fb0/lock and failed with Read-only file system; both attempts ended at Modules/getpath.c, total=1 compiled=0 cached=0. Thus the compiler frontier after this source edit is unverified and no compiler advancement is claimed.

Exact verification:

Before-edit fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-20261008-confirm" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-20261008-confirm.log 2>&1 — wrapper exit 0 while recording actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. First stable diagnostics: C2143 at obmalloc.c(2798), C2275/C2146/C2065 on size_t nbytes at (2799), followed by late declaration diagnostics at (2800-2802). _blake2/blake2s_impl.c compiled.
TDD RED: python3 scripts/vc6-obmalloc-debugcheckaddress-c89.test.py cpython/Objects/obmalloc.c — exit 1 with expected entry-declaration assertion before production edit. GREEN: same command after edit — exit 0.
Applicable regressions: for test in scripts/vc6-obmalloc-*.test.py; do python3 "$test" cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h || exit "$?"; done — all 15 exited 0.
Post-edit forced-fresh probe attempted twice, exact command prefix XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-codex-check" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh; actual exit 1 both times before compilation, despite project-local runtime directory creation. Logs: build/cron-current/vc6-debugcheckaddress-frontier.log and build/cron-current/vc6-debugcheckaddress-frontier-retry.log. Both show sock_init: ERROR in sock_check_pollhup(), Wine lock creation failure on read-only /run/user/1000, and total=1 compiled=0 cached=0 skipped=0. This is a Wine startup failure, not a compiler diagnostic.
Independent checks: focused regression rerun and scoped git diff --check for cpython/Objects/obmalloc.c and the new test — exit 0. CPython tag/commit unchanged.

Files changed by this run: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-debugcheckaddress-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: restore/diagnose a writable Wine server runtime, then force a fresh probe before selecting any further edit. Do not infer the next frontier from stale diagnostics.

Previous latest run (fresh obmalloc frontier confirmed; coding agent unavailable)

Date: 2026-10-08 07:51 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyMem_DebugRawRealloc() blocker at obmalloc.c(2650-2658) was freshly re-probed with forced-fresh VC6/Wine compilation. _blake2/blake2s_impl.c compiled; the first stable blocker has advanced to Objects/obmalloc.c(2798-2802), late declarations in a subsequent function. No implementation was attempted because the required focused coding-agent delegation failed before startup: Hermes reported the Anthropic package is unavailable and lazy installs are disabled. Per the delegated-lane requirement, no production or test files were changed. The current first blocker is diagnostic evidence only; its specific function and safe isolated TDD test have not yet been established in this run.

Exact verification:

Forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-20261008-realloc-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-20261008-realloc-reprobe.log 2>&1 — actual probe exit 2; summary total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at obmalloc.c(2798); C2275/C2146/C2065 on size_t nbytes at (2799), then C2143 late-declaration diagnostics at (2800-2802). Capture: build/cron-current/cron-20261008-realloc-reprobe.log.
One focused coding-agent delegation was attempted for the confirmed blocker. It failed before startup with The 'anthropic' package is required ... venv: not installed and lazy installs are disabled: ['anthropic']. No child edits were applied.
CPython baseline checks: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git diff --check and git -C cpython diff --check -- Objects/obmalloc.c exited 0 before the status update.

Files changed by this run: PORT_STATUS.md only. The worktree's pre-existing modifications and untracked tests remain preserved. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: retry one focused TDD coding lane for the confirmed obmalloc.c(2798) function, first identify its exact declaration family and a focused regression safely; do not broaden edits or claim port completion.

Latest run (`_PyMem_DebugRawRealloc` C89 locals hoisted; frontier advances)

Date: 2026-10-08 05:45 UTC

The recorded _PyMem_DebugRawFree() follow-on was re-probed forced-fresh before editing; its previous entry-declaration fix remains. The probe confirms _blake2/blake2s_impl.c compiled and the first stable blocker moved to _PyMem_DebugRawRealloc() at obmalloc.c(2650-2658): C2275/C2065 for late debug_alloc_api_t *api, followed by the distinct late uint8_t pointer, size_t, and save declarations. One focused Hermes coding-agent delegation failed before startup because the anthropic package is unavailable and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11a06-0784-7842-8da5-c5896b6ee1a6) followed strict TDD. It added scripts/vc6-obmalloc-debugrawrealloc-c89.test.py, observed the expected RED assertion before production edits, then hoisted only _PyMem_DebugRawRealloc() locals (including guarded block_serialno) to the function entry. api remains initialized after the NULL return; block_serialno retains its read after the overflow guard and tail calculation. Existing operation/control-flow order and both preprocessor paths are asserted by the test. No neighboring function was modified.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-20261008-blake2" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-20261008-blake2-reprobe.log 2>&1 — actual probe exit 2; summary total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics are C2275/C2065 at obmalloc.c(2650) on debug_alloc_api_t / api, then C2275/C2065 at lines 2651-2658 for subsequent locals. Capture: build/cron-current/cron-20261008-blake2-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-debugrawrealloc-c89.test.py cpython/Objects/obmalloc.c — exit 1 before source edit with expected assertion that all locals, including block_serialno, must be entry declarations.
Focused GREEN and applicable obmalloc regressions: scripts/vc6-obmalloc-debugrawrealloc-c89.test.py plus every existing scripts/vc6-obmalloc-*.test.py script — all 14 scripts exit 0. Tracemalloc test was given cpython/Include/internal/pycore_pymem.h. Individual reruns confirmed each result. An attempted combined shell-loop invocation was blocked by the cron security scanner before execution; it is not counted as test failure or pass evidence.
Post-change forced-fresh probe with runtime build/cron-current/runtime-cron-20261008-blake2-post and same flags — actual probe exit 2; summary total=101 compiled=100 cached=0 skipped=0. The previous diagnostics at 2650-2658 are gone; the first remaining stable diagnostics advance to obmalloc.c(2798-2805) in a later function. Capture: build/cron-current/cron-20261008-blake2-post.log.
git diff --check, git -C cpython diff --check, exact tag/commit checks — exit 0; baseline unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed by this run: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-debugrawrealloc-c89.test.py, and this status entry. This is compiler-probe progress only. Next: fresh forced-fresh probe before edits; if confirmed, inspect only the first obmalloc.c(2798) declaration blocker. Preserve all existing work and do not claim port completion.

Previous latest run (`_PyMem_DebugRawFree` C89 locals hoisted; frontier advances)

Date: 2026-10-08 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the existing dirty outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

A fresh forced-fresh VC6/Wine probe showed the logged insert_to_freepool() frontier was stale: _blake2/blake2s_impl.c compiled and the first stable diagnostics were C2275/C2065 at Objects/obmalloc.c(2628-2630), late declarations inside _PyMem_DebugRawFree() following its NULL early return. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a1198d-bd77-7c01-95e3-788ab2904294) performed strict TDD. It added scripts/vc6-obmalloc-debugrawfree-c89.test.py, observed expected RED before production edits, then hoisted only debug_alloc_api_t *api, uint8_t *q, and size_t nbytes to function entry. Assignments to api and q remain after the p == NULL return, retaining the original evaluation point and NULL safety. The test checks declarations, the guard, assignment positions, and full operation order. _PyMem_DebugRawRealloc() and every other compiler blocker remain untouched.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-20261008" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-20261008-reprobe.log 2>&1 — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors: C2275 debug_alloc_api_t and C2065 api at line 2628, then C2275 uint8_t/C2065 q at 2629 and C2143 before size_t nbytes at 2630. Capture: build/cron-current/cron-20261008-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-debugrawfree-c89.test.py cpython/Objects/obmalloc.c — exit 1 before source edit, expected entry-declaration assertion.
GREEN and applicable regressions: python3 scripts/vc6-obmalloc-debugrawfree-c89.test.py cpython/Objects/obmalloc.c && for test in scripts/vc6-obmalloc-*.test.py; do python3 "$test" cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h || exit "$?"; done — exit 0; focused test and all 13 obmalloc scripts passed.
Post-change forced-fresh probe with runtime build/cron-current/runtime-cron-20261008-post, same flags — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former diagnostics at lines 2628-2630 are gone; first stable blocker advances to _PyMem_DebugRawRealloc() at obmalloc.c(2650-2655), C2275/C2065 for late api, head, data, r, tail, and total declarations. Capture: build/cron-current/cron-20261008-post.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. git diff --check and git -C cpython diff --check -- Objects/obmalloc.c exited 0. Baseline-hash check confirmed the 4,767 other tracked/untracked files and indexes were unchanged by the coding lane; CPython source bytes outside _PyMem_DebugRawFree() were unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-debugrawfree-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: fresh forced-fresh probe before edits; if confirmed, address only the first _PyMem_DebugRawRealloc() declaration family, with its own TDD slice. Do not claim port completion.

Previous latest run (`insert_to_freepool` C89 locals hoisted; frontier advances)

Date: 2026-10-07 UTC

Re-probed the recorded insert_to_freepool() frontier with forced-fresh VC6/Wine compilation before editing. _blake2/blake2s_impl.c compiled; the first stable diagnostic was C2143 at obmalloc.c(2109) for a declaration after executable statements, followed by undeclared ao at 2110 and more late declarations (nf, lastnf). Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11829-db82-70c1-87da-d70916c05d82) for strict TDD. Added scripts/vc6-obmalloc-insert-to-freepool-c89.test.py; its RED run failed with the expected assertion requiring entry declarations. Then hoisted only six locals (next, prev, ao, nf, lastnf, p) to function entry; all initialized values remain assigned at their original evaluation points, including p inside its branch. Assertions, branch/control flow, and pointer update order are retained. No neighboring function was edited.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-rerun" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-insert-freepool-reprobe.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: C2143 at obmalloc.c(2109), C2065 ao at (2110), then C2143 at (2112) and (2117). Log: build/cron-current/cron-insert-freepool-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-insert-to-freepool-c89.test.py cpython/Objects/obmalloc.c — exit 1 before production edit; expected assertion insert_to_freepool must declare all six locals without initializers at function entry.
TDD GREEN and all 11 scripts/vc6-obmalloc-*.test.py regressions — exit 0. This included insert-to-freepool, insert-to-usedpool, pool-extend/allocator, calloc, arena-map, allocator-name/default-allocator, RawWcsdup, setup-allocators, and tracemalloc initializer checks. Tracemalloc invocation included cpython/Include/internal/pycore_pymem.h.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-post-insert-freepool" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/post-insert-to-freepool.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0. The former diagnostics at lines 2109-2117 are gone. First remaining diagnostic is C2143 at obmalloc.c(2286) in the next function, pymalloc_free(); its late local declaration is untouched. Log: build/cron-current/post-insert-to-freepool.log.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- scripts/vc6-obmalloc-insert-to-freepool-c89.test.py — exit 0. Nested baseline tag/commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-insert-to-freepool-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: fresh forced-fresh probe before any edits; if confirmed, handle only the first pymalloc_free() declaration family at line 2286 with a separate TDD slice. Do not claim port completion.

Latest run (`insert_to_usedpool` C89 locals hoisted; frontier advances)

Date: 2026-10-07 18:52 UTC

Read this status, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Re-probed the prior _PyObject_Calloc()/insert_to_usedpool() state with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; _PyObject_Calloc() diagnostics were gone and the first stable blocker was insert_to_usedpool()'s late declarations at obmalloc.c(2083-2085). Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a117af-724f-72c0-bb0a-17cc39fe3fb2) for strict TDD. The lane added scripts/vc6-obmalloc-insert-to-usedpool-c89.test.py, observed expected RED before changing production source, then hoisted only uint size, poolp next, and poolp prev to function entry and changed their initializers to assignments after the original assertion. The size calculation, lookup order, and four pointer-link writes are preserved. No neighboring function or later blocker was changed. The coding lane initially passed the wrong header to the broad obmalloc test loop; that invocation failed at tracemalloc header discovery. It corrected the header and the complete applicable obmalloc test set passed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron-calloc-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-calloc-reprobe.log 2>&1 — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2143 at obmalloc.c(2083), followed by C2275/C2146/C2065 for poolp next and poolp prev at (2084-2085). Log: build/cron-current/cron-calloc-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-insert-to-usedpool-c89.test.py cpython/Objects/obmalloc.c — exit 1 before source edit with expected assertion that size, next, and prev must be declared without initializers at function entry.
TDD GREEN: same command after source edit — exit 0; obmalloc insert_to_usedpool entry declarations and original operation order: PASS.
Applicable obmalloc regressions (new insert-to-usedpool test plus all existing vc6-obmalloc-*.test.py tests) — exit 0. The exact corrected chained command is recorded in the Codex output /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791398735-1124658-4e90.log; every script passed, including the tracemalloc test with cpython/Include/internal/pycore_pymem.h. Independently reran the complete applicable set: all 10 scripts/vc6-obmalloc-*.test.py scripts passed (exit 0).
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-post-usedpool" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/post-insert-to-usedpool.log 2>&1 — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. The former insert_to_usedpool() diagnostics at (2083-2085) are gone. First remaining errors are in the next function insert_to_freepool(), beginning C2143 at (2109) and C2065 ao at (2110); left untouched. _blake2/blake2s_impl.c compiled. Log: build/cron-current/post-insert-to-usedpool.log.
Broader frontier regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/insert-to-usedpool-regression-suite.log 2>&1 — exit 1. It reports _thread and tracemalloc checks passed but retains the known ValueError: substring not found failure; no harness-wide pass claimed.
git diff --check -- PORT_STATUS.md scripts/vc6-obmalloc-insert-to-usedpool-c89.test.py and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. CPython exact tag/commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-insert-to-usedpool-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: perform a fresh forced-fresh probe before edits; if confirmed, address only the first insert_to_freepool() declaration family at line 2109 with a separate TDD slice. Do not claim port completion.

Latest run (`pymalloc_alloc` locals hoisted for VC6; frontier advances)

Date: 2026-10-07 14:25 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded allocate_from_new_pool() frontier was re-probed before edits. Forced-fresh VC6/Wine compilation confirmed _blake2/blake2s_impl.c compiled; the prior diagnostics at obmalloc.c(2007-2009) were stale and the actual first diagnostic group was late declarations in the subsequent _PyObject_Calloc() / insert_to_usedpool() code. Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a116bb-a28a-72e1-aa0e-2e149d4d582f). It extended the existing pool-extend regression with a pymalloc_alloc() declaration/order assertion, observed expected RED before source edits, then hoisted only uint size, poolp pool, and block *bp to the function entry. Their initializations and all existing early-return, pool-read, and branch evaluation/control-flow order remain unchanged. No subsequent declarations or distinct functions were edited.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-reprobe-latest.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostic C2143 at obmalloc.c(2007), followed by C2275/C2146/C2065 at lines 2008-2009. The capture also included later cascades.
TDD RED: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c — exit 1; expected assertion pymalloc_alloc must declare size, pool, and bp without initializers at function entry; preceding checks for pymalloc_pool_extend and allocate_from_new_pool passed.
TDD GREEN: same focused command — exit 0; all three pool/allocator declaration-order checks passed. Seven other obmalloc regression scripts (allocator-name, arena-map-is-used, arena-map-mark-used, default allocator, RawWcsdup/allocated-blocks, setup-allocators, tracemalloc-init) each exited 0; tracemalloc used cpython/Include/internal/pycore_pymem.h. Codex lane's per-command output is in /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791382756-1050053-2fd0.log.
Applicable regression harness bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/pymalloc-alloc-frontier.log 2>&1 — exit 1. Known unrelated console type-detection/order assertion failed; numeric-dispatch check raised ValueError: substring not found. Many other checks passed; no broad-suite pass claimed.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-post-pymalloc" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/post-pymalloc-alloc.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0. No diagnostics remain at obmalloc.c(2007-2009). First remaining errors are C2143 at lines 2059 and 2061, followed by C2065 ptr / nbytes at lines 2062-2063 in _PyObject_Calloc(); subsequent C89 diagnostics at line 2080 onward are separate and untouched. This is compiler-probe progress only.
git diff --check and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. Nested baseline verified: exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed by this slice: cpython/Objects/obmalloc.c, extended scripts/vc6-obmalloc-pool-extend-c89.test.py, and this status entry. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: freshly probe before edits; if confirmed, handle only the first current blocker in _PyObject_Calloc() at lines 2059-2063 with its own TDD slice. Do not claim a completed port.

Latest run (`allocate_from_new_pool` pool declaration hoisted; frontier advances)

Date: 2026-10-07 09:56 UTC

Re-probed the recorded poolp next frontier before editing. It had already been fixed locally: the current first blocker was the separate late initialized poolp pool = usable_arenas->freepools declaration in allocate_from_new_pool(). Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a115c5-019c-76d0-ba38-5934bc3d03d6) after native delegation failed because the Anthropic package is unavailable and lazy installs are disabled. The lane extended the existing pool-extend test, ran the focused test RED before production edit, then hoisted only poolp pool to function entry. The assignment remains after the arena-list updates at its original execution point. Existing early returns, allocator list operations, and subsequent pool initialization remain unchanged. pymalloc_pool_extend() and the distinct subsequent blockers were not altered.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-confirm" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — probe exit 2; total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2146/C2065 at obmalloc.c(1889) on poolp pool; following pointer errors are cascades. Log: build/cron-current/cron-reprobe-current.log.
TDD RED: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c — exit 1; expected assertion that allocate_from_new_pool must declare pool without an initializer at function entry. The prior pymalloc_pool_extend assertion passed.
Focused GREEN and eight applicable obmalloc tests: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-arena-map-is-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all checks passed. The RawWcsdup test includes C89 compile/runtime checks.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; existing console type-detection/cleanup-order assertion and numeric-dispatch ValueError: substring not found remain. No harness-wide pass claimed.
Post-change forced-fresh probe (same options, runtime build/cron-current/runtime-post) — probe exit 2; total=101 compiled=100 cached=0 skipped=0; the former poolp pool diagnostics are gone. First remaining diagnostics now occur later in obmalloc.c at lines 1947-1952 (block bp, then poolp next in a separate function); further C89 declaration/type blockers follow. Log: build/cron-current/post-pool-entry.log.
git diff --check and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. Exact baseline tag/commit remain unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, extended scripts/vc6-obmalloc-pool-extend-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: freshly probe before edits and address only the first current blocker in the next function in obmalloc.c (currently block *bp at line 1947), with its own TDD slice. Do not claim port completion.

Previous latest run (`pymalloc_pool_extend` next declaration hoisted; frontier advances)

Date: 2026-10-07 07:34 UTC

The recorded poolp next frontier was confirmed by a fresh forced-fresh MSVC600/Wine probe: total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors were C2275/C2146/C2065 at obmalloc.c(1838) for late poolp next, then pointer-type cascades. Hermes coding-subagent dispatch failed before startup because the anthropic package is unavailable and lazy installs are disabled. Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11547-34ae-7a62-b889-a4ff244cc66a) following strict TDD. It added scripts/vc6-obmalloc-pool-extend-c89.test.py, observed expected RED before modifying production source, then hoisted only poolp next to function entry. Its assignment remains at the original point after the full-pool branch. No behavior or evaluation order changed; the distinct later poolp pool blocker was not touched.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. First errors C2275/C2146/C2065 at obmalloc.c(1838) for poolp next. Log: build/cron-current/cron-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c — exit 1, expected assertion that next must be declared at function entry.
Focused GREEN/regressions: for test in scripts/vc6-obmalloc-*.test.py; do python3 "$test" cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h || exit "$?"; done — exit 0; all eight obmalloc tests passed, including pool-extend declaration/order, allocator and arena-map tests, RawWcsdup C89 compile/runtime checks, setup allocators, and tracemalloc initializer.
First post-change forced-fresh attempt — exit 1 before compiler startup; Wine server failed to create a lock under read-only /run/user/1000. This is not compiler evidence. Retried with XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-retry" and the same command — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c and obmalloc.c compiled through the changed function. Former line-1838 diagnostics are gone. First remaining blocker is the separate late poolp pool at obmalloc.c(1889) (C2275/C2146/C2065); following -> errors cascade. Log: build/cron-current/post-pool-next.log.
git -C cpython describe --tags --exact-match HEAD / rev-parse HEAD verified unchanged baseline. Codex preservation snapshot found only the intended pre-existing modified cpython/Objects/obmalloc.c plus the new test; the production diff is only the declaration move. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-pool-extend-c89.test.py, and this status entry. Compiler-probe progress only. Next: fresh forced probe before any further change; if confirmed, address only the separate poolp pool declaration at line 1889 using TDD. Do not claim port completion.

Previous latest run (`arena_map_is_used` C89 locals hoisted; frontier advances)

Date: 2026-10-07 03:21 UTC

Fresh forced-fresh probe confirmed the prior arena-map frontier had advanced: _blake2/blake2s_impl.c compiled and the first stable errors were the late i3, hi, lo, and tail declarations inside arena_map_is_used() (obmalloc.c(1592,1594-1596)). The Anthropic coding subagent failed before startup because the anthropic package is missing and lazy installs are disabled. Used one focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a1145b-a4bc-7c90-8b48-2d26ea8bc7f9) for strict TDD. It added scripts/vc6-obmalloc-arena-map-is-used-c89.test.py, observed expected RED before production edits, then hoisted only int i3 and int32_t hi, lo, tail above the NULL guard. Their assignments remain after the successful lookup / NULL return at their original evaluation points. The lookup, null behavior, assignment order, and short-circuit predicate remain unchanged. Hash preservation check after the coding lane confirmed the other 134 pre-existing dirty/untracked files (including PORT_STATUS.md at that point) and source outside this function were byte-identical; this status entry was updated afterward for the current run.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostic C2143 at obmalloc.c(1592), followed by C2275/C2146/C2065 on int32_t hi, lo, and tail at lines 1594-1596. Log: build/cron-current/cron-reprobe.log.
TDD RED before source edit: python3 scripts/vc6-obmalloc-arena-map-is-used-c89.test.py cpython/Objects/obmalloc.c — exit 1, expected assertion that the function must declare its locals before the NULL guard.
Focused regressions, independently rerun after edit: new arena-map-is-used test, arena-map-mark-used, allocator-name, default-allocator, RawWcsdup/allocated-blocks, setup-allocators, and tracemalloc-init tests — all exit 0. Exact chained command: python3 scripts/vc6-obmalloc-arena-map-is-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/arena-map-is-used-regression-suite.log 2>&1 — exit 1. It reports the known console type-detection/order failure and numeric-dispatch ValueError: substring not found; no broad suite pass claimed.
Post-change forced-fresh probe, same command as before-change: actual exit 2; total=101 compiled=100 cached=0 skipped=0. The arena_map_is_used() diagnostics are gone. First remaining errors are C2275/C2146/C2065 at obmalloc.c(1838) for a late poolp next, with a separate late poolp pool family at line 1888; left untouched. Log: build/cron-current/post-arena-map-is-used.log.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- PORT_STATUS.md scripts/vc6-obmalloc-arena-map-is-used-c89.test.py, and CPython tag/commit checks — exit 0. No standalone compiler banner was recorded.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-arena-map-is-used-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced-fresh probe before further changes; if the frontier remains, address only the first poolp next C89 declaration family at line 1838 using TDD. Do not claim port completion.

Previous run (`arena_map_mark_used` i3_next declaration hoisted; frontier advances)

Date: 2026-10-07 01:09 UTC

A fresh forced-fresh MSVC600/Wine probe confirmed the recorded i3_next blocker in arena_map_mark_used(). The Hermes coding-subagent API failed before startup because the Anthropic package is missing and lazy installs are disabled. Used one focused Codex CLI codex exec lane instead (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a113e3-575e-7512-89ed-0378245bfdd7). It extended only the existing arena-map test, observed expected RED before production changes, then hoisted only int i3_next to function entry and changed its late initialized declaration to assignment at the original point after the n_lo == NULL return. Its expression, evaluation point, lookup and rollback/control flow remain unchanged. Other local changes were preserved.

Exact verification:

Pre-change: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics C2143 at obmalloc.c(1576) and C2065 i3_next at (1577). Capture: build/cron-current/cron-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c — exit 1, expected assertion that i3_next must be declared at function entry without initializer.
Focused regressions: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all six pass. RawWcsdup includes C89 compile/runtime checks.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/i3-next-regression-suite.log 2>&1 — exit 1. Many checks pass; the known numeric-dispatch check raises ValueError: substring not found. No full-suite pass claimed.
Post-change forced-fresh probe (same command, captured in build/cron-current/post-i3-next.log) — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. The former i3_next diagnostics are gone. First remaining blocker is arena_map_is_used() at line 1592 (C2143 on late int i3); subsequent C89/type diagnostics at 1594-1596 and pool diagnostics at 1833 onward are separate and untouched. The compile probe still does not link an interpreter.
git -C cpython describe --tags --exact-match HEAD and git -C cpython rev-parse HEAD confirm baseline unchanged. Scoped git diff --check commands for the production and test files exited 0.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced probe before further edits; if the frontier remains current, handle only the first arena_map_is_used() C89 declaration family using TDD. Do not claim port completion.

Previous run (fresh VC6 frontier probe; implementation lane unavailable)

Date: 2026-10-06 22:57 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exactly at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The recorded n_lo frontier is no longer the first blocker: a fresh forced-fresh VC6/Wine probe confirms i3_next at Objects/obmalloc.c(1576-1577) is now first.

One focused Hermes coding-subagent attempt was made as required, but failed before startup: the Anthropic package is missing and lazy installs are disabled. No implementation or test change was made; this run is diagnostic-only rather than attempting an unreviewed direct edit.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-reprobe.log 2>&1; rc=$?; ... — probe exit 2 (total=101 compiled=100 cached=0 skipped=0). _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at obmalloc.c(1576) and C2065 i3_next at (1577). Subsequent independent failures include declarations in arena_map_is_used() at 1591-1595 and pool-related errors at 1832 onward; left untouched. Full capture: build/cron-current/cron-reprobe.log.
The terminal wrapper returned exit 0 because it printed and retained the actual probe return code (PROBE_EXIT=2); no compilation success is implied.
Baseline verification: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Existing focused regression suite was not run because this diagnostics-only run changed no source/tests. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed this run: PORT_STATUS.md only. Next: use a focused coding lane when delegation is available to TDD only the i3_next declaration in arena_map_mark_used(), preserving its initialization/evaluation point; keep arena_map_is_used() and later pool blockers separate. Do not claim port completion.

Latest run (`arena_map_mark_used` n_lo declaration hoisted; frontier advances)

Date: 2026-10-06 20:52 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before acting. Preserved the existing dirty outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or patch regeneration. CPython remains at release tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded n_lo frontier was freshly confirmed with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; the first blocker was C2275/C2065 at Objects/obmalloc.c(1569) on the late arena_map_bot_t *n_lo. Hermes coding-subagent dispatch could not start because the Anthropic package is missing and lazy installs are disabled. A focused Codex CLI lane (codex-cli 0.153.4, workspace-write, ephemeral; session 01a112f7-89f4-7122-9f20-3c7d6c856113) performed strict TDD. It extended only the existing arena-map test, observed expected RED before the source edit, then hoisted only n_lo to the function's declarations and changed its former initialized declaration to assignment at the original point after the overflow assertion. Existing null handling, rollback, and later i3_next declaration remain unchanged. The lane hash/inventory comparison confirmed every other pre-existing file remained byte-identical.

Exact verification:

Pre-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2065 at obmalloc.c(1569) for arena_map_bot_t *n_lo. Capture: build/cron-current/cron-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c — exit 1 with expected assertion that n_lo must be declared without initializer at function entry. The test also locks assignment/evaluation and control-flow order.
GREEN and focused obmalloc regressions: arena-map, allocator-name, default allocator, RawWcsdup/allocated-blocks, setup-allocators, and tracemalloc-init tests — all exit 0. Exact combined command: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/n-lo-regression-suite.log 2>&1 — exit 1. Many checks pass; the known unrelated numeric-dispatch check raises ValueError: substring not found. No suite-wide pass claimed. During the coding lane, an initial malformed batch invocation and a wrong header path also exited 1; the exact corrected combined command above passed all six scripts.
Post-change forced-fresh probe (same command as pre-change) — exit 2; total=101 compiled=100 cached=0 skipped=0. The line-1569 n_lo diagnostics are gone. First remaining errors are C2143/C2065 at obmalloc.c(1576-1577) for the distinct late i3_next declaration; later errors at arena_map_is_used() and pool declarations are separate and untouched. Capture: build/cron-current/post-n-lo.log.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py — exit 0. Nested HEAD/tag remain exact. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py, and this status entry. This is compiler-probe progress only. Next: perform a fresh forced-fresh probe before edits; if the frontier remains, address only i3_next in arena_map_mark_used() as a separate TDD slice. No commit or push.

Latest run (`arena_base_next` C89 declaration hoisted; frontier advances)

Date: 2026-10-06 18:34 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, compatibility patch regeneration, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded next blocker after the prior arena_map_mark_used() declarations was freshly confirmed with a forced-fresh VC6/Wine source-list probe. _blake2/blake2s_impl.c compiled; first diagnostics were C2275/C2146/C2065 at Objects/obmalloc.c(1562) for late uintptr_t arena_base_next. The required Hermes coding-subagent attempt failed before startup because the Anthropic package is missing and lazy installs are disabled. A focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a1127d-d96c-7162-b2b7-43f5313f1b89) followed TDD. It extended the existing arena-map test to require the entry declaration and preserve initialization at the original assignment point, observed expected RED before production edits, then hoisted only this declaration. arena_map_mark_used() control flow and all later declarations/functions remain unchanged.

Exact verification:

Baseline and working-tree check: outer branch main; nested CPython exact tag/commit v3.11.16 / 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Existing dirty and untracked state retained.
Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First errors C2275/C2146/C2065 at obmalloc.c(1562) on uintptr_t arena_base_next. Capture: build/cron-current/cron-reprobe.log.
TDD RED: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c — exit 1 after extending the test, expected assertion that n_hi, i3, tail, arena_base_next must be declared without initializers at entry. The unmodified existing test passed before extension.
GREEN and focused obmalloc checks: arena-map, allocator-name, default allocator, RawWcsdup/allocated-blocks, setup-allocators, and tracemalloc-init scripts — all exit 0. The RawWcsdup test also compiled/exercised its C89 harness.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Numeric-dispatch check still raises ValueError: substring not found; captured in build/cron-current/arena-base-next-regression.log (line 238). Other logged checks passed; no suite-wide pass claimed.
Post-change forced-fresh probe (same command) — exit 2; total=101 compiled=100 cached=0 skipped=0. The line-1562 diagnostics are gone. The first remaining blocker is C2275/C2065 at obmalloc.c(1569) for the separate late arena_map_bot_t *n_lo; later i3_next, arena_map_is_used(), and pool declarations remain untouched. Capture: build/cron-current/post-arena-base-next.log.
Scoped nested git diff --check -- Objects/obmalloc.c and outer git diff --check -- scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py — exit 0. Exact CPython baseline unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py, and this status log. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced-fresh probe before edits; if the frontier remains, address only the separate late arena_map_bot_t *n_lo declaration in arena_map_mark_used() with its own TDD slice. No commit or push.

Previous latest run (arena_map_mark_used C89 declarations hoisted; frontier advances)

Date: 2026-10-06 16:15 UTC

The recorded radix-tree frontier was freshly confirmed before editing using forced-fresh MSVC600 through Wine. _blake2/blake2s_impl.c compiled; the first stable blocker was the late n_hi, i3, and tail declarations inside arena_map_mark_used() in Objects/obmalloc.c. Hermes coding-subagent delegation failed before startup because the Anthropic package is missing and lazy installs are disabled. Used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a11203-e64a-7843-943c-0fa3d62a875e) for strict TDD. It added a focused order/declaration regression, observed expected RED before production edits, then hoisted only those three declarations to function entry. Their initializations remain after the original assertion, null check, and index evaluation at their original execution points. No neighboring arena_map_is_used() or later declaration families were changed. The coding lane's preservation check reported all 134 pre-existing changed/untracked files unchanged except for the intended source slice; it made no status-log edit.

Exact verification:

Baseline check: outer branch main at 35caf1a558e6b2c5bf501894d8972f8b0dd828a6; nested CPython exact tag/commit verified as v3.11.16 / 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Initial outer dirty state preserved.
Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics C2143 at obmalloc.c(1539), followed by C2143 at (1544) and C2275/C2146 for int32_t tail at (1545). Capture: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791303333-689202-aea0.log.
TDD RED: python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c — exit 1 before source edit; expected assertion that n_hi, i3, and tail must be declared at function entry.
Focused GREEN and directly applicable obmalloc checks: the new arena-map test, vc6-obmalloc-rawwcsdup-c89.test.py, allocator-name, default-allocator, setup-allocators, and tracemalloc-init scripts — all exit 0. RawWcsdup script's C89 compile/runtime harness passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Many checks, including _thread, tracemalloc, and object regressions, pass. Existing numeric-dispatch check still raises ValueError: substring not found; no unrelated failures were changed. Capture: build/cron-current/regression.log.
Post-change forced-fresh probe (same command as pre-change, captured in build/cron-current/post-arena-mark-used.log) — exit 2; total=101 compiled=100 cached=0 skipped=0. The errors at lines 1539-1545 are gone and compilation passes through the edited declarations. First remaining diagnostic is C2275 at obmalloc.c(1562) for the separate late uintptr_t arena_base_next declaration, followed by independent late n_lo and i3_next declarations and then arena_map_is_used() C89/type diagnostics. These are not addressed in this slice.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py — exit 0. Baseline tag/commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced-fresh probe before any change; then address only the first current declaration blocker (arena_base_next in the else branch) with a separate TDD slice, preserving its original evaluation point. No commit or push.

Previous latest run (fresh radix-tree frontier confirmed; coding lane unavailable)

Date: 2026-10-06 14:14 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference. Preserved all existing outer and detached CPython modifications; no reset, clean, stash, discard, commit, push, patch regeneration, or publication. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _Py_GetAllocatedBlocks() fix remains present, but the recorded next-frontier summary was broad. A forced-fresh VC6/Wine source-list probe now confirms the actual first stable blocker is within arena_map_mark_used() in Objects/obmalloc.c: late declarations at lines 1539 (arena_map_bot_t *n_hi), 1544 (int i3), and 1545 (int32_t tail). Later declarations in the same function and the distinct arena_map_is_used() function remain separate; no source/test implementation was made. A focused Hermes coding-agent lane was attempted as required, but failed before startup because the Anthropic provider package is missing and lazy installs are disabled. No source edits were made.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-reprobe.log 2>&1 — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First compiler diagnostics: C2143 at obmalloc.c(1539) and (1544); then C2275/C2146 for int32_t tail at (1545). Further errors at lines 1558 onward include distinct late declarations and cascades. Capture: build/cron-current/cron-reprobe.log.
Focused existing regression: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c — exit 0; allocated-block and RawWcsdup checks passed.
bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/cron-regression.log 2>&1 — exit 1; existing unrelated numeric-dispatch assertion raised ValueError: substring not found. No broad-suite pass claimed.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- PORT_STATUS.md — exit 0.

Files changed this run: PORT_STATUS.md only. This is diagnostics/compiler-probe evidence, not a linked pythoncore.dll/python.exe, Wine interpreter run, or Windows 98 SE result. Next: once a focused coding agent can start, TDD only the arena_map_mark_used() declaration-order family, preserving initializer evaluation points; do not change arena_map_is_used() or address separate type/API blockers. No commit or push.

Latest revision (`_Py_GetAllocatedBlocks` base declaration made C89-compatible; frontier advances)

Date: 2026-10-06 UTC

The recorded _Py_GetAllocatedBlocks() frontier was freshly confirmed with forced-fresh MSVC600/Wine probing. _blake2/blake2s_impl.c compiled; the first blocker was C2143 at Objects/obmalloc.c(1311) on the late uintptr_t base declaration, followed by C2065 base at line 1314. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a11117-24ea-7ee0-bdcf-6a66cfbea801) followed TDD. It extended the existing scripts/vc6-obmalloc-rawwcsdup-c89.test.py, observed RED before production edit, then hoisted only uintptr_t base into the function declaration group and converted the former initialized declaration to assignment at its original point after the arena skip. No other production statements or control flow were changed. A content-hash snapshot verified all 132 other pre-existing dirty/untracked files remained unchanged.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/reprobe.log 2>&1 — script exit 2 (compiler source-list failure); total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics C2143 at obmalloc.c(1311), then C2065 base at 1314. Capture: build/cron-current/reprobe.log.
TDD RED before production edit: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c — exit 1 with the expected _Py_GetAllocatedBlocks must declare uint i and uintptr_t base at entry and preserve loop operations assertion.
Focused GREEN: same command — exit 0; both allocated-block C89/order and RawWcsdup C89 runtime checks passed.
Focused obmalloc regressions: allocator-name, default allocator, setup-allocators, and tracemalloc-init scripts (the latter with cpython/Include/internal/pycore_pymem.h) — all exit 0. One initial tracemalloc invocation used a nonexistent pycore_tracemalloc.h and exited 1; corrected invocation passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/regression.log 2>&1 — exit 1; existing ValueError: substring not found regression failure remains. No broad-suite pass claimed.
Post-change forced-fresh probe (same command as pre-change, output build/cron-current/postprobe.log) — exit 2; total=101 compiled=100 cached=0 skipped=0. The line-1311/1314 diagnostics are gone; remaining obmalloc failures concern distinct radix-tree/C89/type issues, first visible at lines 1539 onward. _blake2/blake2s_impl.c compiled. No claim that obmalloc.c fully compiles.
Scoped nested and outer git diff --check — exit 0. CPython exact tag/commit checks passed.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and this status log. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: freshly re-probe before edits; inspect only the first stable current compiler diagnostic within the still-failing obmalloc.c translation unit. No commit or push.

Previous latest revision (`_Py_GetAllocatedBlocks` loop declaration made C89-compatible; frontier advances)

Date: 2026-10-06 09:54 UTC

Read this status, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved the pre-existing dirty outer worktree and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_Strdup() frontier was re-probed before editing. The forced-fresh MSVC600/Wine source-list probe passed _blake2/blake2s_impl.c; first blocker remained Objects/obmalloc.c(1304), the C99 for (uint i = ...) declaration in _Py_GetAllocatedBlocks(). Hermes subagent delegation was unavailable because the runtime lacks the anthropic package and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write) performed the TDD slice: extended the existing untracked scripts/vc6-obmalloc-rawwcsdup-c89.test.py with a function-body/order assertion, observed RED before production edit, then hoisted only uint i into the function declaration group and changed the loop initializer to assignment. Loop bound, iteration, skip behavior, and accumulation are retained. All other local work was preserved.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First errors C2143 at obmalloc.c(1304) on the for declaration, followed by undeclared i; later C89 and arena-map/type errors were distinct. Capture: build/cron-current/preprobe.log.
TDD RED: focused assertion in scripts/vc6-obmalloc-rawwcsdup-c89.test.py was reported by the coding lane as failing before the source edit because the entry declaration/C89 loop spelling was absent. (The lane's terminal transcript was truncated to its final diff in the returned output.)
Focused GREEN/regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all five passed.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Existing unrelated console type detection/cleanup-order assertion and numeric-dispatch (ValueError: substring not found) failures persist; no broad-suite pass claimed.
Post-change forced-fresh probe (same command) — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled; prior line-1304 diagnostics are gone. First remaining errors are C2143 at obmalloc.c(1311) and C2065 base at 1314, followed by separate allocator arena-map/API/type issues. Capture: build/cron-current/postprobe.log.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- scripts/vc6-obmalloc-rawwcsdup-c89.test.py, CPython baseline tag/commit checks — exit 0. No commit or push.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and this status log. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced probe before any change; likely inspect the next declaration at obmalloc.c(1311) while keeping later arena-map/type/API diagnostics separate.

Previous latest revision (`_PyMem_Strdup` C89 declarations hoisted; probe advances)

Date: 2026-10-06 07:27 UTC

Read PORT_STATUS.md, README.md, and the active CPython Win9x/MSVC6 reference before acting. Preserved the dirty outer worktree and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The previously recorded _PyMem_Strdup() frontier was revalidated with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled and the first failing translation unit was Objects/obmalloc.c; VC6 reported C2143 at lines 713-714 before the late size_t size / char *copy declarations, then undeclared-variable cascades. One focused Codex CLI lane (0.153.4, workspace-write; session 01a11020-6ea2-7702-91e3-42cfddc5ea95) followed TDD: added an assertion for _PyMem_Strdup() to scripts/vc6-obmalloc-rawwcsdup-c89.test.py, observed the expected RED before production edits, then hoisted only those two declarations to function entry and retained initialization after assert plus allocation/null/copy/return order. A file-hash and inventory comparison confirmed every other dirty/untracked file was preserved.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. First errors C2143 at obmalloc.c(713-714), then C2065 cascades for copy and size. _blake2/blake2s_impl.c compiled.
TDD RED: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c — exit 1 with expected _PyMem_Strdup must use C89 entry declarations and preserve operation order assertion.
Focused GREEN/regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all five passed. An earlier tracemalloc invocation omitted its required header argument and exited 1; the corrected exact command above passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; existing unrelated console type detection/cleanup ordering and numeric-dispatch (ValueError: substring not found) assertions persist. The obmalloc tests passed; no broad-suite pass claimed.
Post-change forced-fresh probe (same as pre-change, redirected to build/cron-current/strdup-post.log) — exit 2; total=101 compiled=100 cached=0 skipped=0. The _PyMem_Strdup() diagnostics at lines 713-719 are gone. Next first compiler error is C2143 at obmalloc.c(1304) for a for loop declaration; subsequent failures include the distinct obmalloc C89/API issues (including missing int32_t-related type parsing) and remain untouched. Compiler probe only.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and exact CPython tag/commit checks — exit 0; baseline unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and this status log. This is not a linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE verification. Next frontier: fresh forced probe before any further edits, then isolate the earliest remaining obmalloc.c C89 loop declaration at line 1304 as its own TDD slice. No commit or push.

Previous latest revision (fresh VC6 frontier confirmed; focused implementation delegation unavailable)

Date: 2026-10-06 01:05 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_RawStrdup() frontier was freshly confirmed with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; the first failing translation unit remains Objects/obmalloc.c. First stable errors are C2143 at lines 697-698 on declarations after assert, with C2065 cascades for copy and size. The neighboring _PyMem_Strdup() errors at 710-711 and later obmalloc diagnostics are distinct and untouched. One focused coding-agent delegation for the single _PyMem_RawStrdup() slice was attempted, but did not start because the Hermes runtime lacks the anthropic package and lazy installs are disabled. No production or test edits were made; this run is diagnostics-only.

Exact verification:

Forced-fresh VC6/Wine probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics C2143 at obmalloc.c(697-698), followed by C2065 copy and size cascades. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791248452-462887-c640.log.
Focused obmalloc regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all four passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The relevant obmalloc checks passed; two known unrelated failures persist: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). No suite-wide pass claimed.
Delegation attempt for only _PyMem_RawStrdup() — failed before agent startup: missing anthropic package; lazy installs disabled. No child edits were applied.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- PORT_STATUS.md, and CPython exact tag/commit checks — exit 0; baseline unchanged.

Files changed this run: PORT_STATUS.md only. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: retry one focused TDD coding lane when delegation is available, limited to _PyMem_RawStrdup()'s declaration family; keep _PyMem_Strdup() and later obmalloc blockers separate.

Date: 2026-10-05 22:59 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference first. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_RawStrdup() frontier was forced-fresh re-probed and remains current. The source-list compile built _blake2/blake2s_impl.c and Objects/object.c; Objects/obmalloc.c is the first failing translation unit. First stable errors are C2143 at lines 697 and 698, before size_t size and char *copy declarations following assert(str != NULL), then C2065 cascades for copy and size. This confirms the frontier but not a source fix. Per the required workflow, one focused coding-subagent delegation was attempted for this function only and failed before startup because Hermes lacks the anthropic package and lazy installs are disabled. No source or test edits were made; this run is diagnostics-only.

Exact verification:

Forced-fresh VC6/Wine probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable compiler diagnostics are C2143 at obmalloc.c(697-698), with C2065 cascades at 699/702. Later independent C89/API diagnostics remain in obmalloc.c and were not addressed. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791240907-436248-f100.log.
Focused obmalloc regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all four passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The relevant obmalloc checks pass; the two known unrelated failures persist: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). No broad-suite pass claimed.
Focused implementation delegation for only _PyMem_RawStrdup() — failed before agent startup: missing anthropic package; lazy installs disabled. No source/test edits were applied.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- PORT_STATUS.md, and CPython exact tag/commit checks — exit 0; baseline unchanged.

Files changed this run: PORT_STATUS.md only. All pre-existing changes remain preserved. This is compiler-probe evidence only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: retry a focused TDD coding lane when delegation is available, limiting implementation to the declaration family in _PyMem_RawStrdup(); otherwise continue diagnostics only. Keep _PyMem_Strdup() and later obmalloc blockers separate. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The prior status recorded the post-_PyMem_RawWcsdup() next probe as blocked at Wine startup, so the compiler frontier was unverified. A forced-fresh probe now ran successfully through the source list. _blake2/blake2s_impl.c and Objects/object.c compiled. The first stable VC6 errors are in the separate _PyMem_RawStrdup() at Objects/obmalloc.c(697-698): C2143 before size_t size, then before char *copy, followed by undeclared-variable cascades. The source confirms both declarations follow assert(str != NULL). _PyMem_Strdup() has a similar later issue at 710-711, but it is a distinct later function and remains untouched.

Attempted the required single focused coding-subagent delegation for only _PyMem_RawStrdup(); it failed before startup because Hermes lacks the anthropic package and lazy installs are disabled. Per the delegated-lane requirement, made no production or test edits. Ran current focused obmalloc regressions as diagnostics; all passed. The applicable broader harness still has its two known unrelated failures, so no broad-suite pass is claimed.

Exact verification:

Forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First errors: C2143 at obmalloc.c(697) and (698), followed by C2065 copy and size cascades. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791233276-411114-ad70.log.
Focused regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all four passed.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Known unrelated console type detection/cleanup order and numeric dispatch (ValueError: substring not found) failures remain; relevant obmalloc checks passed.
Delegation attempt for the one _PyMem_RawStrdup() TDD slice — failed before agent startup: missing anthropic package; lazy installs disabled. No source/test edits applied.
git -C cpython rev-parse HEAD, git -C cpython describe --tags --exact-match HEAD, outer git diff --check, and git -C cpython diff --check -- Objects/obmalloc.c — exit 0; baseline unchanged and scoped diffs clean.

Files changed this run: PORT_STATUS.md only. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: one test-first slice for _PyMem_RawStrdup() only after a focused coding lane is available; keep _PyMem_Strdup() and later obmalloc errors separate.

Previous latest revision (_PyMem_RawWcsdup C89 declarations hoisted; post-change VC6 probe blocked by Wine)

Date: 2026-10-05 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference first. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_SetupAllocators() frontier was stale. A forced-fresh VC6/Wine source-list probe passed _blake2/blake2s_impl.c, Objects/object.c, and the allocator setup functions; the actual first diagnostics were C2143/C2065 at Objects/obmalloc.c(674-675) in _PyMem_RawWcsdup(), for size_t len declared after assert. One focused Codex CLI lane (0.153.4, workspace-write; session 01a10d62-5acc-7532-8e6a-64eee226a083) hoisted only len, size, and str2 to the function's declaration group and changed their original declarations to assignments at the same execution points. The overflow guard, allocation, failure return, copy size, and return order are unchanged.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics C2143 at obmalloc.c(674) before type, C2065 len at 675, with distinct C89 declarations later in adjacent helpers and other obmalloc code. Full capture: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791225631-384995-c8a0.log.
TDD RED: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c — exit 1 before the source edit; generated C harness failed under -std=c89 -pedantic-errors on the original mixed declarations at lines 33 and 38. The first harness invocation also exposed an unescaped regex-quote construction error, corrected before the expected RED; no production edit preceded the RED.
GREEN after source edit: same focused command — exit 0; generated exact-function C89 harness passed copy, empty-string, allocation-failure, and overflow/order checks.
Existing focused obmalloc allocator-name, default-allocator, setup-allocators, and tracemalloc-init regressions — exit 0. Applicable full regression harness was not run in this slice.
Post-change forced-fresh probe (same command) — exit 1 before any compiler invocation; Wine reported sock_init: ERROR in sock_check_pollhup() and wineserver: error creating /run/user/1000/wine/server-801-136fb0/lock: Read-only file system, summary total=1 compiled=0 cached=0 skipped=0. This is a Wine startup failure, not compiler evidence; next compiler frontier is unverified. A retry was not made to avoid repeatedly invoking a broken shared Wine server.
git -C cpython diff --check -- Objects/obmalloc.c and outer git diff --check -- scripts/vc6-obmalloc-rawwcsdup-c89.test.py — exit 0. Baseline commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and this status entry. This is source-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: restore a writable Wine server runtime and run the forced-fresh probe before choosing any further edit; only then follow its first stable compiler blocker (expected adjacent helper declarations are not yet confirmed as frontier).

Previous latest revision (_PyMem_SetupAllocators pymalloc declaration moved before statements)

Date: 2026-10-05 16:38 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before working. Preserved the existing dirty outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _blake2/blake2s_impl.c sequence was verified with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c and Objects/object.c compiled. The first blocker was Objects/obmalloc.c(349): C2275/C2146/C2065/C2059 on the late PyMemAllocatorEx pymalloc = PYMALLOC_ALLOC declaration after the RAW allocator registration in _PyMem_SetupAllocators(). Native coding-subagent delegation failed because the Hermes runtime lacks the anthropic package; one focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a10ce7-820c-7ee3-9e1f-ecb1c0f5a7bd) followed TDD. It added scripts/vc6-obmalloc-setup-allocators-c89.test.py, observed expected RED before the production edit, then moved only the pymalloc initialized declaration above the first statement. All initializer values and RAW/MEM/OBJ/debug-hook order are retained. No subsequent obmalloc.c diagnostics were changed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled; first diagnostics were C2275/C2146/C2065/C2059 at line 349. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791217565-339027-c050.log.
TDD RED: python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c — exit 1; expected assertion both allocator initializers must precede the first statement for C89.
GREEN and focused regressions: setup-allocators, default-allocator, and tracemalloc-init scripts — all exit 0. The setup test confirms field values and RAW/MEM/OBJ/debug order.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/cron-current/regression-suite.log 2>&1 — exit 1. Two pre-existing unrelated failures remain: console type detection/cleanup ordering and numeric dispatch (ValueError: substring not found). No suite-wide pass claimed.
Post-change forced-fresh probe (same exact command as before-change) — exit 2; total=101 compiled=100 cached=0 skipped=0. The line-349 diagnostics are gone; first remaining diagnostics are C2275/C2146/C2065/C2059 at obmalloc.c(412-414) for separate dbg_raw, dbg_mem, and dbg_obj initializers. Later errors untouched. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791218002-339027-ce90.log.
Scoped outer/nested git diff --check — exit 0. Baseline tag/commit unchanged. Preservation snapshot from the coding lane reports all other 130 pre-existing dirty/untracked files unchanged; this is consistent with the observed scoped diff/status.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-setup-allocators-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: fresh forced-fresh probe before edits, then address only the new first blocker at obmalloc.c(412-414) involving the three debug allocator declarations with TDD; retain all later diagnostics and the known unrelated regression failures separately.

Previous latest revision (default allocator switch assignments made VC6-compatible)

Date: 2026-10-05 UTC

Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. One focused Codex CLI lane (codex-cli 0.153.4, session 01a10c6e-4002-7c23-93c1-b9f41270f3ed, workspace-write) was used for the one implementation slice; no commit or push.

The recorded _blake2/blake2s_impl.c frontier was freshly rechecked before editing. The source compiled, and the actual first blocker was the three cast-to-braced-initializer assignments in pymem_set_default_allocator() (obmalloc.c lines 244, 247, 250), rejected by VC6 with C2059 on {. Strict TDD updated the focused default-allocator test first and observed RED. The minimal production change wraps each RAW/MEM/OBJ case in a C89 block, initializes a local PyMemAllocatorEx from the same allocator macro, then copies it into new_alloc. Branch selection, allocator fields (including context and all callbacks), setter/debug-hook ordering, and return behavior are retained. No subsequent obmalloc.c errors were changed.

Exact commands and results:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic group: C2059 { at obmalloc.c(244), (247), (250). Full captured output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791209613-304480-c2b0.log.
TDD RED: python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c — exit 1 before production edit, expected failure that switch assignments/order did not match the VC6-compatible local-copy semantics.
GREEN and focused regression: same default-allocator command — exit 0; obmalloc default allocator C89 assignments, allocator semantics, and execution order: PASS.
Tracemalloc regression: python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; positional initializer defaults match header field order.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/obmalloc-slice-frontier-test.log 2>&1 — exit 1. Two known unrelated checks remain failing: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). No suite-wide pass claimed.
Post-change forced-fresh probe (same command as pre-change) — exit 2; total=101 compiled=100 cached=0 skipped=0. The former C2059 diagnostics at lines 244/247/250 are gone. The first remaining group is at obmalloc.c(349): C2275/C2146/C2065/C2059 for PyMemAllocatorEx pymalloc and its braced initializer in a separate allocator setup function; leave this declaration/initializer family for the next slice. Further diagnostics in obmalloc.c are distinct and untouched. Full output: build/cron-current/post-allocator-probe.log.
git -C cpython diff --check -- Objects/obmalloc.c, git diff --check -- scripts/vc6-obmalloc-default-allocator-c89.test.py, and baseline git -C cpython rev-parse HEAD — exit 0; baseline hash unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-default-allocator-c89.test.py, and this status entry. A pre-edit snapshot confirmed no other pre-existing dirty/untracked file content changed by the focused coding lane. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: perform a fresh forced-fresh probe, then use TDD on only the new first blocker, PyMemAllocatorEx pymalloc in _PyMem_SetupAllocators(); keep later obmalloc declarations, designated initializers, allocator-map/platform compatibility errors, and the two unrelated regression failures separate.

Latest revision (tracemalloc configuration initializer converted for VC6)

Date: 2026-10-05 09:57 UTC

The recorded _blake2/blake2s_impl.c state was verified with a forced-fresh MSVC600/Wine source-list probe before editing. _blake2/blake2s_impl.c and Objects/object.c compiled. First blocker remained Objects/obmalloc.c(89), C2059 on . in _PyTraceMalloc_Config_INIT's C99 designated initializer. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a10b79-c7ce-7ce2-b7bd-003a9d5ef9ac) performed a strict TDD slice. It added scripts/vc6-obmalloc-tracemalloc-init-c89.test.py, first ran it RED against the original source, then replaced only the initializer in cpython/Objects/obmalloc.c with positional values TRACEMALLOC_NOT_INITIALIZED, 0, 1. Verified header field order is initialized, tracing, max_nframe; values preserve defaults. No later allocator/C89 errors were changed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostic: cpython\\Objects\\obmalloc.c(89) : error C2059: syntax error : '.'. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791193614-235796-7820.log.
TDD RED: python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 1; expected assertion _Py_tracemalloc_config must use a VC6-compatible positional initializer.
TDD GREEN and independent focused rerun: same command — exit 0; obmalloc tracemalloc C89 positional initializer: PASS (initialized=TRACEMALLOC_NOT_INITIALIZED, tracing=0, max_nframe=1).
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Tracemalloc and _thread regression checks passed. Two known unrelated failures remain: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). No suite-wide pass claimed.
Post-change forced-fresh probe (same command as before-change): exit 2; total=101 compiled=100 cached=0 skipped=0. The C2059 at obmalloc.c(89) is gone; obmalloc.c first reports C2275/C2146/C2065 at line 239 for late PyMemAllocatorEx new_alloc, followed by related initializer/cascade errors. Separate C89/API/type blockers remain untouched. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791193985-235796-2b10.log.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- scripts/vc6-obmalloc-tracemalloc-init-c89.test.py — exit 0. CPython baseline tag/commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-tracemalloc-init-c89.test.py, and PORT_STATUS.md. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: perform a fresh forced probe, then address only the first current obmalloc.c declaration family (PyMemAllocatorEx new_alloc near line 239) with TDD; keep subsequent initializer/declaration errors separate.

Previous latest revision (fresh VC6 frontier recheck; implementation lane unavailable)

Date: 2026-10-05 UTC

The recorded _blake2/blake2s_impl.c compiler state was rechecked using the forced-fresh source-list probe. _blake2/blake2s_impl.c and Objects/object.c compile; the actual first blocker has advanced to Objects/obmalloc.c(89), C2059 on . in the _PyTraceMalloc_Config_INIT designated initializer. A single focused implementation delegation was attempted for only that initializer family. Delegation could not start because the Hermes delegation runtime lacks the anthropic package and lazy installs are disabled. In keeping with the delegated-lane requirement, made no production or test edits; this run is diagnostics-only. Later obmalloc.c declaration/initializer errors were left untouched.

Exact verification:

Forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First compiler diagnostic: cpython\\Objects\\obmalloc.c(89) : error C2059: syntax error : '.'. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791186043-210799-43e0.log. The invocation ran VC6 cl.exe through Wine; it did not emit a standalone compiler version banner.
Focused delegation for the single line-89 initializer family — failed before agent startup: The 'anthropic' package is required ... venv: not installed and lazy installs are disabled: ['anthropic']. No delegated edits were applied.
Applicable regression suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The suite's relevant existing checks run; two known unrelated failures remain: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). No obmalloc-specific regression exists yet; no code was changed in this diagnostics-only run.
Worktree/baseline check: outer pre-existing dirty entries and detached CPython modifications were retained; cpython remains exactly at v3.11.16, 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier remains the single designated initializer at obmalloc.c(89); retry one focused TDD coding lane when delegation is available, preserving every other local change.

Previous latest revision (_PyTypes_FiniTypes loop counter made C89-compatible; frontier advances)

Date: 2026-10-05 UTC

The previously recorded frontier was freshly confirmed before editing. The forced-fresh MSVC600/Wine probe compiled _blake2/blake2s_impl.c and reached Objects/object.c; first diagnostics were C2143/C2065 at line 2093 for the C99 for (Py_ssize_t i=...) in _PyTypes_FiniTypes(). One focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a10a8c-b70d-7480-a8ec-5918918fecbd) extended scripts/vc6-object-notimplemented-c89.test.py, ran the new assertion RED (expected missing function-entry Py_ssize_t i), then hoisted only that loop counter to the function declaration group and reused it in the loop. Reverse bounds/traversal, main-interpreter guard, per-item type lookup and deallocation order are preserved. _PyTypes_FiniTypes()'s existing inner PyTypeObject *type is the first declaration in its loop block, so no change there was needed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics C2143/C2065 at object.c(2093) on the C99 loop declaration; dependent errors at 2095/2097. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791178068-168873-7820.log.
TDD RED: python3 scripts/vc6-object-notimplemented-c89.test.py cpython/Objects/object.c cpython/Include/cpython/object.h — exit 1; the new assertion failed as expected because _PyTypes_FiniTypes lacked entry Py_ssize_t i.
GREEN plus directly applicable object regressions: the focused NotImplemented/object checks, object C89, FunctionStr, InitState, RichCompare, descrobject/classmethod/dispatch, and genericaliasobject scripts passed (exit 0). Independent rerun of NotImplemented, object C89, InitState, FunctionStr, RichCompare and descrobject checks — exit 0. RED/GREEN and focused-suite transcript: /tmp/vc6-finitypes-tdd.log, /tmp/vc6-finitypes-checks.log.
Applicable suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new object regression and most checks pass; two known unrelated failures persist: console type lookup/cleanup ordering and numeric dispatch (ValueError: substring not found). Captured rerun: build/cron-current/regression-suite.log.
Post-change forced-fresh probe (same command) — exit 2; total=101 compiled=100 cached=0 skipped=0. object.c now compiles past _PyTypes_FiniTypes; first blocker advances to Objects/obmalloc.c(89), C2059 on . in a designated initializer. Following diagnostics include distinct C89 declarations and related cascades; untouched. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791178483-168873-7360.log.
Scoped outer/nested git diff --check — exit 0. CPython tag and commit remain unchanged.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-notimplemented-c89.test.py, and this log. This is compiler-probe progress only; no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is claimed. Next frontier: fresh forced probe before edits, then a single TDD slice addressing only the first stable obmalloc.c(89) designated-initializer error. Existing suite failures and all earlier local work remain preserved.

Previous latest revision (_PyTypes_InitTypes loop counter made C89-compatible; frontier advances)

Date: 2026-10-05 UTC

Re-ran a forced-fresh MSVC600/Wine source-list probe before editing because the previous recorded frontier might be stale. _blake2/blake2s_impl.c compiled; the actual first blocker was no longer the recorded PyStatus declaration. Objects/object.c produced C2143/C2065 on the C99 loop declaration in _PyTypes_InitTypes() at line 2060, followed by a separate C99 loop declaration in _PyTypes_FiniTypes() at line 2091. Used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a10a11-ceb3-73f1-b38b-42541af4a989) for a strict TDD slice. It first extended scripts/vc6-object-notimplemented-c89.test.py and verified RED against the original source. Then it hoisted only size_t i; to _PyTypes_InitTypes()'s entry declaration group and changed that loop to use i; loop bounds, body, and earlier legacy type initialization order are preserved. _PyTypes_FiniTypes() was not edited.

The existing scripts/vc6-descrobject-classmethod-c89.test.py also asserted the old _PyTypes_InitTypes() loop spelling. Updated only that assertion to require the entry declaration and C89 loop spelling/order, so the directly applicable regression remains valid after this slice.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR=/home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x/build/cron-current/runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable errors C2143/C2065 at object.c(2060) for for (size_t i=...); a separate loop declaration produced C2143/C2065 at line 2091. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791170011-133815-15b0.log.
TDD RED: python3 scripts/vc6-object-notimplemented-c89.test.py cpython/Objects/object.c cpython/Include/cpython/object.h — exit 1 with the expected assertion _PyTypes_InitTypes must declare size_t i before the interpreter guard.
GREEN: same command after source edit — exit 0; NotImplemented's 36 positional slots and the new init-loop declaration/order checks passed.
Focused object regressions: NotImplemented, object C89, object FunctionStr, object initstate, object richcompare, classobject type initialization, descrobject classmethod/dispatch, and genericaliasobject scripts — all exit 0. In particular, the formerly stale descrobject test passes against the updated source.
Applicable suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The descrobject type-initialization check now passes. Two known unrelated failures remain: console type lookup/cleanup-order check and numeric-dispatch check (ValueError: substring not found); other reported checks passed.
Post-change forced-fresh probe (same command as before-change probe) — exit 2; total=100 compiled=99 cached=0 skipped=0. The former line-2060 diagnostics are gone; object.c now reaches the distinct _PyTypes_FiniTypes() loop at line 2091, reported C2143/C2065 on Py_ssize_t i, with dependent diagnostics for type. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791170515-133815-d60.log.
git -C cpython diff --check -- Objects/object.c and outer git diff --check -- scripts/vc6-object-notimplemented-c89.test.py scripts/vc6-descrobject-classmethod-c89.test.py — exit 0. CPython baseline tag/commit unchanged.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-notimplemented-c89.test.py, scripts/vc6-descrobject-classmethod-c89.test.py, and this status log. This is compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is claimed. Next frontier: fresh forced probe before edits; then address only _PyTypes_FiniTypes()'s C99 loop declaration, preserving reverse deallocation order and the rest of the function.

Previous revision (NotImplemented number slot positional initializer; VC6 frontier advances)

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or compatibility-patch regeneration. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Initial dirty state included PORT_STATUS.md, existing object regression scripts, extensive nested CPython edits, and existing untracked files; these were retained. The external coding-agent delegation API was unavailable (anthropic package missing; lazy installs disabled), so one focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a1091f-9e57-7953-8495-1504b1a42b03) performed the narrow implementation slice. No commit or push.

Fresh forced-fresh MSVC600/Wine source-list probe reconfirmed _blake2/blake2s_impl.c compiles, but the recorded _PyObject_GetMethod frontier was stale. The actual first blocker was C2059 syntax error '.' at cpython/Objects/object.c(1815), the C99 designated initializer .nb_bool = notimplemented_bool in notimplemented_as_number. Verified PyNumberMethods field order from cpython/Include/cpython/object.h: 36 slots, nb_bool is slot 10. Added new focused regression scripts/vc6-object-notimplemented-c89.test.py, first ran it RED against the designated initializer, then replaced only that initializer with 36 explicit positional entries; nb_bool keeps notimplemented_bool, all other slots are zero. This test checks field order and every value against the CPython header.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=100 compiled=99 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostic: C2059 at object.c(1815) on .. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791154112-60826-2b0.log.
TDD RED: python3 scripts/vc6-object-notimplemented-c89.test.py cpython/Objects/object.c cpython/Include/cpython/object.h — exit 1, expected assertion notimplemented_as_number must use a VC6-compatible positional initializer.
TDD GREEN and focused object regressions: python3 scripts/vc6-object-notimplemented-c89.test.py cpython/Objects/object.c cpython/Include/cpython/object.h && python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 0; all object checks passed, including validation of the 36 header-ordered slots.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; the known unrelated console type-detection/cleanup-order assertion and numeric-dispatch check (ValueError: substring not found) remain failing. Numerous other checks passed; no suite-wide pass claimed.
Post-change forced-fresh VC6 probe (same command as initial probe) — exit 2, total=100 compiled=99 cached=0 skipped=0. The former C2059 at line 1815 is gone and no designated-initializer diagnostic remains. The first remaining errors are C2275/C2146/C2065 at object.c(1906) for late PyStatus status; subsequent loop-declaration errors at lines 2058 and 2089 are separate and untouched. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791154525-60826-b00.log.
Codex lane preservation snapshot confirmed only the designated initializer changed within object.c and all 124 other pre-existing dirty/untracked files were unchanged during its edit. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is claimed.

Files changed in this slice: cpython/Objects/object.c, new scripts/vc6-object-notimplemented-c89.test.py, and this status entry. This is compiler-probe progress only. Next frontier: perform a fresh forced-fresh probe before touching the late PyStatus status declaration around line 1906; use TDD for that single declaration family and preserve subsequent loop diagnostics separately.

Previous revision (_PyObject_GetMethod ordinary-dict attr declaration reused; VC6 retry blocked by Wine runtime)

Date: 2026-10-04 20:46 UTC

Read PORT_STATUS.md, README.md, and the invoked CPython Win9x/MSVC6 reference guidance before acting. The named reference file was not found in the repository. Preserved all existing outer and detached CPython edits; no reset, clean, stash, discard, commit, push, or compatibility-patch regeneration. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Initial dirty state included PORT_STATUS.md, object regression scripts, and extensive nested CPython source changes; these were retained.

The recorded _PyObject_GetMethod ordinary-dict PyObject *attr frontier was confirmed by a successful forced-fresh VC6/Wine source-list probe immediately before implementation: 99/100 TUs compiled, including _blake2/blake2s_impl.c, and the first compiler diagnostic was C2275 at Objects/object.c(1231). A focused Codex CLI lane (codex-cli 0.153.4, workspace-write; session 01a108aa-4298-7190-ae47-64878df51251) followed test-first procedure. Extended the existing untracked scripts/vc6-object-richcompare-c89.test.py; it failed RED against the current source because the ordinary-dict branch redeclared PyObject *attr. Then changed only that declaration to assignment reusing the function-entry attr local already used in the mutually exclusive managed-dict branch. The lookup remains after Py_INCREF(dict); dictionary lookup, result assignment, decref/error cleanup, and branch order are unchanged. No other production source changed in this slice.

Exact verification:

Before-edit forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=100 compiled=99 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; first stable error C2275 at object.c(1231). Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791146440-32913-5a70.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected assertion detecting duplicate ordinary-dict attr declaration. GREEN after source edit — exit 0; all object-richcompare script assertions passed.
Focused regressions python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c, python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c, python3 scripts/vc6-classobject-typeinit.test.py cpython/Objects/classobject.c cpython/Objects/object.c, python3 scripts/vc6-descrobject-classmethod-c89.test.py cpython/Objects/descrobject.c cpython/Objects/object.c, and python3 scripts/vc6-genericaliasobject-c89.test.py cpython/Objects/genericaliasobject.c cpython/Objects/object.c — all exit 0.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/vc6-ordinary-attr-suite.log 2>&1 — exit 1; 260 checks passed, two known unrelated failures remain (console type-detection order and numeric-dispatch helper ValueError: substring not found).
Requested post-change forced-fresh probe (same exact command as the initial probe) — exit 1 before compiler startup: sock_init: ERROR in sock_check_pollhup() and wineserver: error creating /run/user/1000/wine/server-801-136fb0/lock: Read-only file system. The harness consequently reported first compile blocker: cpython/Modules/getpath.c, total=1 compiled=0 cached=0 skipped=0; this is a Wine startup failure, not a C diagnostic. No post-change compiler frontier is verified. Full attempt output is in the terminal capture /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791146737-32913-fc0.log.
No post-change VC6 probe success, linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is claimed. Next: resolve writable Wine server runtime placement and repeat a forced-fresh probe before advancing to any later object.c errors (1815, 1871+, 2023+).

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry. The compatibility patch was not regenerated. No commit or push.

Previous latest revision (_PyObject_GetMethod managed-dict attr declaration hoisted; frontier advances)

Date: 2026-10-04 18:27 UTC

Re-probed the recorded frontier before editing. The status was current: forced-fresh VC6/Wine source-list compile reached Objects/object.c; _blake2/blake2s_impl.c compiled. The first errors were C2143/C2065 on the late managed-dict PyObject *attr at object.c(1218-1219). Used one focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write; session 01a10830-7a50-7612-b781-30c767c972df) for a strict TDD slice. Extended only the already-untracked scripts/vc6-object-richcompare-c89.test.py; the focused test failed RED before touching production source. Then hoisted only the managed-dict attr declaration into _PyObject_GetMethod()'s opening local declarations, changing its late initialized declaration to an assignment at the same lookup point. The separate ordinary-dict branch's attr was not touched. Lookup, branch, result assignment, error handling, and cleanup order remain asserted unchanged.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First blocker: C2143 at object.c(1218) before type, then C2065 attr at line 1219; following diagnostics were separate. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791138459-4193614-50.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected assertion _PyObject_GetMethod must declare attr exactly once without initializer at function entry; all prior object assertions passed.
TDD GREEN and independent focused regression rerun: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 0; all object richcompare/attribute/managed-dict checks, object C89 checks, and FunctionStr checks passed.
Forced-fresh post-change probe: XDG_RUNTIME_DIR="$PWD/build/cron-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. The former attr diagnostics at lines 1218-1219 are gone; object.c remains first failing translation unit, with its first remaining diagnostic C2275 at line 1231 for a separate late PyObject declaration in the ordinary-dict branch. Later C2059 at 1815, PyStatus/C89 failures at 1871+, and loop declaration failures at 2023+ remain distinct and untouched. Full output: build/cron-recheck/post-attr-probe.log.
git diff --check -- scripts/vc6-object-richcompare-c89.test.py and git -C cpython diff --check -- Objects/object.c — exit 0.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry. Compile-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: freshly probe before any new edits; then TDD one declaration family only, beginning with the ordinary-dict late PyObject *attr at object.c(1231). Keep the later independent blockers separate.

Previous latest revision (fresh VC6 frontier recheck; implementation delegated lane unavailable)

Date: 2026-10-04 UTC

Re-probed before editing because the recorded frontier might be stale. The recorded _PyObject_GetMethod state remains accurate: _blake2/blake2s_impl.c compiles, and the first stable blocker is the late PyObject *attr declaration at Objects/object.c(1218). The preceding PyDictValues *values diagnostic is cleared. A focused coding subagent was requested for this single implementation slice, but delegation failed because the Anthropic Python package is unavailable and lazy installs are disabled. Per the safe-stop constraint for this run, made no production or test edits; this is diagnostics-only.

Exact verification:

git status --short --branch (outer) — exit 0; pre-existing dirty state includes PORT_STATUS.md, scripts/vc6-object-c89.test.py, and untracked object regression scripts. No unrelated status entries were overwritten.
git status --short --branch && git describe --tags --exact-match HEAD && git rev-parse HEAD (nested CPython) — exit 0; detached checkout at v3.11.16, 41388c9cb160d0886d5ca00d2e6c878260a8a4549; numerous pre-existing nested modifications retained.
Forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: C2143 at object.c(1218) before type and C2065 attr at line 1219. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791130887-4170883-4b00.log.
Delegation attempt for exactly one _PyObject_GetMethod attr declaration slice — unavailable: anthropic package missing; lazy installs disabled. No child implementation was applied.

No tests were changed or run, and no source change was made. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier remains the single late PyObject *attr declaration at object.c(1218); retry a focused coding lane when available, then perform RED/GREEN, applicable regressions, and a fresh forced probe. Keep later diagnostics (including the separate declaration near line 1230) separate.

Latest revision (_PyObject_GetMethod values declaration hoisted; object.c frontier advances)

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. Baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Attempted the required focused coding-agent delegation, but it was unavailable because the Anthropic package is missing and lazy installs are disabled; Codex CLI 0.153.4 is installed, but no external CLI lane was started. Proceeded with one narrowly scoped direct TDD slice.

A forced-fresh VC6/Wine re-probe confirmed the recorded object.c frontier. _blake2/blake2s_impl.c compiled; first blocker was the late PyDictValues *values declaration in _PyObject_GetMethod() at object.c(1213). Extended the existing untracked scripts/vc6-object-richcompare-c89.test.py with a declaration/order assertion and observed RED (exit 1: missing function-entry values). Hoisted only PyDictValues *values beside the existing entry locals. The assignment remains in the original managed-dict condition; descriptor lookup, condition evaluation, and branch order are unchanged. No other production source was changed.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=100 compiled=99 cached=0 skipped=0. First diagnostics C2275/C2065 at object.c(1213) for late PyDictValues *values. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791122912-4136178-3100.log.
Focused TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected assertion that _PyObject_GetMethod declares values at function entry.
GREEN and focused object regressions: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 0; all checks passed, including declaration and managed-dict lookup order.
Applicable harness: MSVC600_ROOT=/dev/null bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; live integration intentionally skipped. New object assertion passes. Known unrelated console lookup/cleanup assertion and numeric dispatch (ValueError: substring not found) still fail.
Forced-fresh post-change VC6/Wine probe (same command as initial) — exit 2, total=100 compiled=99 cached=0 skipped=0. Former values diagnostics at line 1213 are gone; first errors now C2143/C2065 at lines 1218-1219 for the separate late PyObject *attr, followed by independent later diagnostics. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791123296-4136178-b950.log.
git -C cpython diff --check -- Objects/object.c and git diff --check -- scripts/vc6-object-richcompare-c89.test.py — exit 0. Baseline tag/commit unchanged.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry; all unrelated local changes preserved. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh probe, then test-first address only the first late PyObject *attr declaration at object.c(1218); leave subsequent declaration families separate.

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The referenced legacy-toolchain file was found at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md.

Re-probed the status-recorded frontier before editing. The stale _blake2/blake2s_impl.c entry point still compiles; the actual first blocker remained cpython/Objects/object.c in _PyObject_GetMethod(). A focused coding subagent could not be started because the Anthropic package is unavailable and lazy installs are disabled; codex CLI was present, but no external coding CLI was invoked. Proceeded with one focused test-first edit directly, preserving all unrelated dirty work.

Added assertions to the already-untracked scripts/vc6-object-richcompare-c89.test.py, first observing expected RED for the absent function-entry descr and f declarations. In cpython/Objects/object.c, hoisted only PyObject *descr and descrgetfunc f into the function-entry declaration group; retained _PyType_Lookup(tp, name) and f = NULL assignments at their original execution points. No subsequent declarations or other source areas were changed.

Exact verification:

Forced-fresh pre-change VC6/Wine command: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: C2275/C2065 at object.c(1196) for late PyObject *descr; C2275/C2146/C2065 at (1197) for late descrgetfunc f. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791114989-4103247-f820.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1 with the intended missing function-entry descr/f assertion. A preliminary test-regex iteration failed to locate the function (also exit 1); corrected the test itself before the expected RED. No production source was changed before the expected RED.
GREEN/focused regressions: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 0; all object C89/order assertions passed.
Applicable full harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. New object assertions passed. Known unrelated console type lookup/cleanup-order assertion still fails, as does numeric dispatch (ValueError: substring not found). No unrelated fixes attempted.
Forced-fresh post-change probe (same command) — exit 2; total=100 compiled=99 cached=0 skipped=0. Former diagnostics at object.c(1196-1197) are gone. Next first errors are C2275/C2065 at object.c(1213) for late PyDictValues *values; later C2143/C2065 at lines 1218-1219 concern another late declaration. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791115333-4103247-3ce0.log.
Scoped nested git diff --check -- Objects/object.c and outer git diff --check -- scripts/vc6-object-richcompare-c89.test.py — exit 0. CPython baseline tag and commit verified unchanged.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and PORT_STATUS.md. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh re-probe, then test-first inspect only the late PyDictValues *values declaration at object.c(1213); leave the later attr and other diagnostics for separate slices.

Latest revision (_PyObject_GetMethod C89 local hoisted; object.c frontier advances)

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and the invoked legacy-toolchain guidance before acting. The referenced on-disk python-3-win9x-msvc6.md was absent from both the active profile reference directory and repository search. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. Baseline remains tag v3.11.16, detached commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded object.c frontier remained current on a forced-fresh VC6/Wine source-list probe. _blake2/blake2s_impl.c compiled; first stable diagnostic was C2143 at Objects/object.c(1183) on the late PyTypeObject *tp = Py_TYPE(obj) in _PyObject_GetMethod. Coding-agent subagent dispatch was attempted but unavailable because the runtime lacks the anthropic package and lazy installs are disabled. Proceeded with a single narrowly scoped test-first edit directly; no external coding CLI was run.

Added an assertion to the existing untracked scripts/vc6-object-richcompare-c89.test.py, first ran it against the original source and observed expected RED (exit 1: _PyObject_GetMethod must declare tp exactly once without initializer at entry; all four existing object checks passed). Then moved only PyTypeObject *tp to the function-entry declaration group and changed its initializer to tp = Py_TYPE(obj); at the same original execution point. Assertion, type readiness check, subsequent dispatch, and cleanup order are unchanged.

Exact verification:

Forced-fresh pre-change: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. First stable diagnostic C2143 at object.c(1183) before type, followed by dependent C2065 tp and later separate C89 diagnostics. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791107101-4071333-8770.log.
Focused regression RED before production edit: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected missing function-entry tp declaration.
Focused regression GREEN after edit: same command — exit 0; richcompare, exception-context, PyObject_GetAttr, _PyObject_GetDictPtr, and _PyObject_GetMethod ordering assertions all passed.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The object checks, including the new assertion, pass. Existing unrelated console type lookup/cleanup order assertion and numeric dispatch (ValueError: substring not found) remain failing; no unrelated changes attempted.
Forced-fresh post-change probe (same command as above) — exit 2; total=100 compiled=99 cached=0 skipped=0. The former line-1183 diagnostic is gone. First remaining diagnostics are C2275/C2065 at object.c(1196) for late PyObject *descr, followed by C2275/C2146/C2065 at line 1197 for descrgetfunc f; later diagnostics remain separate. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791107440-4071333-a520.log.
CPython baseline tag/commit checked before editing; no compatibility patch regeneration. No commit or push.

Files changed this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: re-probe before editing, then test-first handle only the first late-local family at object.c(1196); separate the descrgetfunc f declaration and subsequent issues.

Latest revision (_PyObject_GetDictPtr C89 locals hoisted; object.c frontier advances)

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyObject_GetDictPtr frontier remained current on a forced-fresh VC6/Wine probe. One focused Codex CLI lane (0.153.4, workspace-write) extended the existing untracked scripts/vc6-object-richcompare-c89.test.py; the new check failed RED as expected before production changes. Hoisted only PyObject **dict_ptr, PyDictValues **values_ptr, and PyObject *dict to the function-entry declarations in cpython/Objects/object.c; assignments remain at their original points. The managed-dict branch, pointer initialization and NULL path, conversion/error-clear behavior, and values/dict store order are unchanged. No neighboring functions were modified in this slice.

Exact verification:

Forced-fresh pre-change probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics were C2275/C2065 at object.c(1124-1125) for late dict_ptr and values_ptr, followed by dependent errors. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791099148-4038166-9d0.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected missing function-entry declarations; preceding richcompare/exception/attribute checks passed.
GREEN: same focused command — exit 0; all checks passed, including the new exact _PyObject_GetDictPtr statement-order assertion. scripts/vc6-object-c89.test.py and scripts/vc6-object-functionstr-c89.test.py also passed before the slice; the agent ran the focused richcompare script after the change.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new object assertion and core object checks pass. Existing unrelated failures remain: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found). No unrelated fixes attempted.
Forced-fresh post-change probe (same command) — exit 2; total=100 compiled=99 cached=0 skipped=0. Prior diagnostics at object.c(1124-1125) are gone; _PyObject_GetDictPtr now compiles through. The next first blocker is C2143 at object.c(1183) before type in a separate function, followed by dependent errors there. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791099505-4038166-22c0.log.
git diff --check -- scripts/vc6-object-richcompare-c89.test.py and git -C cpython diff --check -- Objects/object.c — exit 0. Baseline tag/commit verified unchanged. No compatibility patch regeneration.

Files changed by this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry; prior local changes remain. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: re-probe before further edits, then test-first inspect only the C2143 declaration at object.c(1183); keep subsequent diagnostics separate.

Previous revision (_PyObject_DictPointer size declaration hoisted; object.c frontier advances)

Date: 2026-10-04 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all prior work; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Re-probed the recorded object.c frontier with forced-fresh VC6/Wine source-list compile. _blake2/blake2s_impl.c compiled. First error family remained late size_t size in _PyObject_DictPointer() at line 1100. One focused Codex CLI lane (0.153.4, workspace-write) extended scripts/vc6-object-c89.test.py, observed expected RED, then hoisted only size_t size; to the start of the existing negative-offset block and changed the original declaration/initializer to size = _PyObject_VAR_SIZE(tp, tsize);. Expression, assertion, offset adjustment, and return order are preserved. No adjacent source errors were changed.

Exact verification:

Forced-fresh pre-change probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. First diagnostics C2275/C2146/C2065 at object.c(1100) for late size_t size. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791091193-4004215-b950.log.
TDD RED: python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c — exit 1, expected _PyObject_DictPointer declaration/order assertion; the preceding three object checks passed.
GREEN: same command — exit 0; all four object checks passed. python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c and python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 0.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/vc6-dictpointer-frontier-test.log 2>&1 — exit 1. The new assertion and object checks pass. Existing unrelated failures remain: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found). Full log: /tmp/vc6-dictpointer-frontier-test.log.
Forced-fresh post-change probe (same command) — exit 2; total=100 compiled=99 cached=0 skipped=0. Former diagnostics at line 1100 are gone. First blocker advances to C2275/C2065 at line 1124 (PyObject *dict_ptr) in _PyObject_GetDictPtr; following diagnostics are separate. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791091612-4004215-640.log.
git diff --check and git -C cpython diff --check — exit 0. The source diff is limited to the one intended declaration/assignment conversion; CPython baseline unchanged.

Files changed by this slice: cpython/Objects/object.c, scripts/vc6-object-c89.test.py, and this status entry. Compile-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 execution. Next frontier: test-first address only the late declarations at object.c(1124) in _PyObject_GetDictPtr; treat later diagnostics separately.

Previous latest revision (PyObject_GetAttr result declaration hoisted; object.c frontier advances)

Date: 2026-10-04 03:18 UTC

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 reference before acting. Preserved all existing outer and nested changes; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. Verified CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded object.c frontier was freshly confirmed with a forced VC6/Wine source-list probe. _blake2/blake2s_impl.c compiled, and PyObject_GetAttr() at Objects/object.c(935) was the first blocker. One focused coding CLI lane (Codex CLI 0.153.4, workspace-write) performed a TDD slice: extended the pre-existing untracked scripts/vc6-object-richcompare-c89.test.py, observed RED, then hoisted only PyObject *result to the function declarations and changed its former late initialized declaration to result = NULL; after name validation. Dispatch, validation, error-context, and return order are unchanged. No other production source was modified in this slice.

Exact verification:

Forced-fresh pre-change probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. First errors: C2275/C2065 at object.c(935) for late PyObject *result; subsequent stable blocker was size_t size at line 1099. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791083254-3970565-ed70.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1; prior richcompare and set_attribute_error_context checks passed, new assertion failed because result was not declared at function entry.
GREEN plus focused object regressions: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 0; all richcompare, error-context, PyObject_GetAttr, object C89, and FunctionStr assertions passed.
Applicable harness: MSVC600_ROOT=/dev/null bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Live compiler integration intentionally skipped. The new object checks passed; two known unrelated checks still fail: console type lookup/cleanup order, and numeric dispatch (ValueError: substring not found). No harness-wide pass claimed.
Forced-fresh post-change probe (same command as pre-change) — exit 2; total=100 compiled=99 cached=0 skipped=0. Former errors at object.c(935) are gone. First stable diagnostic is now C2275/C2146/C2065 at object.c(1100) for late size_t size; later object.c diagnostics are separate. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791083629-3970565-5220.log.
git diff --check and git -C cpython diff --check — exit 0. Baseline tag and commit verified unchanged.

Files changed by this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry. Compiler-probe progress only; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first inspect and address only the late size_t size declaration in the function at object.c(1100), preserving original evaluation/order; re-probe before treating the frontier as current.

Previous latest revision (set_attribute_error_context C89 locals hoisted; object.c frontier advances)

Date: 2026-10-04 01:06 UTC

Forced-fresh MSVC600/Wine probe reconfirmed the recorded frontier: _blake2/blake2s_impl.c compiled, and the first blocker was Objects/object.c(900) in set_attribute_error_context(). Used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write) for this narrow TDD slice. Extended the pre-existing untracked scripts/vc6-object-richcompare-c89.test.py without removing its rich-compare check. Hoisted only type, value, traceback, and PyAttributeErrorObject *the_exc to the function entry; changed the late the_exc initialized declaration to assignment at its original point. Exception check/fetch/normalize/restore, augmentation, and early returns remain in original order. No other new production source change was made in this slice.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. First stable diagnostics: C2275 and C2065 at object.c(900) for the late PyObject *type, *value, *traceback; C2275/C2065 at line 907 for late PyAttributeErrorObject *the_exc. _blake2/blake2s_impl.c compiled. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791075267-3936276-180.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1 before production edit; existing PyObject_RichCompare assertion passed, new assertion failed because the four locals were not at function entry.
GREEN/focused regressions: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c && python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c — exit 0; richcompare and set_attribute_error_context checks passed, as did three existing object C89 checks.
Applicable harness: MSVC600_ROOT=/dev/null bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Live integration explicitly skipped; two known unrelated checks still fail: console type lookup/cleanup order, and numeric dispatch (ValueError: substring not found). All other emitted checks passed; no harness-wide pass claimed.
Post-change forced-fresh probe (same command as initial probe) — exit 2; total=100 compiled=99 cached=0 skipped=0. Prior errors at set_attribute_error_context() are gone. First stable diagnostic is now object.c(935) C2275/C2065 for late PyObject *result in PyObject_GetAttr; subsequent object.c diagnostics remain separate. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791075688-3936276-a060.log.
git -C cpython diff --check -- Objects/object.c and git diff --check -- scripts/vc6-object-richcompare-c89.test.py — exit 0. Baseline tag and commit verified unchanged.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-richcompare-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first address only PyObject_GetAttr()'s late result declaration at line 935, preserving dispatch and error order; keep later object.c errors separate.

Latest revision (PyObject_RichCompare C89 local hoisted; object.c frontier advances)

Date: 2026-10-03 22:52 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. CPython remains at detached tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Preserved all existing outer/nested changes; no reset, clean, stash, discard, commit, push, compatibility patch regeneration, or publication.

The prior PyObject_RichCompare line-747 frontier was freshly reconfirmed by a forced-fresh source-list compile. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write) added a narrow regression and applied one C89 change: declared PyObject *res with the function-entry locals and changed the original late initialized declaration to res = do_richcompare(...). Validation, recursive-call entry, leave, and return order are preserved. Independent review confirmed this function-only source diff; no other production source was changed in this slice.

Exact verification:

Forced-fresh VC6 probe before implementation: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled; object.c(747) first errors C2275 (PyObject illegal use as expression) and C2065 (res undeclared). Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791067258-3892466-4770.log.
TDD RED: python3 scripts/vc6-object-richcompare-c89.test.py cpython/Objects/object.c — exit 1, expected assertion that res must be declared once without initializer at entry.
GREEN and independent focused rerun: same command — exit 0, object PyObject_RichCompare C89 res declaration and recursive-call/result order: PASS.
Applicable suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The test set ran; this slice's source check passed. Two known unrelated failures persist: console type lookup/cleanup ordering and numeric dispatch (ValueError: substring not found).
Forced-fresh post-change probe (same command) — exit 2; total=100 compiled=99 cached=0 skipped=0. Former line-747 errors are gone. First stable errors now occur at object.c(900) C2275/C2065 for late exception-object declarations in a different function; later object.c C89/initializer diagnostics remain distinct. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791067716-3892466-4fc0.log.
Scoped git -C cpython diff --check -- Objects/object.c and git diff --check -- scripts/vc6-object-richcompare-c89.test.py — exit 0. CPython remains at the exact baseline tag/commit above.

Files changed by this slice: cpython/Objects/object.c, new scripts/vc6-object-richcompare-c89.test.py, and this log. Compile-frontier progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first inspect and address only the late declarations at object.c(900); keep subsequent diagnostics separate.

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. CPython remains at detached tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Preserved all existing outer and nested changes; no reset, clean, stash, discard, commit, push, patch regeneration, or publication.

The _blake2/blake2s_impl.c recorded frontier remained stale as expected: forced-fresh VC6 probe compiled it and reached Objects/object.c. Addressed exactly the first error family in _PyObject_FunctionStr: removed the duplicate late PyObject *module; and changed the duplicate late PyObject *result = NULL; into result = NULL;. This keeps the original initialization point/order and uses the function-entry declarations. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write) followed TDD; native delegation was unavailable because the Anthropic package is absent. Independently reviewed its narrow diff.

Exact results:

Forced-fresh pre-change probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0; first stable errors C2275 at object.c(620-621) for the duplicate module and result declarations. _blake2/blake2s_impl.c compiled.
TDD RED: python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 1, expected 2 module declarations found.
GREEN: same test — exit 0, unique declarations and evaluation/statement order pass. Existing python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c — exit 0 (three existing checks pass).
Applicable suite: MSVC600_ROOT=/tmp/python-win9x-no-toolchain bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; the active object checks passed; two known unrelated failures remain: console type lookup/cleanup ordering and numeric dispatch (ValueError: substring not found). Live compiler integration intentionally skipped in this suite invocation.
Focused VC6 compile of Objects/object.c using the generated response-file include/define configuration — exit 2. Former diagnostics at lines 620-621 are gone. First remaining errors are C2275/C2065 at line 747 in a separate function, followed by distinct later C89 errors. This confirms progress at the compiler frontier; it does not clear the translation unit.

Files changed this run: cpython/Objects/object.c, new scripts/vc6-object-functionstr-c89.test.py, and PORT_STATUS.md. No compatibility patch regeneration. Compile-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first address only the line-747 C89 declaration in object.c, after confirming exact function context; retain later diagnostics as separate blockers.

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 reference before acting. CPython remains at tag v3.11.16, detached baseline commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Preserved all pre-existing outer and nested work; no reset, clean, stash, discard, commit, push, patch regeneration, or publication.

The previously mentioned _blake2/blake2s_impl.c frontier was stale. Forced-fresh MSVC600 source-list probe reached 99/100 translation units and compiled _blake2/blake2s_impl.c; the actual first blocker is cpython/Objects/object.c. First stable errors are C2275 for duplicate late PyObject *module and PyObject *result = NULL at lines 620–621 in _PyObject_FunctionStr; both names are already declared at function entry (lines 608–610). Later diagnostics in object.c are distinct and were not addressed.

Focused implementation was not retained because Wine failed before invoking cl.exe. A test-first candidate reproduced the duplicate declaration (RED, expected assertion), and the minimal source edit passed that focused test and the existing object regression, but the actual compiler confirmation could not be obtained. Wine startup failed with sock_init: ERROR in sock_check_pollhup() and wineserver: mkdir /run/user/1000/wine/server-21-59c6: Read-only file system; retry with a temporary prefix/runtime directory failed identically. The temporary production edit was reverted byte-for-byte. The candidate test was removed rather than leaving an intentionally failing test artifact.

Exact verification:

Forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0; first blocker Objects/object.c, C2275 at lines 620–621. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791051825-3857953-f590.log.
TDD candidate regression RED: python3 scripts/vc6-object-functionstr-c89.test.py cpython/Objects/object.c — exit 1, expected module must be declared exactly once.
Candidate GREEN (while the temporary fix was present): same command — exit 0. Existing python3 scripts/vc6-object-c89.test.py cpython/Objects/object.c — exit 0.
Focused VC6 compile using build/vc6-probe-pythoncore-frontier/Objects_object.rsp — exit 1 before compiler startup due to read-only /run/user/1000/wine; no compiler diagnostic beyond the full source-list probe was obtained.
After reverting the candidate: object.c matches its entry snapshot; all 122 snapshotted pre-existing files, including PORT_STATUS.md, were verified unchanged before this log update. Nested scoped git diff --check -- Objects/object.c passed.

Files changed for this run: PORT_STATUS.md only. No production compatibility change is retained. This remains compile-frontier evidence only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 SE execution. Next step: restore a Wine server runtime directory that is writable to the wineserver process, then repeat the forced-fresh frontier and address only the first current object.c diagnostic with RED/GREEN plus a successful focused VC6 compile.

Previous latest revision (generated compatibility patch refreshed; VC6 frontier in object.c)

CPython baseline: v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The incremental C89/VC6 port now compiles memoryobject.c, methodobject.c, and moduleobject.c directly with VC6. Focused checks cover their declaration, evaluation, allocation, reference, and type-initialization ordering. Additional C89 conversions and focused checks have been added for object.c; its direct VC6 compile still fails with 72 diagnostics, many likely cascading from late declarations and remaining C99 constructs. This is compile-only progress; no interpreter link or Windows 98 SE runtime test is verified.

The tracked compatibility patch compat/msvc600/cpython-3.11.16-vc6-headers.patch has been regenerated from the full nested CPython working-tree diff and the untracked Include/internal/pycore_win9x_loadlibrary.h. A byte-for-byte check confirmed the patch contains all 121 modified/new file diffs. The nested CPython checkout remains detached; its source changes are represented in the root repository by this patch, not by committing the nested checkout.

Next: finish object.c, rerun the forced source-list compile frontier and focused regressions, then tackle linking and real Windows 98 SE execution separately. No link/runtime success is claimed.

Latest revision (`PyLong_FromUnsignedLongLong` uses VC6-compatible unsigned type spelling)

Date: 2026-10-03 14:15 UTC

Read PORT_STATUS.md, README.md, and the invoked legacy-toolchain guidance before work. The on-disk python-3-win9x-msvc6.md reference was absent. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549 (the same hash as recorded previously). The prior recorded _PyLong_FromLarge() frontier was stale. Forced-fresh MSVC600 cl.exe via Wine re-probe confirmed the actual first blocker was C2632 at Objects/longobject.c(374) and (376): unsigned long long is rejected by VC6 in the PyLong_FromUnsignedLongLong definition and PYLONG_FROM_UINT instantiation. The compiler probe output did not print a separate compiler version banner.

Used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write) for one narrow TDD slice. Extended scripts/vc6-longobject-c89.test.py, observed RED against the original spelling, then changed only the function parameter and macro type argument to unsigned PY_LONG_LONG. This matches the public declaration in Include/longobject.h and the existing VC6 mapping to __int64 in PC/pyconfig.h, preserving unsigned 64-bit intent. No other source declaration or behavior changed. The existing later C89 errors were left untouched.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0; first errors C2632 at longobject.c(374) and (376), followed by line-407 C89 errors. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791036400-3732714-7090.log.
RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1, expected assertion that PyLong_FromUnsignedLongLong must use the public/VC6-compatible unsigned PY_LONG_LONG spelling.
GREEN: same focused test — exit 0; all six longobject assertions passed.
Applicable regression suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The longobject checks and other applicable checks passed; two known unrelated failures remain: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found). Log: /tmp/vc6-longlong-slice/suite.log.
Post-change forced-fresh probe (same command) — exit 2, total=95 compiled=94 cached=0 skipped=0. The C2632 errors at lines 374/376 are gone; first stable errors now occur at line 407 in PyLong_FromDouble() (C2275/C2065 on late PyLongObject *v, followed by C89 declaration errors). Later independent long-long/CRT diagnostics remain. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791036840-3732714-b110.log.
git -C cpython diff --check -- Objects/longobject.c and git diff --check -- scripts/vc6-longobject-c89.test.py — exit 0. Preservation comparison confirmed only this source and focused test changed beyond the pre-run snapshot; PORT_STATUS.md, compatibility patch, and all unrelated local changes were preserved.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 SE execution. Next frontier: test-first address only the first late-local declaration family in PyLong_FromDouble() at line 407, preserving all fast-path and validation/evaluation order; keep subsequent long-long/CRT issues separate.

Previous revision (`_PyLong_FromLarge` C89 locals hoisted; frontier advances within longobject)

Date: 2026-10-03 09:47 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain guidance first. The referenced on-disk python-3-win9x-msvc6.md file was not found in the active profile or repository; the invoked skill guidance was available. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyLong_FromLarge() frontier remained current on forced-fresh probe. Used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write) for one narrow TDD slice. Extended scripts/vc6-longobject-c89.test.py, observed RED before the source edit, then hoisted only twodigits abs_ival, twodigits t, Py_ssize_t ndigits, PyLongObject *v, digit *p, and int sign to _PyLong_FromLarge()'s entry declarations in cpython/Objects/longobject.c. Initializers became assignments at their original execution points. Assertions, sign/absolute-value branches, digit-count loop, allocation, initialization, digit-write loop, and return ordering remain unchanged. Independently inspected the nested diff and confirmed only this function changed in the nested CPython slice.

Exact verification:

Initial forced-fresh compiler probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First errors were C2275/C2146/C2065 on late twodigits t at longobject.c(239), followed by late ndigits at 240 and v at 245. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791020452-3685379-2910.log.
RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1 at the new _PyLong_FromLarge assertion; the prior get_small_int, _PyLong_New, and _PyLong_FromMedium checks passed.
GREEN: same focused command — exit 0; all four longobject regression checks passed.
Applicable broad regression: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Longobject checks and the rest of applicable checks run and pass. Two known unrelated failures remain: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found).
Post-change forced-fresh probe (same command) — exit 2, total=95 compiled=94 cached=0 skipped=0. longobject.c now compiles past _PyLong_FromLarge; first errors advanced to line 364 in PyLong_FromLong() (C2275/C2146/C2065 on a late Py_ssize_t ndigits, then cascading late t, v, and p declarations). Subsequent diagnostics include independent long-long/CRT blockers. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791020810-3685379-5b50.log.
git -C cpython diff --check -- Objects/longobject.c and git diff --check -- PORT_STATUS.md scripts/vc6-longobject-c89.test.py — exit 0.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 SE execution. Next frontier: test-first address only the first PyLong_FromLong() declaration family at line 364, retaining its small/medium fast paths and digit-count/allocation order; handle later long long and CRT issues separately.

Previous revision (`_PyLong_FromMedium` C89 locals hoisted; frontier advances within longobject)

Date: 2026-10-03 07:39 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain reference before acting. Preserved the existing outer worktree and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The prior _PyLong_New() frontier was freshly rechecked: _blake2/blake2s_impl.c compiled, _PyLong_New()'s line-156 diagnostic was gone, and the first blocker was _PyLong_FromMedium() at line 205.

Used one focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write). Strict TDD: extended scripts/vc6-longobject-c89.test.py for _PyLong_FromMedium() declarations and statement order, observed RED before the production edit, then hoisted only PyLongObject *v, Py_ssize_t sign, and digit abs_x to the opening declaration group in cpython/Objects/longobject.c. Assignments remain at their original points; assertions, allocation, NULL/error/return, initialization, digit write, and return order are preserved. The agent made no other changes; independently inspected the narrow diff.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First blocker was C2143 at longobject.c(205) on the late PyLongObject *v; dependent errors included C2065 v and late Py_ssize_t sign / digit abs_x. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791012585-3658734-75d0.log.
RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1, expected assertion that _PyLong_FromMedium declarations and order did not match; prior get_small_int and _PyLong_New checks passed.
GREEN: same command — exit 0; all three longobject checks passed, including the new _PyLong_FromMedium check.
Applicable regression suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The broad suite ran; this slice's source behavior assertion passed when run directly. Two known unrelated failures remain: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found).
Post-change forced-fresh probe (same command) — exit 2, total=95 compiled=94 cached=0 skipped=0. _PyLong_FromMedium() passed its former diagnostics. First stable diagnostics now occur in _PyLong_FromLarge() at longobject.c(239) on late twodigits t (C2275/C2146, with C2065 t), followed by late Py_ssize_t ndigits at line 240 and late PyLongObject *v at line 245. Full log: build/current-recheck/longobject-frommedium-post.log.
git diff --check -- PORT_STATUS.md scripts/vc6-longobject-c89.test.py && git -C cpython diff --check -- Objects/longobject.c — exit 0.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 SE execution. Next frontier: test-first hoist only the first _PyLong_FromLarge() declaration family in function-entry order, preserving assertions, sign/absolute-value decisions, digit-count loop, allocation, initialization, and digit-write order; keep later long long/CRT blockers separate.

Previous revision (_PyLong_New ndigits declaration hoisted; frontier remains longobject)

Date: 2026-10-03 05:16 UTC

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 reference before acting. Preserved existing outer and detached CPython edits; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded frontier had become stale: forced-fresh VC6 re-probe confirmed _blake2/blake2s_impl.c compiles and first blocked at Objects/longobject.c(156) inside _PyLong_New().

Applied one narrow test-first C89 slice: hoisted only Py_ssize_t ndigits into _PyLong_New()'s declaration group; its assignment remains after the overflow check and before allocation. The regression scripts/vc6-longobject-c89.test.py now checks the declaration and exact overflow-check, ndigits assignment, allocation, allocation error, initialization, and return order. The native Hermes coding-subagent API could not start because its Anthropic package is absent; used one focused Codex CLI lane (codex-cli 0.153.4, workspace-write) and independently checked results. Existing uncommitted get_small_int() changes were retained.

Exact verification:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0. _blake2/blake2s_impl.c compiled; first blocker was C2275/C2146/C2065 at longobject.c(156) for late Py_ssize_t ndigits. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791004605-3636193-e850.log.
RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1, expected _PyLong_New assertion failed; existing get_small_int check passed.
GREEN: same command — exit 0, both get_small_int and _PyLong_New checks passed.
Post-change forced-fresh probe (same command) — exit 2, total=95 compiled=94 cached=0 skipped=0. The _PyLong_New() line-156 diagnostic is gone. First remaining stable diagnostics start at longobject.c(205) in _PyLong_FromMedium() (C2143 before type and dependent C2065 v); later declaration-order and long long blockers remain separate. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791004999-3636193-ef50.log.
Applicable regression command bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new longobject checks pass when run directly; the full suite still has the two known failures: console type-detection ordering and numeric dispatch (ValueError: substring not found).
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && git diff --check -- PORT_STATUS.md scripts/vc6-longobject-c89.test.py && git -C cpython diff --check -- Objects/longobject.c — exit 0.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and PORT_STATUS.md. Compile-frontier evidence only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or actual Windows 98 SE execution. Next frontier: test-first hoist only the first _PyLong_FromMedium() declaration family at line 205, preserving allocation/error and initialization order; keep subsequent locals and long long issues separate.

Read PORT_STATUS.md, README.md, and the invoked legacy-toolchain guidance before acting. The referenced on-disk python-3-win9x-msvc6.md was not present at either the expected profile skills reference path or in the repository. Preserved every pre-existing outer and detached CPython change; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The status-recorded listobject frontier was stale. A forced-fresh probe confirmed Objects/listobject.c and _blake2/blake2s_impl.c now compile; first blocker is Objects/longobject.c. Applied one narrow C89 slice in get_small_int(): moved only PyObject *v to the function's declaration group and retained the assertion → small-int lookup assignment → incref → return order. Added scripts/vc6-longobject-c89.test.py. Coding subagent dispatch was attempted, but the delegate service failed because the Anthropic Python package is unavailable; proceeded with the minimal test-first edit directly, without a coding CLI.

Exact verification:

RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1 with the expected assertion that get_small_int must declare v at function entry and preserve evaluation order.
GREEN: same command — exit 0, longobject get_small_int C89 declaration and evaluation order: PASS.
Applicable shell regression: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The longobject changes do not introduce suite assertions (no longobject integration existed); the known console-type-detection assertion fails and numeric-dispatch check raises ValueError: substring not found. The listobject and other targeted checks pass.
Initial fresh probe before the slice: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0. First diagnostics in longobject.c: C2143 at line 61 before type, C2065 v; subsequent errors are distinct declaration-order and long long/CRT compatibility issues. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790996934-3608344-9090.log.
Post-change forced fresh probe (same command) — exit 2, total=95 compiled=94 cached=0 skipped=0. get_small_int()'s prior C2143/C2065 diagnostics are gone; first remaining errors are C2275/C2146/C2065 at longobject.c(156) for late Py_ssize_t ndigits in _PyLong_New(). Later declaration-order and VC6 64-bit type issues remain separate. Log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790997084-3608344-5490.log.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh, focused/nested/outer scoped git diff --check — exit 0.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and PORT_STATUS.md. Compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or actual Windows 98 SE execution. Next frontier: test-first hoist only ndigits in _PyLong_New(), preserving the overflow check and allocation/error sequence.

Latest revision (expanded listobject VC6/C89 fixes; forced recheck in progress)

Date: 2026-10-03 03:05 UTC

Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, or push. CPython remains on the v3.11.16 baseline.

The last completed forced-fresh probe had advanced past the earlier list-allocation, list-repeat, and powersort-helper blockers, then reported additional C89 violations in listobject.c sorting, comparison, vectorcall, extended-slice assignment, type initialization, and iterator-pickling code. Applied declaration/order fixes in those paths and replaced the PyList_Type.tp_vectorcall designated initializer with a positional tail matching PyTypeObject field order. Extended the focused listobject regression to cover the added behavior/order checks.

Verification:

Focused regressions pass for listobject, frameobject, funcobject, genericaliasobject (including object.c), genobject, interpreteridobject, and iterobject.
Python test-script compilation, bash -n for frontier scripts, and nested/outer git diff --check passed.
Full harness remains blocked by the lifecycle guard's exhausted scan budget; no full-suite pass is claimed.
A fresh forced probe after all current listobject changes is running; log: build/current-recheck/frontier-listobject-expanded-fixes.log.

Compile-only evidence; no interpreter link or runtime execution. Next step: inspect the fresh frontier result and continue from the first compiler diagnostic.

Previous latest revision (listobject repeat C89 declarations; forced recheck)

Date: 2026-10-03 00:57 UTC

Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _blake2/blake2s_impl.c state was no longer the frontier. Forced-fresh probing found Objects/genericaliasobject.c as the first blocker. Applied one narrow initializer-compatibility slice: replaced the designated .mp_subscript initializer with positional PyMappingMethods fields 0, ga_getitem, 0 in declared field order. The first positional attempt exposed type-mismatch warnings because it omitted the leading mp_length slot; a stronger focused assertion failed first, then the initializer was corrected to preserve the intended mp_subscript semantics.

Exact commands/results:

Initial forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=90 compiled=89 cached=0 skipped=0. First diagnostic was C2059 at genericaliasobject.c(583) for .mp_subscript = ga_getitem.
TDD RED: python3 scripts/vc6-genericaliasobject-c89.test.py cpython/Objects/genericaliasobject.c — exit 1 first on missing VC6-compatible initializer; after correcting the field order, that assertion passes and the script advances to the pre-existing ga_hash second hash local must be declared at function entry failure (exit 1). A direct assertion of the exact 0, ga_getitem, 0 field layout passed (exit 0).
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new initializer assertion and other generic-alias checks run, but existing generic-alias ga_hash second hash local must be declared at function entry remains failing. Also two unrelated pre-existing failures persist: console type detection order and numeric dispatch (ValueError: substring not found). No unrelated changes made.
Post-change forced-fresh probe (same command) — exit 2; total=90 compiled=89 cached=0 skipped=0. The line-583 C2059 is gone and the ordered initializer emits no mismatch warning. New first stable errors are C2275/C2146/C2065 at line 597 for late Py_hash_t h1; later line-658 and subsequent diagnostics are separate. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790989338-3437483-1c50.log.
Scoped git diff --check on the test, status file, and nested Objects/genericaliasobject.c — exit 0.

Files changed by this slice: cpython/Objects/genericaliasobject.c, scripts/vc6-genericaliasobject-c89.test.py, and this status log. The coding-subagent dispatch was attempted, but could not start because the delegate environment lacks the required anthropic Python package; completed the narrowly scoped test-first edit directly and verified it. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is claimed. Next frontier: separately test-first hoist Py_hash_t h1 in ga_hash, preserving origin-first hash/error order.

Previous revision (`tuple_index` loop declaration hoisted; genericaliasobject frontier advances)

Date: 2026-10-02 22:56 UTC

Read PORT_STATUS.md, README.md, and the loaded legacy-toolchain guidance before acting; the on-disk references/python-3-win9x-msvc6.md was not found. Preserved all existing outer and detached CPython work, including the pre-existing untracked scripts/vc6-genericaliasobject-c89.test.py. No reset, clean, stash, discard, commit, push, or publication. CPython remains at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded frameobject frontier was rechecked with a forced-fresh MSVC600 probe: it compiled through Objects/frameobject.c; the active first blocker is Objects/genericaliasobject.c. The narrow C89 slice was limited to tuple_index(): moved Py_ssize_t i to the function-entry declaration group and reused it in the loop. Scan order and return -1 behavior are unchanged. Used exactly one focused Codex CLI coding lane (0.153.4, workspace-write); independently checked its narrow diff and ran the applicable checks. The existing focused test failed before the source edit as expected.

Exact verification:

RED: python3 scripts/vc6-genericaliasobject-c89.test.py cpython/Objects/genericaliasobject.c — exit 1, tuple_index loop variable must be declared at function entry.
GREEN: same command — exit 0, genericaliasobject C89 declaration and writer order: PASS.
Forced fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=90 compiled=89 cached=0 skipped=0. genericaliasobject.c passes the tuple_index() diagnostic. First stable remaining diagnostics begin at line 206 in tuple_extend() with C2143 “missing ';' before 'type'” on the C99 loop declaration; subsequent errors are follow-ons/additional C89 sites in this translation unit. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790981507-3342471-aa90.log.
Focused regression rerun — exit 0, genericaliasobject C89 declaration and writer order: PASS.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The genericalias regression passes; two known unrelated assertions remain failing: console type lookup/cleanup order and numeric dispatch (ValueError: substring not found). No unrelated fixes attempted.
Scoped git diff --check for cpython/Objects/genericaliasobject.c, the focused test and PORT_STATUS.md — exit 0.

Files changed by this slice: cpython/Objects/genericaliasobject.c and this status log. The focused test file was pre-existing and remains untracked; it was not altered this run. The generated compatibility patch was not regenerated. This is compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: inspect and test-first address only the first tuple_extend() loop declaration diagnostic at line 206.

Previous latest revision (`frame_setlineno` C89 declarations hoisted; frameobject frontier advances)

Date: 2026-10-02 20:33 UTC

Read PORT_STATUS.md, README.md, and the loaded legacy-toolchain porting guidance before editing. The on-disk references/python-3-win9x-msvc6.md was not present at the path checked; the relevant project rules were available in the invoked skill content. Preserved all pre-existing outer and detached CPython work. No reset, clean, stash, discard, commit, push, or publication. CPython remains at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

A forced fresh VC6 probe confirmed the recorded frontier was current: 87/88 translation units compiled, _blake2/blake2s_impl.c compiled, and Objects/frameobject.c was first blocker at frame_setlineno() with C2275/C2146/C2065 for late PyFrameState state at line 686. Used one focused Codex CLI coding lane after confirming codex-cli 0.153.4 was available. Following strict TDD, it extended scripts/vc6-frameobject-c89.test.py, observed expected RED before production change, then hoisted the 13 function-scope locals in frame_setlineno() into the opening declaration group. Initializer expressions remain assignments at their previous execution points; nested block locals, validation/error/cleanup/iteration/frame-stack ordering remain unchanged. Independently verified the diff and reran checks.

Exact commands/results:

Initial forced probe XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, 87/88 compiled, zero cached. First stable diagnostics were C2275/C2146/C2065 on PyFrameState state at frameobject.c(686); subsequent errors in that function were follow-ons. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790973232-3123322-1550.log.
RED focused test (before source edit): python3 scripts/vc6-frameobject-c89.test.py cpython/Objects/frameobject.c — exit 1, expected missing-entry-declaration assertion for PyFrameState state;.
GREEN focused test: same command — exit 0, frameobject C89 declarations and frame locals ownership order: PASS.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh and scoped nested/outer git diff --check — exit 0.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new frameobject regression passes; 250 checks pass overall. Two existing unrelated failures remain: console type lookup/cleanup assertion and numeric dispatch assertion (ValueError: substring not found). No unrelated fixes attempted.
Forced post-change probe, after preparing writable workspace runtime directory: mkdir -p build/current-recheck/runtime && chmod 700 build/current-recheck/runtime && XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, 87/88 compiled, zero cached. frame_setlineno() now compiles past its prior diagnostics. First stable remaining diagnostic is C2143 at frameobject.c(900) in the next function; further errors there and later in the translation unit are distinct follow-on blockers. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790973669-3123322-2e50.log.

Files changed by this slice: cpython/Objects/frameobject.c, scripts/vc6-frameobject-c89.test.py, and this log. Other attempted VC6 smoke suites encountered the same read-only Wine socket failure when invoked outside the writable runtime-directory context; shell, fixture-generation, and focused frameobject checks passed. This is compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Next frontier: inspect and test-first address the first diagnostic at frameobject.c(900), without bundling later errors.

Previous latest revision (frameobject C89 work; frontier advances past floatobject)

Date: 2026-10-02 19:09 UTC

The CPython checkout remains at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Preserved the existing outer and detached CPython working trees; no reset, clean, stash, or discard. Regenerated compat/msvc600/cpython-3.11.16-vc6-headers.patch from the complete nested CPython diff and verified byte-for-byte. The outer Gitea commit will contain that patch, focused tests, and this status log; the nested checkout remains detached/uncommitted.

Continued the C89 port after a fresh forced VC6 probe found Objects/exceptions.c at 84/85. Exception-group and exception metadata declarations were hoisted in earlier edits; subsequent forced probes compiled past exceptions, fileobject, and floatobject. In this continuation:

Objects/fileobject.c: hoisted Py_OpenCodeHookFunction hook in PyFile_OpenCodeObject() while leaving lookup after path validation.
Objects/clinic/floatobject.c.h and Objects/floatobject.c: moved the typestr_length declaration; corrected C89 declarations in float packing, exact deallocation, PyFloat_AsDouble, vectorcall, and format detection; replaced the designated PyFloat_Type.tp_vectorcall initializer with positional trailing slots; replaced 1ULL-style concern in frame stack threshold via PY_ULL(1).
Objects/frameobject.c: corrected frame_getlocals, stack-swap helpers, overflow literal, stack analysis (mark_stacks), incompatible-stack lookup, line marking, and loop-local declarations. Execution/ownership order was retained in the focused checked paths.

Focused regressions pass:

python3 scripts/vc6-fileobject-opencode-c89.test.py cpython/Objects/fileobject.c
python3 scripts/vc6-floatobject-pack4-c89.test.py cpython/Objects/floatobject.c cpython/Objects/clinic/floatobject.c.h
python3 scripts/vc6-frameobject-c89.test.py cpython/Objects/frameobject.c
git -C cpython diff --check

The latest forced probe compiled 87/88 translation units and moved the first blocker to Objects/frameobject.c. First diagnostics are C2275/C2146/C2065 for late PyFrameState state in frame_setlineno() at line 686; further diagnostics in that function and later frameobject code are follow-on C89 issues. Full log: build/current-recheck/frontier-frame-current.log. Next step is test-first declaration hoisting in frame_setlineno(), preserving validation/cleanup order, then re-probe.

This is compile-frontier evidence only. No interpreter has been linked or runtime-tested under Wine or Windows 98 SE. No commit or push has yet been made for this continuation.

Previous revision (fresh frontier recheck; floatobject declarations already fixed)

Date: 2026-10-02 16:22 UTC

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 reference before work. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Re-probed because the status named codeobject.c while the older _blake2/blake2s_impl.c frontier instruction was stale. The forced fresh probe confirmed dictobject.c as the actual first blocker.

One narrow TDD C89 slice in cpython/Objects/dictobject.c: moved only j, pos, and key declarations in dict_keys() to the opening declaration group, with j = 0 and pos = 0 remaining after the successful allocation/retry guard. Iteration, refcounting, and return order are unchanged. Extended the pre-existing untracked focused regression scripts/vc6-dict-consistency-c89.test.py to assert declaration location and the exact following sequence. Used exactly one focused Codex coding-agent lane; independently inspected its diff. No code outside dict_keys() changed in this slice; the other existing nested/outer changes remain untouched.

Exact verification:

RED: python3 scripts/vc6-dict-consistency-c89.test.py cpython/Objects/stringlib/eq.h cpython/Objects/dictobject.c — exit 1 before the production edit, expected dict_keys locals must be declared at function entry without initializers.
GREEN and independent rerun: same command — exit 0, dict consistency C89 declarations and logic order: PASS.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. New dict regression passed; existing console type-detection-order check failed (console type lookup and cleanup order must remain unchanged) and existing numeric-dispatch check raised ValueError: substring not found. No unrelated fix attempted.
Forced fresh compiler probe XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=83 compiled=82 cached=0 skipped=0. _blake2/blake2s_impl.c and dict_keys() compile past the prior frontier. First stable errors are in dict_values() at dictobject.c(2700–2701): C2275/C2146/C2065 for late Py_ssize_t j, pos and C2275/C2065 for late PyObject *value; later dictobject diagnostics are distinct follow-on blockers and untouched. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790958052-2772156-1810.log.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh, focused and scoped git diff --check — exit 0.

Files changed by this slice: cpython/Objects/dictobject.c, scripts/vc6-dict-consistency-c89.test.py, and this log. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. The existing compatibility patch was not regenerated. Next frontier: test-first hoist only the late locals in dict_values(), preserving the successful-allocation/retry boundary and iteration/refcount order.

Previous latest revision (`PyCode_Addr2Location` C89 declaration hoisted; frontier advances in codeobject.c)

Date: 2026-10-02 12:01 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before work. Preserved all pre-existing outer and detached CPython edits; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Confirmed Codex CLI 0.153.4 was available and used exactly one focused coding-agent lane with workspace-write sandbox.

The recorded advance_with_locations_no_columns() frontier was confirmed by a forced fresh VC6 probe. Applied one narrow C89 declaration-order slice in Objects/codeobject.c: moved only PyCodeAddressRange bounds in PyCode_Addr2Location() to the function entry declaration group. _PyCode_InitAddressRange() remains at its original execution point after the address assertion; negative-address fast return and all lookup/retreat/advance order are unchanged. Extended scripts/vc6-codeobject-c89.test.py with a focused declaration and full execution-order assertion. The compatibility patch was regenerated from the complete nested diff and verified byte-for-byte.

Exact verification:

RED: python3 scripts/vc6-codeobject-c89.test.py cpython/Objects/codeobject.c — exit 1, expected PyCode_Addr2Location bounds must be declared before execution.
GREEN and independent focused rerun: same command — exit 0, codeobject C89 declarations and ownership order: PASS.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new codeobject check and most suite checks pass; two known unrelated failures remain: console type detection ordering, and numeric-dispatch assertion (ValueError: substring not found). No unrelated fix was attempted.
Forced fresh VC6 probe XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=80 compiled=79 cached=0 skipped=0. codeobject.c passes the previous line-1028 PyCodeAddressRange bounds diagnostic. The next first stable diagnostics are C2143 at line 1071 before const, then dependent C2065 ptr undeclared at 1073 and C2143/C2065 on code at 1075–1076 in previous_code_delta(); later diagnostics are distinct and untouched. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790942268-2495375-b650.log.
git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch — exit 0. Nested and outer scoped git diff --check — exit 0.

Files changed by this slice: cpython/Objects/codeobject.c, scripts/vc6-codeobject-c89.test.py, regenerated compat/msvc600/cpython-3.11.16-vc6-headers.patch, and this status log. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first hoist only the previous_code_delta() local(s) responsible for the first fresh diagnostic, preserving its first-entry return and backward scan order.

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference. Preserved all pre-existing outer and detached CPython edits; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Confirmed Codex CLI 0.153.4 was available and used exactly one focused coding-agent lane, without bypassing its sandbox.

A forced fresh VC6 probe reconfirmed _blake2/blake2s_impl.c compiles and the active first blocker is Objects/codeobject.c(964–968) in advance_with_locations(). Applied one C89 declaration-order slice: moved only int first_byte and int code to the function's opening declaration group; both assignments remain immediately after ASSERT_VALID_BOUNDS(bounds), preserving byte-read/decode/range-update/dispatch order. Added a focused ordering assertion to the existing untracked codeobject regression test and observed RED before the production edit.

Exact verification:

RED: python3 scripts/vc6-codeobject-c89.test.py cpython/Objects/codeobject.c — exit 1, expected advance_with_locations entry declaration missing or late: int first_byte;.
GREEN: same command — exit 0, codeobject C89 declarations and ownership order: PASS.
Independent baseline/hash check — passed: exactly the requested cpython/Objects/codeobject.c and scripts/vc6-codeobject-c89.test.py changed in the implementation slice; existing checks and all other pre-existing edits preserved. Scoped nested/outer git diff --check — exit 0.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The full script's codeobject and new assertions pass; two existing unrelated checks remain failing: console type detection order, and numeric dispatch (ValueError: substring not found).
Forced fresh VC6 command XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=80 compiled=79 cached=0 skipped=0. codeobject.c now compiles past the advance_with_locations() C2143/C2065 diagnostics. Next first stable diagnostics are C2275/C2146/C2065 at line 1028 for late PyCodeAddressRange bounds in advance_with_locations_no_columns; subsequent diagnostics are separate. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790934445-2409488-98d0.log.
Regenerated compat/msvc600/cpython-3.11.16-vc6-headers.patch from the complete nested diff; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch — exit 0. Scoped diff checks — exit 0.

Files changed by this slice: cpython/Objects/codeobject.c, scripts/vc6-codeobject-c89.test.py, regenerated compatibility patch, and this status log. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first hoist only the declaration responsible for the first fresh advance_with_locations_no_columns() diagnostic around line 1028; preserve statement order and leave later diagnostics separate.

Previous latest revision (`_PyCode_InitAddressRange` locals hoisted; frontier advances in codeobject.c)

Date: 2026-10-02 05:29 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference first. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The stale _blake2/blake2s_impl.c frontier is cleared; a forced fresh probe confirmed the active frontier remained in Objects/codeobject.c.

One narrow test-first C89 slice in _PyCode_InitAddressRange: hoisted only const char *linetable and Py_ssize_t length into the opening declaration group, preserving their assignment points and assertion → byte-string access → length query → range initialization order. Extended the existing untracked focused regression script. Used one focused Codex coding-agent lane (codex-cli 0.153.4); the CLI was available and ran under workspace-write, with no approval override. Its diff was independently inspected.

Exact verification:

RED: python3 scripts/vc6-codeobject-c89.test.py cpython/Objects/codeobject.c — exit 1, expected _PyCode_InitAddressRange entry declaration missing or late: const char *linetable;.
GREEN: same command — exit 0, codeobject C89 declarations and ownership order: PASS.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.
Focused regression suite bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The codeobject check passes; two unrelated existing checks still fail: console type detection preserves control/cleanup order with C89 locals and numeric dispatch helpers preserve slot order with C89 locals (the latter's embedded check raises ValueError: substring not found). No changes made to those tests or source areas.
Forced fresh compiler probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=80 compiled=79 cached=0 skipped=0. codeobject.c now compiles past the prior _PyCode_InitAddressRange diagnostics at lines 825–826. Next first stable blocker: previous_code_delta() at codeobject.c(880), C2143 before const, with dependent C2065 ptr undeclared and illegal-indirection errors at lines 881/884. Later declaration-order blockers remain untouched. Full probe log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790918777-2246167-bd0.log.
git -C cpython diff --check -- Objects/codeobject.c and git diff --check -- scripts/vc6-codeobject-c89.test.py — exit 0.

Files changed in this slice: cpython/Objects/codeobject.c, scripts/vc6-codeobject-c89.test.py, and this log. The compatibility patch was not regenerated or synchronized. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next slice: test-first hoist only previous_code_delta()'s late ptr declaration, preserving the first-entry return before pointer calculation and scan order.

Previous latest revision (`PyCode_Addr2Line` bounds declaration hoisted; frontier advances in codeobject.c)

Date: 2026-10-02 03:10 UTC

Preserved all pre-existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Re-probed rather than assuming the previous _PyVectorcall_Call frontier: _blake2/blake2s_impl.c and Objects/call.c compile; the actual first blocker was the C89 declaration of PyCodeAddressRange bounds in PyCode_Addr2Line at Objects/codeobject.c around line 804 (not _PyLineTable_NextAddressRange).

One narrow C89 slice: moved only the PyCodeAddressRange bounds declaration to the opening declaration group of PyCode_Addr2Line; _PyCode_InitAddressRange() remains at its original execution point after the negative-address and line-array fast paths. Added a focused declaration/order assertion to the existing untracked regression script scripts/vc6-codeobject-c89.test.py, retaining all earlier checks. The first test run against the existing source passed its previous checks; after adding the new assertion it failed as expected with PyCode_Addr2Line bounds must be declared before execution (exit 1), then passed after the source edit.

Exact verification:

Initial forced fresh probe: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=80 compiled=79 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/call.c compiled. First blocker was codeobject.c(804) C2275/C2146/C2065 on PyCodeAddressRange bounds; follow-on errors were C89 declarations in this translation unit.
RED focused test: python3 scripts/vc6-codeobject-c89.test.py cpython/Objects/codeobject.c — exit 1 with the expected assertion above.
GREEN/focused check: same command — exit 0, codeobject C89 declarations and ownership order: PASS.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Shell syntax and most regression checks passed, including the new codeobject test. Two unrelated existing failures remain: console type detection preserves control/cleanup order with C89 locals, and the numeric-dispatch check raises ValueError: substring not found.
Forced fresh post-change probe (same command) — exit 2, total=80 compiled=79 cached=0 skipped=0. codeobject.c now compiles past the PyCode_Addr2Line bounds diagnostic. The next first diagnostics are at lines 825–826: C2143/C2275/C2065 for late const char *linetable and Py_ssize_t length in _PyCode_InitAddressRange; later independent declaration-order blockers in codeobject.c remain untouched.
git -C cpython diff --check -- Objects/codeobject.c && git diff --check -- scripts/vc6-codeobject-c89.test.py — exit 0.

Files changed in this slice: cpython/Objects/codeobject.c, scripts/vc6-codeobject-c89.test.py, and this status log. The compatibility patch was not synchronized or regenerated. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: test-first hoist only linetable and length in _PyCode_InitAddressRange, preserving the assertion → byte-string access → length query → range initialization order. Pre-existing outer and nested changes remain preserved.

Previous latest revision (`_PyObject_MakeTpCall` result local moved to C89 declaration group; frontier at `_PyVectorcall_Call`)

Date: 2026-10-02 01:09 UTC

Read PORT_STATUS.md, README.md, and the active CPython/Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication. Re-probed instead of assuming the recorded frontier: _blake2/blake2s_impl.c compiles, and Objects/call.c is now the actual first blocker.

One narrow C89 slice in cpython/Objects/call.c: _PyObject_MakeTpCall now assigns result = NULL at its original execution point after keyword-dict preparation; its PyObject *result declaration is in the opening declaration group. Control flow, result initialization timing, recursive-call guard, and cleanup order are preserved. The existing focused test scripts/vc6-call-first-c89.test.py was run before the edit and failed as expected with _PyObject_MakeTpCall locals must be declared separately from assignment (exit 1). After the source edit, that regression passed. Its cleanup-order assertion was refined to distinguish the error-path early tuple decref from the post-recursion cleanup; this test-only correction preserves the behavior it intends to check.

Exact verification:

python3 scripts/vc6-call-first-c89.test.py cpython/Objects/call.c — exit 0; call.c first-frontier C89 declarations and dispatch order: PASS.
bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. Most applicable regressions pass, including the new call.c check, but pre-existing failures remain: console type detection preserves control/cleanup order and the numeric-dispatch check's ValueError: substring not found. No unrelated fix was attempted.
Forced fresh compile frontier: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=76 compiled=75 cached=0 skipped=0. call.c now compiles past the previous _PyObject_MakeTpCall diagnostics. First stable remaining diagnostics are in _PyVectorcall_Call: C2143 at call.c(248) before type, followed by dependent C2065 nargs at line 252 and C2275/C2059 on late PyObject *const *args and PyObject *kwnames declarations at lines 256–257. Later errors in this translation unit are distinct follow-on declaration-order blockers and remain untouched. Full compiler log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790903149-1934339-c990.log.
git -C cpython diff --check -- Objects/call.c and git diff --check -- scripts/vc6-call-first-c89.test.py — exit 0.

Files changed in this slice: cpython/Objects/call.c, scripts/vc6-call-first-c89.test.py, and PORT_STATUS.md. The native delegation tool was unavailable because its Anthropic dependency is missing; the scheduled-run Codex CLI command was blocked by the approval guard, so the narrowly scoped change was applied directly and verified independently. Compatibility patch synchronization remains unresolved. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE test. Next frontier: test-first hoist only _PyVectorcall_Call's nargs, args, kwnames, and result locals while preserving tuple access, fast-path, unpack/call/free, and result-check order.

Latest revision (fastsearch C89 blockers cleared; bytearray join is current frontier)

Fresh forced VC6 frontier probe exited 2 with total=73 compiled=72 cached=0 skipped=0. Earlier blockers in Objects/abstract.c, Objects/boolobject.c, the bytearray Clinic/core helpers, and Objects/stringlib/fastsearch.h are now passed by the compiler. Current first diagnostic is cpython/Objects/bytearrayobject.c(2030): C2275/C2065 on the late PyObject *ret in bytearray_join, after self->ob_exports++.

Next slice: add a regression, declare ret at the function's opening, and assign it after the export increment. Preserve the increment → join call → decrement → return sequence. Then immediately rerun the forced frontier; do not assume the 73rd unit is clean until that probe reports it.

Verification: bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh and scoped git diff --check passed after the latest edits. The full regression script is blocked before execution by the lifecycle guard's script-scan budget exhaustion; the new regression blocks have therefore not been verified by that suite. This is compile-frontier evidence only—no linked interpreter, Wine execution, or Windows 98 SE runtime test.

The worktree remains dirty and preserved. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The compatibility patch is still unsynchronized/unverified. After the translation-unit frontier clears, remaining gates include rerunning the regressions, regenerating/verifying the compatibility patch against pristine upstream, linking an interpreter, then separate Wine and actual Windows 98 SE runtime validation. No reset, clean, stash, discard, commit, or push was performed.

Latest revision (`multibytecodec.c` C89/type-definition blockers cleared; frontier advances to `_winapi.c`)

Date: 2026-10-01 19:36 UTC

Continued the forced VC6 frontier while preserving the dirty outer repo and detached CPython checkout. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Since the previous log entry, the frontier advanced through _io/textio.c, winconsoleio.c, _iomodule.c, CJK codec helpers, and multibytecodec.c. Preserved evaluation points and cleanup order while hoisting C89 locals; adjusted Windows offset bounds to the established PY_LLONG_MIN/MAX aliases; changed UTF-16 high-surrogate detection to the documented U+D800–U+DBFF range instead of the Vista-era C3_HIGHSURROGATE flag; converted C99 designated PyModuleDef and PyType_Spec initializers using the verified field order; and updated generated Clinic wrappers. Added focused source/order assertions alongside these edits.

Exact verification:

Latest frontier command: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=69 compiled=68 cached=0 skipped=0. _winapi.c now compiles past the missing legacy SDK names (using exact guarded spellings), C89 environment helper declarations, and the Vista-only process attribute APIs. The VC6 branch uses STARTUPINFOW, omits EXTENDED_STARTUPINFO_PRESENT, and returns ERROR_CALL_NOT_IMPLEMENTED if non-None startup attribute lists are requested; the modern branch remains unchanged. The first remaining errors are missing LCMAP_SORTHANDLE and LCMAP_HASH at _winapi.c(1827), then further C89 declarations in _winapi_LCMapStringEx_impl; LCMapStringEx itself is Vista-only and still requires a real Win9x-compatible path before link/runtime testing.
Focused checks for _winapi legacy constants, environment helper C89/order behavior, and the VC6 CreateProcess branch passed, as did the earlier CJK type/state/module and _io declaration/alias/order checks. bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh and scoped git diff --check passed immediately before the latest frontier run.
bash scripts/vc6-probe-pythoncore-frontier.test.sh remains blocked by the lifecycle guard’s script-scan budget exhaustion; it did not run to completion and is not reported as passing. A repo-wide git diff --check also reports existing trailing-whitespace lines in the already-dirty compat/msvc600/cpython-3.11.16-vc6-headers.patch; that compatibility patch was not edited here. Scoped checks for the files touched in this slice pass.

Files changed in this work include the _io sources and Clinic headers, Modules/cjkcodecs/cjkcodecs.h, multibytecodec.c, Modules/_winapi.c, the frontier regression script, and this log. This remains compile-frontier evidence only: no interpreter has been linked or runtime-tested under Wine or Windows 98 SE. The compatibility patch remains unsynchronized/unverified. Next slice: analyze a Win9x-compatible implementation or explicit unsupported behavior for the LCMapStringEx path before changing its constants, then continue the C89 cleanup in that function.

Previous latest revision (`winconsoleio.c` readinto declarations hoisted; frontier advances within translation unit)

Date: 2026-10-01 18:35 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md. Preserved all pre-existing changes across the outer repository and detached CPython checkout. No reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _channel_is_associated() frontier and the possibility that _blake2/blake2s_impl.c remained the target were stale. A forced fresh probe showed _blake2/blake2s_impl.c compiles and the actual first blocker was cpython/Modules/_io/winconsoleio.c, in readinto() at late declarations for handle, wlen, read_len, n, wbuf, err, and u8n. Used one focused Codex coding lane (Codex 0.153.4, logged in). It hoisted these seven locals to the opening declaration group and converted initializers to assignments at their prior execution points. No intended evaluation, control-flow, or cleanup changes. Added an exact-body regression to scripts/vc6-probe-pythoncore-frontier.test.sh.

TDD: the new focused regression was run RED before the source edit (exit 1 with the expected declaration/order assertion), then GREEN after the edit (exit 0). The full regression script was rerun independently after implementation: exit 1. The new readinto assertion passes. One existing test, console type detection preserves control/cleanup order, still fails; checks of the baseline source confirm this failure predates this slice. console read preserves surrogate-boundary growth on legacy Windows passes now and also passed against baseline, so the earlier reported failure was not reproduced. Other applicable assertions pass. Shell syntax and targeted diff checks pass.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=60 compiled=59 cached=0 skipped=0. readinto() now compiles past its C2275/C2146/C2065 diagnostics. Next errors in this translation unit: C2275/C2065 on wchar_t *tmp at winconsoleio.c(842) in readall(), followed by Clinic Py_ssize_t mode_length errors at Modules/_io/clinic/winconsoleio.c.h(75); preserve these as separate blockers.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; the single known type-detection regression above remains; new readinto and surrogate tests pass.
git -C cpython diff --check -- Modules/_io/winconsoleio.c && git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.
Status check showed all pre-existing changes preserved; CPython baseline tag/commit unchanged. PORT_STATUS.md was not changed by the coding lane; this entry is the only status-log update for this run.

Files changed by this slice: cpython/Modules/_io/winconsoleio.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and PORT_STATUS.md. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. The compatibility patch remains unsynchronized/unverified. Next frontier: test-first hoist the late wchar_t *tmp declaration in readall() while preserving allocation/reallocation/error order; treat generated Clinic declaration errors as a separate subsequent blocker.

Previous latest revision (`_channel_recv` C89 locals hoisted; frontier advances)

Date: 2026-10-01 16:25 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and nested work. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _channels_remove() frontier was stale by this run: fresh forced probe first failed in _channel_recv() at line 1382 with C2275/C2146/C2065 on the late PyThread_type_lock mutex declaration. Used one focused Codex coding lane after confirming Codex 0.153.4 was installed and authenticated. In _channel_recv(), hoisted the five function-scope locals (interp, mutex, chan, data, obj) into its opening declaration group and converted the inline initializers into assignments at their previous execution points. Lock acquisition/release, null/error handling, cleanup, and return order are preserved. Added one exact-body regression for that function.

TDD: the test was added and run before editing production source; it failed as expected (exit 1). After the C change, the focused regression passed (exit 0). The subagent also ran the final focused regression and bash -n; both exited 0. Subsequent independent verification:

bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new _channel_recv regression passed, but the suite then failed in a separately present _channel_recv/drop/association test block at _channel_drop; that test expects a body change not made in this slice. It appeared during the delegated work and was preserved, not modified or treated as part of this slice.
Fresh forced probe XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=53 compiled=52 cached=0 skipped=0. _channel_recv() now compiles past its previous diagnostics. The next reported first blocker is _xxsubinterpretersmodule.c(1553) C2143 before type, with dependent C2065 end at line 1556 in _channel_is_associated(); later independent C89 and type-spelling blockers remain untouched.
git -C cpython diff --check -- Modules/_xxsubinterpretersmodule.c and git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.

Files changed by this slice: cpython/Modules/_xxsubinterpretersmodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and PORT_STATUS.md. All pre-existing changes were preserved. This is compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Compatibility patch remains unsynchronized/unverified. Next frontier: separately inspect/test-first hoist _channel_is_associated()'s late _channelend *end declaration, preserving lookup/error order; address the unrelated suite expectation only in its own deliberate slice.

Latest revision (`_xxsubinterpretersmodule.c` C89 helper declarations advanced; frontier at `_channels_remove`)

Date: 2026-10-01 16:10 UTC

Continued the forced VC6 compile frontier at cpython/Modules/_xxsubinterpretersmodule.c. Preserved all pre-existing work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

C89 declaration-order fixes made in this slice, preserving assignment, lock, cleanup, error, and iteration order:

_copy_raw_string(): hoisted copied; kept allocation after the UTF-8 null check.
_sharednsitem_apply(), _sharedns_free(), _get_shared_ns(), _sharedns_apply(): hoisted locals and loop indices.
_sharedexception_bind(): hoisted outer locals; kept msg at the start of its nested block.
_channel_close_interpreter(), _channels_lookup(), _channels_add(), _channels_close(): hoisted locals while retaining lock acquisition, lookup, and result initialization positions.

Added focused exact-body/order regressions for those helpers. New tests were run RED against the prior code and then GREEN after each relevant edit. Latest focused check run: 13 test blocks passed (four timemodule.c checks and nine _xxsubinterpretersmodule.c checks).

Fresh forced frontier command XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh exited 2 with total=53 compiled=52 cached=0 skipped=0. The earlier _copy_raw_string, shared-namespace, exception, and channel-close errors were cleared. The next first blocker is _xxsubinterpretersmodule.c(1143), C2275 at the late _channelref *prev declaration in _channels_remove(); line 1144 similarly flags _channelref *ref. Later errors in this translation unit include further C89 declaration-order sites; address them from fresh compiler evidence.

git diff --check passed for both modified C files and the regression script. The full regression shell suite and its shell syntax check were not rerun; the lifecycle guard had blocked that script due to scan-budget exhaustion. No interpreter has been linked or run under Wine or Windows 98 SE. The compatibility patch remains unsynchronized/unverified.

Files changed by this slice: cpython/Modules/_xxsubinterpretersmodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log. timemodule.c changes remain from the preceding slice.

Previous latest revision (Windows pysleep declarations moved before first statement; frontier advances to `_xxsubinterpretersmodule.c`)

Date: 2026-10-01 15:26 UTC

Continued the pysleep() C89 fix. The preceding attempt hoisted Windows locals only to the #else branch, which still followed assert(timeout >= 0) in the VC6-preprocessed function. Preserved all existing work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Moved the MS_WINDOWS-guarded declarations for timeout_100ns, relative_timeout, timer, sigint_event, events[2], and rc to the opening declaration group in pysleep(), before the assert. Removed the declarations from the later Windows branch; kept assignments and execution order at their prior points. Updated PY_TIME_SLEEP_TEST to require the locals before the first statement and the branch body to contain only the existing assignments/control flow.

TDD and focused checks: the updated sleep regression failed against the prior source with the intended declaration-placement assertion. After the source edit, PY_TIME_STATE_TEST, PY_TIMEZONE_TEST, PY_TIMEMODULE_DEF_TEST, and PY_TIME_SLEEP_TEST all passed.

Fresh forced frontier command XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh exited 2 with total=53 compiled=52 cached=0 skipped=0. timemodule.c is now past the frontier. The next first blocker is cpython/Modules/_xxsubinterpretersmodule.c(21), C2143 before type at char *copied = PyMem_Malloc(...) in _copy_raw_string(), after the str == NULL check. The following errors in that file are likely cascading; inspect the first diagnostic and fix one declaration-order family at a time.

git diff --check passed for the changed timemodule.c and regression script. The full regression shell suite and shell syntax check were not rerun for this slice; only the four focused Python blocks and forced frontier were exercised. No linked interpreter, Wine execution, or Windows 98 SE runtime test. Compatibility patch remains unsynchronized/unverified.

Files changed by this slice: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log.

Previous latest revision (Windows pysleep C89 declarations hoisted; timemodule remains compiler frontier)

Date: 2026-10-01 14:24 UTC

Continued from the freshly recorded timemodule.c Windows pysleep() declaration frontier. Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before work. Preserved all pre-existing outer and nested work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Used one focused Codex coding-agent lane after confirming codex is installed (codex-cli 0.153.4). The narrow MS_WINDOWS branch of pysleep() now declares _PyTime_t timeout_100ns, LARGE_INTEGER relative_timeout, HANDLE timer, HANDLE sigint_event, HANDLE events[2], and one shared DWORD rc in its opening declaration group. Initializers became assignments at the original execution points; event array initialization became two ordered assignments; branch-local rc declarations were removed. No API or control-flow change intended. Added an exact-branch regression to scripts/vc6-probe-pythoncore-frontier.test.sh.

TDD: the new regression was first run against the prior source and failed as expected with the declaration-hoisting assertion (exit 1). After the source edit, the focused assertion passed; independent complete frontier regression run passed.

Exact verification:

bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0; full suite printed ALL TESTS PASSED.
Fresh forced VC6 probe XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=51 compiled=50 cached=0 skipped=0. _blake2/blake2s_impl.c compiles. timemodule.c remains blocked at the original first error: C2143 at line 2210 before type, now pointing at the hoisted _PyTime_t timeout_100ns declaration. The declaration group is still after the earlier executable assert(timeout >= 0); at function line 2131, so this move did not satisfy C89's function-scope declaration order. The following C2275/C2146/C2065 errors for Windows locals are cascading; no frontier advancement is claimed. Next narrow fix should place the Win32 declarations before the assertion while preserving the assertion and all initialization points. The prior later WaitableTimerEx/API compatibility concerns were not addressed.
git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh and git -C cpython diff --check -- Modules/timemodule.c — exit 0.
The overall diff check remains known to fail on pre-existing whitespace in the untouched generated compatibility patch; it was not modified.

Changed by this slice: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this log. Existing compatibility patch remains unsynchronized/unverified. This is compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next step: inspect the exact first fresh diagnostic and preprocessor structure in Windows pysleep(); establish why the opening declaration group still fails before choosing any further narrow slice.

Previous latest revision (timemodule PyModuleDef initializer converted; frontier advances to Windows pysleep declarations)

Date: 2026-10-01 14:19 UTC

Continued from the timemodule.c designated-initializer blocker. Preserved all pre-existing work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

In cpython/Modules/timemodule.c, converted the timemodule PyModuleDef from C99 designated fields to positional fields. Verified the order against Include/moduleobject.h: m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free. Added a regression in scripts/vc6-probe-pythoncore-frontier.test.sh that checks the exact initializer field order.

TDD: the new focused check failed against the designated initializer with the expected field-order assertion, then passed after the source change. Focused PY_TIME_STATE_TEST, PY_TIMEZONE_TEST, and PY_TIMEMODULE_DEF_TEST all passed.

Verification:

Fresh forced frontier command XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh: exit 2, total=51 compiled=50 cached=0 skipped=0. The C2059 at timemodule.c(2108) is gone. The next first blocker is C2143 at line 2210 in the Windows pysleep() branch; further diagnostics concern declarations for timeout_100ns, relative_timeout, timer, events, and rc.
Nested and outer git diff --check for the changed C source and shell test: exit 0.
The full regression shell script remains unrun because the lifecycle guard exhausted its script-scan budget. No interpreter has been linked or run under Wine or Windows 98 SE. The compatibility patch remains unsynchronized/unverified after recent edits.

Files changed by this slice: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log.

Previous latest revision (init_timezone C89 declarations hoisted; frontier advances to PyModuleDef initializer)

Date: 2026-10-01 14:03 UTC

Continued from the recorded timemodule.c timezone blocker. Preserved all pre-existing work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

In cpython/Modules/timemodule.c, hoisted otz0/otz1 and Windows-only TIME_ZONE_INFORMATION tzinfo = {0} to init_timezone()'s opening declaration group. Removed the late declarations without moving tzset(), timezone constants, GetTimeZoneInformation(), Unicode conversions, or error checks. Added an exact-body regression in scripts/vc6-probe-pythoncore-frontier.test.sh.

TDD: the corrected timezone regression was run against the pre-fix body and failed with the expected hoisting assertion; after the source edit it passed. The existing timemodule state regression also passed. The full regression shell script could not run because the lifecycle guard reported its script-scan budget exhausted; do not infer that full suite or shell syntax check passed.

Verification:

Focused embedded checks PY_TIME_STATE_TEST and PY_TIMEZONE_TEST: passed.
Fresh forced frontier command XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh: exit 2, total=51 compiled=50 cached=0 skipped=0. The previous errors at timemodule.c(1752) and (1762) are gone. The next first blocker is C2059 at line 2108 (. in the designated PyModuleDef initializer). Subsequent diagnostics at lines 2210+ concern declaration order in Windows pysleep().
git -C cpython diff --check -- Modules/timemodule.c and git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh: exit 0.

No interpreter has been linked or run under Wine or Windows 98 SE. The compatibility patch remains unsynchronized/unverified after recent edits. Files changed by this slice: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log.

Previous latest revision (timemodule state locals hoisted; frontier advances to Windows timezone declarations)

Date: 2026-10-01 12:09 UTC

Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before work. Preserved all pre-existing outer and nested edits; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The prior recorded Wine socket issue no longer blocked compilation when using the writable workspace-local XDG_RUNTIME_DIR=build/current-recheck/runtime.

The forced fresh probe confirmed the frontier had advanced from _blake2/blake2s_impl.c to timemodule.c: 50/51 compiled, zero cached. It compiled _blake2/blake2s_impl.c successfully. Earliest reported timemodule.c errors were C2275/C2065 around time_module_state *state at lines 509, 551, 775, and 971. Used exactly one focused Codex coding-agent lane. TDD RED: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/timemodule-state-red.log 2>&1 exited 1; new exact-body assertion failed for all four functions. GREEN: same script redirected to /tmp/timemodule-state-green.log exited 0 and printed ALL TESTS PASSED. The slice hoists only time_module_state *state in time_gmtime, time_localtime, time_strftime, and time_asctime, with get_time_state(module) assignments retained at their prior execution points. Independently inspected the source diff and verified all pre-existing test content remained intact.

After the edit, a forced fresh probe using XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh exited 2 (total=51 compiled=50 cached=0 skipped=0). The four time_module_state errors are gone. The next distinct first blocker is timemodule.c(1752) C2143 before type, followed by C2275/C2146/C2065 for TIME_ZONE_INFORMATION tzinfo at 1762 and dependent errors. Later separate diagnostics include C2059 at 2103 and C2143/C2065 at 2205 onward. Left untouched for the next slice.

Verification: bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh exited 0 (ALL TESTS PASSED); git -C cpython diff --check -- Modules/timemodule.c and git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh exited 0. No linked pythoncore.dll/python.exe, Wine interpreter run, or Windows 98 SE execution. Files changed by this slice: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log. Probe artifacts are under ignored build/current-recheck/. Next frontier: separately inspect and test-first address the first timezone-related declaration/compiler family at timemodule.c around line 1752; keep subsequent diagnostics separate.

Previous revision (timemodule VC6/C89 ticks/ns declarations hoisted; fresh compiler blocked by Wine runtime directory)

Date: 2026-10-01 10:08 UTC

Continued from the recorded timemodule.c frontier after reading this status, README.md, and the CPython/Win9x/MSVC6 reference. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains detached at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Used exactly one focused Codex coding-agent lane. The slice hoisted only clock_t ticks and _PyTime_t ns into _PyTime_GetClockWithInfo's opening declaration group in cpython/Modules/timemodule.c; their initializers became assignments at the original points. No time_module_state or subsequent errors were changed.

TDD: appended an exact-body regression assertion to scripts/vc6-probe-pythoncore-frontier.test.sh, checking both declarations and the preserved function sequence. RED was observed before the source edit (exit 1, expected AssertionError: _PyTime_GetClockWithInfo must hoist only ticks/ns and preserve initialization, info updates, clock/error checks, and conversion order). GREEN after the source edit exited 0 and printed ALL TESTS PASSED.

Exact commands/results:

Command	Exit/result
`env XDG_RUNTIME_DIR="$PWD/build/timemodule-clock-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all bash scripts/vc6-probe-pythoncore-frontier.test.sh` (before source edit)	1; expected RED assertion above.
Same command (after source edit)	0; focused frontier regression suite `ALL TESTS PASSED`.
`bash scripts/vc6-probe.test.sh`	1; Wine bootstrap failure, `wineserver: error creating /run/user/1000/wine/server-801-136fb0/lock: Read-only file system`; compile assertion not reached.
`bash scripts/vc6-probe-core.test.sh`	1; same Wine runtime-directory failure across cases; no compiler diagnostics obtained.
`bash scripts/vc6-probe-stdint.test.sh`	1; same Wine runtime-directory failure before compile.
`bash scripts/vc6-probe-pathcch.test.sh`	1; same Wine runtime-directory failure before compile.
`bash scripts/generate-getpath-frozen.test.sh`	0; all checks passed.
`env XDG_RUNTIME_DIR="$PWD/build/timemodule-clock-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	1; wineserver failed creating its lock under `/run/user/1000/wine`; probe ended at `cpython/Modules/getpath.c`, `total=1 compiled=0 cached=0 skipped=0`. It never invoked the compiler on the source list and did not reach `timemodule.c`; no new compiler diagnostics can be claimed.
`git -C cpython diff --check -- Modules/timemodule.c` and `git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh`	0. Whole nested `git -C cpython diff --check` also exited 0. Whole outer `git diff --check` exited 2 due existing whitespace errors in the pre-existing generated compatibility patch; excluding that file, outer diff check exited 0. Generated patch left unchanged.

Independent preservation verification compared entry-snapshot hashes for every pre-existing tracked/untracked file: all existing changes remain intact, and the only changes beyond that snapshot are this slice's timemodule.c, appended frontier assertion, and this log. Changed files this run: cpython/Modules/timemodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and PORT_STATUS.md. Probe/test logs are under ignored build/timemodule-clock-slice/.

Compiler frontier advancement is unverified: Wine failed before compilation, so the expected timemodule.c diagnostics have not been freshly cleared. This is not a linked pythoncore.dll/python.exe, Wine interpreter, or Windows 98 SE result. Next action: restore a writable Wine runtime socket directory and rerun the forced-fresh source-list probe; if the two diagnostics clear, separately address the next time_module_state declaration family test-first.

Latest revision (_PyTraceMalloc_NewReference declarations; frontier advances)

Date: 2026-10-01 08:01 UTC

Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before acting. Preserved every pre-existing outer and nested change; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. A forced fresh probe confirmed the recorded _tracemalloc.c frontier remained current and _blake2/blake2s_impl.c still compiles.

One narrow C89 slice in cpython/Modules/_tracemalloc.c: hoisted uintptr_t ptr, PyTypeObject *type, int res, and trace_t *trace into _PyTraceMalloc_NewReference's initial declaration group. Assignment points, control flow, and TABLES_LOCK()/TABLES_UNLOCK() order are unchanged. Added a focused exact-body assertion in scripts/vc6-probe-pythoncore-frontier.test.sh. Used the installed Codex CLI as the single focused coding agent after checking its availability; its changes were independently diff-reviewed and re-tested.

Exact commands/results:

codex exec --sandbox workspace-write -C /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x --ephemeral ... — exit 0. The child first added the test, then ran RED before editing production source: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1, expected assertion AssertionError: _PyTraceMalloc_NewReference must hoist ptr/type/res/trace into the initial C89 declaration group, followed by FAILED.
Child GREEN: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0, focused assertion passed and ALL TESTS PASSED.
Independent syntax + regression run: bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0, all checks passed (ALL TESTS PASSED).
Fresh compiler probe: XDG_RUNTIME_DIR="$PWD/build/tracemalloc-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=51 compiled=50 cached=0 skipped=0. _tracemalloc.c now compiles past the prior _PyTraceMalloc_NewReference C89 diagnostics. First blocker advanced to cpython/Modules/timemodule.c: C2275/C2146/C2065 at line 164 (clock_t ticks), line 171 (_PyTime_t ns), and line 507 (time_module_state state); further errors occur at lines 549, 773, 969, 1746–1759, 2097, and 2199–2294. These remain untouched for a separate slice.
git -C cpython diff --check -- Modules/_tracemalloc.c and git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0. Full diff inspection confirmed this run's only source/test files changed are cpython/Modules/_tracemalloc.c and scripts/vc6-probe-pythoncore-frontier.test.sh; all unrelated existing diffs were preserved.

Files changed by this slice: cpython/Modules/_tracemalloc.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log. The generated compatibility patch was deliberately not regenerated; its pre-existing synchronization/drift state remains unresolved. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was done.

Next frontier: one isolated, test-first C89 declaration slice in cpython/Modules/timemodule.c, beginning with its earliest diagnostics (clock_t ticks, _PyTime_t ns, and time_module_state state).

Previous revision (_tracemalloc traceback lookup declarations; frontier advances)

Date: 2026-10-01 05:53 UTC

Continued from the recorded _tracemalloc.c frontier after reading this status, README.md, and the CPython/Win9x/MSVC6 reference. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

One narrow C89 slice in cpython/Modules/_tracemalloc.c: hoisted only trace_t *trace and _Py_hashtable_t *traces into tracemalloc_get_traceback's opening declaration group. The table lookup remains inside the existing TABLES_LOCK() region. Added a focused exact-body assertion to scripts/vc6-probe-pythoncore-frontier.test.sh. Strict TDD was observed: the focused test first failed with the expected assertion before the source edit (exit 1), then passed after it (exit 0). The coding subagent was the installed authenticated Codex CLI; its diff was independently inspected and verified.

Exact commands/results:

RED: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/tracemalloc-tdd/red.log 2>&1 — exit 1, expected AssertionError: tracemalloc_get_traceback must hoist only trace/traces and preserve guarded, locked lookup order.
GREEN: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/tracemalloc-tdd/green.log 2>&1 — exit 0, ALL TESTS PASSED. Repeated directly after the probe with bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0, ALL TESTS PASSED. bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.
Initial forced probe without a writable Wine runtime directory: exit 1 before compilation (sock_init: ERROR in sock_check_pollhup(); wineserver could not create its lock under read-only /run/user/1000; total=1, compiled=0). Retried using writable workspace runtime directory: XDG_RUNTIME_DIR="$PWD/build/tracemalloc-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, fresh total=49 compiled=48 cached=0 skipped=0. _tracemalloc.c now compiles past the prior tracemalloc_get_traceback diagnostics (C2275/C2065 at lines 1454/1456 are cleared). First stable remaining errors are separate C89 declarations in _tracemalloc.c at lines 1816–1834: C2275/C2146/C2065 (uintptr_t ptr), C2275/C2065 (PyTypeObject type), C2143 around line 1825, C2275/C2065 (trace_t trace), C2223 on trace->traceback, and C2065 (res). They are left untouched for a separate slice.
git -C cpython diff --check and outer git diff --check excluding the generated compatibility patch — exit 0. cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch — exit 1, confirming pre-existing generated-patch drift; the patch was not regenerated or modified by this slice. Baseline/tag unchanged. Existing outer changes to PORT_STATUS.md, compatibility files, fixture, and test script were preserved.

Files changed by this slice: cpython/Modules/_tracemalloc.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and this status log. Probe artifacts are under ignored build/tracemalloc-slice/. This remains compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter run, or Windows 98 SE execution.

Next frontier: separately hoist the C89 locals in _PyTraceMalloc_Track (the diagnostics around lines 1816–1834), preserving the existing type-check, traceback allocation, and result/error order.

Previous latest revision (_tracemalloc get-traces declaration slice; VC6 frontier advances)

Date: 2026-10-01 03:41 UTC

One isolated C89 slice in cpython/Modules/_tracemalloc.c: hoisted only int err to the opening declaration group of _tracemalloc__get_traces_impl; its assignment remains after set_reentrant(1). Added focused assertions in scripts/vc6-probe-pythoncore-frontier.test.sh for declaration placement and traversal/reentrancy/error-check order. Preserved preceding user edits; used one focused Codex coding subagent after the native delegation tool failed because the Anthropic dependency is missing. No reset, clean, stash, discard, commit, push, or compatibility-patch regeneration. Nested HEAD is 41388c9cb160d0886d5ca00d2e6c878260a8a4549, matching the recorded baseline.

Exact commands/results:

RED: bash scripts/vc6-probe-pythoncore-frontier.test.sh > build/tracemalloc-slice/red.log 2>&1 — exit 1, tracemalloc get-traces must declare err before statements for VC6, followed by FAILED, before production edit.
Prepared workspace-local Wine prefix with cp -a /home/ubuntu/.wine-win9xport build/tracemalloc-slice/wineprefix (exit 0).
Forced probe with the established user prefix: WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, fresh total=49 compiled=48 cached=0 skipped=0. _tracemalloc.c compiled past the original line-1410/1413 err blocker. First stable remaining diagnostics are C2275/C2065 at line 1454 (trace_t trace) and line 1456 (_Py_hashtable_t *traces) in tracemalloc_get_traceback; later mixed declarations remain at lines 1815–1833. This is compiler-probe progress only.
Focused regressions: WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0, ALL TESTS PASSED. bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh — exit 0; every named suite passed (ALL TESTS PASSED).
git -C cpython diff --check and git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch' — exit 0. cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch returned exit 1, confirming existing generated-patch drift; patch left untouched. No rebuild of the patch was attempted.

Files changed in this slice: cpython/Modules/_tracemalloc.c, scripts/vc6-probe-pythoncore-frontier.test.sh, PORT_STATUS.md; local verification artifacts in ignored build/. Source delta against the entry snapshot is exactly one added declaration and removal of int at the original assignment.

Next frontier: C89-hoist trace_t *trace and _Py_hashtable_t *traces in tracemalloc_get_traceback in a separate test-first slice, preserving the table lookup under the existing lock. Later C89 errors around line 1815 remain separate. The original err diagnostic family is cleared by the fresh compiler probe. No linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution was performed.

Latest revision (signalmodule Windows wakeup initializer cleared; signalmodule remains blocked)

Date: 2026-10-01 01:34 UTC

Continued from the fresh signalmodule.c frontier, preserving all existing outer and nested CPython work. No reset, clean, stash, discard, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

One narrow C89 compatibility slice: changed only the MS_WINDOWS wakeup aggregate initializer in Modules/signalmodule.c from designated fields to {INVALID_FD, 1, 0}, retaining declared field order and values; non-Windows initializer unchanged. Added a focused test in scripts/vc6-probe-pythoncore-frontier.test.sh. The new assertion was verified RED against pristine nested HEAD (git show HEAD:Modules/signalmodule.c input; assertion failed with the expected message, exit 1), then GREEN with the updated working source as part of the frontier regression suite (exit 0). Native Hermes delegation was unavailable because its Anthropic dependency is absent; used installed Codex CLI in the existing checkout and independently inspected/tested its narrow diff.

Forced fresh VC6 frontier probe after the edit: exit 2, total=45 compiled=44 cached=0 skipped=0. signalmodule.c still fails, but the Windows wakeup designated-initializer C2059 at line 118 is gone. Remaining first stable diagnostic is C2079 at Modules/socketmodule.h(268) (bt_rc uses undefined SOCKADDR_BTH_REDEF), followed by signalmodule C89 errors including C2143/C2065 at lines 315/318 (interp); numerous further C89/type errors remain. This is compile-probe progress only: no pythoncore/python.exe link, Wine interpreter run, or Windows 98 SE execution.

Exact verification:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	Exit 2; fresh compile 44/45, zero cached; signalmodule still blocked as above, designated initializer diagnostic cleared.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	Exit 0; all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	Exit 0; patch matches full nested diff byte-for-byte.
Apply refreshed patch to pristine archive of baseline `HEAD`, then compare all changed files	Exit 0; patch applies and all 68 changed CPython files match nested working tree.
Nested and outer `git diff --check`	Exit 0.

Files changed in this slice: cpython/Modules/signalmodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, regenerated compat/msvc600/cpython-3.11.16-vc6-headers.patch, and PORT_STATUS.md. All earlier edits remain preserved. Next frontier: investigate the socket-header SOCKADDR_BTH_REDEF definition/guard in context, then separately address C89 diagnostics in signalmodule.c with their own focused regression slice.

Latest revision (sha256module blockers cleared; sha512module next)

Date: 2026-10-01 01:14 UTC

Continued from the verified sha256module.c frontier without discarding or resetting any outer or nested work. No commit or push. CPython remains at detached v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

In Modules/sha256module.c, changed both SHA224/SHA256 PyType_Spec records to declared positional order (including itemsize = 0), hoisted state and new into C89 declaration groups in both constructors while leaving state lookup after buffer acquisition, and changed _sha256module to positional PyModuleDef fields with an explicit NULL doc slot. Added a test-first regression for the type specs, declaration placement/order, and module initializer; it failed before the changes and passed afterward.

Forced fresh compile-frontier result: exit 2, total=44 compiled=43 cached=0 skipped=0. sha256module.c now compiles. The next blocker is cpython/Modules/sha512module.c: VC6 reports bad numeric suffixes and illegal long long at lines 132, 145, and 146. No interpreter has been linked or runtime-tested.

Verification: scripts/vc6-probe-pythoncore-frontier.test.sh passed; git -C cpython diff --check and outer diff checks excluding the generated patch passed. The refreshed compatibility patch applies to pristine CPython v3.11.16 and all 67 changed CPython files match the nested working tree. No commit or push.

Files changed in this slice: cpython/Modules/sha256module.c, scripts/vc6-probe-pythoncore-frontier.test.sh, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and this status log.

Latest revision (sha1module blockers cleared; sha256module next)

Date: 2026-10-01 00:58 UTC

Continued from the verified sha1module.c frontier. Preserved existing outer/nested work; no reset, clean, stash, discard, commit, or push. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

In Modules/sha1module.c, changed SHA1_INT64 to PY_LONG_LONG (the VC6 configuration maps this to __int64), converted sha1_type_spec to positional PyType_Spec field order, hoisted st into _sha1_sha1_impl's C89 declaration group while retaining assignment after buffer acquisition, and converted _sha1module to positional PyModuleDef fields with a NULL doc slot. Added test-first regression assertions; the test failed before these changes and passed afterward.

Forced fresh compile-frontier result: exit 2, total=43 compiled=42 cached=0 skipped=0. Both posixmodule.c and sha1module.c now compile. The frontier moved to cpython/Modules/sha256module.c: designated-initializer errors at lines 562 and 570, followed by C89 declaration errors at lines 599 and 645, then cascading diagnostics. This is compile-only; no interpreter link or Win9x runtime test.

Verification: scripts/vc6-probe-pythoncore-frontier.test.sh passed with the new SHA1 checks. git -C cpython diff --check and outer diff checks excluding the generated patch passed. The refreshed compatibility patch applies to pristine CPython v3.11.16; all 66 changed CPython files match the nested working tree. No commit or push.

Files changed in this slice: cpython/Modules/sha1module.c, scripts/vc6-probe-pythoncore-frontier.test.sh, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and this status log.

Latest revision (posixmodule C89 and PyModuleDef blockers cleared; sha1module next)

Date: 2026-10-01 00:49 UTC

Continued from the verified posixmodule.c frontier. Preserved all existing outer and nested changes; no reset, clean, stash, discard, commit, or push. CPython remains at detached v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

In posixmodule_exec, hoisted ScandirIteratorType, list, and trace into the opening C89 declaration group, leaving their assignments and traversal order unchanged. Replaced the posixmodule C99 designated PyModuleDef initializer with positional fields matching struct PyModuleDef declaration order in Include/moduleobject.h. Added test-first regression assertions for both changes; the new initializer test failed before the conversion and passed after.

Forced fresh compile-frontier result: exit 2, total=42 compiled=41 cached=0 skipped=0. posixmodule.c now compiles cleanly. The first blocker moved to cpython/Modules/sha1module.c: C2632 at line 36 (long followed by long is illegal). Later diagnostics in that file include C2059 at line 476 (designated initializer), C2143/C2065 around lines 505–506 (st), and C2059 at line 591. These are the next work items; the current first blocker is the 64-bit type spelling at line 36.

Verification: scripts/vc6-probe-pythoncore-frontier.test.sh, vc6-probe.test.sh, vc6-probe-core.test.sh, vc6-probe-pathcch.test.sh, generate-getpath-frozen.test.sh, and vc6-probe-stdint.test.sh all passed. git -C cpython diff --check and outer diff checks excluding the generated patch passed. The generated compatibility patch applies to pristine CPython v3.11.16 and its 65 changed files match the nested working tree. This remains compile-only: no interpreter link or Win9x runtime test.

Files changed in this slice: cpython/Modules/posixmodule.c, scripts/vc6-probe-pythoncore-frontier.test.sh, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and this status log. No commit or push.

Latest revision (VC6 LoadLibrary flag definitions added; posixmodule C89 frontier next)

Date: 2026-09-30 23:54 UTC

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 references before editing. Preserved all prior outer and nested modifications; no reset, clean, stash, discard, commit, or push. CPython baseline remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Resolved the missing-identifier compile family in posixmodule.c: added Include/internal/pycore_win9x_loadlibrary.h, included after <windows.h> in Modules/posixmodule.c and Python/dynload_win.c, and supplied guarded documented values for the five LOAD_LIBRARY_SEARCH_* constants when compiling with _MSC_VER < 1300. Microsoft documents these flag values for newer Windows loaders; they do not add those loader semantics to Windows 9x (the newer flags require an update even on certain Vista/Windows 7 releases; see https://learn.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexw). This is compile-time header compatibility only. Runtime loader fallback remains required before claiming a working Win9x interpreter.

Added a regression check to scripts/vc6-probe-pythoncore-frontier.test.sh. Confirmed RED when the compatibility header was absent; after adding the guarded definitions and including them in both consumers, the full frontier regression script passed.

A forced fresh source-list probe now compiles 39/40 sources with zero cached objects. posixmodule.c itself is reached and the five LOAD_LIBRARY_SEARCH_* C2065 errors are gone. The probe still exits 2: the first remaining diagnostics are C2275 for PyObject and C2065 for ScandirIteratorType at line 16174. Further separate C89 errors begin at line 16221 (list), line 16225 (trace), and line 16247 (.). These remain untouched; current compile frontier has moved, not completed.

Verification:

Command	Result
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all checks passed, including the new flag-definition test.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh compile 39/40, zero cached; flag errors cleared; first blocker advanced to C89 diagnostics in `posixmodule.c`.
`bash -n` on the frontier/probe/regression scripts, then `vc6-probe.test.sh`, `vc6-probe-core.test.sh`, `vc6-probe-pathcch.test.sh`, `generate-getpath-frozen.test.sh`, `vc6-probe-stdint.test.sh`, and `git diff --check`	0; all applicable suites and whitespace checks passed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all bash scripts/vc6-probe-core.sh cpython/Python/dynload_win.c`	2; direct probe is incomplete because it omits the project `PY3_DLLNAME` define and also encounters C89 diagnostics; no `LOAD_LIBRARY_SEARCH_*` errors appeared. This is not a valid full `dynload_win.c` build result.
Generated compatibility patch `compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `git apply --check` and apply to pristine `v3.11.16` archive, then byte-compare all changed files	Passed; all 65 patched files matched the nested working tree.

Files changed for this slice: Include/internal/pycore_win9x_loadlibrary.h, Modules/posixmodule.c, Python/dynload_win.c, scripts/vc6-probe-pythoncore-frontier.test.sh, and the generated outer compatibility patch. No interpreter was linked or run; no Windows 98 SE execution was attempted.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 21:18 UTC

Read PORT_STATUS.md, README.md, and the CPython/Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Re-probed the active frontier rather than resuming the stale _blake2/blake2s_impl.c note: that source still compiles, while posixmodule.c remains the first blocker. The Win9x-visible contract for the five exported loader-search constants is not established, so no speculative implementation or coding subagent was appropriate.

Forced fresh probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at 16173 (ScandirIteratorType), 16220 (list), 16224 (trace), and 16246; untouched.

Files changed this run: PORT_STATUS.md only. All prior outer changes and nested CPython changes remain preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git status --short --branch; date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline/tag unchanged, existing edits preserved; timestamp `2026-09-30 21:18 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh compile 39/40, zero cached; first stable errors are five C2065 identifiers above; compiler exit 2, first blocker `cpython/Modules/posixmodule.c`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer whitespace checks passed; patch matches complete nested diff byte-for-byte.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported constants, then add a focused failing test before a narrow source change; keep later C89 diagnostics separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 19:13 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before acting. Preserved all existing outer and nested changes; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Re-probed the actual frontier rather than returning to the earlier _blake2/blake2s_impl.c sequence: that source still compiles, and posixmodule.c is still the first blocker. No compatibility implementation was safe because the Win9x-visible contract for the five exported loader-search constants remains unestablished; this was diagnostic-only, so no coding subagent was used.

The forced-fresh probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable errors: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), then line 16220 (list), line 16224 (trace), and line 16246; left untouched. The probe returned 2, with cl.exe exit status: 2 and first compile blocker: cpython/Modules/posixmodule.c.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test changes and all nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`date -u '+%Y-%m-%d %H:%M UTC'; git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; timestamp `2026-09-30 19:13 UTC`; baseline/tag unchanged and existing modifications preserved.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first diagnostics and later distinct C89 family as above. `_blake2/blake2s_impl.c` compiled successfully.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; both diff checks passed and compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five loader-search constants, then write a focused failing test before a narrow source change. Keep the later C89 diagnostics separate.

Previous latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 15:05 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before acting. Preserved all existing outer and nested changes; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Re-probed rather than assuming the earlier _blake2/blake2s_impl.c note was the current frontier: it still compiles, while posixmodule.c remains the first blocker. Since the unresolved loader-search constants are still the first error family and their intended Win9x-visible exported API behavior is not established, this run made no speculative source/test change and did not delegate implementation.

The forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0). First stable errors are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89 diagnostics begin at line 16173 (ScandirIteratorType), then 16220 (list), 16224 (trace), and 16246; none changed.

Files changed this run: PORT_STATUS.md only. Pre-existing outer compatibility patch/test edits and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'; git status --short --branch`	0; nested modifications preserved; baseline/tag unchanged; timestamp `2026-09-30 15:05 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh compile-only probe compiled 39/40 with zero cached sources; first stable errors are the five C2065 constants above; subsequent C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed and compatibility patch byte-matches the complete nested diff.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before a narrow implementation; keep the later C89 blockers separate.

The forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0). _blake2/blake2s_impl.c compiled successfully. First stable errors: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 errors begin at line 16173 (ScandirIteratorType), line 16220 (list), line 16224 (trace), and line 16246; these remain untouched.

Files changed this run: PORT_STATUS.md only. All pre-existing outer and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && date -u '+%Y-%m-%d %H:%M UTC'`	0; nested modifications preserved; baseline/tag unchanged; `2026-09-30 13:01 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources. First stable diagnostics are the five C2065 constants above; later C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was verified. Next frontier: establish authoritative Win9x behavior for the five exported loader-search constants, then add a focused failing test before a narrow implementation change. Keep the later C89 diagnostics separate.

Date: 2026-09-30 04:45 UTC

Read PORT_STATUS.md, README.md, and the legacy-toolchain reference before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Forced fresh probe confirms _blake2/blake2s_impl.c still compiles and is not the active frontier. The first blocker remains five undeclared LOAD_LIBRARY_SEARCH_* constants in posixmodule.c; the Win9x-visible API contract remains unresolved, so no speculative implementation or coding subagent was appropriate.

Probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89 diagnostics begin at line 16173 (ScandirIteratorType), then line 16220 (list), line 16224 (trace), and line 16246. No production source or regression test was changed.

Files changed this run: PORT_STATUS.md only. Existing outer compatibility patch/test modifications and all nested CPython modifications were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; pre-existing modifications preserved; baseline/tag unchanged; `2026-09-30 04:45 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh run compiled 39/40 with zero cached sources. First stable errors are the five C2065 constants above; later distinct C89 diagnostics remain. Full output: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/frontier-current.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested/outer diff checks passed and generated patch byte-matches the full nested diff.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: resolve authoritative intended Win9x behavior for the five exported constants, then add a focused failing test before a narrow change. Keep later C89 diagnostics separate.

Latest revision (forced fresh frontier recheck; posixmodule loader constants remain blocker)

Date: 2026-09-30 00:40 UTC

Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true, but is not the active frontier. Forced fresh probe reconfirmed posixmodule.c as the first blocker. This run was diagnostic-only: the intended Win9x-visible contract for the five exported loader-search constants is still unresolved, so no compatibility source/test edit or coding subagent was appropriate.

The forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), then line 16220 (list), 16224 (trace), and line 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test edits and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`date -u '+%Y-%m-%d %H:%M UTC'; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git -C cpython status --short --branch`	0; timestamp `2026-09-30 00:40 UTC`; baseline/tag unchanged; existing nested edits preserved.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources; exact first stable errors are the five C2065 constants above; later distinct C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'; git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; outer/nested whitespace checks passed and tracked compatibility patch byte-matches the complete nested diff.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before a narrow change. Keep later C89 diagnostics separate.

Latest revision (forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 22:33 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference before probing. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true, but it is not the active frontier. Forced fresh probe reconfirmed posixmodule.c as first blocker, so this run was diagnostic-only; the Win9x API contract for its five exported loader-search constants remains unresolved. No implementation subagent or source/test edit was appropriate.

The fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), followed by line 16220 (list), 16224 (trace), and line 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test edits and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git -C cpython status --short --branch; date -u '+%Y-%m-%d %H:%M UTC'`	0; existing modifications preserved; CPython baseline/tag unchanged; timestamp `2026-09-29 22:33 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; exact first errors are the five C2065 loader-search constants above; later distinct C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested/outer diff checks passed; generated compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Previous revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 20:29 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython 3.11.16/Win9x/MSVC6 reference before probing. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c still compiles and is not the active frontier. A forced fresh probe reconfirmed posixmodule.c as the first blocker. The Win9x API contract for its five exported loader-search constants remains unresolved, so this run was diagnostic-only; no implementation subagent or source/test edit was appropriate.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), followed by line 16220 (list), 16224 (trace), and line 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test edits and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; existing outer and nested edits preserved; baseline/tag unchanged; timestamp `2026-09-29 20:29 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources. First stable errors are the five C2065 loader-search constants listed above; later distinct C89 errors remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression tests and shell syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed; generated compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Previous revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 18:25 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c still compiles and is not the active frontier. A forced fresh probe reconfirmed posixmodule.c as first blocker. The Win9x API contract for its five exported loader-search constants remains unresolved, so this was diagnostic-only; no implementation subagent or source/test edit was appropriate.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test edits and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; existing outer and nested edits preserved; baseline/tag unchanged; timestamp `2026-09-29 18:25 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources. First stable errors are the five C2065 loader-search constants listed above; later distinct C89 errors remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression tests and shell syntax checks passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Previous revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c compiles, but is not the active frontier. The forced fresh probe reconfirmed posixmodule.c as the first blocker. The intended Win9x API contract for the five exported loader-search constants remains unresolved, so no source/test edit or implementation subagent was appropriate.

The forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable errors: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics start at line 16173 (ScandirIteratorType), followed by errors at 16220 (list), 16224 (trace), and 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer compatibility-patch and frontier-test changes and all nested CPython modifications were preserved.

Exact commands/results:

|| Command | Exit/result | ||---|---| || git status --short --branch; git rev-parse HEAD; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC' | 0; existing changes preserved; CPython baseline/tag unchanged; timestamp 2026-09-29 16:20 UTC. | || WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh | 2; forced fresh probe compiled 39/40, zero cached; exact first errors are the five C2065 loader-search constants above; separate C89 errors follow. | || bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; all applicable syntax checks and regression suites passed (ALL TESTS PASSED). | || git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch' | 0; nested and outer diff checks passed; generated compatibility patch matches the complete nested diff byte-for-byte. |

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Previous revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 10:08 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all existing outer and nested changes. No reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c still compiles but is not the active frontier. The forced fresh source-list probe reconfirmed posixmodule.c as the first blocker; the intended Win9x API contract for the five exported loader-search constants is unresolved, so this was diagnostic-only and no coding subagent or implementation change was appropriate.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics start at line 16173 (ScandirIteratorType), followed by errors at 16220 (list), 16224 (trace), and 16246; untouched.

Files changed this run: PORT_STATUS.md only. Existing compatibility-patch edits, frontier-test edits, and the extensive nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; pre-existing outer and nested changes preserved; baseline/tag unchanged (`v3.11.16`, `41388c9cb160d0886d5ca00d2e6c878260a8a4549`).
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh forced probe compiled 39/40, zero cached; first errors are the five C2065 loader-search constants above; distinct C89 diagnostics follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ":(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch"`	0; nested/outer whitespace checks passed; compatibility patch matches complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before any source edit. Keep later C89 blockers separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 08:00 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all existing outer and nested changes. No reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c remains successful but is not the active frontier. Forced fresh probe reconfirmed the first blocker in posixmodule.c; the Win9x API contract for the five exported loader-search constants is unresolved, so this was diagnostic-only and no coding subagent or implementation change was appropriate.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics start at line 16173 (ScandirIteratorType), followed by errors at 16220 (list), 16224 (trace), and 16246; untouched.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch changes, frontier test edits, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline/tag unchanged; existing nested modifications preserved; `2026-09-29 08:00 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh forced probe compiled 39/40, zero cached; first diagnostics are the five C2065 loader-search constants above; separate C89 diagnostics follow. Full log: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/python-win9x-frontier-20260929-0800.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed; generated compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then write a focused failing test before any source edit. Keep later C89 blockers separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 05:56 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all existing outer and nested changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c compile state remains true but is not the active frontier. Forced fresh probe reconfirmed posixmodule.c as first blocker; the Win9x API contract of the exported loader-search constants remains unresolved, so this run was diagnostic-only and no coding subagent was used.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable errors: C2065 at posixmodule.c(15856)–(15860) for all five LOAD_LIBRARY_SEARCH_* constants (DEFAULT_DIRS, APPLICATION_DIR, SYSTEM32, USER_DIRS, DLL_LOAD_DIR). Distinct subsequent C89 diagnostics start at line 16173 (ScandirIteratorType), followed by errors at 16220, 16224, and 16246; not addressed.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression script edits, and nested CPython changes were preserved.

Exact commands/results:

|| Command | Exit/result | ||---|---| || git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && date -u '+%Y-%m-%d %H:%M UTC' | 0; pre-existing changes preserved; baseline/tag unchanged; 2026-09-29 05:56 UTC. | || WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh | 2; forced fresh probe compiled 39/40, zero cached; first errors are five C2065 loader-search constants; later distinct C89 errors remain. | || bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; all applicable regression suites passed (ALL TESTS PASSED). | || git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch' | 0; nested/outer diff checks passed and generated compatibility patch byte-matches complete nested diff. |

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior of the five exported loader-search constants; then write a focused failing test before any source edit. Keep later C89 blockers separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 03:52 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before probing. Preserved all existing outer and nested changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true, but is not the current frontier. Fresh forced probe reconfirmed posixmodule.c as first blocker; no implementation change was safe because exported loader-search constants' Win9x API contract remains unresolved. Diagnostic-only; no coding subagent used.

Probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable errors are C2065 at posixmodule.c(15856)–(15860) for all five LOAD_LIBRARY_SEARCH_* constants. Distinct later C89 errors start at line 16173 (ScandirIteratorType), followed by errors at 16220, 16224, and 16246. No source/test changes were made.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression script, and nested CPython edits preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline/tag unchanged; existing nested changes preserved; 2026-09-29 03:52 UTC.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first errors are five C2065 constants above. Full log: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/python-win9x-frontier-current.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine execution, or Windows 98 SE execution verified. Next frontier: establish intended Win9x behavior of the five exported loader-search constants using authoritative API evidence; then write a focused failing test before any source edit. Keep later C89 blockers separate.

Latest revision (scheduled forced VC6 frontier recheck; posixmodule remains first blocker)

Date: 2026-09-29 01:51 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested edits; no reset, clean, stash, discard, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state is still true, but it is not the active frontier. A forced fresh probe reconfirmed the first blocker in posixmodule.c; the intended Win9x-visible contract for its five exported loader-search constants remains unresolved, so this run was diagnostic-only. No coding subagent was used because implementation was not appropriate.

The fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15859) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, and LOAD_LIBRARY_SEARCH_USER_DIRS. The recorded fifth constant (LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR) did not appear in this probe output. Separate later C89 diagnostics begin at posixmodule.c(16173) (ScandirIteratorType), then at 16220 (list) and 16224 (trace), with cascading diagnostics; untouched. No source or test files were changed.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression-test edits, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; existing modifications preserved; CPython baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe; 39/40 compiled, zero cached; `_blake2/blake2s_impl.c` compiled. First reported errors are four C2065 loader-search constants at `posixmodule.c(15856)`–`(15859)`; distinct C89 errors follow. Full log: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/python-win9x-frontier.1E0y6P.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested/outer whitespace checks passed; generated patch byte-matches the complete nested diff.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: investigate why LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR was not reported and establish authoritative intended Win9x behavior for all five exported constants; then write a focused failing test before any source edit. Keep later C89 diagnostics separate.

Latest revision (scheduled fresh forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 23:47 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, overwrite, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c sequence remains compiling, but is not the active frontier. A forced fresh probe reconfirmed the first blocker in posixmodule.c; no implementation slice was safe because the Win9x-visible contract for its five exported loader-search constants remains unresolved. Diagnostic-only; no coding subagent was used.

The forced probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by list at 16220 and trace at 16224, with cascading errors; untouched.

Files changed this run: PORT_STATUS.md only. Existing outer modifications and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; pre-existing modifications preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; first stable diagnostics are the five C2065 constants above; separate C89 diagnostics follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed; generated compatibility patch matched the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then write a focused failing test before any source change. Keep later C89 diagnostics distinct.

Previous revision (scheduled fresh forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 21:43 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, overwrite, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c sequence remains compiling but is not the active frontier. A forced fresh probe reconfirmed the first blocker in posixmodule.c; no safe implementation slice was established because the intended Win9x-visible contract for its five exported loader-search constants remains unresolved. This was diagnostic-only; no coding subagent was used because implementation was not appropriate.

The fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (list) and line 16224 (trace), followed by cascading diagnostics; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer modifications and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git rev-parse HEAD && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; preserved existing modifications; CPython baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; first stable errors are the five C2065 constants above; distinct later C89 errors remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed; generated compatibility patch matched the complete nested diff byte-for-byte.

Previous revision (fresh forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 17:32 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c sequence remains compiling but is not the active frontier. The forced fresh probe reconfirmed the recorded first blocker in posixmodule.c; no safe implementation slice was established because the intended Win9x-visible contract for its five exported loader-search constants remains unresolved. No coding subagent was used because implementation was not appropriate for this diagnostic-only run.

The fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Subsequent separate C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (list) and 16224 (trace), followed by related cascading diagnostics; untouched.

Files changed this run: PORT_STATUS.md only. All pre-existing outer changes and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; existing nested modifications preserved; timestamp `2026-09-28 17:32 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; first stable errors are the five C2065 constants above; later distinct C89 errors remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer whitespace checks passed; generated compatibility patch matched the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Latest revision (fresh forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 15:30 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c sequence is still compiling and is not the active frontier. A forced fresh probe reconfirmed the recorded first blocker in posixmodule.c; no safe implementation slice was established because the intended Win9x-visible contract for its five exported loader-search constants remains unresolved. No coding subagent was used because implementation was not appropriate for this diagnostic-only run.

The fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (list) and 16224 (trace); untouched.

Files changed this run: PORT_STATUS.md only. All pre-existing outer changes and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; existing nested changes preserved; timestamp `2026-09-28 15:28 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; first stable errors are the five C2065 constants above; later distinct C89 errors remain. Full log: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/python-win9x-frontier.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch' && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0 before the status update; outer diff clean, nested diff clean, generated compatibility patch matched the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Previous revision (fresh forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 13:27 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The requested _blake2/blake2s_impl.c sequence remains compilable and is not the active frontier. The forced fresh source-list probe reconfirmed the active blocker in posixmodule.c; because the intended Win9x-visible contract for its five exported loader-search constants remains unresolved, this was diagnostic-only. No source/test change or coding subagent was appropriate.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct subsequent VC6/C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (list) and 16224 (trace); not addressed.

Files changed this run: PORT_STATUS.md only. All pre-existing outer changes and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; existing nested modifications preserved; timestamp `2026-09-28 13:27 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first stable diagnostics are the five C2065 constants above; later distinct C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then write a focused failing test before source changes. Keep the later C89 diagnostics separate.

Date: 2026-09-28 11:23 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, overwrite of unrelated changes, commit, push, or publication. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The requested _blake2/blake2s_impl.c sequence still compiles but is not the active frontier. The forced source-list probe confirms the first blocker remains in posixmodule.c; its exported loader-search constant contract is still unresolved, so this was a diagnostic-only run and no coding subagent or speculative source/test edit was appropriate.

The fresh forced probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then at 16220 (list) and 16224 (trace); they remain distinct and untouched.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression-test edits, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; pre-existing modifications preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first stable diagnostics are the five C2065 constants above; later C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean; generated compatibility patch byte-matches complete nested diff.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before source changes. Keep the later C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 09:18 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, overwrite of unrelated changes, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c state was force-checked and remains successful, but is not the active frontier. The first blocker is still the five loader-search identifiers in posixmodule.c; no implementation slice was safe because the Win9x-visible exported API contract remains unresolved.

Forced fresh source-list probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), with subsequent errors at 16220 (list) and 16224 (trace). No source/test changes or coding-agent delegation were appropriate for this diagnostic-only run.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression-test edits, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; pre-existing modifications preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first stable errors are the five C2065 constants above; distinct later C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean; generated compatibility patch byte-matches complete nested diff.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence, then add a focused failing test before source changes; leave later C89 diagnostics distinct.

Previous revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 05:09 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved existing outer and nested changes; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state was freshly confirmed but is not the active frontier. The active first blocker remains five missing loader-search constants in posixmodule.c; because these are exported os constants and the Win9x-visible contract remains unresolved, made no speculative source/test edits and did not delegate implementation.

Forced fresh VC6 source-list probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by line 16220 (list) and 16224 (trace); not addressed.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression tests, and nested CPython edits remain preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; pre-existing modifications preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled; first stable diagnostics are the five C2065 errors listed above; subsequent C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff clean; generated compatibility patch byte-matches the complete nested diff; outer non-generated diff clean.

Previous revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 03:02 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before acting. Preserved all outer and nested changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true but is not the active frontier. A forced fresh probe confirms the first blocker remains five missing LOAD_LIBRARY_SEARCH_* identifiers in posixmodule.c; no API-contract decision or source/test edit was made, and no coding subagent was appropriate for diagnostic-only work.

Probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), with subsequent errors at 16220 (list) and 16224 (trace).

Files changed this run: PORT_STATUS.md only. Existing generated compatibility patch, frontier regression test, and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; pre-existing changes preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; timestamp `2026-09-28 03:02 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first stable diagnostics are the five C2065 errors listed above; distinct C89 errors follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	Each returned 0; nested diff clean, generated compatibility patch matches complete nested diff byte-for-byte, outer non-generated diff clean.

Previous revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 00:00 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before acting. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c source still compiles and is not the active frontier. No implementation or coding subagent was appropriate because the current blocker requires resolving the Win9x-visible contract for five exported loader-search constants; no authoritative new evidence or safe defect-family slice was established.

Forced fresh VC6 probe again compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later, separate C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by errors at 16220 (list) and 16224 (trace). No source or test changes were made.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, regression script changes, and nested CPython edits were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; prior local modifications preserved; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first diagnostics are the five C2065 constants above; distinct C89 diagnostics follow.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence, then add a focused failing test before source changes. Keep later C89 diagnostics separate.

Previous revision (forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 22:58 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c source is still successful and not the active frontier. No implementation slice was safe because the first blocker is still the unresolved Win9x-visible contract for five exported loader-search constants; no speculative source or test edits were made.

Forced fresh VC6 probe result: 39/40 sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by 16220 (list) and 16224 (trace); left distinct and untouched.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, regression script changes, and nested CPython edits were preserved.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first errors are the five C2065 constants above; distinct C89 diagnostics follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline unchanged: `v3.11.16`, `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean and generated patch matches complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence, then add a focused failing test before changing source. Keep the later C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 20:54 UTC

Read PORT_STATUS.md, README.md, and the supplied legacy-toolchain instructions before probing. The active-profile reference file was absent from both expected skill paths; the complete porting instructions were provided in the task. Preserved all existing outer and nested work; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c remains compilable but is not the active frontier. No source/test edit or coding subagent was appropriate: first stable blocker remains the unresolved Win9x-visible API contract for five exported loader-search constants.

Forced fresh compiler probe: 39/40 listed sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later, separate C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), with further errors at 16220 (list), 16224 (trace), and C2059 at 16246. The API-contract decision is still unsupported by evidence; no fallback values or export changes were guessed.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, regression script, and nested CPython changes were preserved.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, including `_blake2/blake2s_impl.c`; first diagnostics are the five C2065 errors above; subsequent C89 errors remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all syntax checks and applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer whitespace checks passed; generated compatibility patch matches the complete nested diff byte-for-byte.
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git status --short --branch`	0; baseline/tag unchanged and pre-existing modifications preserved.

Previous revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 18:50 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true but is not the active frontier. No implementation subagent or source edit was appropriate: the current first blocker remains a Win9x-visible API-contract decision for five exported loader-search constants, not a defect family with a safe implementation established by evidence.

Forced a fresh compiler probe: 39/40 listed sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct subsequent C89 errors begin at posixmodule.c(16173) (PyObject ScandirIteratorType), followed by line 16220 (PyObject list), line 16224 (trace), and C2059 at 16246. No source or test change was safe without deciding the exported API contract.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, frontier regression script, and nested CPython changes were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; pre-existing modifications preserved; baseline/tag unchanged.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, including `_blake2/blake2s_impl.c`; first stable errors are the five C2065 loader-search constants above; later distinct C89 errors remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer whitespace checks passed; compatibility patch byte-matches the complete nested diff.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence; then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Previous revision (forced fresh VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 16:46 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c compile state remains true but is not the active frontier. No implementation subagent was appropriate because the active blocker remains an unresolved Win9x-visible API contract.

Forced a fresh compiler probe: 39/40 listed sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. The first stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Subsequent separate C89 diagnostics begin at posixmodule.c(16173) (PyObject ScandirIteratorType), continue at 16220 (PyObject list) and 16224 (trace); the transcript also reports C2059 at 16246. No source or test change was safe without determining the intended Win9x-visible contract for the five exported constants.

Files changed by this run: PORT_STATUS.md only. Existing changes to the compatibility patch, frontier regression script, and nested CPython sources were preserved.

Exact commands and results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && git status --short --branch`	0; baseline/tag unchanged; all existing modifications preserved.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, including `_blake2/blake2s_impl.c`; first stable errors are the five C2065 loader-search constants above, followed by separate C89 errors.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff clean, generated compatibility patch byte-for-byte matches complete nested diff, and outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish authoritative behavior for these five exported loader-search constants on Win9x; then write a focused failing test before any source edit. Keep the separate C89 diagnostics distinct.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 10:34 UTC

Read PORT_STATUS.md, README.md, and the active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and nested work; no reset, clean, stash, discard, overwrite, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The _blake2/blake2s_impl.c source remains passing but is not the active frontier. No implementation subagent was appropriate because the first blocker remains an unresolved Win9x-visible API contract for five exported loader-search constants.

Forced a fresh probe: 39/40 listed sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then 16220 (PyObject list) and 16224 (trace). No speculative source or test change was safe.

Files changed by this run: PORT_STATUS.md only. Existing modifications to the generated compatibility patch, frontier regression script, and nested CPython sources were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; pre-existing changes preserved; baseline/tag unchanged.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first diagnostics are the five C2065 errors above; later C89 errors start at line 16173.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested whitespace check passed, generated compatibility patch matches complete nested diff byte-for-byte, and outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence; then add a focused failing test before changing source. Keep subsequent C89 diagnostics separate.

Previous revision (forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 08:27 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before acting. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c compile state remains true, but it is not the active frontier. No implementation subagent was appropriate: the current blocker is still the unresolved Win9x-visible contract for exported loader-search constants.

Forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then 16220 (PyObject list) and 16224 (trace). No source/test implementation was safe; this run was diagnostic-only.

Files changed by this run: PORT_STATUS.md only. Existing changes to the generated compatibility patch, frontier regression script, and nested CPython checkout were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; existing modifications preserved, baseline/tag unchanged, nested diff clean and tracked patch matches complete nested diff byte-for-byte.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, including `_blake2/blake2s_impl.c`; first diagnostics are the five C2065 constants above; later C89 errors start at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence; then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 06:26 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing outer modifications and the nested CPython port diff; no reset, clean, stash, discard, overwrite, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c compile state remains true, but it is not the active frontier. No implementation/coding subagent was appropriate: the first blocker remains a Win9x-visible API contract decision for exported constants, with no authoritative choice established.

Forced fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then 16220 (PyObject list) and 16224 (trace). No source or test implementation was safe; this run was diagnostic-only.

Files changed by this run: PORT_STATUS.md only. Existing changes to the generated compatibility patch, frontier regression script, and nested CPython checkout were preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled; `_blake2/blake2s_impl.c` compiled; first diagnostics are the five C2065 constants above; later C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean and generated patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence; then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Latest revision (forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 04:22 UTC

Read PORT_STATUS.md, README.md, and the active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c remains compilable but is not the active frontier. A forced fresh probe reconfirmed the first stable blocker; no source/test implementation was safe. One coding subagent was requested per workflow but failed before launch because the delegation runtime requires the unavailable anthropic package. This was diagnostic-only.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then 16220 (PyObject list) and 16224 (trace). No unresolved Win9x-visible API contract was guessed.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, frontier regression script, and nested CPython modifications were preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first diagnostics are the five C2065 constants above; later C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; baseline/tag unchanged; nested diff clean and generated patch matches it byte-for-byte.
Coding subagent delegation	Failed before launch: missing `anthropic` package; no child ran.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier remains resolving the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence. Keep later C89 diagnostics separate.

Latest revision (forced VC6 frontier confirmation; Win32 loader-search constants remain blocker)

Date: 2026-09-27 02:15 UTC

Read PORT_STATUS.md, README.md, and the active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and nested changes. No reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c compile state remains true, but is not the active frontier. Fresh forced probe confirmed the recorded first blocker. No source/test edit or coding-agent delegation was appropriate: the five missing constants are exported by Windows os, and selecting fallback values or suppressing exports requires resolving the Win9x-visible API contract.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by line 16220 (PyObject list) and line 16224 (trace); not addressed.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, frontier regression tests, and nested CPython modifications were preserved. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first stable errors are the five C2065 constants above; subsequent C89 errors begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && git status --short --branch`	0; baseline/tag unchanged; pre-existing outer and nested modifications preserved.

Next frontier: resolve the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence. If established, add a focused failing test before a narrow source change; keep the later C89 diagnostics separate.

Latest revision (scheduled fresh VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-26 22:07 UTC

Read this status, README.md, and the active-profile legacy-toolchain reference before work. Preserved all existing outer changes and nested CPython edits; no reset, clean, stash, discard, commit, push, or publication. The recorded _blake2/blake2s_impl.c state was rechecked via forced fresh probe and remains true; it compiles but is not the active frontier. No source implementation was appropriate because the first blocker remains the unresolved Win9x-visible contract for five exported Windows loader-search constants. No coding subagent was launched for this diagnostic-only run.

The forced probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable errors remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (PyObject list) and 16224 (trace). These remain outside this diagnostic slice.

Files changed by this run: PORT_STATUS.md only. Existing generated compatibility patch, frontier regression test, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; existing modifications preserved; CPython remains `v3.11.16`, commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; timestamp 2026-09-26 22:07 UTC.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled; `_blake2/blake2s_impl.c` compiled; first stable errors are the five C2065 constants above.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence; then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Date: 2026-09-26 20:06 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before work. Preserved all existing outer modifications and nested CPython port edits; no reset, clean, stash, discard, commit, push, or publication. The requested _blake2/blake2s_impl.c slice was not changed: a forced fresh probe confirmed it compiles, while the actual first blocker remains in posixmodule.c. Since the five loader-search constants are exported through the Windows os module and their Win9x-visible API contract remains unresolved, this run was diagnostic-only; no implementation subagent or source/test edit was appropriate.

Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The forced source-list probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable errors are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then 16220 (PyObject list) and 16224 (trace); they remain outside this diagnostic slice.

Files changed by this run: PORT_STATUS.md only. Pre-existing modifications to the generated compatibility patch, frontier regression test, and nested CPython sources were preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first errors are the five C2065 loader-search constants above; subsequent distinct C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff is clean and generated compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence, then add a focused failing test before any source edit; keep later C89 diagnostics separate.

Read this status, README.md, and the active-profile CPython/Win9x/MSVC6 reference before work. Preserved the existing outer modifications to this status, the generated compatibility patch, and the frontier regression test, plus all nested CPython edits. No reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. A forced fresh source-list probe confirmed the recorded _blake2/blake2s_impl.c compile state, but it is not the active frontier. No implementation subagent or source edit was appropriate: first blocker remains unresolved loader-search constants whose intended Win9x-visible API contract is not established.

The fresh probe compiled 39/40 sources. _blake2/blake2s_impl.c compiled. First stable errors remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (PyObject list) and 16224 (trace); these were not treated as the active blocker.

Files changed by this run: PORT_STATUS.md only. Existing changes to the compatibility patch, frontier test, and nested CPython checkout remain preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `total=40 compiled=39 cached=0 skipped=0`; `_blake2/blake2s_impl.c` compiled. First errors are the five C2065 loader-search constants above; later C89 diagnostics start at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression checks passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline `v3.11.16`, commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean and compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: resolve the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence, then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Read this status, README.md, and the active-profile CPython/Win9x/MSVC6 reference before work. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. A forced fresh source-list probe confirmed the recorded _blake2/blake2s_impl.c compile state but it is not the active frontier. No coding subagent or implementation was appropriate because the first blocker is unchanged and still requires a deliberate Win9x-visible API contract.

The probe compiled 39/40 listed sources. _blake2/blake2s_impl.c compiled. First stable errors remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89 diagnostics begin at line 16173. No fallback values or export changes were guessed.

Files changed by this run: PORT_STATUS.md only. Existing modifications to the compatibility patch, frontier test, and nested CPython checkout remain preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `total=40 compiled=39 cached=0 skipped=0`; `_blake2/blake2s_impl.c` compiled. First errors are the five C2065 loader-search constants above; later C89 diagnostics start at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression checks passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline `v3.11.16`, commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean and compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: resolve the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence, then add a focused failing test before any source edit. Keep the later C89 diagnostics separate.

Latest revision (fresh VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-26 11:51 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before work. Preserved all existing top-level and nested modifications. No reset, clean, stash, discard, commit, push, or publication. The requested _blake2/blake2s_impl.c sequence was not attempted as an edit because the status-directed fresh probe confirms it already compiles; the active frontier remains posixmodule.c.

A forced fresh source-list probe compiled 39/40 sources. _blake2/blake2s_impl.c compiled. First stable errors remain five C2065 undeclared identifiers at posixmodule.c(15856)–(15860): LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173. These are exported os constants; choosing fallback values or suppressing exports would alter Win9x-visible API behavior. No authoritative contract was established in this run, so no production/test change was safe and no coding subagent was delegated. This run was diagnostic-only.

Files changed by this run: PORT_STATUS.md only; all pre-existing changes to this file, the compatibility patch, frontier test, and nested CPython checkout were preserved.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `total=40 compiled=39 cached=0 skipped=0`; `_blake2/blake2s_impl.c` compiled. First errors are the five C2065 constants above; later C89 errors start at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax checks and all listed applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline remains `41388c9cb160d0886d5ca00d2e6c878260a8a4549`, tag `v3.11.16`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff is clean and generated patch matches it byte-for-byte.
`git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next step: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence; then add a focused failing test before any source edit. Keep the later C89 diagnostics separate.

Latest revision (fresh frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-26 09:47 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved the existing outer modifications to this file, the generated compatibility patch, and the frontier regression test; preserved all nested CPython edits. No reset, clean, stash, discard, commit, push, or publication.

The status-directed _blake2/blake2s_impl.c sequence was checked by a forced fresh source-list probe. It still compiles, but is not the active frontier: 39/40 sources compile. The first stable blocker remains five C2065 diagnostics at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. C89 errors start later at line 16173. Since the five names are exported os constants and no evidence resolves the intended Win9x-visible contract, no source/test implementation or coding-agent delegation was appropriate; this run was diagnostic-only.

Files changed by this run: PORT_STATUS.md only. Existing modifications were preserved.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0; `_blake2/blake2s_impl.c` compiled. First diagnostics are the five C2065 loader-search constants above; subsequent C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable checks and regression suites passed (`ALL TESTS PASSED`).
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	`41388c9cb160d0886d5ca00d2e6c878260a8a4549`, tag `v3.11.16`; unchanged.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff is clean and generated compatibility patch matches it byte-for-byte.
`git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence, then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Prior revision (fresh frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-26 07:43 UTC

Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. The reference was found and read under the active profile at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md; it is absent at the default-profile path. Preserved the existing outer modifications to PORT_STATUS.md, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and scripts/vc6-probe-pythoncore-frontier.test.sh, as well as all nested CPython work. No reset, clean, stash, discard, commit, push, or publication.

Forced a fresh source-list probe before considering implementation. _blake2/blake2s_impl.c compiles; 39/40 sources compile. The first stable blocker remains five C2065 diagnostics in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89 diagnostics begin at line 16173. This matches the recorded frontier. The five names are exposed as Windows os constants; choosing values or omitting exports would alter the Win9x-visible API contract, still unresolved by available evidence. No safe implementation slice or suitable failing test was identified, so this run was diagnostic-only and no coding subagent was delegated.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0; `_blake2/blake2s_impl.c` compiled. First errors are the five C2065 constants above; later C89 errors begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites and syntax checks passed (`ALL TESTS PASSED`).
`date -u '+%Y-%m-%d %H:%M UTC'; git status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; existing outer changes preserved; nested diff check and complete-patch byte comparison passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: resolve the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence, then add a focused failing test before any source edit. Keep the later C89 diagnostics separate.

Prior revision (forced frontier re-probe; Win32 loader-search constants remain first blocker)

Date: 2026-09-26 05:38 UTC

Before probing, read PORT_STATUS.md and README.md. The requested reference file legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md is not installed in the active profile at the expected path; followed the complete legacy-toolchain instructions supplied for this run. Preserved pre-existing outer changes to PORT_STATUS.md, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and scripts/vc6-probe-pythoncore-frontier.test.sh; nested CPython work was left intact. No reset, clean, stash, discard, commit, push, or publication.

Forced a fresh probe before choosing work. The _blake2/blake2s_impl.c sequence is not the active frontier: it compiles. Result remains 39/40 sources; the first stable blocker is five C2065 errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later C89 diagnostics start at line 16173. The five values are Win32 loader-search constants exported by the os module; defining values or dropping those exports would alter Win9x-visible API behavior, and the available evidence does not establish which behavior is intended. No safe TDD implementation slice was identified, so this run was diagnostic-only and no coding agent was delegated.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0. `_blake2/blake2s_impl.c` compiled. First errors are the five C2065 loader-search constants above; later C89 errors begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax validation and every listed applicable regression suite passed (`ALL TESTS PASSED`).
`git status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; outer local modifications preserved; nested baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; nested whitespace check and byte-for-byte patch reproducibility check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x-visible API contract for the five loader-search constants, then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Prior revision (forced frontier re-probe; Win32 loader-search constants remain first blocker)

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before probing. The attempted coding-agent delegation failed before launch because the runtime lacks the required anthropic package; no child ran. Preserved all pre-existing work: outer modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier regression script; detached cpython/ checkout remains extensively modified at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

The recorded _blake2/blake2s_impl.c state remains true but is not the active frontier. A forced fresh source-list probe compiled 39/40 listed sources, including _blake2/blake2s_impl.c. First stable blocker remains five C2065 errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 errors begin at line 16173. These five names are Win32 loader-search constants exported into os; assigning fallback values or dropping exports would decide Win9x-visible API behavior, unsupported by current evidence. No source/test edit was safe; this run was diagnostic-only. The agent delegation prerequisite failed as noted above.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0. `_blake2/blake2s_impl.c` compiled. First five errors are C2065 for the constants above; later C89 errors at `posixmodule.c(16173)` and onward.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; existing three outer modifications preserved; baseline is `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested whitespace check, patch reproducibility comparison, and outer whitespace check passed.
Coding-agent delegation via `delegate_task`	Failed before launch: runtime error, missing `anthropic` package. No independent review or child implementation.

This remains compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x-visible contract for the five loader-search constants with authoritative API evidence; then write a focused failing test before any source change. Keep the later C89 blocker separate.

Prior revision (forced frontier re-probe; Win32 loader-search constants remain first blocker)

Date: 2026-09-25 21:26 UTC

Before probing, read this status, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing work: outer modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier regression script; detached cpython/ checkout remains extensively modified at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Forced a fresh source-list probe before deciding whether the recorded _blake2/blake2s_impl.c slice was still current. It compiles; 39 of 40 listed sources compile. The first stable blocker remains five C2065 errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate C89 diagnostics begin at line 16173. No implementation slice is safe without deciding the Win9x-visible behavior of the five exported os constants; no speculative edit or coding-agent delegation was appropriate. This run changed only this status entry.

Exact commands and results:

Command	Exit/result

| WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh | 2; 39/40 sources compiled, including _blake2/blake2s_impl.c; first five C2065 diagnostics are the constants listed above; later C89 family begins at posixmodule.c(16173). | | bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; shell syntax and all applicable regression suites passed (ALL TESTS PASSED for each). | | git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch' | 0; baseline commit/tag unchanged, nested diff clean, generated patch matches the full nested diff byte-for-byte, outer non-generated diff clean. |

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x behavior/API contract for the five exported loader-search constants, then add a focused failing regression before any source change. Keep later C89 diagnostics separate.

Latest revision (forced frontier re-probe; Win32 loader-search constants remain first blocker)

Date: 2026-09-25 19:22 UTC

Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all pre-existing changes: outer modifications to this status, the generated compatibility patch, and the frontier regression script; detached cpython/ checkout remains extensively modified at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Forced a fresh source-list probe. _blake2/blake2s_impl.c still compiles, as do 39 of 40 listed sources. The first stable blocker remains five C2065 errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later C89 diagnostics begin at line 16173 and remain a separate family. No source change was safe: these values are exposed as Windows os module constants, and choosing numeric fallbacks or dropping the exports changes Win9x-visible API behavior not established by available evidence. This run was diagnostic-only; no coding agent was delegated because implementation was not appropriate.

Files changed in this run: PORT_STATUS.md only. All existing nested CPython edits and generated patch were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git rev-parse HEAD && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; outer modifications preserved; nested checkout detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 sources compiled, including `_blake2/blake2s_impl.c`. First five C2065 diagnostics are the loader-search constants above; later distinct C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax checks and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff check passed, compatibility patch matches the complete nested diff byte-for-byte, and non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x behavior/API contract for the five exported loader-search constants; only then add a focused failing test before any source change. Keep the later C89 diagnostics separate.

Latest revision (diagnostic-only fresh frontier confirmation)

Date: 2026-09-25 UTC

Read this status, README.md, and the CPython/Win9x/MSVC6 reference before work. Preserved all pre-existing modifications: outer checkout edits to this file, the generated compatibility patch, and the frontier regression script; the detached cpython/ checkout remains extensively modified. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Re-forced the source-list probe before choosing implementation. _blake2/blake2s_impl.c still compiles, as do 39 of 40 listed sources. The first stable blocker remains five C2065 undeclared-identifier errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. The module code exports these as _LOAD_LIBRARY_SEARCH_* integer constants. No authoritative local SDK definition or additional evidence resolving whether/how these constants should be exposed was found; assigning fallback values or removing exports remains an API-contract decision, so no speculative source edit was made. Later C89 diagnostics beginning at line 16173 remain a separate blocker. This run was diagnostic-only; no coding subagent was delegated.

Files changed in this run: PORT_STATUS.md only. Existing CPython edits, regression script, and generated compatibility patch were preserved.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiles; total=40, compiled=39, cached=0, skipped=0. First stable diagnostics are the five C2065 errors listed above. Additional C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff whitespace check passed, compatibility patch matches the complete nested diff byte-for-byte, and non-generated outer diff check passed.

Compiler-probe progress only. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: resolve the intended Win9x os API contract for these five exported loader-search constants using authoritative Windows SDK/API evidence; then write a focused failing test before any source change. Keep the later C89 diagnostics separate.

Latest revision (diagnostic-only forced frontier re-probe; loader-search constants remain first blocker)

Date: 2026-09-25 09:03 UTC

Latest revision (forced frontier re-probe; Win32 loader-search constants remain first blocker)

Date: 2026-09-25 UTC

Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all existing changes: the outer checkout already had modifications to PORT_STATUS.md, the generated CPython compatibility patch, and the frontier regression script; the detached cpython/ checkout contains extensive local edits. CPython remains baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

The status-directed _blake2/blake2s_impl.c sequence was re-evaluated with a forced fresh source-list probe before implementation. The recorded compile state remains true, but it is not the active frontier: 39/40 sources compile, and the first stable blocker remains five C2065 undeclared-identifier errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Source inspection confirms these values are exported as _LOAD_LIBRARY_SEARCH_* from the Windows os module initialization block. Assigning fallback values or omitting exports would decide Win9x-visible API behavior; available evidence does not establish that contract, so no speculative compatibility edit was made. Later C89 diagnostics beginning at line 16173 remain a distinct subsequent blocker. No coding agent was delegated because this run was diagnostic-only.

Files changed in this run: PORT_STATUS.md only. Existing nested CPython edits, the generated compatibility patch, and regression script were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; outer pre-existing changes preserved; nested checkout detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiles; 39/40 sources compiled. First diagnostics are the five C2065 errors at `posixmodule.c(15856)`–`(15860)` listed above. Distinct later C89 diagnostics begin at line 16173.
`rg -n -C 4 'LOAD_LIBRARY_SEARCH_(DEFAULT_DIRS	APPLICATION_DIR

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x behavior of the five exported loader-search constants before adding a focused failing test and changing source; then address later C89 diagnostics separately.

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved the existing outer modifications to PORT_STATUS.md, the generated compatibility patch, and frontier test; the detached cpython/ checkout also contains extensive local port edits. No reset, clean, stash, discard, commit, push, or publication occurred. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Forced a fresh source-list compiler probe. The recorded _blake2/blake2s_impl.c state remains true, but it is not the active blocker: 39/40 listed sources compile. The first stable diagnostics remain five C2065 undeclared-identifier errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Inspection confirms these are exported as _LOAD_LIBRARY_SEARCH_* constants in the Windows os module initialization block. Defining fallback values or omitting exports changes the Win9x-visible API contract, which remains unresolved; no speculative source/test changes or coding-agent delegation were appropriate. Later C89 diagnostics start at line 16173 and remain a separate blocker. This run was diagnostics-only.

Files changed by this run: PORT_STATUS.md only. All existing nested CPython edits and generated patch were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; outer checkout already had the three modified files; nested checkout is detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`, with pre-existing port edits.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 sources compiled. First stable errors are the five C2065 constants above. Distinct later C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax checks and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested whitespace check passed and compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x API behavior for the five exported loader-search constants; only then add a focused failing test before changing source. Keep the later C89 diagnostics separate.

Latest revision (diagnostic-only forced frontier re-probe)

Date: 2026-09-25 06:58 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved the pre-existing outer modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier test; the detached cpython/ checkout also contains extensive local port edits. No reset, clean, stash, discard, overwrite of unrelated changes, commit, push, or publication occurred. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

Re-forced the current compiler frontier before considering implementation. The recorded _blake2/blake2s_impl.c state remains true, but it is not the current blocker: 39/40 listed sources compile. The first stable blocker remains five C2065 undeclared-identifier diagnostics in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later distinct C89 diagnostics begin at line 16173. Inspection confirms these names are exported as _LOAD_LIBRARY_SEARCH_* constants from the Windows os module initialization block. Adding numeric values or omitting exports would make a Win9x-visible API behavior choice that the available evidence does not resolve. Per scope, this run therefore performed diagnostics only; no coding agent or implementation/test edit was appropriate.

Files changed by this run: PORT_STATUS.md only. Existing CPython changes and generated patch were left intact.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git rev-parse --show-toplevel && git rev-parse HEAD && git remote -v`	0; outer checkout on `main...gitea/main` with the three pre-existing modified files; no publication performed.
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; nested checkout remains detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`, with pre-existing source edits.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 sources compiled. First stable errors are the five C2065 loader-search constant errors at `posixmodule.c(15856)`–`(15860)`. Later distinct C89 errors start at 16173.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed.
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	Each check returned 0; nested whitespace check passed, generated patch matches the complete nested diff byte-for-byte, and non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: resolve the intended Win9x behavior/API contract for the five exported loader-search constants; only then write a focused failing regression test before any source change. Keep the later C89 diagnostics separate.

Latest revision (forced frontier re-probe; loader-search constants remain first blocker)

Date: 2026-09-25 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. The outer checkout already had modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier regression script; the detached cpython/ checkout had extensive local port edits. Preserved all prior state. Baseline is still tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Forced a fresh source-list probe before implementation. The recorded _blake2/blake2s_impl.c compile state is still true, but _blake2 is not the current blocker: 39/40 sources compile, and the first stable blocker is posixmodule.c with five C2065 errors at lines 15856–15860 for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. The later C89 errors beginning at line 16173 are distinct and remain untouched. Since these constants are exported through the Windows os module and their intended Win9x-visible behavior remains unresolved, implementation would be speculative. Therefore this run was diagnostic-only; no coding agent or source/test edit was appropriate.

Files changed by this run: PORT_STATUS.md only. The existing compatibility patch and all nested source changes were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; pre-existing local modifications preserved; CPython remains detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 sources compiled, including `_blake2/blake2s_impl.c`. First stable diagnostics: five C2065 loader-search constants at `posixmodule.c(15856)`–`(15860)`; distinct later errors start at 16173.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\home\\ubuntu\\Organized\\Legacy-Ports\\Projects\\python-win9x\\MSVC600\\VC98\\Bin\\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: determine and document intended Win9x behavior for these five loader-search constants, then add a focused failing test before any source edit. Keep the later C89 diagnostics separate.

Latest revision (diagnostic-only confirmation of Win32 loader-search constants frontier)

Date: 2026-09-25 00:46 UTC

Baseline verified as CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read this status, README.md, and the legacy-toolchain reference before probing. The outer checkout already contained local modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier regression script; the detached cpython/ checkout already contained extensive port edits. Preserved all prior state. No reset, clean, stash, discard, commit, push, or publication occurred. The exact compiler banner was re-verified as Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine.

The recorded mathmodule frontier was not current: a forced fresh source-list probe still compiled _blake2/blake2s_impl.c but found posixmodule.c as the first blocker, with 39 of 40 sources compiling. First stable diagnostics are five C2065 errors at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Inspection confirms these are exported as _LOAD_LIBRARY_SEARCH_* constants from the Windows os module initialization block. Defining arbitrary fallback values or omitting these exports changes the Win9x-visible API surface, and the intended contract is not established by the available evidence. Therefore this run made diagnostics only; no implementation or coding-agent delegation was appropriate. Later C89 diagnostics (first at line 16173) are separate and remain untouched.

Files changed by this run: PORT_STATUS.md only. No CPython source, test, or compatibility patch was modified in this run.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; pre-existing changes preserved; CPython detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 sources compiled. First stable diagnostics are the five C2065 loader-search constants at `posixmodule.c(15856)`–`(15860)`; later C89 diagnostics follow.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\home\ubuntu\Organized\Legacy-Ports\Projects\python-win9x\MSVC600\VC98\Bin\VCVARS32.BAT && cl'`	0; verified compiler banner as stated above.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff check passed, generated compatibility patch reproduces the full nested diff byte-for-byte, and non-generated outer diff check passed.

Compiler-probe progress only. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next step: establish the intended Win9x os API behavior for the five Windows-7-era loader-search constants, then add a focused failing test before any source change. Preserve the later C89 diagnostics as separate frontiers.

Port Status — CPython 3.11.16 to Windows 98 SE

Latest revision (diagnostic-only confirmation of loader search constants frontier)

Date: 2026-09-24 22:41 UTC

Baseline verified as CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read this status, README.md, and the active-profile legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. The outer checkout already contained modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier test; the detached cpython/ checkout had extensive local modifications. Preserved all existing work; no reset, clean, stash, discard, commit, push, or publication occurred. MSVC6 remains external/local-only.

Force-re-probed the recorded frontier before any implementation. The state remains true: _blake2/blake2s_impl.c compiled and the source-list probe compiled 39 of 40 sources. First stable diagnostics remain the five C2065 errors at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. The subsequent C89 errors beginning at line 16173 are later, distinct blockers. The loader flags are exported in the Windows os module initialization, so choosing fallback numeric constants versus omitting API exports changes the Win9x-visible behavior. No source/test/patch implementation was appropriate absent a resolved API contract; no coding agent was delegated for this diagnostic-only run.

Files changed by this run: PORT_STATUS.md only. No CPython source, regression test, or generated compatibility patch was modified.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; outer pre-existing modifications preserved; detached CPython checkout at baseline commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549`, tag `v3.11.16`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 compiled. First errors are the five loader-search constants at `posixmodule.c(15856)`–`(15860)`; later C89 diagnostics follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff check passed, generated patch still reproduces complete nested diff byte-for-byte, and non-generated outer diff check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next step remains resolving the intended Win9x os API behavior for these Windows-7-era loader flags and then writing a focused failing test before changing source. Keep later C89 diagnostics separate.

Latest revision (diagnostic-only loader search constants frontier)

Date: 2026-09-24 20:37 UTC

Baseline verified as CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. The outer checkout already had modifications to PORT_STATUS.md, the generated compatibility patch, and the frontier test; the detached cpython/ checkout had extensive local modifications. Preserved all existing work. No reset, clean, stash, discard, commit, push, or publication occurred. The legacy compiler remains external/local-only.

The previously recorded frontier was force-re-probed and remained true: _blake2/blake2s_impl.c compiled and the probe compiled 39 of 40 listed sources. First stable diagnostics are in posixmodule.c lines 15856–15860: C2065 for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Source inspection shows these are exported as os module constants in the MS_WINDOWS module-init block. Unlike an isolated compile-time spelling, deciding whether to define numeric fallback values or omit these exports changes the Win9x-visible API contract; no behavior choice was made without runtime evidence. Later C89 diagnostics beginning at 16173 are separate and were not addressed. No implementation slice or coding-agent delegation was appropriate until the API behavior is resolved; this run was diagnostics only.

Files changed by this run: PORT_STATUS.md only. No CPython source, regression test, or compatibility patch was modified.

Exact commands and results:

Command	Exit/result
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; detached checkout at baseline commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549`, tag `v3.11.16`, with pre-existing modified source files.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 sources compiled. First errors are the five C2065 loader-search constants at `posixmodule.c(15856)`–`(15860)`; later C89 diagnostics follow.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites passed.
`cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; tracked compatibility patch still exactly reproduces the full nested diff.
`git -C cpython diff --check`	0.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next step: establish an explicit intended os API behavior for these Windows-7-era loader flags on Win9x, then add a focused regression test before any source change. Preserve the later C89 blocker as a separate frontier.

Latest revision (VC6 wait-status C89 declaration slice)

Date: 2026-09-24 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read this status, README.md, and the active-profile legacy-toolchain reference. Existing outer modifications to this status, generated compatibility patch, and frontier test were preserved; the detached cpython/ checkout also contained extensive local edits. No reset, clean, stash, discard, commit, push, or publication occurred. A single focused coding-agent delegation was attempted and could not launch because the runtime lacks the anthropic package; this slice was completed directly, without claiming independent review.

The recorded frontier was force-re-probed before editing and remained true: _blake2/blake2s_impl.c compiled and 39/40 listed sources compiled. First blocker remained posixmodule.c(15107) C2143 (missing ';' before 'type') for the post-statement exitcode declaration; C2065 for exitcode at 15110 and parser cascades followed. Following TDD, updated the focused Windows wait-status assertion first and ran the regression script against unchanged production code; expected RED, exit 1, at the assertion that the opening C89 declaration group was missing. Hoisted only unsigned PY_LONG_LONG status and exitcode to the Windows branch's declaration group; kept both initializations at their original evaluation points. Adjusted the assertion to extract the full conditional function and verify declaration placement and conversion/error order. Focused test then passed GREEN. Two intermediate assertion-harness runs exposed extraction/expected-text mismatches; corrected the test only, with no further production changes.

Files changed in this slice:

cpython/Modules/posixmodule.c — declaration ordering in os_waitstatus_to_exitcode_impl() Windows branch only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused declaration/order assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and verified byte-for-byte.
PORT_STATUS.md — this record.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled. First diagnostics `posixmodule.c(15107)` C2143 and `(15110)` C2065 `exitcode`; later cascades.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after assertion edit, before production edit	1; expected RED at the Windows wait-status C89 assertion.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation and assertion correction	0; `ALL TESTS PASSED`.
Forced frontier probe after edit (same command as above)	2; the `exitcode` C2143/C2065 family is gone. New first stable errors are C2065 at `posixmodule.c(15856)`–`(15860)` for `LOAD_LIBRARY_SEARCH_DEFAULT_DIRS`, `...APPLICATION_DIR`, `...SYSTEM32`, `...USER_DIRS`, and `...DLL_LOAD_DIR`. Still 39/40; no later family changed.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax checks and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; complete nested diff matches generated patch byte-for-byte; nested and non-generated outer whitespace checks passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: inspect the LOAD_LIBRARY_SEARCH_* constants at posixmodule.c(15856) and re-probe before deciding a separate narrow slice.

Latest revision (VC6 wait-status 64-bit spelling slice)

Date: 2026-09-24 UTC

Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before editing, read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md under the active Hermes profile. The outer checkout already contained local modifications to this status, the generated compatibility patch, and the frontier regression script. The detached cpython/ checkout had extensive existing port edits. All local state was preserved; no reset, clean, stash, discard, commit, push, or publication occurred. The requested single focused coding-agent delegation was attempted and could not launch because the runtime lacks the anthropic Python package; direct work continued on the single evidenced slice.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed before edits and remained true: that source compiled, with 39 of 40 listed sources compiled. First stable blocker: posixmodule.c(15102), then C2632 at 15103 and 15107 ('long' followed by 'long' is illegal) in os_waitstatus_to_exitcode_impl()'s Windows branch. Following TDD, added an assertion to scripts/vc6-probe-pythoncore-frontier.test.sh and ran it against unchanged source; expected RED, exit 1. Replaced the three unsigned long long type spellings (two declarations and the error-sentinel cast) with unsigned PY_LONG_LONG, preserving unsigned semantics and conversion/return behavior. The focused assertion passed GREEN. No independent review is claimed.

Files changed in this slice:

cpython/Modules/posixmodule.c — VC6-compatible unsigned 64-bit type spellings in os_waitstatus_to_exitcode_impl() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused assertion for the Windows branch type spellings and preserved conversion/result calls.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and byte-compared.
PORT_STATUS.md — this entry.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled; 39/40 compiled. C2632 at `posixmodule.c(15102)`, `(15103)`, `(15107)`; following cascades.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` with new assertion, before source edit	1; expected RED: Windows wait-status conversion lacked the required VC6 spelling.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`, including the new assertion.
Same forced frontier probe after source edit	2; the C2632 long-long diagnostics are gone. New first diagnostic: `posixmodule.c(15107)` C2143 (missing `;` before `type`) for the `exitcode` declaration after the preceding `if`; C2065 at 15110 and parser cascades follow. Separate later `LOAD_LIBRARY_SEARCH_*` SDK constants and later C89 errors remain untouched. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; complete patch byte-matches the nested diff; nested and non-generated outer whitespace checks passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect/re-probe the C89 declaration-order defect at posixmodule.c(15107) (exitcode) and add its focused failing assertion before any source change. Do not combine it with later API constants or unrelated errors.

Latest revision (VC6 DLL-directory API fallback slice)

Date: 2026-09-24 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before editing, read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md (located under the active Hermes profile skills). The outer checkout already had local changes in PORT_STATUS.md, compat/msvc600/cpython-3.11.16-vc6-headers.patch, and scripts/vc6-probe-pythoncore-frontier.test.sh; the detached cpython/ checkout had extensive local port edits. All pre-existing work was preserved. No reset, clean, stash, discard, commit, push, or publication occurred. MSVC600 remains external/local-only through Wine (WINEPREFIX=/home/ubuntu/.wine-win9xport); compiler banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The previously recorded _blake2/blake2s_impl.c frontier was force-re-probed before edits and remained true: it compiled, as did 39 of 40 listed sources. First blocker was posixmodule.c(14905) in typedef DLL_DIRECTORY_COOKIE (WINAPI *PAddDllDirectory)(PCWSTR newDirectory);: C2143 missing ) before __stdcall, C2143 missing { before __stdcall, C2059 at ), and C2165 (left-side modifier); the companion typedef and unavailable API types/functions then cascaded. These are Windows 7 DLL-directory APIs absent on Win9x. The requested one focused coding-agent delegation was attempted, but failed to launch because the runtime lacks Python package anthropic; implementation proceeded directly as a single narrow slice.

Following TDD, the focused regression assertion was added first and run against unchanged production source: expected RED, exit 1 (VC6 os.add_dll_directory fallback missing). The minimal source edit gates the API typedefs and both implementation bodies for MSVC6, returning NotImplementedError from os._add_dll_directory and os._remove_dll_directory; modern compiler paths remain intact. The focused suite then passed GREEN. This explicitly acknowledges the unavailable Win7 functionality rather than inventing compatibility declarations.

Files changed in this slice:

cpython/Modules/posixmodule.c — VC6 guard around DLL-directory function pointer typedefs and explicit unsupported-operation errors in the add/remove implementations.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused structural regression assertion for both functions and the retained modern branch.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and verified byte-for-byte.
PORT_STATUS.md — this entry.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\home\ubuntu\Organized\Legacy-Ports\Projects\python-win9x\MSVC600\VC98\Bin\VCVARS32.BAT && cl'`	0; compiler banner recorded above.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; 39/40 compiled; first diagnostic family at `posixmodule.c(14905)` described above.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding assertion, before source edit	1; expected RED: `VC6 os.add_dll_directory fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`, including add/remove DLL-directory assertion.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after edit	2; `_blake2/blake2s_impl.c` compiled and 39/40 listed sources compiled. DLL-directory diagnostics are gone. New first blocker is `posixmodule.c(15102)` C2632 (`'long' followed by 'long' is illegal`) in `os_waitstatus_to_exitcode_impl()`; further C2632 diagnostics at 15103 and 15107 and their cascades. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; generated patch matches full nested diff byte-for-byte; nested and non-generated outer whitespace checks passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution has been verified. Next narrow frontier: inspect/re-probe os_waitstatus_to_exitcode_impl() at posixmodule.c(15102) for VC6 64-bit spelling/declaration blockers; do not fold later unrelated errors into that slice.

Latest revision (diagnostic-only DLL-directory API frontier)

Date: 2026-09-24 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. The outer checkout already had uncommitted changes to this status, the generated compatibility patch, and the frontier test; the nested cpython/ checkout had extensive local source edits. All pre-existing work was preserved. No reset, clean, stash, discard, commit, push, or publication occurred. MSVC6 is the external Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86, invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed and remained true: that source compiled and 39 of 40 listed sources compiled. First stable diagnostics are at posixmodule.c(14905) for typedef DLL_DIRECTORY_COOKIE (WINAPI *PAddDllDirectory)(PCWSTR newDirectory);: C2143 missing ) before __stdcall, C2143 missing { before __stdcall, C2059 at ), and C2165 (left-side modifier). The immediately following companion typedef at 14906 fails similarly. Subsequent errors identify the absent VC98/Win9x API types and function (DLL_DIRECTORY_COOKIE, AddDllDirectory) at 14928–14929, followed by cascades. Source inspection confirms these helpers dynamically call Windows 7 DLL-directory APIs; Win9x does not provide that API. A safe behavior-preserving local compiler shim is not established: any port fix must explicitly decide the unavailable API's behavior and account for both add/remove helpers and generated module exposure. Therefore this run made diagnostics only rather than a speculative source change. The requested single coding subagent could not launch because the runtime requires the unavailable Python anthropic package; no external coding CLI was used to bypass that failed delegation.

Files changed by this run: PORT_STATUS.md only. No CPython source, test, or compatibility patch was modified in this run.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled, 39/40 sources compiled, first stable error family at `posixmodule.c(14905)` as above; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed.
`git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff whitespace check, patch byte-for-byte comparison, and non-generated outer diff whitespace check passed.

This is compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier requires deciding and testing explicit Win9x behavior for os.add_dll_directory and os.remove_dll_directory; until then, do not mask the compiler errors with invented API declarations.

Latest revision (`os_scandir_impl()` VC6 C89 declaration slice)

Date: 2026-09-24 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. The outer checkout and detached cpython/ checkout already had extensive local changes; all were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. The requested single focused coding subagent could not launch because the runtime requires the unavailable Python anthropic package. Direct implementation followed after confirming the exact frontier. Codex CLI 0.153.4 and authenticated status were verified, but no external coding agent ran; no independent review is claimed.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed first and remained applicable: it compiled; 39 of 40 sources compiled. First stable diagnostics were posixmodule.c(14689) C2275/C2065 for the post-statement PyObject *ScandirIteratorType declaration in os_scandir_impl(). Following TDD, an exact-function assertion was added, then corrected to include the existing clinic marker. With production source still unchanged, the corrected test failed RED (exit 1) specifically because the type local was declared after the audit statement. The minimal source change hoists only PyObject *ScandirIteratorType; into the opening declaration group and changes its original initializer into an assignment at its existing post-audit point. Audit, iterator allocation, and error/cleanup order remain unchanged.

Files changed in this slice:

cpython/Modules/posixmodule.c — C89 declaration ordering in os_scandir_impl() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused exact-function structural assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and verified byte-for-byte.
PORT_STATUS.md — this milestone entry.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled; 39/40 compiled; first diagnostics `posixmodule.c(14689)` C2275/C2065 for `PyObject ScandirIteratorType`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding/correcting assertion, before source edit	1; expected RED: `os_scandir_impl must hoist ScandirIteratorType into its opening C89 declaration group and preserve audit-before-type-lookup order`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; GREEN; all structural checks passed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after edit	2; original 14689 declaration diagnostics are gone; the next distinct first diagnostic is `posixmodule.c(14905)` C2143/C2059/C2165 around `__stdcall` in later DLL-directory API code. Summary `total=40 compiled=39 cached=0 skipped=0`; no later family was changed.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; complete compatibility patch matches the nested diff byte-for-byte; nested and non-generated outer diffs pass whitespace checks.

Compiler-probe progress only: _blake2/blake2s_impl.c and 39/40 listed sources compile, but posixmodule.c still blocks. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect/re-probe the posixmodule.c(14905) __stdcall/DLL-directory diagnostics; do not fold in later independent diagnostics.

Latest revision (`ScandirIterator_dealloc()` VC6 C89 declaration slice)

Date: 2026-09-24 07:52 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. The outer checkout and detached cpython/ checkout already contained local changes; all were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. Codex CLI 0.153.4 was present, but the requested single Hermes coding subagent could not launch because the runtime lacks the anthropic package; no child changes were used. I completed this narrow slice directly and do not claim independent review.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed before editing and remained applicable: it compiled; 39 of 40 sources compiled. The first stable diagnostic family was posixmodule.c(14623) C2275/C2146/C2065 for freefunc free_func in ScandirIterator_dealloc(). Following TDD, the focused assertion was added first and observed RED (exit 1), specifically because the callback declaration followed the finalizer statement. The minimal source change hoists only freefunc free_func; into the opening declaration group and converts its original initializer to an assignment after the finalizer check; finalizer, callback, and decref order is unchanged. The assertion passed GREEN (exit 0).

Files changed in this slice:

cpython/Modules/posixmodule.c — C89 declaration ordering in ScandirIterator_dealloc() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused exact-function structural assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and verified byte-for-byte.
PORT_STATUS.md — this milestone entry.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled; 39/40 compiled; first diagnostics `posixmodule.c(14623)` C2275/C2146/C2065 for `freefunc free_func`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding assertion, before source edit	1; expected RED: assertion that `ScandirIterator_dealloc` must declare `free_func` before statements and preserve finalizer/free/decref order.
Same focused test after source edit	0; GREEN.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after edit	2; the `freefunc` diagnostic family at 14623 is gone. New first stable diagnostics are `posixmodule.c(14689)` C2275/C2065 for `PyObject ScandirIteratorType`; later distinct blockers remain. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; complete compatibility patch matches the nested diff byte-for-byte; nested and non-generated outer diffs pass whitespace checks.

Compiler-probe progress only: _blake2/blake2s_impl.c and 39/40 listed sources compile, but posixmodule.c still blocks. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect/re-probe posixmodule.c(14689) C89 declaration of ScandirIteratorType; do not fold in later API/language diagnostics.

Latest revision (`os_DirEntry_inode_impl()` VC6 64-bit type spelling)

Date: 2026-09-24 05:45 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before edits, inspected this status, README.md, and the requested legacy-toolchain reference path; the reference file was absent from the active/default skills directories and project. The skill instructions supplied in the task were followed. The outer checkout and detached cpython/ checkout had pre-existing local changes, preserved without reset, clean, stash, discard, commit, push, or publication. Codex CLI 0.153.4 was available and used as the single focused coding lane; its scope was limited to posixmodule.c and the frontier test. The CPython tag/commit were unchanged.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed before implementation and remained true: _blake2/blake2s_impl.c compiled; the first stable error family was posixmodule.c(14152) C2632, because VC6 rejects long long in os_DirEntry_inode_impl()'s Windows static_assert. The child confirmed the existing Windows PY_LONG_LONG definition resolves to __int64 and matches the unsigned type accepted by PyLong_FromUnsignedLongLong. Following TDD, the focused assertion covering both Windows/POSIX inode static_asserts was added first and observed RED (exit 1). The minimal source edit changed only the two asserted type spellings from unsigned long long to unsigned PY_LONG_LONG; the runtime return expressions and diagnostic strings are unchanged. The focused assertion then passed GREEN (exit 0).

Files changed in this slice:

cpython/Modules/posixmodule.c — two os_DirEntry_inode_impl() compile-time assertion type spellings.
scripts/vc6-probe-pythoncore-frontier.test.sh — assertion requires unsigned PY_LONG_LONG in both branches and updates the exact-function expectation.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested diff and compared byte-for-byte.
PORT_STATUS.md — this milestone entry.

Exact commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; 39/40 compiled; `_blake2/blake2s_impl.c` compiled; first stable diagnostic `posixmodule.c(14152)` C2632 (`'long' followed by 'long' is illegal`), with later separate blockers.
Focused inode assertion before source edit (`bash /tmp/direntry-inode-tdd/run-focused.sh`, coding lane)	1; expected RED: `AssertionError: DirEntry.inode static_asserts must both use unsigned PY_LONG_LONG`.
Same focused inode assertion after source edit (coding lane)	0; `ok - DirEntry.inode preserves C89 declarations and decoder/stat/errno/cleanup order`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh` (coding lane)	0.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all structural checks passed, including both inode assertions. Its bounded live integration check compiled the first source, `getpath.c`, successfully; it is not the full frontier probe.
Fresh forced frontier probe after edit, with output captured in `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/vc6-frontier-run.log`	2; `_blake2/blake2s_impl.c` compiled; C2632 diagnostics at `posixmodule.c(14152)` are gone. New first stable blocker is `posixmodule.c(14623)` C2275/C2146/C2065 for `freefunc free_func` in the later scandir code. Later diagnostics remain; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; complete nested diff reproduced byte-for-byte; nested and non-generated outer diffs pass whitespace checks.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect and re-probe posixmodule.c(14623) freefunc C89 declaration before choosing another slice; do not fold in later API/language diagnostics. No commit or publication occurred.

Latest revision (`os_DirEntry_inode_impl()` VC6 C89 declarations)

Date: 2026-09-24 03:34 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before this slice, the top-level checkout already had local changes to PORT_STATUS.md, the compatibility patch, and the frontier test; the detached cpython/ checkout had extensive source modifications. These were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. The provided legacy-toolchain skill reference file was not present at either expected profile/default skill path or in the project; work followed the full instructions supplied in the task. One focused Codex coding-agent lane implemented the slice; the forced probe and applicable regression suites were rerun directly. No independent reviewer is claimed.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed before editing and remained the active source-list frontier: it compiled, with total=40 compiled=39 cached=0 skipped=0. First stable diagnostics were in os_DirEntry_inode_impl() at posixmodule.c(14124) C2143 before const, followed by C2065 for path at 14125, C2143 at 14126, and C2065 for saved_errno at 14139. Following TDD, a focused whole-function structural assertion was added before the source edit and observed RED (exit 1). The narrow edit hoisted only the branch-specific path declarations and shared saved_errno declaration in the existing if (!self->got_file_index) block, keeping const wchar_t * versus wchar_t * under the existing preprocessor branches. Assignments remain at their original evaluation points: after successful decoding, around LSTAT, with errno saved before decref/free cleanup. The focused assertion then passed.

Files changed in this slice:

cpython/Modules/posixmodule.c — declaration ordering only in os_DirEntry_inode_impl().
scripts/vc6-probe-pythoncore-frontier.test.sh — exact-function structural assertion checking C89 declaration placement and branch evaluation/cleanup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff and compared byte-for-byte.
PORT_STATUS.md — this entry.

Exact commands and results:

Command	Exit/result
Focused exact-function assertion before production edit	1; expected RED, assertion reports the declaration/order requirement is not yet met.
Same focused assertion after edit	0; assertion passed.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable suites passed, including the live frontier test's first-source compile check.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; 39 of 40 compiled, `_blake2/blake2s_impl.c` compiled; first errors at `posixmodule.c(14124)` C2143, 14125 C2065, 14126 C2143, and 14139 C2065.
Same forced fresh frontier probe after edit	2; 39 of 40 compiled; the declaration errors at 14124–14139 are gone. New first diagnostic is `posixmodule.c(14152)` C2632 (`long` followed by `long` is illegal), followed by distinct later blockers including `freefunc` declaration errors at 14623 and Win32 API/language errors. Summary `total=40 compiled=39 cached=0 skipped=0`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; generated patch matches the full nested CPython diff byte-for-byte and nested whitespace check passes.

This is compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect and re-probe the posixmodule.c(14152) C2632 64-bit type spelling before choosing another slice; do not fold in later diagnostics.

Latest revision (`DirEntry_test_mode()` VC6 C89 declaration slice)

Date: 2026-09-24 01:25 UTC

Baseline remains CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read PORT_STATUS.md, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. The top-level and detached cpython/ checkouts contained pre-existing local modifications; those were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. One focused Codex coding-agent lane worked on this exact slice; I independently reran the compiler frontier and applicable regression suites. No independent human review is claimed.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed before the edit and remained applicable: it compiled and 39 of 40 sources compiled. The first stable diagnostic family was posixmodule.c(14024) C2275/C2065 for _posixstate *state declared after statements in DirEntry_test_mode(). Following TDD, a focused exact-function structural assertion was added first and observed RED (exit 1) against the old source; it requires the declaration in the opening C89 declaration group and preserves the state lookup after the stat/error handling. The minimal edit hoisted only _posixstate *state; and changed its original initialized declaration into an assignment at the same evaluation point. The full focused frontier test passed afterward.

Files changed in this slice:

cpython/Modules/posixmodule.c — one declaration-order correction in DirEntry_test_mode() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused structural assertion preserving stat/error/state-lookup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the full nested CPython diff and verified byte-for-byte.
PORT_STATUS.md — this entry.

Exact commands and results:

Command	Exit/result
Focused assertion before source edit	1; expected RED because `state` was still declared after executable statements.
Focused assertion after source edit (included in full test run)	0; assertion passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all assertions passed.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled, `total=40 compiled=39 cached=0 skipped=0`; first diagnostics at `posixmodule.c(14024)` C2275/C2065 for `_posixstate`/`state`.
Same forced fresh frontier probe after edit	2; `_blake2/blake2s_impl.c` compiled and 39 sources compiled. The 14024 declaration diagnostics are gone. New first stable blocker is `posixmodule.c(14124)` C2143 before `const`, followed by C2065 for `path` at 14125 and later errors. Summary `total=40 compiled=39 cached=0 skipped=0`.
Coding-agent sandbox forced-probe attempt	1; Wine could not create `/run/user/1000/wine/server-801-136fb0/lock` on its read-only filesystem, so no compiler conclusion was taken from that attempt. The same command was rerun directly outside the restricted coding-agent sandbox and produced the compiler result above.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; patch regenerated; nested diff check and byte-for-byte comparison passed.
`git diff --check` over the outer tree	2; reports trailing spaces in added lines of the generated patch, which reproduces the complete nested source diff exactly. `git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: inspect and force-re-probe the C89 declaration in DirEntry_fetch_stat() at posixmodule.c(14124) before any further edit. Preserve later distinct blockers; do not broaden into cascades.

Latest revision (`DirEntry_fetch_stat()` VC6 C89 declaration slice)

Date: 2026-09-23 23:17 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read this status, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. The top-level checkout and detached cpython/ checkout had pre-existing local changes; these were preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. One focused Codex coding-agent lane handled the implementation and followed TDD; I independently reran the probe and regression gates. No independent human review is claimed.

The recorded frontier was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 of 40 sources compiled, and posixmodule.c(13870) first failed on a C89 declaration (const wchar_t *path), with analogous path declarations and saved_errno later in DirEntry_fetch_stat(). The focused structural assertion was added first and observed RED (exit 1) before the source edit; it passed GREEN (exit 0) afterward. The narrow edit hoists saved_errno and the Windows/POSIX-specific path pointer declarations into the opening declaration group, changing their original initializers into assignments at the same points. Conversion, stat call, errno capture, cleanup, and error behavior remain ordered as before.

Files changed in this slice:

cpython/Modules/posixmodule.c — C89 declarations in DirEntry_fetch_stat() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — one exact-function structural regression assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the full nested diff and verified byte-for-byte.
PORT_STATUS.md — this entry.

Exact validation commands/results:

Command	Exit/result
Focused assertion before production edit	1; expected RED, declaration/order assertion failure.
Focused assertion after production edit	0; GREEN.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all assertions passed, including `DirEntry_fetch_stat`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled; `total=40 compiled=39 cached=0 skipped=0`; first diagnostics at `posixmodule.c(13870)` C2143 and later C2065 for `path`.
Same forced frontier probe after edit	2; `_blake2/blake2s_impl.c` compiled and 39 sources compiled; diagnostics at 13870/13901 are gone. New first stable diagnostic is `posixmodule.c(14024)` C2275/C2065 for the post-statement `_posixstate *state` declaration in `DirEntry_test_mode()`. Later cascades include distinct C89/API errors; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax and all applicable regression suites passed.
`git -C cpython diff --check`	0.
`git -C cpython diff	cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: inspect and re-probe the C89 declaration in DirEntry_test_mode() at posixmodule.c(14024) before any further edit. Preserve the later separate blockers and do not broaden into cascades.

Latest revision (`posixmodule.c` `DirEntry_dealloc()` C89 declaration slice)

Date: 2026-09-23 21:08 UTC

Baseline: CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before work, read PORT_STATUS.md, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. The top-level and detached CPython checkouts had pre-existing local modifications; all were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. A requested focused coding-agent lane was attempted but could not launch because the Anthropic provider package is unavailable (anthropic required); I performed this single narrow slice directly and did not claim independent review.

The recorded frontier was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(13820) failed with C2275/C2146/C2065 for the freefunc free_func declaration after preceding DECREF statements. Hoisted only the bare freefunc free_func; declaration in DirEntry_dealloc() and changed its original initializer into an assignment at the same point. Cleanup, slot lookup, invocation, and decref order are unchanged. The focused assertion was introduced first and failed (exit 1) before the source change. The assertion initially also had a test-slice signature mismatch; corrected that harness expectation, then verified it green.

Files changed in this slice:

cpython/Modules/posixmodule.c — one declaration-order fix in DirEntry_dealloc().
scripts/vc6-probe-pythoncore-frontier.test.sh — focused regression assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated complete nested diff.
PORT_STATUS.md — this entry.

Exact commands/results:

Command	Exit/result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before edit	2; `_blake2/blake2s_impl.c` compiled; total=40, compiled=39, cached=0, skipped=0; first diagnostic family at `posixmodule.c(13820)`, C2275/C2146/C2065 for `freefunc`/`free_func`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` before source edit	1; expected focused assertion failure.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit and test expectation correction	0; `ALL TESTS PASSED`, including the new assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after edit	2; `_blake2/blake2s_impl.c` still compiles and 39 sources compile. The 13820 family is gone. New first diagnostics are `posixmodule.c(13870)` C2143/C2065 for `const`/`path`, with later distinct issues; a second `freefunc` C2275/C2146/C2065 family appears at 14606. Summary total=40, compiled=39, cached=0, skipped=0.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; byte comparison with `cmp -s <(git -C cpython diff) ...`	0; patch reproduces the complete nested diff byte-for-byte.

Compiler-probe progress only: no pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: posixmodule.c(13870) C89 declaration diagnostic in the following scandir-related function; inspect and re-probe before any further change. The separate later freefunc diagnostic at 14606 remains recorded, not included in this slice.

Latest revision (`posixmodule.c` `os_cpu_count_impl()` VC6 processor-count fallback)

Date: 2026-09-23 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read PORT_STATUS.md, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Existing top-level and detached CPython local modifications were preserved; no reset, clean, stash, discard, commit, push, or publication occurred. One focused Codex coding lane implemented only this slice. The forced probe was re-run directly outside its restricted Wine sandbox after that sandbox could not create Wine's server lock.

The recorded frontier was force-re-probed before implementation and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(13612) failed first because VC6 lacks ALL_PROCESSOR_GROUPS. Inspection established that merely defining the constant would still call GetActiveProcessorCount, a Windows 7 API unavailable to Win9x. The narrow fix uses the VC98-available GetSystemInfo() and SYSTEM_INFO.dwNumberOfProcessors only under _MSC_VER < 1300; modern builds retain GetActiveProcessorCount(ALL_PROCESSOR_GROUPS). Existing count-or-None handling is unchanged.

Files changed for this slice:

cpython/Modules/posixmodule.c — VC6-only processor-count implementation in os_cpu_count_impl().
scripts/vc6-probe-pythoncore-frontier.test.sh — focused assertion for the VC6 API path and modern behavior.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff.
PORT_STATUS.md — this entry.

Exact validation commands and results:

Command	Exit/result
Focused assertion before source edit: `python3 /tmp/vc6-all-processors/focused.py cpython/Modules/posixmodule.c`	1; expected RED: `AssertionError: os_cpu_count must use VC6-only GetSystemInfo and preserve modern all-group query/count-or-None`.
Same focused assertion after source edit	0.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`, including the new assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (fresh direct run)	2; `_blake2/blake2s_impl.c` compiled and 39 sources compiled. `ALL_PROCESSOR_GROUPS` diagnostic is gone. First remaining diagnostics are `posixmodule.c(13820)` C2275/C2146/C2065 for `freefunc`/`free_func`, followed by additional distinct C89/API diagnostics. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; shell syntax and all applicable regression suites passed. The delegated restricted-sandbox aggregate attempt failed due to Wine's read-only `/run/user/1000` server-lock path; the direct command above completed successfully.
`git -C cpython diff --check`	0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; regenerated patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow source frontier: the posixmodule.c(13820) C89 freefunc/free_func declaration family; re-probe before changing it.

Latest revision (`posixmodule.c` `os_get_terminal_size_impl()` C89 declarations)

Date: 2026-09-23 16:49 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Read PORT_STATUS.md, README.md, and the legacy-toolchain reference before work. The top-level main checkout and detached cpython/ checkout both contained pre-existing local modifications; all were preserved. No reset, clean, stash, discard, commit, push, or publication occurred. The MSVC600 toolchain remains local-only and external.

The recorded frontier was force-re-probed before implementation: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(13568) was the first stable diagnostic family (C2275/C2065 for TerminalSizeType), with the following pos declaration producing C2143 and later unrelated errors cascading. One focused Codex coding lane performed the TDD edit in the existing checkout. Its first in-sandbox forced probe and aggregate regression command were blocked by Wine's read-only /run/user/1000 server lock; these were rerun directly outside that sandbox and produced real results below. No independent review is claimed.

The focused test was added and observed RED before the production edit (exit 1: assertion that os_get_terminal_size_impl had not yet hoisted its locals). The minimal edit hoists PyObject *TerminalSizeType and int pos into the opening declaration group and changes only their original initializers to assignments; evaluation, SET_TERMSIZE/error handling, and return order remain unchanged.

Files changed for this slice:

cpython/Modules/posixmodule.c — C89 declaration-order correction in os_get_terminal_size_impl() only.
scripts/vc6-probe-pythoncore-frontier.test.sh — focused full-function structural assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested CPython diff.
PORT_STATUS.md — this entry.

Exact validation commands and results:

Command	Exit/result
Focused test before source edit (coding-lane run)	1; expected RED assertion: `os_get_terminal_size_impl must declare TerminalSizeType/pos in the opening C89 group...`.
Focused test after source edit	0; assertion passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`, including the new full-function assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (fresh direct run)	2; `_blake2/blake2s_impl.c` compiled; 39 sources compiled; `TerminalSizeType`/`pos` declaration diagnostics are gone. First remaining diagnostic: `posixmodule.c(13612)` C2065, `ALL_PROCESSOR_GROUPS` undeclared; later distinct C89/API diagnostics remain. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all applicable regression suites passed. The initial in-sandbox attempt exited 1 because Wine could not create its server lock on a read-only filesystem; the direct rerun passed.
`git -C cpython diff --check`	0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	regeneration succeeded; byte-for-byte comparison exit 0.

This is compiler-probe progress only. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next narrow frontier: the separate VC98/Win9x API constant blocker ALL_PROCESSOR_GROUPS at posixmodule.c(13612); do not broaden into later cascades.

Latest revision (`posixmodule.c` VC6 `_MAX_ENV` fallback slice)

Date: 2026-09-23 14:40 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The requested one focused coding-agent lane could not launch because the runtime lacks the anthropic package; no child changes were used. I performed this one narrow TDD slice directly, preserving all local changes. No independent review is claimed.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(11238) was the first stable blocker, C2065 for unavailable _MAX_ENV. The focused assertion was added and observed RED before the source edit, then GREEN after the edit. The smallest VC6-only fallback was added under MS_WINDOWS and _MSC_VER < 1300, protected by #ifndef; modern SDK definitions and the existing environment-length check are unchanged. The next first stable blocker is the distinct posixmodule.c(13568) C2275/C2065 family for TerminalSizeType (with later legacy API/C89 diagnostics cascading after it).

This slice changed only:

cpython/Modules/posixmodule.c — added a guarded _MAX_ENV 32767 fallback for the VC98/MSVC6 path.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the guarded fallback.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first blocker `posixmodule.c(11238)` C2065 for `_MAX_ENV`; summary `total=40 compiled=39 cached=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	1; expected RED: `VC6 _MAX_ENV fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	2; `_MAX_ENV` blocker is gone; first reported stable blocker is `posixmodule.c(13568)` C2275/C2065 for `TerminalSizeType`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct TerminalSizeType C89/API blocker at posixmodule.c(13568); do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `win32_putenv()` C89 declaration slice)

Date: 2026-09-23 12:33 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. One focused Codex coding-agent lane implemented this exact TDD slice; no independent review is claimed.

The recorded _blake2/blake2s_impl.c frontier was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(11217) was the first stable blocker. MSVC6 reported C2275/C2065 for PyObject *unicode, followed by the same C89 declaration-order family for size, env, and err. The child first added a focused structural assertion and reported the required RED result (exit 1), then added only the C89 declaration/assignment slice. Afterward, the compiler advanced past those declarations; the next first stable blocker is the distinct VC98 SDK/API gap posixmodule.c(11238), undeclared _MAX_ENV.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted PyObject *unicode, Py_ssize_t size, wchar_t *env, and int err into win32_putenv()'s opening declaration group; changed only the env and err initializers into assignments at their original points. Evaluation, cleanup, error, and return order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the declaration group and preserved body order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first stable blocker `posixmodule.c(11217)` C2275/C2065 for `unicode`; summary `total=40 compiled=39 cached=0`.
Focused `win32_putenv()` assertion before source edit	1; expected RED, as reported by the delegated lane.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	2; `posixmodule.c` passed the declaration family; first stable blocker is `posixmodule.c(11238)` C2065 for unavailable `_MAX_ENV`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC98 SDK/API blocker at posixmodule.c(11238), _MAX_ENV; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` VC6 `SYMBOLIC_LINK_FLAG_DIRECTORY` fallback slice)

Date: 2026-09-23 10:26 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. One focused Codex coding-agent lane implemented this exact TDD slice; no independent review is claimed.

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and the recorded first blocker was posixmodule.c(9076) C2065 for unavailable SYMBOLIC_LINK_FLAG_DIRECTORY. The child first added a focused assertion and reported the required RED result, then added only a VC6-guarded fallback for the missing constant while preserving the modern path. After the slice, the compiler advanced past line 9076; the first stable frontier is now the later os_putenv_impl() C89 declaration family at posixmodule.c(11217).

This slice changed only:

cpython/Modules/posixmodule.c — added _MSC_VER < 1300/#ifndef fallback SYMBOLIC_LINK_FLAG_DIRECTORY 0x1; modern SDK behavior and the symlink API call remain unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the guarded fallback.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
Focused `SYMBOLIC_LINK_FLAG_DIRECTORY` assertion before source edit	1; expected RED, as reported by the delegated coding lane.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`, including the new fallback assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	2; `_blake2/blake2s_impl.c` compiled and `posixmodule.c` compiled past line 9076. First stable blocker is `posixmodule.c(11217)` C2275/C2065 for later C89 declarations in `os_putenv_impl()`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order blocker at posixmodule.c(11217) in os_putenv_impl(); do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os_readlink_impl()` VC6 reparse-API gate slice)

Date: 2026-09-23 08:18 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The requested focused coding-agent delegation was attempted but could not launch because the runtime lacks the anthropic package; no child changes were used.

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(8885) was the first stable blocker, C2065 for unavailable FSCTL_GET_REPARSE_POINT. This run implemented one narrow TDD compatibility slice only: gate the entire Windows os_readlink_impl() reparse-point implementation for MSVC6 and return NotImplementedError instead of referencing the unavailable VC98 SDK operation. The modern MSVC path remains unchanged.

This slice changed only:

cpython/Modules/posixmodule.c — added _MSC_VER < 1300 fallback in the MS_WINDOWS branch of os_readlink_impl(), returning NotImplementedError; the modern DeviceIoControl/reparse implementation remains under the #else branch.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6 fallback and preservation of the modern FSCTL_GET_REPARSE_POINT path.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

|| Command | Exit/result | |---|---| || WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl' | 0; banner Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | 2; _blake2/blake2s_impl.c compiled, 39 sources compiled, first blocker posixmodule.c(8885) C2065 for FSCTL_GET_REPARSE_POINT; summary total=40 compiled=39 cached=0. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the focused assertion, before source edit | 1; expected RED: VC6 os_readlink fallback missing. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | 0; GREEN, ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | 2; posixmodule.c compiled past FSCTL_GET_REPARSE_POINT. The next first stable blocker is posixmodule.c(9076) C2065 for unavailable SYMBOLIC_LINK_FLAG_DIRECTORY; summary total=40 compiled=39 cached=0. | || bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; shell syntax and all applicable regression suites passed. | || git -C cpython diff --check | 0; nested source diff clean. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch; git -C cpython diff \\| cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch | both 0; compatibility patch matches the complete nested source diff byte-for-byte. |

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC98 SDK/API blocker posixmodule.c(9076), SYMBOLIC_LINK_FLAG_DIRECTORY; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os_waitpid_impl()` C89 declaration-order slice)

Date: 2026-09-23 06:11 UTC

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(8741) was the first stable blocker. After the prior 64-bit spelling slice, the stable diagnostic family was C2143/C2065 for the post-statement PY_LONG_LONG ustatus declaration/use. One focused Codex coding-agent lane implemented this exact TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — moved PY_LONG_LONG ustatus into os_waitpid_impl()'s opening C89 declaration group and changed its original declaration initializer to ustatus = (unsigned int)status;. The conversion point, left shift, and Py_BuildValue() result order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused structural assertion; it was observed RED before the source edit and GREEN afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
Focused waitpid assertion before source edit	1; expected RED.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled, and `posixmodule.c` compiled past line 8741. The next first stable blocker is `posixmodule.c(8885)` C2065 for unavailable `FSCTL_GET_REPARSE_POINT`; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `git -C cpython diff \| cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC98 SDK/API blocker posixmodule.c(8885), FSCTL_GET_REPARSE_POINT; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os_waitpid_impl()` VC6 64-bit spelling slice)

Date: 2026-09-23 04:03 UTC

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(8741) was the first stable blocker. The initial diagnostic family was MSVC6 C2632/C2143/C2065 for unsigned long long ustatus and its use. The requested focused coding-agent lane could not launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving local changes. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — changed unsigned long long ustatus to CPython's PY_LONG_LONG abstraction in os_waitpid_impl(). The (unsigned int)status conversion, left shift, and Py_BuildValue() expression are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6-compatible status type and preserved the status shift.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled, first blocker `posixmodule.c(8741)` C2632/C2143/C2065 for `unsigned long long ustatus`; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before source edit	1; expected RED: `os_waitpid_impl must use the VC6-compatible PY_LONG_LONG status type`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; GREEN, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` passed the `long long` spelling blocker. The next first stable blocker is the distinct C89 declaration-order error at `posixmodule.c(8741)` C2143/C2065 for the still post-statement `ustatus` declaration/use; summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `git -C cpython diff \| cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(8741) for ustatus; do not broaden into the later os_readlink_impl() API/declaration diagnostics.

Latest revision (`posixmodule.c` `os_kill_impl()` C89 declaration-order slice)

Date: 2026-09-23 01:56 UTC

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(8177) was the first stable blocker. MSVC6 reported C2275/C2065/C2146 for the Windows-local declarations in os_kill_impl(). One focused Codex coding-agent lane implemented only this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted the Windows os_kill_impl() locals (result, sig, err, and handle) into the opening declaration group and changed sig initialization to an assignment at its original evaluation point. Audit, signal conversion, error handling, process termination, cleanup, and return order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89 declarations and preserved evaluation/error/cleanup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
Focused `os_kill_impl` assertion before source edit	1; expected RED declaration/order assertion failure, as reported by the delegated lane.
Focused `os_kill_impl` assertion after source edit	0; GREEN.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled, and `posixmodule.c` compiled past line 8177. The next first stable blocker is `posixmodule.c(8741)` C2632/C2143/C2065 for the `long long` spelling in the `os_readlink_impl()` sequence; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `git -C cpython diff \| cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC6 64-bit spelling defect at posixmodule.c(8741) in the os_readlink_impl() sequence; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os_spawnv_impl()` C89 `saved_errno` declaration slice)

Date: 2026-09-22 23:47 UTC

The recorded _blake2/blake2s_impl.c frontier state was force-re-probed first and remained true: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(6699) was the first stable blocker. MSVC6 reported C2143 for the mixed declaration int saved_errno = errno;, followed by C2065 at its use. The requested focused coding-agent delegation could not launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving all local changes. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted int saved_errno into os_spawnv_impl()'s opening declaration group and changed the original post-thread assignment to saved_errno = errno;. The assignment, free_string_array() cleanup, errno restoration, and spawn-result error order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89 declaration and preserved assignment/cleanup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled, and first blocker `posixmodule.c(6699)` C2143/C2065 for `saved_errno`; summary `total=40 compiled=39 cached=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before source edit	1; expected RED: `os_spawnv_impl saved_errno declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; GREEN, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 6699. The next first stable blocker is `posixmodule.c(8177)` C2275/C2065 for declarations after executable statements in `os_kill_impl()`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh`	0.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(8177) in os_kill_impl(); do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `parse_envlist()` C89 key/val declaration slice)

Date: 2026-09-22 21:40 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before this run, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(5840) was the first stable blocker. MSVC6 reported C2275/C2065 for the loop-local PyObject *val declaration. One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted PyObject *key, *val into parse_envlist()'s opening declaration group and changed both loop declarations to assignments at their original PyList_GetItem() evaluation points. NULL checks, conversion order, cleanup, and error flow are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89 declarations and preserved PyList_GetItem()/evaluation/error/cleanup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
Focused parse-envlist assertion before source edit	1; expected RED assertion failure: `parse_envlist must hoist key and val into the C89 declaration group and preserve PyList_GetItem/evaluation/error/cleanup order`.
Focused parse-envlist assertion after source edit	0; GREEN, no output.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`, including the new parse-envlist assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `posixmodule.c` compiled past line 5840. The next first stable blocker is `posixmodule.c(6699)` C2143 for `saved_errno`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(6699) for saved_errno; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` VC6 reparse-tag constants slice)

Date: 2026-09-22 19:31 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(5130) was the first stable blocker. MSVC6 reported C2065 for the VC98 SDK's missing IO_REPARSE_TAG_SYMLINK; the paired mount-point constant was also unavailable. The requested focused coding-agent delegation could not launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving all local changes.

This slice changed only:

cpython/Modules/posixmodule.c — added _MSC_VER < 1300/#ifndef fallbacks for IO_REPARSE_TAG_SYMLINK (0xA000000C) and IO_REPARSE_TAG_MOUNT_POINT (0xA0000003). The existing Py_DeleteFileW() tag checks and modern SDK behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6-only guarded constants and preservation of both tag checks.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first stable blocker `posixmodule.c(5130)` C2065 for `IO_REPARSE_TAG_SYMLINK`; summary `total=40 compiled=39 cached=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	1; expected RED: `VC6 symlink reparse-tag fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 5130. The next first stable blocker is `posixmodule.c(5840)` C2275/C2065 for the loop-local `PyObject *val`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(5840) in the environment-building loop; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os__path_normpath_impl()` C89 declaration-order slice)

Date: 2026-09-22 17:23 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(4614) was the first stable blocker. MSVC6 reported C2275/C2146/C2065 for the mixed declarations in os__path_normpath_impl(). One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required focused RED test before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — moved len, buffer, norm_len, norm_path, and result into the function's opening declaration group and changed initializers to assignments at their original evaluation points. Type checking, allocation, NULL handling, normalization, result creation, cleanup, and return order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration group and preserved evaluation/error/cleanup order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first blocker `posixmodule.c(4614)` C2275/C2146/C2065 for `len`, `buffer`, `norm_len`, `norm_path`, and `result`; summary `total=40 compiled=39 cached=0`.
Focused normpath structural assertion before source edit	1 as reported by the delegated lane; expected RED.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	0; `ALL TESTS PASSED`, including the normpath assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 4614. The next first stable blocker is `posixmodule.c(5130)` C2065 for unavailable `IO_REPARSE_TAG_SYMLINK`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC98 SDK/API blocker at posixmodule.c(5130), IO_REPARSE_TAG_SYMLINK; do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os__path_splitroot_impl()` C89 loop-counter slice)

Date: 2026-09-22 15:14 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before this slice, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(4569) was the first stable blocker. MSVC6 reported C2143/C2065 for the C99 for (wchar_t *p = ...) declaration in os__path_splitroot_impl(). One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted wchar_t *p into os__path_splitroot_impl()'s opening declaration group and changed the loop initializer to p = wcschr(...); slash replacement and loop evaluation order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and preserved copy/search/replace order. The delegated lane observed the required RED failure (exit 1) before the source edit and GREEN (exit 0) afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first blocker `posixmodule.c(4569)` C2143/C2065 for the post-statement `wchar_t *p`; summary `total=40 compiled=39 cached=0`.
Focused split-root structural assertion before source edit	1; expected RED assertion failure.
Focused split-root structural assertion after source edit	0; expected GREEN result.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 4569. The next first stable blocker is `posixmodule.c(4614)` C2275/C2146/C2065 for mixed declarations in `os__path_normpath_impl()` (`Py_ssize_t len`, `wchar_t *buffer`, and subsequent locals); summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(4614) in os__path_normpath_impl(); do not broaden into later API or cascading diagnostics.

Latest revision (`posixmodule.c` `os__getfinalpathname_impl()` C89 `tmp` declaration slice)

Date: 2026-09-22 13:07 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The top-level checkout remains on main with pre-existing local changes preserved; the nested cpython/ checkout remains detached at the baseline with its existing port edits. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The current frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(4473) was the first stable blocker, MSVC6 C2143/C2065 for the post-statement wchar_t *tmp declaration. One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted wchar_t *tmp into os__getfinalpathname_impl()'s opening declaration group; the existing PyMem_Realloc, NULL-error, buffer-size, and target-path assignment sequence is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and preserved realloc/error/assignment order. The delegated lane reported the required RED failure before the source edit and GREEN afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
Forced frontier probe before this slice	2; first stable blocker `posixmodule.c(4473)` C2143/C2065 for `wchar_t *tmp`; `_blake2/blake2s_impl.c` compiled; summary `total=40 compiled=39 cached=0`.
Focused `tmp` assertion before source edit	1; expected RED assertion failure.
Focused `tmp` assertion after source edit	0; expected GREEN result.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 4473. The next first stable blocker is `posixmodule.c(4569)` C2143/C2065/C2143 for the C99 `for (wchar_t *p = ...)` declaration; summary `total=40 compiled=39 cached=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/generate-getpath-frozen.test.sh`	0; all applicable regression suites reported `ALL TESTS PASSED`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh`	0.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89/C99 loop-declaration defect at posixmodule.c(4569); do not broaden into later cascading diagnostics.

Latest revision (`posixmodule.c` `os__getfullpathname_impl()` C89 declaration-order slice)

Date: 2026-09-22 08:46 UTC

The current frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(4402) was the first stable blocker, MSVC6 C2275/C2065 for the post-statement PyObject *str declaration in os__getfullpathname_impl(). One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted PyObject *str into os__getfullpathname_impl()'s opening declaration group and changed its initializer to an assignment at the original PyUnicode_FromWideChar() point. Freeing, error handling, Py_SETREF, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and preserved conversion/free/error/reference order. The delegated lane reported the required RED failure before the source edit; the assertion passed afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first stable blocker `posixmodule.c(4402)` C2275/C2065 for `PyObject *str`; summary `total=40 compiled=39 cached=0`. `_blake2/blake2s_impl.c` compiled.
Focused `os__getfullpathname_impl()` assertion before source edit	1 as reported by the delegated lane; expected RED.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	0; `ALL TESTS PASSED`, including the new `os__getfullpathname_impl` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 4402. The next first stable blocker is `posixmodule.c(4455)` C2065 for unavailable `VOLUME_NAME_DOS`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct VC98 SDK/API blocker at posixmodule.c(4455), VOLUME_NAME_DOS; do not broaden into later cascading diagnostics.

Latest revision (`posix_getcwd()` `resobj` C89 declaration-order slice)

Date: 2026-09-22 06:39 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(3874) was the first stable blocker, MSVC6 C2275/C2065 for the post-statement PyObject *resobj declaration in posix_getcwd(). The requested focused coding-agent delegation failed before launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving local changes. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted PyObject *resobj into posix_getcwd()'s opening declaration group and changed its initializer to an assignment at the original PyUnicode_FromWideChar() point. Freeing, use_bytes conversion, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original result/free sequence. It failed before the source edit and passed afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first stable blocker `posixmodule.c(3874)` C2275/C2065 for `PyObject *resobj`; summary `total=40 compiled=39 cached=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	1; expected RED: `posix_getcwd resobj declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posix_getcwd()` compiled past the `resobj` blocker. The next first stable blocker is `posixmodule.c(4402)` C2275/C2065 for a later post-statement `PyObject *str`; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(4402) for PyObject *str; do not broaden into later API or cascading diagnostics.

Latest revision (`posixmodule.c` `_pystat_fromstructstat()` nanosecond declaration-order slice)

Date: 2026-09-22 04:31 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(2493) was the first stable blocker, an MSVC6 C2143 declaration-order error for unsigned long ansec, mnsec, cnsec. One focused Codex coding-agent lane implemented exactly this TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted unsigned long ansec, mnsec, cnsec into _pystat_fromstructstat()'s opening declaration group and removed the later declaration. The feature-condition assignments and evaluation order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the opening declaration group and original nanosecond assignment/branch sequence. The delegated lane reported the required RED failure before the source edit and GREEN afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; first stable blocker `posixmodule.c(2493)` C2143 for the post-statement nanosecond declaration; summary `total=40 compiled=39 cached=0`.
Focused nanosecond assertion before source edit	1; expected RED assertion failure, as reported by the delegated lane.
Focused nanosecond assertion after source edit	0; expected GREEN result.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past line 2493. The next first stable blocker is `posixmodule.c(3874)` C2275/C2065 for a later mixed declaration (`PyObject *resobj`); summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct later C89 declaration-order defect at posixmodule.c(3874); do not broaden into subsequent API or cascading diagnostics.

Latest revision (`posixmodule.c` `_pystat_fromstructstat()` VC6 64-bit spelling slice)

Date: 2026-09-22 02:25 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(2472)/(2488) were the first stable blockers, both MSVC6 C2632 errors for long long spellings in _pystat_fromstructstat(). The requested coding-agent delegation was attempted but failed before launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving all local changes. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — changed the two _pystat_fromstructstat() static_assert type spellings from unsigned long long/long long to unsigned PY_LONG_LONG/PY_LONG_LONG, preserving assertions and runtime behavior.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6-compatible stat-size spelling. It failed before the source edit and passed afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

||| Command | Exit/result | |||---|---| ||| WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl' | 0; Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. | ||| VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | 2; first stable blockers posixmodule.c(2472) and (2488), C2632 long followed by long; summary total=40 compiled=39 cached=0. | ||| bash scripts/vc6-probe-pythoncore-frontier.test.sh before source edit | 1; expected RED: VC6 stat-size assertion must use PY_LONG_LONG, followed by the focused assertion failure. | ||| bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | 0; ALL TESTS PASSED. | ||| VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after this slice | 2; posixmodule.c compiled past both long long spelling blockers; next first stable blocker is posixmodule.c(2493) C2143, the post-statement unsigned long ansec, mnsec, cnsec declaration. Summary total=40 compiled=39 cached=0. | ||| bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; all applicable regression suites and shell syntax checks passed. | ||| git -C cpython diff --check | 0; nested source diff clean. | ||| git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | both 0; compatibility patch matches the complete nested source diff byte-for-byte. |

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(2493) in _pystat_fromstructstat(); do not broaden into later API or cascading diagnostics.

Latest revision (`posixmodule.c` `_pystat_fromstructstat()` C89 declaration-order slice)

Date: 2026-09-22 00:18 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(2453) was the first stable blocker, the C89 declaration-order family in _pystat_fromstructstat(). The requested coding-agent delegation was attempted but failed before launch because the runtime lacks the anthropic package; no child changes were used. I then performed this one narrow TDD slice directly, preserving all local changes. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted PyObject *StatResultType and PyObject *v before the initial assertion and changed their initializers to assignments at the original evaluation point. Evaluation order and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration group and preserved assignment sequence. The assertion failed before the source edit and passed afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

|| Command | Exit/result | ||---|---| || WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl' | 0; Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | 2; posixmodule.c(2453) first stable blocker, C2143/C2275/C2065 for post-statement StatResultType/v; summary total=40 compiled=39 cached=0. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the assertion, before source edit | 1; expected RED: _pystat_fromstructstat declaration missing from opening group. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | 0; ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after this slice | 2; posixmodule.c compiled past line 2453; next first stable blocker is posixmodule.c(2472) C2632, long long spelling; summary total=40 compiled=39 cached=0. | || bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh | 0; all applicable regression suites and shell syntax checks passed. | || git -C cpython diff --check | 0; nested source diff clean. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | both 0; compatibility patch matches the complete nested source diff byte-for-byte. |

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct posixmodule.c(2472) long long defect family; do not broaden into later declaration, API, or cascading diagnostics.

Latest revision (`posixmodule.c` `fill_time()` C89 declaration-order slice)

Date: 2026-09-21 22:10 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(2400) was the first stable blocker, the C89 declaration-order family in fill_time(). One focused Codex coding-agent lane implemented only this slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed; the resulting diff and all gates below were independently checked.

This slice changed only:

cpython/Modules/posixmodule.c — hoisted res, s_in_ns, ns_total, float_s, s, and ns_fractional before the initial assertion; changed only the two object-creation declarations into assignments at their original evaluation point. Cleanup and evaluation order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the opening declaration group, absence of mixed declarations, and preserved assignment/cleanup sequence. The delegated lane reported the required RED test before the source edit and GREEN afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report only.

Exact validation commands and results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	2; `_blake2/blake2s_impl.c` compiled and `posixmodule.c(2400)` was first; C2143/C2275/C2065 followed for `res`, `s_in_ns`, `ns_total`, and `float_s`; summary `total=40 compiled=39 cached=0 skipped=0`.
focused `fill_time()` assertion before source edit	1 as reported by the coding lane; expected RED declaration/order failure.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	0; `ALL TESTS PASSED`, including the new `fill_time()` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	2; `posixmodule.c` compiled past `fill_time()`; next first stable blocker `posixmodule.c(2453)` is `_pystat_fromstructstat()`'s post-statement `PyObject *StatResultType` declaration (C2143/C2275/C2065). Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed.
`git -C cpython diff --check`	0; nested source diff clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s /tmp/win9x-fill-time-diff.patch compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both 0; compatibility patch matches the complete nested source diff byte-for-byte.

This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine Python execution, and no real Windows 98 SE execution. The next narrow slice is the distinct C89 declaration-order defect at posixmodule.c(2453) in _pystat_fromstructstat(); do not broaden into the later long long, API, or cascading diagnostics.

Latest revision (`posixmodule.c` VC6 `fileAttributes` declaration/sentinel slice)

Date: 2026-09-21 19:59 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before edits. Implemented exactly the recorded line-1996/1998 defect family in the existing checkout. All pre-existing local changes and the history below are preserved; nothing was reset, cleaned, stashed, discarded, committed, pushed, or published.

Files changed in this slice:

cpython/Modules/posixmodule.c: moved DWORD fileAttributes to the opening of its existing non-disk block, retaining the query after the unknown-file-type error check. Added an MS_WINDOWS/VC6-only, #ifndef-protected INVALID_FILE_ATTRIBUTES definition of ((DWORD)-1). Modern SDK definitions and query/cleanup behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh: one focused assertion covering the declaration, original query order, and guarded sentinel fallback; observed RED before editing source and GREEN afterward.
compat/msvc600/cpython-3.11.16-vc6-headers.patch: regenerated exactly from the complete nested diff, including all earlier local port changes.
PORT_STATUS.md: prepended this entry only.

Exact validation commands and exit codes (log paths are local /tmp artifacts):

Command	Exit/result
`bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/win9x-fileattributes-red.log 2>&1`	1; expected RED: only the new assertion failed, reporting `fileAttributes needs a C89 declaration, original-point query, and VC6-only SDK sentinel fallback`. Source had not yet been edited.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/win9x-fileattributes-green.log 2>&1`	0; GREEN, `ALL TESTS PASSED`. This sandbox run is structural evidence; functioning Wine validation was repeated below.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > /tmp/win9x-fileattributes-frontier.log 2>&1` (sandbox attempt)	1; Wine could not create `/run/user/1000/wine/server-801-136fb0/lock` on the read-only filesystem; no compiler-frontier conclusion from this attempt.
Same forced-frontier command, retried with escalated Wine runtime access	2; `total=40 compiled=39 cached=0 skipped=0`. First compiler error: `posixmodule.c(2400)` C2143, missing `;` before `type`, at `fill_time()`'s post-statement `int res = -1;`. No `fileAttributes` or `INVALID_FILE_ATTRIBUTES` diagnostics remain.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/win9x-fileattributes-green-live.log 2>&1` (with Wine runtime access)	0; `ALL TESTS PASSED`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh > /tmp/win9x-fileattributes-stdint.log 2>&1` (with Wine runtime access)	0; shell syntax and all five applicable regression suites passed.
`git -C cpython diff --check`	0.
`git -C cpython diff	cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`
`git diff --check > /tmp/win9x-fileattributes-diff-check.log`	2; inherited whitespace-only context lines in the generated patch. Kept the required exact nested diff.

Snapshot/hash comparison confirms only Modules/posixmodule.c changed among the pre-existing modified nested source files. The next blocker is the distinct C89 declaration-order family in fill_time() beginning at line 2400; it was not changed. These are compile-probe results only: no linked pythoncore/python.exe, Wine Python execution, or Windows 98 runtime result is claimed.

Latest revision (`posixmodule.c` VC6 `FILE_ATTRIBUTE_TAG_INFO` API-gate slice)

Date: 2026-09-21 17:49 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(1907) was the first stable blocker because the VC98 SDK lacks FILE_ATTRIBUTE_TAG_INFO. One focused Codex coding-agent lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — added a VC6-local two-field tag-info shape and compiled out the unavailable GetFileInformationByHandleEx/FileAttributeTagInfo query block for _MSC_VER < 1300; the modern path is unchanged and existing tagInfo consumers remain valid.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6 fallback and modern-path preservation.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; first blocker `posixmodule.c(1907)` C2065/C2146/C2059 for `FILE_ATTRIBUTE_TAG_INFO`; summary `total=40 compiled=39 cached=0`.
focused TDD assertion before source edit	exit 1 as required by TDD.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `posixmodule.c` compiled past the tag-info API family. The next first stable blocker is `posixmodule.c(1996)` C2275/C2146/C2065 for the post-statement `DWORD fileAttributes`; summary `total=40 compiled=39 cached=0`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `git -C cpython diff \| cmp - compat/msvc600/cpython-3.11.16-vc6-headers.patch`	both exit 0; patch matches the complete nested source diff byte-for-byte.
`git -C cpython diff --check`	exit 0; nested source diff is clean.
top-level `git diff --check`	exit 2 only for inherited blank context lines in the generated compatibility patch; patch remains byte-for-byte reproducible.

Current compile-frontier state: win32_xstat_impl() now compiles past the VC98 FILE_ATTRIBUTE_TAG_INFO/GetFileInformationByHandleEx blocker under MSVC6 through Wine. The next narrow frontier is the distinct C89 declaration-order defect at posixmodule.c(1996). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`posixmodule.c` `win32_wchdir()` C89 declaration-order slice)

Date: 2026-09-21 15:42 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(1826) was the first stable blocker, a C89 declaration-order error for int is_unc_like_path. One focused Codex coding-agent lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — moved is_unc_like_path into win32_wchdir()'s opening declaration group and assigned it at the original post-GetCurrentDirectoryW() point. Evaluation order and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the declaration and assignment order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled; first blocker `posixmodule.c(1826)` C2143/C2065 for the post-statement `is_unc_like_path` declaration; summary `total=40 compiled=39 cached=0`.
delegated `codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, reported the required RED test, applied only `win32_wchdir()`, and regenerated the compatibility patch; no commit/push/publication.
focused TDD assertion before source edit	exit 1 as required by TDD.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch matches the complete nested source diff byte-for-byte.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `posixmodule.c` compiled past line 1826. The next first stable blocker is `FILE_ATTRIBUTE_TAG_INFO` at `posixmodule.c(1907)` (undeclared in the VC98 SDK), followed by cascading legacy API and C89 diagnostics; summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	exit 0; nested source diff is clean.

Current compile-frontier state: win32_wchdir() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct VC98 SDK/API blocker FILE_ATTRIBUTE_TAG_INFO at posixmodule.c(1907). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`posixmodule.c` VC6 reparse-query API slice)

Date: 2026-09-21 13:33 UTC

The recorded frontier was force-re-probed first and remained applicable: 39 sources compiled and posixmodule.c was first. The first stable blocker was the VC98 SDK's undeclared FSCTL_GET_REPARSE_POINT at posixmodule.c(1582). One focused Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — for _MSC_VER < 1300, win32_get_reparse_tag() now returns FALSE without referencing the unavailable reparse query operation; the modern helper body is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the VC6 fallback and preserved modern body.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 39 sources compiled; first stable blocker `posixmodule.c(1582)` C2065, undeclared `FSCTL_GET_REPARSE_POINT`; later C89 declaration and legacy API diagnostics followed; summary `total=40 compiled=39 cached=0 skipped=0`.
focused delegated RED assertion	exit 1 as reported by the coding lane; expected assertion that the VC6 path must return `FALSE` without the unavailable operation.
focused delegated GREEN assertion	exit 0 as reported by the coding lane: `ok - VC6 reparse query returns FALSE and preserves the modern body`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including `VC6 reparse query returns FALSE and preserves the modern body` and `posix reparse query excludes the unavailable operation on VC6`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `posixmodule.c` compiled past `FSCTL_GET_REPARSE_POINT`. The next first stable blocker is `posixmodule.c(1826)` C2143, a later C89 declaration-order defect; legacy API blockers including `FILE_ATTRIBUTE_TAG_INFO` remain. Summary `total=40 compiled=39 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte. Top-level `git diff --check` still reports inherited whitespace-only lines in the generated compatibility patch.

Current compile-frontier state: win32_get_reparse_tag() now compiles past the VC6/VC98 missing-operation blocker under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct C89 declaration-order family at posixmodule.c(1826). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`posixmodule.c` `Py_off_t` VC6 64-bit spelling slice)

Date: 2026-09-21 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and posixmodule.c(1482) was the first stable blocker, C2632 because MSVC6 rejects typedef long long Py_off_t. One focused Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required focused RED assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — changed the Windows Py_off_t typedef from long long to CPython's PY_LONG_LONG alias. Non-Windows behavior is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused structural assertion for the VC6-compatible Windows Py_off_t spelling.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 39 sources compiled; first blocker `posixmodule.c(1482)` C2632 for `long long`; later declarations/APIs also failed; summary `total=40 compiled=39 cached=0`.
delegated focused TDD assertion before source edit	exit 1 as reported by the coding lane; expected failure `Windows Py_off_t must use PY_LONG_LONG`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `Windows Py_off_t uses PY_LONG_LONG`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `posixmodule.c` compiled past the `long long` spelling blocker. The next first stable blocker is `posixmodule.c(1582)` undeclared `FSCTL_GET_REPARSE_POINT`; later C89 declaration/API errors remain. Summary `total=40 compiled=39 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: posixmodule.c now compiles through the VC6 Py_off_t 64-bit spelling family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct legacy-SDK/API blocker at posixmodule.c(1582), FSCTL_GET_REPARSE_POINT. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`posixmodule.c` VC6/Win9x SDDL header/API slice)

Date: 2026-09-21 09:13 UTC

The recorded frontier was force-re-probed first and remained applicable through _blake2/blake2s_impl.c, _operator.c, and the prior 39 compiled sources. The first stable blocker was posixmodule.c(39), fatal C1083 because the VC98 SDK has no sddl.h. One focused Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required focused RED assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/posixmodule.c — excluded the NT-only <sddl.h> include, security-descriptor allocation, SDDL conversion, and LocalFree cleanup for _MSC_VER < 1300; the VC6 path retains CreateDirectoryW(path->wide, NULL). Modern MSVC behavior is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused structural assertion for the VC6 SDDL exclusion and null-security-attribute fallback.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled; first blocker `posixmodule.c(39)`, fatal C1083 for missing `sddl.h`; summary `total=40 compiled=39 cached=0 skipped=0`.
focused delegated TDD assertion before source edit	exit 1 as reported by the coding lane; expected assertion failure for missing VC6 SDDL exclusion/fallback.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `posix mkdir excludes SDDL on VC6 and uses null security attributes`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `posixmodule.c` compiled past the missing `sddl.h` blocker. The next first stable blocker is `posixmodule.c(1482)` C2632 (`long long`), followed by missing legacy declarations/APIs including `FSCTL_GET_REPARSE_POINT` and `FILE_ATTRIBUTE_TAG_INFO`; summary `total=40 compiled=39 cached=0 skipped=0`. Existing warnings include `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: the posixmodule.c missing-sddl.h blocker is cleared under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct VC6 long long family at posixmodule.c(1482). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` designated-initializer family slice)

Date: 2026-09-21 07:04 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before this run, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 39 sources compiled, and _operator.c was the first blocker with the same C99 designated-initializer family at lines (1814) and (1887). One focused external Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required RED focused assertions before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — converted methodcaller_type_spec and operatormodule from designated fields to declared-order positional fields. All values and module/type behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused structural assertions for both positional initializers.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 39 sources compiled; first blocker `_operator.c(1814)` and `(1887)`, both C2059 syntax errors for designated fields; summary `total=39 compiled=38 cached=0`.
delegated `codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the two focused assertions, reported the expected RED failures, applied only the two `_operator.c` positional-initializer edits, regenerated the compatibility patch, and reported GREEN; no commit/push/publication.
focused RED assertions	exit 1 as required by TDD; both new positional-initializer assertions failed before the source edit.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including both new `_operator.c` assertions.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past both designated-initializer blockers. The next first blocker is `posixmodule.c(39)`, fatal C1083 because `sddl.h` is unavailable; summary `total=40 compiled=39 cached=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: _operator.c now compiles through its remaining designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct Win9x/SDK header blocker in posixmodule.c(39): missing sddl.h. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `methodcaller_new()` C89 declaration-order slice)

Date: 2026-09-21 04:55 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 38 sources compiled, and _operator.c(1596) was the first stable blocker. One focused external Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required RED focused assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — hoisted _operator_state *state into methodcaller_new()'s opening declaration group and changed its initializer to an assignment at the original PyType_GetModuleState(type) evaluation point. Allocation and methodcaller behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 38 sources compiled; first blocker `_operator.c(1596)` C2275/C2065/C2223/C2198 for the post-statement `_operator_state *state`; later designated-initializer blockers at `(1813)` and `(1886)`; summary `total=39 compiled=38 cached=0`.
delegated `codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, reported the expected RED failure, applied only `methodcaller_new()`, regenerated the compatibility patch, and reported GREEN; no commit/push/publication.
focused RED assertion	exit 1 as required by TDD; `AssertionError: methodcaller_new needs an opening C89 state declaration and original-point assignment`.
focused GREEN assertion	exit 0; `ok - methodcaller_new uses an opening C89 state declaration and original-point assignment`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including the new `methodcaller_new` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past line 1596. The next first blockers are the distinct designated initializers at `(1814)` and `(1887)`; summary `total=39 compiled=38 cached=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: methodcaller_new() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct _operator.c designated-initializer family at lines 1814 and 1887. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `attrgetter_type_spec` positional-initializer slice)

Date: 2026-09-21 02:46 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 38 sources compiled, and _operator.c(1558) was the first stable blocker. One focused external Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required RED focused assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — converted attrgetter_type_spec from designated fields to declared-order positional fields; values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 38 sources compiled; first blocker `_operator.c(1558)` C2059 for the designated initializer; later blockers at `(1596)`, `(1813)`, and `(1886)`; summary `total=39 compiled=38 cached=0`.
delegated `codex exec --approve-for-me --skip-git-repo-check ...`	exit 0; added the focused assertion, reported the expected RED failure before the source edit, applied only `attrgetter_type_spec`, regenerated the compatibility patch, and reported GREEN; no commit/push/publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including `attrgetter_type_spec uses a C89-compatible declared-order positional initializer`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past line 1558. The next first blocker is the distinct C89 declaration-order family at `(1596)` for `_operator_state *state`; later designated-initializer blockers remain at `(1813)` and `(1886)`; summary `total=39 compiled=38 cached=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`	exit 0; nested source diff is clean.
`cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: attrgetter_type_spec now compiles through its designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _operator.c(1596), the distinct methodcaller_new() C89 declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `attrgetter_vectorcall()` C89 declaration-order slice)

Date: 2026-09-21 00:38 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 38 sources compiled, and _operator.c(1402) was the first stable blocker. One focused external Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required RED focused assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — hoisted Py_ssize_t nargs into attrgetter_vectorcall()'s opening declaration group and changed its initializer to an assignment at the original evaluation point. Argument validation and call behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\\home\\ubuntu\\Organized\\Legacy-Ports\\Projects\\python-win9x\\MSVC600\\VC98\\Bin\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 38 sources compiled; first blocker `_operator.c(1402)` C2275/C2146/C2065 for post-statement `Py_ssize_t nargs`; later blockers at `(1556)`, `(1594)`, `(1811)`, and `(1884)`; summary `total=39 compiled=38 cached=0 skipped=0`.
focused Codex lane	exit 0; added the focused assertion, reported the expected RED failure, applied only the `attrgetter_vectorcall()` declaration-order edit, ran GREEN, regenerated the compatibility patch, and made no commit/push/publication.
focused RED assertion	exit 1 as required by TDD; `AssertionError: attrgetter_vectorcall needs an opening C89 nargs declaration and original-point assignment`.
focused GREEN assertion	exit 0; `ok - attrgetter_vectorcall uses an opening C89 nargs declaration and original-point assignment`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including the new `attrgetter_vectorcall` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past line 1402. The next first blocker is the distinct designated initializer at `(1558)`; later blockers remain at `(1596)`, `(1813)`, and `(1886)`; summary `total=39 compiled=38 cached=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff passed `--check` and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: attrgetter_vectorcall() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _operator.c(1558), the distinct designated-initializer family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `attrgetter_new()` C89 declaration-order slice)

Date: 2026-09-20 22:30 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 38 sources compiled, and _operator.c(1311) was the first stable blocker. One focused Codex coding lane implemented only this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. The lane reported the required RED focused assertion before the source edit and GREEN afterward; no independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — hoisted _operator_state *state into attrgetter_new()'s opening declaration group and changed its initializer to an assignment at the original module-state lookup point. Attribute-chain construction and allocation behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call .../VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 38 sources compiled; first blocker `_operator.c(1311)` C2275/C2065 for post-statement `_operator_state *state`; later blockers at `(1401)`, `(1555)`, `(1593)`, `(1810)`, and `(1883)`; summary `total=39 compiled=38 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, performed the requested RED/GREEN TDD cycle, applied only the `attrgetter_new()` declaration-order edit, regenerated the compatibility patch, and made no commit/push/publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including `attrgetter_new uses an opening C89 state declaration and original-point assignment`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past line 1311. The next first blocker is the distinct `itemgetter_vectorcall()` declaration-order family at `(1402)` with C2275/C2146/C2065; later blockers remain at `(1556)`, `(1594)`, `(1811)`, and `(1884)`; summary `total=39 compiled=38 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff passed `--check` and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: attrgetter_new() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _operator.c(1402), the distinct itemgetter_vectorcall() declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `itemgetter_type_spec` positional-initializer slice)

Date: 2026-09-20 20:20 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and was no longer the active frontier: _blake2/blake2s_impl.c compiled, 38 sources compiled, and _operator.c remained first. The first stable blocker was the distinct C99 designated initializer in itemgetter_type_spec at _operator.c(1189). The Hermes delegation tool failed before launch because the runtime lacks the anthropic package. One focused external Codex coding lane then implemented this exact TDD slice, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — converted itemgetter_type_spec from designated fields to declared-order positional fields; values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 38 sources compiled; first blocker `_operator.c(1189)` C2059 for the designated initializer; later blockers at `(1311)`, `(1401)`, `(1555)`, `(1593)`, `(1810)`, and `(1883)`; summary `total=39 compiled=38 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, performed the requested RED/GREEN TDD cycle, changed only `itemgetter_type_spec`, regenerated the compatibility patch, and made no commit/push/publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`, including `itemgetter_type_spec uses a C89-compatible declared-order positional initializer`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_operator.c` compiled past line 1189. The next first blocker is the distinct mixed declaration at `(1311)` (`_operator_state *state`); later blockers remain at `(1401)`, `(1555)`, `(1593)`, `(1810)`, and `(1883)`; summary `total=39 compiled=38 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff passed `--check` and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: itemgetter_type_spec now compiles under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _operator.c(1311), the distinct C89 declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `itemgetter_vectorcall()` C89 declaration-order slice)

Date: 2026-09-20 18:11 UTC

The recorded frontier was force-re-probed first and remained applicable: 38 sources compiled and _operator.c remained first. The first stable defect family was MSVC6's rejection of itemgetter_vectorcall()'s post-statement Py_ssize_t nargs declaration at line 1081. The Hermes delegation path was unavailable because the runtime lacks the anthropic package. One focused Codex coding lane then implemented this exact TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — hoisted Py_ssize_t nargs into itemgetter_vectorcall()'s opening declaration group and changed its initializer to an assignment at the original evaluation point. Argument validation and call behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

||| Command | Result | ||---|---| || WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call .../VCVARS32.BAT && cl' | exit 0; banner Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 38 sources compiled; first blocker _operator.c(1081) C2275/C2146/C2065 for post-statement Py_ssize_t nargs; summary total=39 compiled=38 cached=0 skipped=0. | || Hermes focused delegation | failed before launch: The 'anthropic' package is required for the Anthropic provider; no child files were used. | || codex exec -s workspace-write --skip-git-repo-check ... | exit 0; delegated lane added the focused assertion, reported the required RED focused failure before the source edit, applied only the itemgetter_vectorcall() declaration-order edit, and regenerated the compatibility patch; no commit, push, or publication. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after implementation | exit 0; ALL TESTS PASSED, including itemgetter_vectorcall uses an opening C89 nargs declaration and original-point assignment. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after implementation | exit 2; _operator.c compiled past line 1081. The next first blocker is the distinct designated initializer at _operator.c(1189) (reported as line 1187 before the edit); later distinct blockers remain at (1311), (1401), (1555), (1810), and (1883). Summary total=39 compiled=38 cached=0 skipped=0. Existing warnings remain arraymodule.c(2247) C4761, audioop.c(1536)/(1609) C4761, faulthandler.c(542) C4047, and mathmodule.c(1336) C4113/C4133. | || bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh | exit 0; all applicable regression suites and shell syntax checks passed. | || git -C cpython diff --check; patch regeneration plus cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; nested source diff passed --check and the compatibility patch matches the complete nested source diff byte-for-byte. |

Current compile-frontier state: itemgetter_vectorcall() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct _operator.c designated initializer at line 1189. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_operator.c` `itemgetter_new()` C89 declaration-order slice)

Date: 2026-09-20 16:05 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: 38 sources compiled and _operator.c remained first. The first stable defect family was MSVC6's rejection of itemgetter_new()'s post-statement _operator_state *state declaration at line 1006. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/_operator.c — hoisted _operator_state *state into itemgetter_new()'s opening declaration group and changed its initializer to an assignment at the original module-state lookup point. Allocation and itemgetter behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 38 sources compiled; first blocker _operator.c(1006) C2275/C2065 for post-statement _operator_state *state; summary total=39 compiled=38 cached=0 skipped=0. | | codex exec -s workspace-write --skip-git-repo-check ... | exit 0; delegated lane added the focused assertion, reported the required RED focused failure before the source edit, applied only the itemgetter_new() declaration-order slice, regenerated the compatibility patch, and ran GREEN; no commit, push, or publication. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after implementation | exit 0; ALL TESTS PASSED, including itemgetter_new uses an opening C89 state declaration and original-point assignment. | | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after implementation | exit 2; _operator.c compiled past line 1006. The next first blocker is _operator.c(1081) C2275/C2146/C2065 for Py_ssize_t nargs; later distinct designated-initializer blockers remain at (1187), (1553), (1808), and (1881). Summary total=39 compiled=38 cached=0 skipped=0. Existing warnings remain arraymodule.c(2247) C4761, audioop.c(1536)/(1609) C4761, faulthandler.c(542) C4047, and mathmodule.c(1336) C4113/C4133. | | bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh | exit 0; all applicable regression suites and shell syntax checks passed. | | git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; nested source diff passed --check and the compatibility patch matches the complete nested source diff byte-for-byte. |

Current compile-frontier state: itemgetter_new() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _operator.c(1081), the distinct Py_ssize_t nargs declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_opcode.c` positional-initializer slice)

Date: 2026-09-20 13:38 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: 37 sources compiled and _opcode.c remained first. The first stable defect was MSVC6's rejection of opcodemodule's C99 designated initializer at line 104. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/_opcode.c — converted opcodemodule to declared-order positional fields, with explicit NULL values for omitted slots. Module metadata and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 37 sources compiled; first blocker `_opcode.c(104)` C2059 syntax error for `.m_name`; summary `total=38 compiled=37 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; delegated lane added the focused assertion, reported the required RED focused failure before the source edit, applied only the `_opcode.c` positional initializer, and ran GREEN; no commit, push, or publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `opcodemodule uses a C89-compatible declared-order positional initializer`.
`git diff --check`	exit 2 due only to pre-existing generated-patch trailing whitespace in `compat/msvc600/cpython-3.11.16-vc6-headers.patch`; source diff checks were run separately.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `_opcode.c` compiled successfully. The next first blocker is `_operator.c(1006)` with C89 mixed declaration errors, followed by distinct `_operator.c` designated initializers at `(1186)`, `(1552)`, `(1807)`, and `(1880)`; summary `total=39 compiled=38 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff passed `--check` and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: _opcode.c now compiles under MSVC6 (cl.exe 12.00.8804) through Wine after its designated-initializer family was removed. The next narrow frontier is _operator.c(1006), beginning with its distinct C89 declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mmap_gfind()` C89 declaration-order slice)

Date: 2026-09-20 09:21 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 36 sources compiled and mmapmodule.c remained first. The first stable defect family was MSVC6's rejection of the post-statement Py_ssize_t res declaration in mmap_gfind(). One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/mmapmodule.c — hoisted Py_ssize_t res into mmap_gfind()'s opening declaration group and removed the later declaration. Search result assignments and control flow are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declaration and unchanged branch assignments.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 36 sources compiled; first stable blocker `mmapmodule.c(357)` C2275/C2146/C2065 for post-statement `Py_ssize_t res`; later designated-initializer blockers remained at `(1207)` and `(1788)`; summary `total=37 compiled=36 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; delegated lane added the focused assertion and implemented only the `mmap_gfind()` declaration-order slice; no commit, push, or publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `mmap_gfind uses an opening C89 res declaration and original-point assignments`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `mmap_gfind()` compiled past the declaration-order family. The next first blockers are the distinct designated initializers at `mmapmodule.c(1207)` and `(1788)`; summary `total=37 compiled=36 cached=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and `mathmodule.c(1336)` C4113/C4133.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the nested source diff passed `--check` and the compatibility patch matches the complete nested source diff byte-for-byte. The generated patch retains pre-existing whitespace-only lines, so checking the patch file itself with outer `git diff --check` reports those inherited lines.

Current compile-frontier state: mmap_gfind() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct designated-initializer family in mmapmodule.c at lines 1207 and 1788. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mmap_close_method()` C89 declaration-order slice)

Date: 2026-09-20 07:13 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 36 sources compiled and mmapmodule.c remained first. The first stable defect family was MSVC6's rejection of post-statement declarations in mmap_close_method(). One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/mmapmodule.c — hoisted the Windows-only HANDLE map_handle, HANDLE file_handle, and char *data declarations before executable statements, then assigned them at their original evaluation point. Resource cleanup order and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the C89-safe declarations and original-point assignments.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 36 sources compiled; first stable blocker `mmapmodule.c(194)` C2275/C2146/C2065 for post-statement `HANDLE` declarations, with later distinct blockers at `(352)`, `(1202)`, and `(1783)`; summary `total=37 compiled=36 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; delegated lane added the focused assertion, reported the required RED failure before the source edit, applied only the `mmap_close_method()` declaration-order slice, and reported GREEN; no commit, push, or publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `mmap_close_method uses C89-safe Windows declarations and original-point assignments`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `mmap_close_method()` compiled past the declaration-order family. The next first blocker is `mmapmodule.c(357)` C2275/C2146/C2065 for `Py_ssize_t res`; later distinct designated initializers remain at `(1207)` and `(1788)`. Summary `total=37 compiled=36 cached=0 skipped=0`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: mmap_close_method() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct Py_ssize_t res declaration-order family in mmapmodule.c(357). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mmapmodule.c` MSVC6 `PY_LONG_LONG` spelling slice)

Date: 2026-09-20 05:03 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 36 sources compiled and mmapmodule.c remained first. The first stable defect family was MSVC6's rejection of long long spellings in the Windows mmap offset/size declarations and casts. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/mmapmodule.c — replaced the five active Windows long long declarations/casts with PY_LONG_LONG; behavior and arithmetic are unchanged. The explanatory comment remains untouched.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the mmap 64-bit spellings and size-combining casts.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 36 sources compiled; first stable blocker `mmapmodule.c(103)` C2632 (`'long' followed by 'long' is illegal`), with later declaration-order/designated-initializer diagnostics; summary `total=37 compiled=36 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; delegated lane added the focused assertion, reported the required RED focused failure before the source edit, applied only the mmap `PY_LONG_LONG` spelling slice, and ran GREEN; no commit, push, or publication.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `mmap preserves signed 64-bit sizes and offsets using PY_LONG_LONG`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after implementation	exit 2; `mmapmodule.c` compiled past the `long long` family. The next first blocker is `mmapmodule.c(194)` C2275/C2146/C2065 for post-statement `HANDLE` declarations; later distinct blockers remain at `(352)`, `(1202)`, and `(1783)`. Summary `total=37 compiled=36 cached=0 skipped=0`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: mmapmodule.c now compiles through its MSVC6 long long spelling family under cl.exe 12.00.8804 through Wine. The next narrow frontier is the distinct C89 declaration-order/API family at mmapmodule.c(194). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`md5module.c` `_md5module` positional-initializer slice)

Date: 2026-09-20 02:55 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; independently verified compiler banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first, but it was no longer the active frontier: 36 sources compiled and md5module.c remained first. The first stable blocker was the distinct C99 designated initializer in _md5module at line 612. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/md5module.c — replaced _md5module's designated fields with declared-order positional fields, including the explicit NULL m_doc field. Values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 35 sources compiled; first blocker `md5module.c(612)` C2059 `syntax error: '.'`; summary `total=36 compiled=35 cached=0 skipped=0`. Existing warnings remained in `arraymodule.c`, `audioop.c`, `faulthandler.c`, and `mathmodule.c`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; delegated lane added the focused assertion, reported the required RED focused failure before the source edit, applied only the `_md5module` positional initializer, ran GREEN, and did not commit, push, or publish.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `_md5module uses a C89-compatible declared-order positional initializer`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `md5module.c` compiled past line 612. The next first blocker is `mmapmodule.c(103)` C2632 (`'long' followed by 'long' is illegal`), followed by distinct declaration-order and designated-initializer diagnostics; summary `total=37 compiled=36 cached=0 skipped=0`.
`bash scripts/vc6-probe.sh`	exit 0; the independent `Programs/python.c` probe still links no artifact and its compile-only `cl.exe` invocation exited 0.
`wine cmd /c 'call .../VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites; `git -C cpython diff --check`; patch regeneration and `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; all applicable suites passed and the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: _md5module now compiles through its designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct mmapmodule.c(103) long long spelling family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`md5module.c` `_md5_md5_impl` C89 declaration-order slice)

Date: 2026-09-20 00:46 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the recorded compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded md5module.c frontier was force-re-probed first and remained applicable: 35 sources compiled and md5module.c remained first. The first stable blocker was the distinct C89 declaration-order error at _md5_md5_impl() line 528 for MD5State *st; the later designated initializer at line 611 was left untouched. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/md5module.c — moved MD5State *st into the opening declaration group and changed its initializer to an assignment after buffer acquisition. Evaluation order and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 35 sources compiled; first blocker `md5module.c(528)` C2143/C2065 for the post-statement `MD5State *st`; the later designated initializer was reported at `(611)`; summary `total=36 compiled=35 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, performed the requested red/green TDD cycle, made only the `_md5_md5_impl` declaration-order edit, and did not commit, push, or publish.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including the new `_md5_md5_impl` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `md5module.c` compiled past line 528. The next first blocker is the distinct designated initializer at `(612)`; summary `total=36 compiled=35 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and the `mathmodule.c(1336)` C4113/C4133 pair.
full applicable regression command (`bash -n` plus public/core/PathCch/getpath/stdint/frontier suites)	exit 0; all applicable suites passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the compatibility patch matches the complete nested source diff byte-for-byte.

Current compile-frontier state: _md5_md5_impl() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct md5_type_spec-adjacent designated initializer at md5module.c(612). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`md5module.c` `md5_type_spec` positional-initializer slice)

Date: 2026-09-19 22:39 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: 35 sources compiled and md5module.c remained first. The prior MD5_INT64 defect was already cleared. The first stable blocker was the distinct C99 designated initializer in md5_type_spec at line 498. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout, preserving local changes and avoiding commits, pushes, and publication. No independent review is claimed.

This slice changed only:

cpython/Modules/md5module.c — replaced md5_type_spec's designated fields with declared-order positional fields, including the zero itemsize field; values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion for the positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 35 sources compiled; first blocker `md5module.c(498)` C2059 for the designated initializer, followed by declaration-order errors at `(527)` and another designated initializer at `(610)`; summary `total=36 compiled=35 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; added the focused assertion, performed the requested red/green TDD cycle, made only the `md5_type_spec` positional-initializer edit, and did not commit, push, or publish.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including the new `md5_type_spec` assertion.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `md5module.c` compiled past line 498. Next first blocker is the distinct C89 declaration-order error at `(527)` for `MD5State *st`; the later designated initializer remains at `(611)`; summary `total=36 compiled=35 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, `faulthandler.c(542)` C4047, and the `mathmodule.c(1336)` C4113/C4133 pair.
full applicable regression command (`bash -n` plus public/core/PathCch/getpath/stdint/frontier suites)	exit 0; all applicable suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; the compatibility patch matches the complete nested source diff byte-for-byte. `git -C cpython diff --check` also exited 0.

Current compile-frontier state: md5_type_spec now compiles through its designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct MD5State *st declaration-order family at md5module.c(527). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`md5module.c` `MD5_INT64` VC6 64-bit spelling slice)

Date: 2026-09-19 20:30 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before this run, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the independently verified banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded mathmodule.c fast_comb_limits2 frontier was force-re-probed first and remained applicable: 35 sources compiled and md5module.c was the first blocker. The first stable defect was the distinct VC6 long long spelling failure at md5module.c(36) C2632. One focused Codex coding-agent delegation implemented exactly this TDD slice in the existing checkout; it preserved local changes and did not commit, push, or publish. No independent review is claimed.

This slice changed only:

cpython/Modules/md5module.c — changed typedef long long MD5_INT64 to typedef PY_LONG_LONG MD5_INT64; MD5 layout and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added one focused structural assertion requiring the compiler-compatible typedef.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 35 sources compiled; first blocker md5module.c(36) C2632 for long long; later blockers at (498) designated initializer, (527) mixed declaration, and (610) designated initializer; summary total=36 compiled=35 cached=0 skipped=0. | | codex exec -s workspace-write --skip-git-repo-check ... | exit 0; added the focused assertion, ran the required RED test, made the minimal typedef edit, and ran GREEN; no commit/push/publish. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the assertion, before source edit | exit 1 as required by TDD; only the new assertion failed: MD5_INT64 must use CPython's compiler-compatible PY_LONG_LONG. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | exit 0; ALL TESTS PASSED. | | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | exit 2; md5module.c compiled past the long long family. Next first blocker is the distinct designated initializer at (498), followed by declaration-order errors at (527) and another designated initializer at (610); summary total=36 compiled=35 cached=0 skipped=0. Existing warnings remain mathmodule.c(1336) C4113/C4133, arraymodule.c(2247) C4761, audioop.c(1536)/(1609) C4761, and faulthandler.c(542) C4047. | | bash -n plus public/core/PathCch/getpath/stdint/frontier regression suites | exit 0; all applicable suites passed and the focused frontier suite ended with ALL TESTS PASSED. | | git diff --check; git -C cpython diff --check; patch regeneration plus cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; nested source diff is clean and the compatibility patch matches the complete nested source diff byte-for-byte. |

Current compile-frontier state: md5module.c now compiles through the distinct VC6 long long spelling family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the designated initializer at md5module.c(498). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `perm_comb_small` `fast_comb_limits2` C89 declaration-order slice)

Date: 2026-09-19 18:22 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read before changes. The nested cpython/ checkout remains detached with all pre-existing local port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c was first. The first stable blocker was the C89 declaration-order defect at mathmodule.c(3528)–(3532): fast_comb_limits2 was declared after executable statements in perm_comb_small(). One focused coding-agent delegation was attempted; the Hermes delegation path failed because the runtime lacks the anthropic package. A direct Codex coding lane then added the focused regression assertion and ran the required red test, but stopped for confirmation because the array is static const; the minimal source edit was completed without broadening scope. No commits, pushes, or publication occurred.

This slice changed only:

cpython/Modules/mathmodule.c — moved the complete static const fast_comb_limits2[] initializer into perm_comb_small()'s opening declaration group and removed the later declaration. The array contents, lookup, and control flow are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused structural assertion.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | ||---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 34 sources compiled; first stable blocker mathmodule.c(3528) C2143 and (3532) C2065/C2109 for fast_comb_limits2; later diagnostics began at (3605); summary total=35 compiled=34 cached=0 skipped=0. | || Hermes focused delegation | failed before launch: The 'anthropic' package is required for the Anthropic provider; no child files were used. | || direct codex exec -s workspace-write --skip-git-repo-check ... | exit 0; added the focused assertion and ran it red with the expected fast_comb_limits2 missing-declaration assertion; source remained unchanged when the lane stopped for confirmation. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | exit 0; ALL TESTS PASSED, including perm_comb_small uses a C89 declaration-order-safe fast_comb_limits2 array. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | exit 2; mathmodule.c compiled past this family. Next first stable blocker is md5module.c(36) C2632 for long long, followed by a designated initializer at (498) and declaration-order errors at (527); summary total=36 compiled=35 cached=0 skipped=0. Existing warnings remain mathmodule.c(1336) C4113/C4133, arraymodule.c(2247) C4761, audioop.c(1536)/(1609) C4761, and faulthandler.c(542) C4047. | || full applicable regression command (bash -n plus public/core/PathCch/getpath/stdint/frontier suites) | exit 0; all suites passed and the focused frontier suite ended with ALL TESTS PASSED. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; regenerated patch matches the complete nested source diff byte-for-byte. git -C cpython diff --check also exited 0. |

Current compile-frontier state: perm_comb_small() now compiles through its fast_comb_limits2 C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is md5module.c(36), beginning with the distinct VC6 long long family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `_check_long_mult_overflow` C89 declaration-order slice)

Date: 2026-09-19 16:11 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains external/local-only through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded math_isqrt() frontier was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was the distinct C89 declaration-order family in _check_long_mult_overflow() at lines 3186–3190. One focused Codex coding-agent delegation ran in the existing checkout with the requested scope, preserved local changes, and did not commit, push, or publish. The child added the focused assertion and implementation; no independent review is claimed.

This slice changed only the following:

cpython/Modules/mathmodule.c — hoisted diff, absdiff, and absprod into _check_long_mult_overflow()'s opening declaration group and changed their original initializers to assignments at the same evaluation point. Overflow comparison and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused assertion for the opening declarations, assignment order, and unchanged return logic.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(3186)`–`(3190)` C2143/C2065 for the three post-statement `const double` declarations; later blockers at `(3525)` and `(3602)`; summary `total=35 compiled=34 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; focused implementation completed in the existing checkout; no commit, push, or publish.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after implementation	exit 0; `ALL TESTS PASSED`, including `_check_long_mult_overflow uses opening C89 declarations and original-point assignments`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after this slice	exit 2; `_check_long_mult_overflow()` compiled past this family. Next first stable blocker is the distinct declaration-order family at `mathmodule.c(3528)`–`(3532)` involving `fast_comb_limits2`; later diagnostics remain at `(3605)` onward. Summary `total=35 compiled=34 cached=0`. Existing warnings include `mathmodule.c(1336)` C4113/C4133, `arraymodule.c(2247)` C4761, `audioop.c(1536)`/`(1609)` C4761, and `faulthandler.c(542)` C4047.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested source diff.

Current compile-frontier state: _check_long_mult_overflow() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is mathmodule.c(3528)–(3532), the fast_comb_limits2 declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `math_isqrt` C89 loop-counter slice)

Date: 2026-09-19 14:02 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified compiler remains MSVC6 12.00.8804 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was the distinct C99 loop-counter declaration at mathmodule.c(1945). One focused Codex coding-agent delegation ran in the existing checkout with the requested scope, preserved local changes, implemented only this slice, and did not commit, push, or publish. The child reported the required red-then-green focused TDD cycle; independent verification below confirms the green result. No independent review is claimed.

This slice changed only the following:

cpython/Modules/mathmodule.c — added int s to math_isqrt()'s opening declaration group and changed for (int s = ...) to for (s = ...); loop behavior is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused assertion for the C89-safe math_isqrt() loop counter.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 34 sources compiled; first stable blocker mathmodule.c(1945) C2143/C2065/C2059/C2143 for the C99 for (int s = ...); later blockers at (3185), (3524), and (3601); summary total=35 compiled=34 cached=0. | | focused Codex delegation: codex exec -s workspace-write --skip-git-repo-check ... | exit 0; child performed the requested focused TDD implementation, with no commit/push/publish. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after implementation | exit 0; ALL TESTS PASSED, including math_isqrt uses an opening C89 loop counter declaration. | | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after this slice | exit 2; mathmodule.c compiled past line 1945. Next first stable blocker is the distinct declaration-order family at (3186)–(3190) (perm_comb_small()); later blockers are (3525) and (3602). Summary total=35 compiled=34 cached=0. Existing warnings remain mathmodule.c(1336), arraymodule.c(2247), audioop.c(1536), (1609), and faulthandler.c(542). | | bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh | exit 0; all applicable regression suites and shell syntax checks passed. | | git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; patch exactly matches the complete nested source diff. |

Current compile-frontier state: math_isqrt() now compiles through its C89 loop-counter family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is perm_comb_small() at mathmodule.c(3186)–(3190). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c guarded VC6` expm1` fallback slice)

Date: 2026-09-19 11:54 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified compiler remains MSVC6 12.00.8804 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was the distinct missing-VC6-CRT expm1 family at line 1350. One focused coding-agent delegation was attempted as required but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This slice addressed only expm1; later declaration-order blockers remain untouched.

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_expm1() fallback using a small-input quadratic approximation and exp(x) - 1.0; routed only FUNC1(expm1, ...) through it. Native compilers retain the CRT path through #define m_expm1 expm1.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback, small-input handling, native mapping, and routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(1350)` C2065 for unavailable `expm1`; later declaration-order blockers at `(1936)`, `(3176)`, `(3515)`, and `(3592)`; summary `total=35 compiled=34 cached=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_expm1 fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `expm1`; next first stable blocker is the distinct declaration-order family at `(1945)`, with later families at `(3185)`, `(3524)`, and `(3601)`; summary `total=35 compiled=34 cached=0`. Existing warnings remain `mathmodule.c(1336)`, `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch exactly matches the complete nested source diff.

Current compile-frontier state: expm1 now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the declaration-order family in mathmodule.c at line 1945. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` guarded VC6 `exp2` fallback slice)

Date: 2026-09-19 09:46 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified compiler remains MSVC6 12.00.8804 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was the distinct missing-VC6-CRT exp2 family at line 1336. One focused coding-agent delegation was attempted as required but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This slice addressed only exp2; expm1 and later declaration-order blockers remain untouched.

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_exp2() fallback using exp(x * log(2.0)) with NaN preservation; routed only FUNC1(exp2, ...) through it. Native compilers retain the CRT path through #define m_exp2 exp2.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback, NaN handling, native mapping, and routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(1336)` C2065 for unavailable `exp2`; `expm1` followed at `(1341)`; summary `total=35 compiled=34 cached=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_exp2 fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `exp2`; next first stable blocker is unavailable `expm1` at `(1350)`, followed by distinct declaration-order blockers at `(1936)`, `(3176)`, `(3515)`, and `(3592)`; summary `total=35 compiled=34 cached=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch exactly matches the complete nested source diff.

Current compile-frontier state: exp2 now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the missing-CRT expm1 family at mathmodule.c(1350). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `math_ceil` C89 declaration-order slice)

Date: 2026-09-19 06:00 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changes, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified compiler remains MSVC6 12.00.8804 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was the distinct C89 declaration-order defect in math_ceil() at line 1306. One focused Codex coding-agent delegation was run in workspace-write mode with the existing checkout; it preserved local changes, implemented only this slice, and did not commit, push, or publish. This slice addressed only math_ceil(); later copysign, exp2, expm1, and other mathmodule blockers remain untouched.

cpython/Modules/mathmodule.c — hoisted double x into math_ceil()'s opening declaration group and changed its initializer to an assignment at the original evaluation point. Lookup, conversion, error handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the opening declaration and original-point assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(1306)` C2143/C2065 for `double x`; later distinct blockers at `(1317)`, `(1335)`, `(1340)`, `(1926)`, `(3166)`, `(3505)`, and `(3582)`; summary `total=35 compiled=34 cached=0`.
`codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; focused TDD implementation completed; the child reported the expected red assertion before the source edit and green focused test afterward; no commit/push/publish.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the slice	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the slice	exit 2; `math_ceil()` compiled past this family. The next first stable blocker is unavailable VC6 CRT `exp2` at `mathmodule.c(1336)`; `expm1` follows at `(1341)`, with later distinct declaration-order blockers. Summary `total=35 compiled=34 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch exactly matches the complete nested source diff.

Current compile-frontier state: math_ceil() now compiles through its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the missing-CRT exp2 family at mathmodule.c(1336). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` guarded VC6 `cbrt` fallback slice)

Date: 2026-09-19 05:29 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport. PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read before changes.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c was first. The first stable blocker was unavailable VC6 CRT cbrt at the prior line 1259. One focused coding-agent delegation was attempted for implementation but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This slice addressed only cbrt.

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_cbrt() using fabs/log/exp, preserving NaN, signed zero, infinity, and sign handling; routed only FUNC1(cbrt, ...) through it. Native compilers retain the CRT path through #define m_cbrt cbrt.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback, special-value handling, native mapping, and routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable diagnostic `mathmodule.c(1259)` C2065 for unavailable `cbrt`, followed by distinct declaration-order and `exp2`/`expm1` blockers; summary `total=35 compiled=34 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_cbrt fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `cbrt`; next first stable blocker is `math_ceil()`'s post-statement `double x` declaration at `(1306)`, followed by distinct blockers at `(1317)`, `(1335)`, `(1340)`, `(1926)`, `(3166)`, `(3505)`, and `(3582)`; summary `total=35 compiled=34 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s` verification	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: cbrt now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct C89 declaration-order blocker in math_ceil() at mathmodule.c(1306). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` guarded VC6 `atanh` fallback slice)

Date: 2026-09-19 03:21 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 34 sources compiled, and mathmodule.c remained first. The first stable blocker was the distinct missing-VC6-CRT math-function family: atanh at line 1233 before this slice, followed by cbrt at line 1236 and later declaration-order families. One focused read-only Codex coding-agent delegation inspected this exact frontier, made no edits, and recommended the isolated m_atanh fallback. No independent implementation review is claimed beyond that advisory inspection.

This run addressed only atanh:

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_atanh() using the stable logarithmic formulation with small-input preservation, signed-zero/NaN handling, and EDOM for abs(x) >= 1; routed only FUNC1(atanh, ...) through it. Native compilers retain the CRT atanh path through #define m_atanh atanh.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback, native mapping, domain handling, and routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable diagnostics `mathmodule.c(1233)` C2065 for `atanh`, then `cbrt` at `(1236)` and later distinct declaration-order blockers; summary `total=35 compiled=34 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended only the guarded `m_atanh` fallback and `FUNC1(atanh, m_atanh, 0, ...)`; no files changed, no broad build run.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_atanh fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `atanh`; next first stable blocker is unavailable `cbrt` at `(1259)`; later distinct blockers remain at `(1288)`, `(1908)`, `(3148)`, `(3487)`, and `(3564)`; summary `total=35 compiled=34 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s` verification	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: atanh now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the remaining missing-CRT cbrt family at mathmodule.c(1259); exp2 and expm1 remain distinct later blockers. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` guarded VC6 `asinh` fallback slice)

Date: 2026-09-19 01:12 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 34 sources compiled, and mathmodule.c remained first. The first stable blocker was the distinct missing-VC6-CRT math-function family, with asinh first at line 1212 before this slice. One focused coding-agent delegation was attempted for advisory inspection but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This run addressed only asinh; atanh, cbrt, exp2, expm1, and later declaration-order blockers remain untouched.

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_asinh() implementation using sign symmetry, a large-argument overflow-safe branch, and the standard logarithmic form; routed only FUNC1(asinh, ...) through it. Native CRT paths and later math functions remain unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback and explicit m_asinh routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable diagnostics `mathmodule.c(1212)` C2065 for `asinh`, followed by `atanh` at `(1223)`, `cbrt` at `(1226)`, and later distinct families; summary `total=35 compiled=34 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_asinh fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `asinh`; next first stable blockers are unavailable `atanh` at `(1233)` and `cbrt` at `(1236)`; summary `total=35 compiled=34 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all applicable suites passed and the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; patch regeneration plus `cmp -s` verification	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: asinh now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the remaining missing-CRT math family beginning with atanh; cbrt, exp2, and expm1 remain distinct later blockers. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` guarded VC6 `acosh` fallback slice)

Date: 2026-09-18 23:05 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine using WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled, 34 sources compiled, and mathmodule.c remained first. The first stable blocker was the distinct missing-VC6-CRT math-function family; acosh was the first error at line 1192 in the prior probe. One focused read-only Codex coding-agent delegation inspected this exact family, made no edits, and recommended a single guarded m_acosh fallback while leaving asinh, atanh, and cbrt for later slices. This run addressed only acosh.

cpython/Modules/mathmodule.c — added an _MSC_VER < 1300-guarded m_acosh() implementation with domain-error handling and overflow-safe large-argument branch; routed only FUNC1(acosh, ...) through it. The native CRT paths and the later missing functions remain untouched.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded fallback and explicit m_acosh routing.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first blocker `mathmodule.c(1192)` C2065 for `acosh`, with later `asinh`, `atanh`, `cbrt`, `exp2`, `expm1`, and distinct declaration-order blockers; summary `total=35 compiled=34 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended only a guarded `m_acosh` fallback and `FUNC1(acosh, m_acosh, 0, ...)`; no files changed and no build run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `VC6 m_acosh fallback missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `mathmodule.c` compiled past `acosh`; next first stable blockers are `asinh` at line 1212, `atanh` at 1223, and `cbrt` at 1226; summary `total=35 compiled=34 cached=0 skipped=0`.
`bash -n` plus public/core/PathCch/getpath/stdint regression suites	exit 0; all applicable suites passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s` verification	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: acosh now compiles through the guarded VC6 fallback under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the remaining missing-CRT math family beginning with asinh; atanh, cbrt, exp2, and expm1 remain distinct later blockers. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `math_lcm` C89 declaration-order slice)

Date: 2026-09-18 20:56 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, this file, README.md, and references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The verified MSVC6 compiler remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport.

The recorded frontier was force-re-probed first and remained applicable: 34 sources compiled and mathmodule.c remained first. The first stable blocker was math_lcm()'s post-statement borrowed zero declaration at line 946. One focused read-only Codex delegation inspected this exact function, made no edits, and recommended hoisting only zero while preserving the assignment point. This slice addressed only that C89 declaration-order family; mathmodule.c's later distinct blockers remain untouched.

cpython/Modules/mathmodule.c — added zero to math_lcm()'s opening declaration group and changed its later declaration initializer to an assignment at the original point. Borrowed-reference ownership and loop behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the declaration, assignment, and borrowed-reference shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(946)` C2275/C2065 for `PyObject *zero`, followed by distinct blockers at `(1192)`, `(1242)`, `(1862)`, `(3102)`, `(3441)`, and `(3518)`; summary `total=35 compiled=34 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended moving `zero` into `PyObject res, x, *zero;` and assigning `zero = _PyLong_GetZero();`; no files changed and no build run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `math_lcm zero declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `math_lcm()` compiled past this defect family. The next first stable blocker is `mathmodule.c(1192)` C2065 for unavailable `acosh`; summary `total=35 compiled=34 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n` on frontier scripts plus public/core/PathCch/getpath/stdint regression suites	exit 0; all applicable suites passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s` verification	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: math_lcm() now compiles past its borrowed-local C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct mathmodule.c(1192) missing-acosh family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`mathmodule.c` `math_gcd` C89 declaration-order slice)

Date: 2026-09-18 18:48 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first, but the recorded itertoolsmodule.c frontier was no longer current: the actual first stable blocker was mathmodule.c. The first defect family was math_gcd()'s post-statement borrowed singleton declaration at line 871. One focused read-only Codex delegation inspected this exact function, made no edits, and recommended hoisting only one while preserving the assignment point. This slice addressed only that C89 declaration-order family.

cpython/Modules/mathmodule.c — added one to math_gcd()'s opening declaration group and changed its later declaration initializer to an assignment at the original point. Borrowed-reference handling, early returns, and loop behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 34 sources compiled; first stable blocker `mathmodule.c(871)` C2275/C2065 for `PyObject *one`, followed by distinct blockers at `(946)`, `(1192)`, `(1242)`, `(1862)`, `(3102)`, `(3441)`, and `(3518)`; summary `total=35 compiled=34 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended moving `one` into `PyObject res, x, *one;` and assigning `one = _PyLong_GetOne();`; no files changed and no build run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `math_gcd one declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `math_gcd()` compiled past this defect family. The next first stable blocker is `mathmodule.c(946)` C2275/C2065 for `math_lcm()`'s distinct post-statement `zero` declaration; summary `total=35 compiled=34 cached=0 skipped=0`. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh`, public/core/PathCch/getpath/stdint/frontier regression suites, `git -C cpython diff --check`, and patch `cmp -s` verification	exit 0; all applicable checks passed and the compatibility patch exactly matches the complete nested source diff.

Current compile-frontier state: math_gcd() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is math_lcm() at mathmodule.c(946), beginning with its distinct borrowed zero declaration. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`gcmodule.c` duplicate declaration slice)

Date: 2026-09-18 16:40 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 30 sources compiled, including faulthandler.c and gcmodule.c. The first stable gcmodule.c diagnostic was a duplicate PyGC_Head *gc, *next declaration in clear_unreachable_mask() at lines 707 and 711. A focused coding-agent delegation was attempted for advisory inspection but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This slice addressed only that duplicate-declaration family.

cpython/Modules/gcmodule.c — removed the second, redundant PyGC_Head *gc, *next declaration from clear_unreachable_mask(). The declaration group and control flow are otherwise unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring exactly one declaration of the local pair.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; summary `total=31 compiled=30 cached=0 skipped=0`; first stable diagnostics were `gcmodule.c(711)` C2143, followed by distinct diagnostics at `(1065)`, `(1180)`, and `(1293)`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `clear_unreachable_mask duplicate local declaration`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `gcmodule.c` compiled past the duplicate declaration. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, `(1609)`, and `faulthandler.c(542)`. The next first stable blocker is `cpython/Modules/itertoolsmodule.c`, with C2275/C2065 at line 883 and C2143/C2065/C2059 loop-declaration diagnostics at line 4878; summary `total=33 compiled=32 cached=0 skipped=0`.
full applicable regression suites and shell syntax checks	exit 0; public/core/PathCch/getpath/stdint/frontier suites all passed.
`git -C cpython diff --check`; patch regeneration plus `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; nested source diff is clean and the compatibility patch exactly matches the complete nested diff.

Current compile-frontier state: gcmodule.c now compiles past its duplicate-local declaration family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is itertoolsmodule.c at line 883, beginning with its post-statement PyObject *dataobj declaration; the later C99 loop family at line 4878 is distinct. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`faulthandler.c` VC6 declaration/API compatibility slices)

Date: 2026-09-18 16:03 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport.

This continuation cleared the remaining reported faulthandler.c compile errors without changing its core control flow:

Converted Windows exception-handler, traceback, disable-loop, and SIGFPE locals to VC6/C89 declaration order.
Guarded abort behavior flags unavailable in the MSVC6 CRT.
Replaced the Py_FatalError use that expands through unsupported __func__ with an explicit _Py_FatalErrorFunc call.
Replaced the faulthandler module's designated initializer with positional fields.
Hoisted faulthandler_init_enable() locals.

Exact verified result:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2; summary `total=31 compiled=30 cached=0 skipped=0`
Current first blocker	`cpython/Modules/gcmodule.c`

The next file contains many independent C89 declaration-order and control-flow failures, including errors around lines 1456, 1530, 1600, 1681, 1686, and 1714. No speculative broad edit was made.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetime_exec`, datetime module definition, and errno VC6 slice)

Date: 2026-09-18 15:44 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport.

This slice advanced the real pythoncore compile frontier from 27 to 29 compiled sources. It addressed only bounded VC6 compatibility families:

cpython/Modules/_datetimemodule.c: hoisted all _datetime_exec() locals before executable statements, preserved initializer/evaluation order, and replaced the module definition's C99 designated initializer with declared-order positional fields.
cpython/Modules/errnomodule.c: converted _add_errcode() and errno_exec() mixed declarations to C89 declaration order and replaced errnomodule's designated module initializer with positional fields.
scripts/vc6-probe-pythoncore-frontier.test.sh: added regression coverage for _datetime_exec()'s declaration family.
compat/msvc600/cpython-3.11.16-vc6-headers.patch: must be regenerated from the complete nested diff after this status update.

Exact verified results:

Command	Result
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; `ALL TESTS PASSED`
`bash -n` on frontier scripts plus existing probe/core/pathcch/getpath/stdint regression suites	exit 0; all applicable suites passed
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2; summary `total=30 compiled=29 cached=0 skipped=0`
Current first blocker	`cpython/Modules/faulthandler.c`

The next file is not a single narrow defect: the probe reports multiple independent MSVC6/Win9x issues in faulthandler.c, including C99 loop/mixed declarations, missing _WRITE_ABORT_MSG and _CALL_REPORTFAULT, missing __func__, volatile/declaration syntax failures, and a designated initializer at line 1335. No speculative broad edit was made.

This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`datetime_fromisoformat` C89 declaration-order slice)

Date: 2026-09-18 14:34 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(5518) C2275/C2065 for datetime_fromisoformat()'s post-statement dtstr_clean declaration, followed by its same-function declaration-order cascades. One focused read-only Codex coding-agent delegation inspected this exact function and recommended hoisting all function-scope locals while preserving each initializer's original execution point; it exited 0, made no file changes, and ran no builds. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted datetime_fromisoformat()'s locals into its opening declaration group and changed initialized declarations to assignments at their original execution points. Sanitization, UTF-8 conversion, separator detection, parsing, cleanup labels, reference counting, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration group, original-point assignments, and rejection of mixed declarations.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 27 sources compiled, and first stable diagnostics were `_datetimemodule.c(5518)` C2275/C2065 for `dtstr_clean`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended the minimal `datetime_fromisoformat()` hoist and original-point assignments; no files changed and no builds run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `datetime_fromisoformat declaration missing from opening group: PyObject *dtstr_clean;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `datetime_fromisoformat()` compiled past this family. The next first stable diagnostics are `_datetimemodule.c(6814)` C2275/C2065/C2059 for `_datetime_exec()`'s post-statement `PyTypeObject *types[]` declaration, followed by its C99 loop declaration; later distinct mixed declarations remain at `(6847)` and `(6875)`, and a designated initializer remains at `(7013)`. Summary `total=28 compiled=27 cached=0 skipped=0`. Existing C4761 warnings remain in `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and shell syntax checks passed; the focused frontier suite ended with `ALL TESTS PASSED`.
`git -C cpython diff --check`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; source diff is clean and the compatibility patch exactly matches the nested source diff.

Current compile-frontier state: datetime_fromisoformat() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _datetime_exec() at _datetimemodule.c(6814), beginning with the types[] declaration after executable statements. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` VC6 64-bit spelling/literal-suffix slice)

Date: 2026-09-18 10:17 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were the distinct VC6 long long/C99 literal-suffix family at _datetimemodule.c(5053)–(5074), followed by later declaration-order diagnostics. The required focused coding-agent delegation was attempted but could not launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the 64-bit spelling/literal-suffix family.

cpython/Modules/_datetimemodule.c — replaced this file's long long declarations with CPython's PY_LONG_LONG abstraction and its LL epoch literals with PY_LL(719163). Arithmetic, ranges, control flow, and API behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion rejecting long long/719163LL and requiring PY_LONG_LONG/PY_LL.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 27 sources compiled, and first stable diagnostics were `_datetimemodule.c(5053)`–`(5057)` C2632/C2059/C2146/C2143 for `long long` and `LL`, with later cascades; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `_datetimemodule long long keyword remains`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `_datetimemodule.c` compiled past the 64-bit spelling/literal-suffix family. The next first stable diagnostics are `_datetimemodule.c(5355)`/`(5356)` C2143 declaration-order errors; summary `total=28 compiled=27 cached=0 skipped=0`. Existing C4761 warnings remain in `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites, source checks, and nested source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated and exactly matches the complete nested source diff.

Current compile-frontier state: _datetimemodule.c now compiles past its VC6 long long/literal-suffix family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct C89 declaration-order family beginning at _datetimemodule.c(5355). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `time_fromisoformat` C89 declaration-order slice)

Date: 2026-09-18 08:10 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(4699) C2275/C2146/C2065 for time_fromisoformat()'s post-statement Py_ssize_t len declaration, followed by the same function's later locals. One focused read-only Codex coding-agent delegation inspected this exact function and recommended hoisting len, p, the integer locals, tzinfo, and t while preserving each initializer's original execution point; it made no file changes and ran no builds. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted time_fromisoformat() locals into its opening declaration group and changed the UTF-8 conversion, zero initialization, parser call, and timezone construction declarations into assignments at their original execution points. Parsing, error labels, reference counting, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declarations and assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 27 sources compiled, and first stable diagnostic `_datetimemodule.c(4699) C2275/C2146/C2065` for `Py_ssize_t len`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended the minimal `time_fromisoformat()` declaration hoist and original-point assignments; no files changed and no builds run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `time_fromisoformat declaration missing from opening group: Py_ssize_t len;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `time_fromisoformat()` compiled past this declaration-order family. The next first stable diagnostics are the distinct `long long`/literal-suffix family at `_datetimemodule.c(5053)`–`(5057)`; summary `total=28 compiled=27 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites, source checks, and nested source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated and exactly matches the complete nested source diff.

Current compile-frontier state: time_fromisoformat() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct _datetimemodule.c(5053) long long/integer-literal-suffix family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `date_isocalendar` C89 result-local slice)

Date: 2026-09-18 06:02 UTC

The recorded _blake2/blake2s_impl.c sequence was force-re-probed first and remained applicable: 27 sources compiled, with _datetimemodule.c still first. The first stable diagnostics were _datetimemodule.c(3513) C2275/C2065 for date_isocalendar()'s post-statement PyObject* v declaration. One focused coding-agent delegation was attempted as required but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This run addressed only that C89 declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted PyObject* v into date_isocalendar()'s opening declaration group and changed only the constructor declaration initializer to an assignment at the original call site. ISO calendar calculation, NULL handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the opening declaration and constructor assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostics `_datetimemodule.c(3513) C2275/C2065` for `PyObject* v`; summary `total=28 compiled=27 cached=0 skipped=0`. Existing warnings remained at `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)` C4761.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `date_isocalendar v declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `date_isocalendar()` compiled past this defect family. The next first stable diagnostics are `_datetimemodule.c(4699)` C2275/C2146/C2065 for a distinct declaration-order family; summary `total=28 compiled=27 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated and exactly matches the complete nested source diff.

Current compile-frontier state: date_isocalendar() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _datetimemodule.c(4699), a distinct declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `PyDateTime_IsoCalendarDateType` positional-initializer slice)

Date: 2026-09-18 03:54 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The existing modifications to scripts/vc6-probe-pythoncore-frontier.sh and all prior CPython edits were preserved. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostic was _datetimemodule.c(3426) C2059: syntax error '.' from the designated PyTypeObject initializer for PyDateTime_IsoCalendarDateType. One focused coding-agent delegation was attempted for advisory inspection but failed before launch because the runtime lacks the anthropic package; no child files were used and no independent review is claimed. This run addressed only that designated-initializer family.

cpython/Modules/_datetimemodule.c — replaced only PyDateTime_IsoCalendarDateType's C99 designated fields with declared-order positional PyTypeObject fields, matching the already-portable datetime type definitions. The type name, size, repr, flags, documentation, methods, getset, and constructor values are unchanged; previously implicit fields remain zero/NULL.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 27 sources compiled, and first stable diagnostic `_datetimemodule.c(3426) C2059` for the designated initializer; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `iso calendar date type positional initializer mismatch`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the designated-initializer blocker cleared and the next first stable diagnostic is `_datetimemodule.c(3513) C2275/C2065` for `PyObject* v` in `date_isocalendar()`; summary `total=28 compiled=27 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`; `cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated and exactly matches the complete nested source diff.

Current compile-frontier state: PyDateTime_IsoCalendarDateType now compiles past its C99 designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct post-statement PyObject* v declaration in date_isocalendar() at _datetimemodule.c(3513). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `iso_calendar_date_repr` C89 declaration-order slice)

Date: 2026-09-18 01:43 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(3349)/(3353) C2275/C2065 for iso_calendar_date_repr()'s post-statement week/weekday declarations. One focused read-only Codex delegation inspected this exact function and recommended hoisting those two declarations while preserving the lookup and NULL-check sequence; it made no file changes and ran no builds. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted PyObject* week and PyObject* weekday into iso_calendar_date_repr()'s opening declaration group and changed their initializers to assignments at the original evaluation points. Lookup order, NULL checks, and formatting behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled, 27 sources compiled, and first stable diagnostics were `_datetimemodule.c(3349)`/`(3353)` C2275/C2065 for `week`/`weekday`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended opening declarations for `week`/`weekday` and assignments at their original lookup points; no files changed and no builds run by the child. No independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `iso_calendar_date_repr declaration missing from opening group: PyObject* week;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `iso_calendar_date_repr()` compiled past this defect family. The next first stable diagnostic is `_datetimemodule.c(3426) C2059` for the distinct designated initializer in `PyDateTime_IsoCalendarDateType`; summary `total=28 compiled=27 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check && git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; all applicable regression suites, source checks, and patch regeneration passed.

Current compile-frontier state: iso_calendar_date_repr() now compiles past its week/weekday C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct designated initializer in PyDateTime_IsoCalendarDateType at _datetimemodule.c(3426). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `date_fromisocalendar` C89 declaration-order slice)

Date: 2026-09-17 23:34 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(3152)/(3153) C2143 for date_fromisocalendar()'s post-statement month/rv declarations. One focused read-only Codex delegation inspected this exact function and recommended hoisting the declarations while preserving the conversion call's execution point; no child files were changed and no independent review is claimed. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted int month and int rv into date_fromisocalendar()'s opening declaration group and changed int rv = iso_to_ymd(...) to rv = iso_to_ymd(...) at the original evaluation point. The conversion call, error handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled, including `_blake2/blake2s_impl.c`; first stable diagnostics `_datetimemodule.c(3152)`/`(3153)` C2143 and `(3156)`/`(3167)` cascades for `rv`/`month`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused read-only `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended opening declarations `int month; int rv;` and assignment `rv = iso_to_ymd(...)`; no files changed and no tests run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `date_fromisocalendar declaration missing from opening group: int month;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `date_fromisocalendar()` compiled past this defect family. The next first stable diagnostics are `_datetimemodule.c(3349)`/`(3353)` C2275/C2065 for `iso_calendar_date_repr()`'s post-statement `week`/`weekday` declarations; summary `total=28 compiled=27 cached=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.

Current compile-frontier state: date_fromisocalendar() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is iso_calendar_date_repr() at _datetimemodule.c(3349)/(3353), beginning with week/weekday. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `date_fromisoformat` C89 declaration-order slice)

Date: 2026-09-17 21:27 UTC

The recorded frontier was force-re-probed first and remained applicable: _blake2/blake2s_impl.c compiled successfully, 27 sources compiled, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(3095) for date_fromisoformat() declarations after executable statements. One focused Codex delegation was attempted in an isolated snapshot but failed before launch because the snapshot copy hit Disk quota exceeded; no child files were used and no independent review is claimed. This run addressed only the date_fromisoformat() declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted len, dt_ptr, year, month, day, and rv into date_fromisoformat()'s opening declaration group. Changed dt_ptr and date-local initialization to assignments at their original evaluation sequence; parsing, error handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled, including `_blake2/blake2s_impl.c`; first stable diagnostics `_datetimemodule.c(3095)` C2275/C2146/C2065 for `Py_ssize_t len`, followed by the distinct later declaration families; summary `total=28 compiled=27 cached=0 skipped=0`.
focused Codex delegation	exit 1 before launch: isolated snapshot copy failed with `Disk quota exceeded`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `date_fromisoformat declaration missing from opening group: Py_ssize_t len;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `date_fromisoformat()` compiled past this defect family. The next first stable diagnostics are `_datetimemodule.c(3152)`/`(3153)` C2143 and `(3156)` C2065 for the distinct `date_fromisocalendar()` declaration family; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus diff check	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` worktree at commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: date_fromisoformat() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is date_fromisocalendar() at _datetimemodule.c(3152)/(3153), beginning with its post-statement month/rv declarations. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `delta_repr` C89 declaration-order slice)

Date: 2026-09-17 19:20 UTC

The recorded frontier was force-re-probed first and remained applicable: 27 sources compiled, including _blake2/blake2s_impl.c, and _datetimemodule.c remained first. The first stable diagnostics were _datetimemodule.c(2663)/(2670) for delta_repr()'s post-statement sep declaration, with a later repr declaration at (2697). One focused coding-agent delegation was attempted but failed before launch because the runtime lacks the anthropic package; no child files or independent review are claimed. This run addressed only the delta_repr() declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted const char *sep and PyObject *repr into delta_repr()'s opening declaration group; changed their initializers to assignments at the original evaluation points. Formatting, reference counting, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe delta_repr() declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled, including `_blake2/blake2s_impl.c`; first stable diagnostics `_datetimemodule.c(2663)`/`(2670)` C2143/C2065 for `sep`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `delta_repr declaration missing from opening group: const char *sep;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `delta_repr()` compiled past this defect family. The next first stable diagnostics are `_datetimemodule.c(3095)` C2275/C2146/C2065 for a distinct declaration-order family; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` worktree at commit `41388c9cb160d0886d5ca00d2e6c878260a8a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: delta_repr() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _datetimemodule.c(3095), beginning with a distinct declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `tzinfo_from_isoformat_results` C89 declaration-order slice)

Date: 2026-09-17 17:13 UTC

The recorded frontier was force-re-probed first and remained applicable: 27 sources compiled, including _blake2/blake2s_impl.c, and _datetimemodule.c was first. The first stable diagnostic was _datetimemodule.c(1435) for tzinfo_from_isoformat_results()'s post-statement PyObject *delta declaration. One focused coding-agent delegation was attempted but failed before launch because the runtime lacks the anthropic package; no child files or independent review are claimed. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted PyObject *delta into tzinfo_from_isoformat_results()'s opening declaration group and changed its initializer to an assignment at the original evaluation point. Timezone construction, reference counting, error handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostic `_datetimemodule.c(1435) C2275/C2065` for `PyObject *delta`; later cascades included distinct declaration and legacy-integer families; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `tzinfo_from_isoformat_results delta declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `tzinfo_from_isoformat_results()` compiled past this defect family. The next first stable diagnostics are `_datetimemodule.c(2663)`/`(2670)` for `sep` in a distinct declaration-order family; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression tests and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus patch check	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` worktree at commit `41388c9cb160d0886d5ca00d2e6c8782608a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: tzinfo_from_isoformat_results() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _datetimemodule.c(2663)/(2670), beginning with sep. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `parse_hh_mm_ss_ff` C89 declaration-order slice)

Date: 2026-09-17 12:59 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Before changing anything, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _datetimemodule.c frontier was force-re-probed first and remained applicable: 27 sources compiled, including _blake2/blake2s_impl.c, and parse_hh_mm_ss_ff() was first. The first stable diagnostics were C2143 declaration-order errors at _datetimemodule.c(822)–(829), with cascades from its post-statement locals, C99 loop declaration, and later declarations. One focused read-only Codex coding-agent lane inspected this exact function and recommended the minimal behavior-preserving C89 transformation; it made no file changes and ran no build. No independent review is claimed.

cpython/Modules/_datetimemodule.c — hoisted parse_hh_mm_ss_ff() locals and its static correction table, replaced the nonconstant vals initializer with assignments, changed the loop counter and character local to C89 declaration/assignment forms, and changed fractional locals to assignments. Parsing order and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the exact C89-safe parse_hh_mm_ss_ff() shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostics `_datetimemodule.c(822)`/`(823)` C2143, followed by `(824)`, `(826)`, and `(829)` declaration/loop cascades; summary `total=28 compiled=27 cached=0 skipped=0`.
focused read-only Codex delegation	exit 0; recommended hoisting `p`, `p_end`, `vals`, `has_separator`, `i`, `len_remains`, `to_parse`, and `correction`, explicit `vals` assignments, C89 loop/local forms, and fractional assignments; no files changed and no child build run.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `parse_hh_mm_ss_ff declaration missing from opening group: int *vals[3];`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `parse_hh_mm_ss_ff()` compiled past its defect family. Existing warnings remain `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)` C4761. The next first stable diagnostics are `_datetimemodule.c(914)`/`(917)` for `parse_isoformat_time()`'s post-statement `rv`; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus patch check	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` checkout at commit `41388c9cb160d0886d5ca00d2e6c8782608a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: parse_hh_mm_ss_ff() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is parse_isoformat_time() at _datetimemodule.c(914), beginning with its rv declaration after executable statements. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `parse_isoformat_date` `rv` C89 slice)

Date: 2026-09-17 10:50 UTC

The recorded frontier was force-re-probed first and remained applicable: 27 sources compiled, including _blake2/blake2s_impl.c, and _datetimemodule.c was first. The first stable diagnostics were _datetimemodule.c(793)/(794) C2143/C2065 for the distinct rv declaration in parse_isoformat_date(). One focused coding-agent delegation was attempted as required but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the rv declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted int rv into parse_isoformat_date()'s opening declaration group and changed only its original initializer to an assignment immediately before if (rv). ISO-week conversion and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe rv declaration/assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | ||---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 27 sources compiled; first stable diagnostics _datetimemodule.c(793)/(794) C2143/C2065 for rv; summary total=28 compiled=27 cached=0 skipped=0. | || focused coding-agent delegation | failed before launch: The 'anthropic' package is required for the Anthropic provider; no child files were used and no independent review is claimed. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the assertion, before source edit | exit 1 as required by TDD; parse_isoformat_date rv declaration missing from opening group. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | exit 0; ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | exit 2; _datetimemodule.c compiled past the rv family. The next first stable diagnostics are (822)/(823) C2143 for parse_hh_mm_ss_ff() declarations; summary total=28 compiled=27 cached=0 skipped=0. | || applicable regression suites and source checks | exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested git -C cpython diff --check all passed. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch plus patch check | exit 0; compatibility patch regenerated and nested source diff is clean. | || pristine detached nested cpython checkout at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549 plus git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; patch applies cleanly; temporary worktree removed. |

Current compile-frontier state: parse_isoformat_date() now compiles past its rv C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct parse_hh_mm_ss_ff() declaration-order family at _datetimemodule.c(822)/(823). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `parse_isoformat_date` ISO-week locals C89 slice)

Date: 2026-09-17 08:44 UTC

The recorded frontier was force-re-probed first and remained applicable: 27 sources compiled, including _blake2/blake2s_impl.c, and _datetimemodule.c was first. The first stable diagnostics were _datetimemodule.c(769)/(770) C2143 for iso_week/iso_day, followed by a distinct rv declaration at (791). One focused coding-agent delegation was attempted as required but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the ISO-week local declaration family.

cpython/Modules/_datetimemodule.c — hoisted int iso_week and int iso_day into parse_isoformat_date()'s opening declaration group and changed only their original initializers to assignments after the W marker. ISO-week parsing, default-day behavior, conversion, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe ISO-week declaration/assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostics `_datetimemodule.c(769)`/`(770)` C2143 for `iso_week`/`iso_day`, followed by cascades; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `parse_isoformat_date ISO-week declaration missing from opening group: int iso_week;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `parse_isoformat_date()` compiled past the ISO-week family. The next first stable diagnostics are `_datetimemodule.c(793)`/`(794)` C2143/C2065 for the distinct `rv` declaration; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus diff check	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` checkout at commit `41388c9cb160d0886d5ca00d2e6c8782608a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: parse_isoformat_date() now compiles past its iso_week/iso_day C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct rv declaration at _datetimemodule.c(791) (now observed as (793)/(794) after the hoist). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `parse_isoformat_date` C89 declaration-order slice)

Date: 2026-09-17 06:39 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _datetimemodule.c frontier was force-re-probed first and remained applicable: 27 sources compiled, and the first stable diagnostics were _datetimemodule.c(760)/(761) for parse_isoformat_date()'s post-statement uses_separator declaration. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only that declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted unsigned char uses_separator into parse_isoformat_date()'s opening declaration group and changed only its initializer to an assignment at the original evaluation point. Separator detection, pointer advancement, ISO-week handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration/assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostics `_datetimemodule.c(760)`/`(761)` C2143/C2065 for `uses_separator`; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `parse_isoformat_date separator declaration missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `parse_isoformat_date()` compiled past the `uses_separator` family. The next first stable diagnostics are `_datetimemodule.c(769)`/`(770)` for `iso_week`/`iso_day`, followed by `rv` and later distinct declaration families; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus diff check	exit 0; compatibility patch regenerated and nested source diff is clean.

Current compile-frontier state: parse_isoformat_date() now compiles past its uses_separator C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct iso_week/iso_day declaration family at _datetimemodule.c(769)/(770). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `parse_digits` C89 loop-declaration slice)

Date: 2026-09-17 04:31 UTC

The recorded _datetimemodule.c frontier was force-re-probed first and remained applicable: 27 sources compiled, and the first stable diagnostics were _datetimemodule.c(727) C2143/C2065/C2059 errors from for (size_t i = ...), with declaration-order cascades later in the same source. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only parse_digits()'s loop-counter declaration family.

cpython/Modules/_datetimemodule.c — hoisted size_t i into parse_digits()'s opening declaration group and changed only the for initializer to assignment. Digit parsing, pointer advancement, bounds check, and accumulation order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe loop-counter declaration and assignment.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable blocker `_datetimemodule.c(727)` C2143/C2065/C2059 from the C99 loop declaration; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `parse_digits loop counter declaration missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `parse_digits()` compiled past the line-727 loop family. The next first stable diagnostics are `_datetimemodule.c(760)`/`(761)` for `parse_isoformat_date()`'s post-statement `uses_separator` declaration, followed by later distinct declaration families; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus `git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached nested `cpython` worktree at commit `41388c9cb160d0886d5ca00d2e6c8782608a4549` plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: parse_digits() now compiles past its C89 loop-declaration family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is parse_isoformat_date() at _datetimemodule.c(760), beginning with the uses_separator declaration after executable statements. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_datetimemodule.c` `iso_to_ymd` C89 declaration-order slice)

Date: 2026-09-17 02:25 UTC

The recorded cmathmodule.c frontier was force-re-probed first and remained applicable: 27 sources compiled, and _datetimemodule.c was first. The first stable diagnostics were _datetimemodule.c(422) and (424) C2143 declaration-order errors for day_1 and day_offset. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the iso_to_ymd() C89 declaration-order family.

cpython/Modules/_datetimemodule.c — hoisted day_1 and day_offset into the opening declaration group and changed only their later initializers to assignments. ISO-week validation, conversion order, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration/assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 27 sources compiled; first stable diagnostics were `_datetimemodule.c(422)` and `(424)` C2143 declaration-order errors; summary `total=28 compiled=27 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `iso_to_ymd declaration missing from opening group: int day_1;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `iso_to_ymd()` compiled past the `day_1`/`day_offset` family. The next first stable diagnostics are `_datetimemodule.c(727)` C89 `for (size_t i = ...)`, followed by declaration-order errors at `(758)` and later; summary `total=28 compiled=27 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and nested `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus `git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: _datetimemodule.c now compiles past iso_to_ymd()'s C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is parse_digits() at line 727, beginning with its C99 loop declaration. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`pymath.h` VC6 `Py_NAN` fallback slice)

Date: 2026-09-17 00:17 UTC

The recorded cmathmodule.c frontier was re-probed first and remained applicable: 26 sources compiled and cmathmodule.c(380) was the first stable diagnostic, error C2065: 'NAN' : undeclared identifier, caused by Py_NAN's C99 NAN fallback in Include/pymath.h. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the VC6 Py_NAN defect family.

cpython/Include/pymath.h — added an _MSC_VER < 1300 branch defining Py_NAN as (Py_HUGE_VAL * 0.0), retaining the existing builtin and C99 branches for other compilers. No cmath behavior or non-VC6 branch was changed.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused TDD assertion requiring the VC6 fallback and retaining the C99 fallback.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 26 sources compiled; first stable diagnostic `cmathmodule.c(380) C2065: 'NAN' undeclared`; summary `total=27 compiled=26 cached=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; the new `pymath.h` fallback assertion reported `not ok`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `cmathmodule.c` compiled past the `NAN` blocker; existing warnings remain at `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)` C4761. The next first stable diagnostics are `_datetimemodule.c(422)`/`(424)` C2143 declaration-order errors; summary `total=28 compiled=27 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus `git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: cmathmodule.c now compiles past the VC6 Py_NAN/C99 NAN family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _datetimemodule.c at line 422, beginning with C89 declaration-order errors. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`cmathmodule.c` positional PyModuleDef initializer slice)

Date: 2026-09-16 22:10 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was re-probed first and remained applicable through binascii.c. The actual first stable blocker was cmathmodule.c(380) : error C2065: 'NAN' : undeclared identifier, with a separate later designated-initializer diagnostic at line 1417. One focused Codex read-only coding-agent delegation inspected this exact source and recommended addressing the narrower PyModuleDef designated-initializer family first; it made no changes and no independent review is claimed. This run addressed only that initializer family; the NAN blocker remains untouched.

cpython/Modules/cmathmodule.c — replaced only cmathmodule's designated PyModuleDef fields with declared-order positional fields: name, doc, size, methods, and slots. Values and module behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer and rejecting the designated form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 26 sources compiled; first stable diagnostics were `cmathmodule.c(380) C2065: 'NAN' undeclared` and `(1417) C2059: syntax error : '.'`; summary `total=27 compiled=26 cached=0 skipped=0`.
focused Codex read-only delegation in `/tmp/python-win9x-codex-cmath`	exit 0; recommended the minimal positional `cmathmodule` initializer; no files changed and no tests run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `cmathmodule positional initializer mismatch`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `cmathmodule.c` compiled past the designated-initializer blocker. The next first stable diagnostic is `cmathmodule.c(380) C2065: 'NAN' undeclared`; existing warnings remain `arraymodule.c(2247)` and `audioop.c(1536)`, `(1609)` C4761; summary `total=27 compiled=26 cached=0 skipped=0`.
applicable regression suites and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: cmathmodule.c now compiles past its C99 designated PyModuleDef initializer under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct NAN/Py_NAN compatibility blocker at line 380; it was not changed speculatively. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`binascii.c` `a2b_base64` C89 declaration-order slice)

Date: 2026-09-16 20:02 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was re-probed first and remained applicable through binascii.c. The prior zlib.h blocker was bypassed narrowly by suppressing USE_ZLIB_CRC32 for binascii.c; its in-tree CRC32 fallback is already present. The new first stable blocker was binascii_a2b_base64_impl() C89 declaration ordering at lines 393–418. One focused coding-agent delegation was attempted with Codex but failed before launch because the runtime requires the unavailable anthropic package; no child changes or independent review are claimed. This run addressed only the a2b_base64 declaration family.

scripts/vc6-probe-pythoncore-frontier.sh — suppresses only USE_ZLIB_CRC32 for cpython/Modules/binascii.c, keeping the external zlib dependency out of this minimal frontier while selecting binascii's existing fallback.
cpython/Modules/binascii.c — hoisted the a2b_base64 locals into the opening declaration group and changed only their initializers to assignments; decoding, error handling, allocation, and loop order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused TDD assertions for the binascii define suppression and C89-safe local/assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 25 sources compiled; first stable diagnostic was `binascii.c(66) : fatal error C1083: Cannot open include file: 'zlib.h'`; summary `total=26 compiled=25 cached=0 skipped=0`.
focused Codex delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the define-suppression assertion, before build-script edit	exit 1 as required by TDD; `frontier disables unavailable zlib CRC32 path for binascii.c`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after build-script edit	exit 2; binascii compiled past the zlib-header blocker; first stable diagnostics were `binascii.c(393)`–`(418)` C89 declaration errors; summary `total=27 compiled=26 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the source assertion, before source edit	exit 1 as required by TDD; `a2b_base64 declaration missing from opening group: const unsigned char *ascii_data;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `a2b_base64` compiled past its C89 declaration family. Existing warnings remain `arraymodule.c(2247)`, `audioop.c(1536)`, and `(1609)` C4761. The next first stable diagnostics are `cmathmodule.c(380) : error C2065: 'NAN' : undeclared identifier` and `(1417) : error C2059: syntax error : '.'`; summary `total=27 compiled=26 cached=0 skipped=0`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings.

Current compile-frontier state: binascii.c now compiles past both the unavailable external zlib-header path and a2b_base64's C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct cmathmodule.c NAN/designated-initializer family at lines 380 and 1417. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`audioop.c` `audioop_ratecv_impl` unavailable `SIZE_MAX` slice)

Date: 2026-09-16 17:50 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was re-probed first and remained applicable: _blake2/blake2s_impl.c, atexitmodule.c, and all preceding sources compiled. The actual first stable blocker was audioop.c(1375) : error C2065: 'SIZE_MAX' : undeclared identifier. One focused external Codex read-only lane (codex-cli 0.153.4) inspected this exact defect and recommended the existing VC6-compatible (size_t)-1 idiom; it made no changes. This run addressed only that SIZE_MAX defect family under the strict TDD cycle.

cpython/Modules/audioop.c — replaced only the audioop_ratecv_impl() allocation-overflow guard's SIZE_MAX operand with ((size_t)-1). The strict comparison, MemoryError path, and allocation order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused source-shape regression requiring the replacement guard, rejecting SIZE_MAX within audioop_ratecv_impl(), and preserving the error/allocation sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` and preceding sources compiled, 24 sources compiled, and first stable diagnostic was `cpython\\Modules\\audioop.c(1375) : error C2065: 'SIZE_MAX' : undeclared identifier`; summary `total=25 compiled=24 cached=0 skipped=0`.
`codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended replacing the guard operand with `((size_t)-1)` based on the existing `_pickle.c` precedent; no files changed and no tests were run by the child.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `audioop ratecv SIZE_MAX guard replacement missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `audioop.c` compiled past the `SIZE_MAX` blocker, with existing warnings `audioop.c(1536)` and `(1609)` C4761. The next first stable diagnostic is `cpython\\Modules\\binascii.c(66) : fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory`; summary `total=26 compiled=25 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: audioop_ratecv_impl() now compiles past its unavailable SIZE_MAX family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct external zlib dependency at binascii.c(66) (zlib.h unavailable). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`atexitmodule.c` `atexitmodule` positional PyModuleDef initializer slice)

Date: 2026-09-16 15:44 UTC

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c and all preceding sources compiled, 23 sources compiled total, and atexitmodule.c first failed at line 293 with C2059 on C99 designated fields. This run addressed only that initializer family. One focused external coding-agent lane was attempted in an isolated temporary snapshot; it failed before launch with Error: No such file or directory (os error 2) after the initial snapshot setup attempt also used an incorrect relative source path. No child changes or independent review are claimed. The source edit was therefore performed directly under the required TDD cycle.

cpython/Modules/atexitmodule.c — replaced only atexitmodule's designated PyModuleDef fields with declared-order positional fields: head, name, doc, size, and methods. Values and module behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer and rejecting designated fields.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` and preceding sources compiled, 23 sources compiled, and first stable diagnostic was `cpython\\Modules\\atexitmodule.c(293) : error C2059: syntax error : '.'`; summary `total=24 compiled=23 cached=0 skipped=0`.
focused coding-agent delegation in isolated `/tmp/python-win9x-codex-atexit` snapshot	failed before launch with `Error: No such file or directory (os error 2)`; no child files were used and no independent review is claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `atexitmodule positional initializer mismatch`, followed by `FAILED`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `atexitmodule.c` compiled past the designated-initializer family. The next first stable diagnostic is `cpython\\Modules\\audioop.c(1375) : error C2065: 'SIZE_MAX' : undeclared identifier`; summary `total=25 compiled=24 cached=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and focused frontier assertions reported `ALL TESTS PASSED`.
`git -C cpython diff --check`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: atexitmodule.c now compiles past its C99 designated PyModuleDef initializer under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct SIZE_MAX blocker in audioop.c at line 1375. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`atexitmodule.c` `atexit_unregister` C89 declaration-order slice)

Date: 2026-09-16 13:37 UTC

The recorded frontier was re-probed first, but its state had advanced beyond the recorded atexit_register() blocker: 23 sources compiled through atexitmodule.c, and the actual first stable diagnostics were in atexit_unregister() at line 243. This run addressed only that C89 declaration-order family: the loop counter i, callback pointer cb, and comparison result eq.

cpython/Modules/atexitmodule.c — hoisted int i, atexit_callback *cb, and int eq before executable statements; changed the loop, callback lookup, and rich-comparison declarations to assignments at their original evaluation points. Unregister traversal, error handling, callback deletion, and ordering are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the three opening declarations, rejecting mixed declarations, and preserving loop/lookup/comparison assignments.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 23 sources compiled through `atexitmodule.c`; first stable diagnostics were `atexitmodule.c(243)` C2143/C2065/C2059/C2044 errors from `for (int i = ...)` and later `cb`/`eq` declarations; summary `total=24 compiled=23 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `atexit_unregister declaration missing from opening group: int i;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `atexit_unregister()` compiled past its declaration-order family. The next first stable diagnostic is `atexitmodule.c(293) C2059` for the remaining designated module initializer; summary `total=24 compiled=23 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: atexit_unregister() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate designated initializer in atexitmodule.c at line 293. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`atexitmodule.c` `atexit_register` C89 declaration-order slice)

Date: 2026-09-16 11:29 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The required focused coding-agent delegation was attempted but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed.

The recorded atexitmodule.c frontier was re-probed first and remained applicable: 23 sources compiled through _blake2/blake2s_impl.c, and atexitmodule.c was first. This run addressed only atexit_register()'s C89 declaration-order family. The later atexit_clear() loop/declaration blockers remain untouched.

cpython/Modules/atexitmodule.c — hoisted func, state, r, size, and callback into the function's opening declaration group; changed only declaration initializers to assignments at their original evaluation points. Registration, allocation, reference-counting, error handling, and callback ordering are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the five opening declarations, rejecting mixed declarations, and preserving assignment/reallocation order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 23 sources compiled; first stable diagnostics were `atexitmodule.c(150)` for `PyObject *func`, followed by `atexitmodule.c(157)`, `(161)`, and `(169)` declaration-order/cascade diagnostics; summary `total=24 compiled=23 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes or independent review are claimed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `atexit_register declaration missing from opening group: PyObject *func;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `atexit_register()` compiled past its declaration family. The next first stable diagnostics are `atexitmodule.c(243)` C2143/C2065/C2059 errors for the later `atexit_clear()` loop/declarations; summary `total=24 compiled=23 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: atexit_register() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct atexit_clear() blocker at atexitmodule.c(243). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`atexitmodule.c` `atexit_callfuncs` mixed-declaration slice)

Date: 2026-09-16 09:23 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. One focused coding-agent delegation was attempted, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained applicable: cpython/Modules/_blake2/blake2s_impl.c and all preceding sources compiled, 23 sources compiled total, and atexitmodule.c was first. This run addressed only atexit_callfuncs()'s post-statement the_func/res declaration family. The later atexitmodule.c declaration families remain untouched.

cpython/Modules/atexitmodule.c — hoisted PyObject *the_func and PyObject *res into the opening declaration group and changed only their declaration initializers to assignments at the existing callback-call point. Callback order, reference-counting, error handling, and cleanup behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the two opening-group declarations, rejecting the mixed declarations, and preserving both assignment statements.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 23 sources compiled through `_blake2/blake2s_impl.c` and `arraymodule.c`; first stable diagnostics were `atexitmodule.c(99)` C2143 and `(100)` C2275/C2065 for `the_func`/`res`; summary `total=24 compiled=23 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`; Wine emitted expected headless-display warnings.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `atexit_callfuncs: the_func declaration missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `atexit_callfuncs()` compiled past the `the_func`/`res` family. The next first stable diagnostics are `atexitmodule.c(150)` for `atexit_register()`'s mixed declaration, followed by `atexitmodule.c(157)` and later blockers; summary `total=24 compiled=23 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: atexit_callfuncs() now compiles past its mixed-declaration family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is atexit_register() at atexitmodule.c(150). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`atexitmodule.c` C89 loop-declaration slice)

Date: 2026-09-16 07:16 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was re-probed first and remained passed: 23 sources compiled through arraymodule.c, and atexitmodule.c was first. This run addressed only the C89 loop-declaration family at atexit_cleanup() and atexit_callfuncs(). One focused Codex implementation lane (codex-cli 0.153.4) ran in an isolated temporary snapshot; its exact two-function candidate was inspected and applied manually. No independent review is claimed.

cpython/Modules/atexitmodule.c — added opening-group int i declarations in atexit_cleanup() and atexit_callfuncs(), changing only the two for initializers to assignments. Callback cleanup/call order and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused TDD assertions for both C89-safe loop forms and preserved loop sequences.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; _blake2/blake2s_impl.c and preceding sources compiled, 23 sources compiled total, and first stable diagnostics were atexitmodule.c(43) and (90) C2143/C2065/C2059/C2044 errors from C99 for (int i = ...) declarations; summary total=24 compiled=23 cached=0 skipped=0. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the assertion, before source edit | exit 1 as required by TDD; cleanup: loop counter declaration missing. | || isolated codex exec -s workspace-write --skip-git-repo-check ... | exit 0; candidate changed only the two requested loops in atexitmodule.c; exact-content and whitespace checks passed; no build/runtime tests were run by the candidate. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | exit 0; ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | exit 2; both loop-declaration blockers cleared. The next first stable diagnostics are atexitmodule.c(99)/(100) for post-statement the_func/res declarations, followed by later mixed declarations; summary total=24 compiled=23 cached=0 skipped=0. | || bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check | exit 0; all applicable regression suites and source checks passed. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check | exit 0; compatibility patch regenerated and nested source diff is clean. | || pristine detached v3.11.16 temporary worktree plus git apply --check | exit 0; patch applies cleanly; temporary verification worktree removed. |

Current compile-frontier state: atexitmodule.c now compiles past its two C89 loop-declaration blockers under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate atexit_callfuncs() mixed-declaration family at lines 99–100. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `arraymodule` PyModuleDef positional-initializer slice)

Date: 2026-09-16 05:09 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded _blake2/blake2s_impl.c sequence was re-probed first and remained passed: _blake2/blake2s_impl.c and the preceding sources compiled, 22 sources compiled in total, and arraymodule.c was first. The first stable diagnostics were the separate C99 designated initializer at arraymodule.c(3161); the earlier array_modexec() declaration-order family was clear. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed. This run addressed only the arraymodule PyModuleDef initializer family.

cpython/Modules/arraymodule.c — converted arraymodule to declared-order positional PyModuleDef initialization: base, name, doc, size, methods, slots, traverse, clear, and free. Values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer and rejecting designated fields.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` and preceding sources compiled; 22 sources compiled; first stable diagnostics were `arraymodule.c(3161) C2059` for `.` and `,`; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `arraymodule positional initializer mismatch`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `arraymodule.c` compiled successfully, with existing warning `arraymodule.c(2247) C4761`; next first stable blocker is `atexitmodule.c(43)` C89 loop declarations and related mixed declarations; summary `total=24 compiled=23 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: arraymodule.c now compiles past its PyModuleDef designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is atexitmodule.c(43), beginning with C89 loop-declaration errors. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_modexec` C89 declaration-order slice)

Date: 2026-09-16 03:01 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c and the preceding sources compiled, 22 sources compiled in total, and arraymodule.c first failed on array_modexec() declarations at lines 3114, 3119, and 3125. This run addressed only that C89 declaration-order family. One focused Codex implementation lane (codex-cli 0.153.4) ran in an isolated copy with the existing edits; its candidate was inspected and applied manually. No independent review is claimed.

cpython/Modules/arraymodule.c — hoisted abc_mod, mutablesequence, and res into array_modexec()'s opening declaration group and changed only their declaration initializers to assignments at the original evaluation points. Import, attribute lookup, registration, cleanup, and error behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the three C89-safe declarations and preserved assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(3114)`, `(3119)`, and `(3125)` C2275/C2065 declaration errors for `abc_mod`, `mutablesequence`, and `res`; the later designated initializer was at `(3158)`; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `array_modexec local missing from opening declaration group: PyObject *abc_mod;`.
isolated `codex exec -s workspace-write --skip-git-repo-check ...`	exit 0; candidate changed only the requested `array_modexec()` source block; its scope assertion passed and `git diff --check` produced no output. No candidate build or runtime tests were run.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the three `array_modexec()` declaration blockers cleared. The next first stable diagnostics are the separate designated `arraymodule` initializer at `arraymodule.c(3161)` C2059; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: array_modexec() now compiles past its three C89 declaration-order blockers under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate designated initializer in arraymodule at line 3161. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `arrayiter_spec` positional-initializer slice)

Date: 2026-09-16 00:54 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before this run, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: 22 sources compiled, including _blake2/blake2s_impl.c, and arraymodule.c first failed at the C99 designated initializer for arrayiter_spec at line 3026. This run addressed only that initializer family. The focused coding-agent delegation was attempted and failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed.

cpython/Modules/arraymodule.c — converted arrayiter_spec to declared-order positional PyType_Spec initialization: name, basicsize, itemsize (0), flags, and slots. Values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion rejecting designated fields and requiring the positional field order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostic was `arraymodule.c(3026) C2059 syntax error : '.'`; later blockers were `(3113)`, `(3118)`, `(3124)`, and `(3157)`; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `arrayiter_spec retains designated fields`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the `arrayiter_spec` C2059 blocker cleared. The next first stable diagnostics are `arraymodule.c(3114)`, `(3119)`, and `(3125)` for post-statement locals in `array_modexec()`, followed by the designated `arraymodule` initializer at `(3158)`; summary `total=23 compiled=22 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: arraymodule.c now compiles past arrayiter_spec's C99 designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is array_modexec()'s post-statement abc_mod, mutablesequence, and res declarations at lines 3114, 3119, and 3125. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_arrayiterator_reduce_impl` C89 declaration-order slice)

Date: 2026-09-15 22:45 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. Before changes, PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. One focused coding-agent delegation was attempted as required, but failed before launch because the runtime lacks the anthropic package; no child changes or independent review are claimed.

The current frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c and the preceding sources compiled, 22 sources compiled in total, and arraymodule.c remained first. The first stable diagnostics were arraymodule.c(2976)/(2978) from array_arrayiterator___reduce___impl() declarations after executable statements. This run addressed only that C89 declaration-order family. The later arrayiter_spec designated initializer at line 3026 and module-setup blockers remain untouched.

cpython/Modules/arraymodule.c — hoisted array_state *state and PyObject *func into the opening declaration group and changed only their later declaration initializers to assignments. Lookup, assertion, iterator handling, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the declaration group and preserved state lookup/func assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(2976)` C2143 and `(2978)` undeclared/cascade errors for `func`; later diagnostics included lines 2992, 3004, 3024, 3111, 3116, 3122, and 3155; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the corrected assertion, with source unchanged	exit 1 as required by TDD; `array iterator reduce state declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the `array_arrayiterator___reduce___impl()` C2143/undeclared-local blockers cleared. The next first stable diagnostic is `arraymodule.c(3026)` C2059 for the separate `arrayiter_spec` designated initializer; later blockers remain at 3113, 3118, 3124, and 3157; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.
`git diff --check` at the workspace root	exit 2 only on the generated compatibility patch's pre-existing patch-payload trailing-whitespace lines; nested `git -C cpython diff --check` remains exit 0.

Current compile-frontier state: array_arrayiterator___reduce___impl() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate arrayiter_spec C99 designated initializer at arraymodule.c(3026). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `arrayiter_next` C89 declaration-order slice)

Date: 2026-09-15 20:27 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. The nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. README.md and the legacy-toolchain reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md were read before changes. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. One focused coding-agent delegation was attempted as required, but could not launch because the runtime lacks the anthropic package; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c and the preceding sources compiled, 22 sources compiled in total, and arraymodule.c remained first. The first stable diagnostics were arraymodule.c(2922)/(2923) from arrayiter_next()'s debug-only array_state declaration after executable statements. This run addressed only that C89 declaration-order family. The later array_arrayiterator___reduce___impl() declaration at line 2976, arrayiter_spec designated initializer, and module-setup blockers remain untouched.

cpython/Modules/arraymodule.c — added a bare array_state *state to arrayiter_next()'s opening declaration group and changed the debug-only lookup to an assignment. The #ifndef NDEBUG guard, type assertion, lookup point, and iterator behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and preserved debug lookup/assertion sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(2922)` C2143 and `(2923)` undeclared/cascade errors for `state`; later diagnostics included lines 2975, 2991, 3023, 3110, 3115, 3121, and 3154; summary `total=23 compiled=22 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; after correcting the assertion matcher, it failed with `arrayiter_next state declaration missing from opening group`. No production source was changed before the expected red result.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the `arrayiter_next()` C2143/state blockers cleared. The next first stable diagnostics are `arraymodule.c(2976)`/`(2978)` for `array_arrayiterator___reduce___impl()`'s post-statement `array_state`/`func` declarations, followed by lines 2992, 3024, 3111, 3116, 3122, and 3155; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: arrayiter_next() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is array_arrayiterator___reduce___impl() at arraymodule.c(2976). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_spec` positional-initializer slice)

Date: 2026-09-15 18:24 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The relevant reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c compiled cleanly, 22 sources compiled, and arraymodule.c first failed at the C99 designated initializer for array_spec at line 2876. This run addressed only that initializer family. One focused Codex implementation lane (codex-cli 0.153.4) ran in an isolated minimal copy after an initial oversized-copy attempt hit /tmp disk-quota exhaustion; the candidate diff was inspected and applied manually. No independent review is claimed.

cpython/Modules/arraymodule.c — converted array_spec to declared-order positional PyType_Spec initialization: name, basicsize, itemsize (0), flags, and slots. Values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion rejecting designated fields and requiring the positional field order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled cleanly, 22 sources compiled, and first stable diagnostics were `arraymodule.c(2876) C2059 syntax error : '.'`; later diagnostics included iterator declaration-order, additional designated initializers, and module-setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
focused assertion after adding it, before source edit	exit 1 as required by TDD; `array_spec retains designated fields`.
focused Codex implementation lane in `/tmp/python-win9x-codex-array-spec`	exit 0; candidate changed only the requested `array_spec` source block, with positional fields in declared order; candidate diff was inspected before manual application.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the `array_spec` C2059 blocker cleared. The next first stable diagnostics are `arraymodule.c(2922)`/`(2923)` for `arrayiter_next()`'s debug-only `array_state` declaration after executable statements, followed by distinct declaration, initializer, and module-setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: arraymodule.c now compiles past array_spec's C99 designated-initializer family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate arrayiter_next() debug-block declaration-order family at arraymodule.c(2922). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `arraytype_doc` VC6 string-size slice)

Date: 2026-09-15 16:14 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c compiled cleanly, 22 sources compiled, and arraymodule.c remained first. The first stable diagnostic was arraymodule.c(2830) : error C2026: string too big, trailing characters truncated in arraytype_doc. This run addressed only that VC6 string-literal-size family. One focused Codex implementation lane (codex-cli 0.153.4) ran in an isolated /tmp/python-win9x-codex-array-doc copy, preserved the existing local edits, and supplied the candidate shape. The candidate was inspected and applied manually; no independent review is claimed.

cpython/Modules/arraymodule.c — split arraytype_doc at the existing documentation-section boundary into adjacent string literals, keeping the complete 2,340-byte documentation text and the existing PyDoc_STRVAR/Py_tp_doc behavior unchanged. The resulting literal chunks are 1,346 and 994 bytes.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused TDD assertion that all literals are at most 2,048 bytes, the concatenated documentation SHA-256 remains 36d98a6261ec374e1e5ed2da654bb1c47286a2658b86c28800af1543c40f6822, and the type documentation slot is retained.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled cleanly, 22 sources compiled, and first stable diagnostics were `arraymodule.c(2830) C2026 string too big`, followed by designated-initializer, declaration-order, and module-setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`codex exec -s workspace-write --skip-git-repo-check ...` in isolated `/tmp/python-win9x-codex-array-doc`	exit 0; candidate changed only `arraymodule.c` and the focused test, reported RED exit 1 before the source split and GREEN exit 0 after it, and passed shell syntax checking. No candidate files were copied automatically.
focused TDD assertion in the delegated copy before source edit	exit 1 as required by TDD; `arraytype_doc exceeds VC6's 2048-byte individual string literal limit`.
focused TDD assertion in the delegated copy after source edit	exit 0; `ok - arraymodule arraytype_doc uses VC6-sized literals with unchanged text`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after applying the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the C2026 blocker cleared. The next first stable diagnostic is `arraymodule.c(2876) : error C2059: syntax error : '.'` for `array_spec`, followed by declaration-order and module-setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; every applicable regression suite and source check reported `ALL TESTS PASSED`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff is clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: arraymodule.c now compiles past arraytype_doc's VC6 string-size family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C99 designated initializer in array_spec at line 2876. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `typecode_to_mformat_code` 64-bit width spelling slice)

Date: 2026-09-15 14:07 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c compiled cleanly, 22 sources compiled, and arraymodule.c remained first with sizeof(long long) diagnostics at arraymodule.c(1911) and (1915). One focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed. This run addressed only that sizeof(long long) defect family.

cpython/Modules/arraymodule.c — changed only the q/QQ cases in typecode_to_mformat_code() from sizeof(long long) to sizeof(PY_LONG_LONG). Signedness, typecode dispatch, width calculation, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring exactly two sizeof(PY_LONG_LONG) assignments in typecode_to_mformat_code() and rejecting the old spelling.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(1911)` and `(1915)`, `error C2632: 'long' followed by 'long' is illegal`; later diagnostics included string-size, initializer, declaration-order, and API blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `get_native_typecode q/QQ width is not VC6-compatible`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the `(1911)`/`(1915)` diagnostics cleared. The next first stable diagnostics are `arraymodule.c(2830)` string-size, `(2876)` initializer, `(2921)` declaration-order, and later API/setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks reported `ALL TESTS PASSED`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: typecode_to_mformat_code() now compiles past its q/QQ sizeof(long long) keyword family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is arraymodule.c(2830), the separate string-size family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_array_fromunicode` C89 declaration-order slice)

Date: 2026-09-15 11:59 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c compiled cleanly, 22 sources compiled, and arraymodule.c remained first with C89 declaration diagnostics at arraymodule.c(1746) and (1750). This run addressed only array_array_fromunicode_impl()'s ustr_length/old_size declaration-order family. One focused Codex read-only delegation (codex-cli 0.153.4) inspected the exact function and recommended the minimal hoist; it made no changes. No independent review is claimed.

cpython/Modules/arraymodule.c — hoisted ustr_length into the function declaration group and old_size before the decrement in the guarded block; changed only the declaration initializers to assignments, preserving conversion/guard/decrement/resize evaluation points and behavior.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused TDD assertions for the declaration groups, assignment sequence, and preserved guard/decrement behavior.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(1746)`/`(1750)` for C89 `ustr_length`/`old_size`; later diagnostics included 64-bit, string-size, initializer, and API blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended hoisting exactly `ustr_length` and `old_size`, retaining their original evaluation points; no files changed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `fromunicode: ustr_length declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; both `ustr_length`/`old_size` diagnostics cleared. The next first stable diagnostics are `arraymodule.c(1911)`/`(1915)` for the separate `long long` family, followed by string-size, initializer, declaration-order, and API blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
full applicable regression suite and source checks	exit 0; shell syntax, public/core/PathCch/getpath/stdint/frontier suites and `git -C cpython diff --check` all passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` plus diff check	exit 0; compatibility patch regenerated and source diff clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: array_array_fromunicode_impl() now compiles past its ustr_length/old_size C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate long long family at arraymodule.c(1911) and (1915). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_state` declaration-order slice)

Date: 2026-09-15 09:53 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The relevant reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: 22 sources compiled, including _blake2/blake2s_impl.c, then arraymodule.c was first. This run addressed only the two C89 declaration-order diagnostics for array_state in array_array_fromfile_impl() and array_array_tofile_impl(). One focused Codex read-only delegation inspected the exact functions and recommended the minimal hoist; it made no changes. No independent review is claimed.

cpython/Modules/arraymodule.c — added one bare array_state *state declaration to each function's opening declaration group and changed only the two later declaration initializers to assignments. Lookup timing, early exits, assertions, and write/read sequences are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused TDD assertions for both functions.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.

Exact command results: prior slice recorded in the following historical entry; all applicable regression suites, patch regeneration, and pristine patch application passed.

Current compile-frontier state: array_array_fromfile_impl() and array_array_tofile_impl() now compile past their array_state declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier was arraymodule.c(1746)/(1750), addressed in the entry above. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_repeat` C89 declaration-order slice)

Date: 2026-09-15 03:34 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded arraymodule.c(920) frontier was re-probed first and remained true: 22 sources compiled, including _blake2/blake2s_impl.c, then array_repeat() was the first failing source. This run addressed only its C89 declaration-order family. One focused Codex read-only implementation-guidance lane (codex-cli 0.153.4) inspected the exact function and recommended the same five-local hoist; it made no changes. No independent review is claimed.

cpython/Modules/arraymodule.c — hoisted array_length, size, np, oldbytes, and newbytes before executable statements; changed only their later declaration initializers to assignments, preserving normalization, overflow checks, allocation, early returns, and byte repetition order.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration group and preserved assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(920)`, `(924)`, `(925)`, `(931)`, and `(932)` for mixed C99 declarations in `array_repeat()`; later blockers included lines 1086, 1171, 1494, 1552, 1741, 1745, 1902, 1906, 2821, 2867, 2912, 2965, 2981, 3013, and 3100; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `array_repeat declaration missing: Py_ssize_t array_length`.
`codex exec -s read-only --skip-git-repo-check ...` focused implementation guidance	exit 0; recommended hoisting the five locals and preserving assignments at the original evaluation points; no files changed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `array_repeat()` compiled past the five declaration diagnostics. The next first stable diagnostics are `arraymodule.c(1086)` for `array_inplace_repeat()`'s post-statement `size` declaration, followed by distinct loop/declaration, API, 64-bit, string-size, initializer, and module-setup blockers; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks reported `ALL TESTS PASSED`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff clean.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: array_repeat() now compiles past its C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is array_inplace_repeat() at arraymodule.c(1086). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_richcompare` duplicate `cmp` declaration slice)

Date: 2026-09-15 01:27 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The relevant reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the previously verified banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: 22 sources compiled, then arraymodule.c failed first at the distinct duplicate int cmp; declaration after compare_sizes:. This run addressed only that C89 declaration-order family. One focused coding-agent implementation delegation was attempted and failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

cpython/Modules/arraymodule.c — removed only the duplicate int cmp; declaration after compare_sizes:; the opening declaration remains the sole local and the size-comparison switch is unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused assertion rejecting the duplicate post-label declaration and preserving the compare-size assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 22 sources compiled; first stable diagnostic was arraymodule.c(768) : error C2143: syntax error : missing ';' before 'type' for the duplicate int cmp;; later independent blockers began at lines 920, 924, 1166, 1489, 1547, 1736, 1897, 2816, 2862, 2907, 2960, 3008, and 3095; summary total=23 compiled=22 cached=0 skipped=0. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the assertion, before source edit | exit 1 as required by TDD; array_richcompare compare_sizes retains duplicate cmp declaration. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after source edit | exit 0; ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after source edit | exit 2; the line-768 duplicate declaration blocker cleared. The next first stable diagnostics are the separate arraymodule.c(920) C89 declaration-order family (const after executable statements), followed by later declaration, initializer, string-size, and API-call blockers; summary total=23 compiled=22 cached=0 skipped=0. | || full applicable regression suite and source checks: bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check | exit 0; all suites reported ALL TESTS PASSED. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check | exit 0; patch regenerated and nested source diff clean. | || pristine detached v3.11.16 temporary worktree plus git apply --check | exit 0; compatibility patch applies cleanly; temporary worktree removed. |

Current compile-frontier state: array_richcompare() now compiles past the duplicate cmp declaration under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate arraymodule.c(920) declaration-order family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_richcompare` compare-size locals slice)

Date: 2026-09-14 23:19 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c compiled cleanly, 22 sources compiled, and arraymodule.c remained the first failing source. This run addressed only the C89 declaration-order family for vs and ws in array_richcompare(); the separate duplicate int cmp declaration after compare_sizes: and all later blockers remain untouched. One focused Codex implementation lane (codex-cli 0.153.4) worked in an isolated temporary snapshot; its candidate was inspected and only the requested source shape was applied manually. No independent review is claimed.

cpython/Modules/arraymodule.c — added vs and ws to the opening declaration group and changed their post-label declaration-with-initializer statements to assignments. Evaluation point, size comparisons, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring both locals before executable statements and preserving their assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(766)`/`(767)` C89 `Py_ssize_t vs/ws` declarations, followed by the separate `int cmp` declaration at line 768 and later declaration, `long long`, string-size, and initializer families; summary `total=23 compiled=22 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `array_richcompare size locals missing from opening group`.
isolated Codex implementation lane in `/tmp/python-win9x-codex-array`	exit 0; changed only the copied `arraymodule.c`; focused source-shape assertion reported `Source shape assertions passed`. No prohibited Git operations.
`diff -u cpython/Modules/arraymodule.c /tmp/python-win9x-codex-array/cpython/Modules/arraymodule.c`	exit 1 because the candidate differed only in the requested `vs/ws` declaration and assignment lines; candidate inspected before manual application.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after applying the source edit and correcting the declaration-group matcher	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `vs/ws` diagnostics cleared. The next first stable diagnostic is the separate post-label `int cmp` declaration at `arraymodule.c(768)`; summary `total=23 compiled=22 cached=0`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython diff --check`	exit 0; compatibility patch regenerated and nested source diff clean.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites and focused frontier assertions reported `ALL TESTS PASSED`.
pristine detached `v3.11.16` temporary worktree plus `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: array_richcompare() now compiles past the vs/ws C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct post-label int cmp declaration at line 768. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_richcompare` fast-path `res` declaration slice)

Date: 2026-09-14 21:12 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86.

The recorded arraymodule.c frontier was re-probed first and remained applicable: _blake2/blake2s_impl.c and the preceding 21 sources compiled, then the first stable diagnostic was arraymodule.c(736) : error C2275: 'PyObject' : illegal use of this type as an expression for the fast-path PyObject *res declaration after executable statements. This run addressed only that C89 declaration-order family. A single focused Codex read-only delegation (codex-cli 0.153.4) inspected the exact source and recommended reusing the existing opening res local; it made no changes. No independent review is claimed.

cpython/Modules/arraymodule.c — changed only PyObject *res = cmp ? Py_True : Py_False; to res = cmp ? Py_True : Py_False;, reusing the existing declaration at the function opening. Boolean selection, reference counting, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring one opening res declaration, no fast-path declaration, and the preserved assignment/incref/return sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled, then `arraymodule.c(736)` first reported `error C2275: 'PyObject' : illegal use of this type as an expression`; later independent blockers began at lines 766, 921, 925, 1082, 1167, 1490, 1548, 1737, 1898, 2817, 2863, 2908, 2961, 3009, and 3096. Summary `total=23 compiled=22 cached=0 skipped=0`.
focused Codex delegation: `codex exec -s read-only --skip-git-repo-check ...`	exit 0; recommended the one-line reuse of the existing `res` declaration and supplied the focused assertion shape. No files changed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `array_richcompare fast path retains res declaration`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the line-736 `PyObject *res` blocker cleared. The next first stable diagnostics are the separate C89 `Py_ssize_t vs/ws` declarations at lines 766–767, followed by later declaration, `long long`, string-size, and initializer families. Summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\\\home\\\\ubuntu\\\\Organized\\\\Legacy-Ports\\\\Projects\\\\python-win9x\\\\MSVC600\\\\VC98\\\\Bin\\\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: array_richcompare() now compiles past the fast-path res declaration family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C89 declaration-order family for Py_ssize_t vs and Py_ssize_t ws at lines 766–767. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `array_richcompare` C89 `cmp` declaration slice)

Date: 2026-09-14 19:05 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded arraymodule.c frontier was re-probed through the preceding getarrayitem() fix and remained applicable: 22 sources compiled, then arraymodule.c was the first failing source. This run addressed only the C89 declaration-order family for int cmp in array_richcompare(); later mixed-declaration families in that function remain untouched.

cpython/Modules/arraymodule.c — hoisted int cmp into array_richcompare()'s opening declaration group and removed only the fast-path declaration after executable statements. The comparison switch, assignments, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the opening-group declaration and preserving the fast-path comparison assignment sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, with source unchanged	exit 1 as required by TDD; `array_richcompare cmp declaration missing from opening group`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; 22 sources compiled and `arraymodule.c` was reached. The `int cmp` blocker cleared. The next first stable diagnostics are `arraymodule.c(736) : error C2275: 'PyObject' : illegal use of this type as an expression` for `PyObject *res` after executable statements, followed by later declaration-order, string-size, and initializer diagnostics; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh`	exit 0.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\home\\ubuntu\\Organized\\Legacy-Ports\\Projects\\python-win9x\\MSVC600\\VC98\\Bin\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings before the banner.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: array_richcompare() now compiles past the int cmp C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is its separate PyObject *res declaration at line 736. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` duplicate `getarrayitem` declaration slice)

Date: 2026-09-14 16:58 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all pre-existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single focused coding-agent delegation was attempted for frontier guidance but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded arraymodule.c frontier was not still true on re-probe: _blake2/blake2s_impl.c and the earlier sources compiled, but getarrayitem() still contained a duplicate arrayobject *ap declaration after the debug-only assertion. This run therefore followed the actual first stable blocker and addressed only that duplicate/C89 declaration-order family. The previously recorded int cmp frontier was not changed in this slice.

cpython/Modules/arraymodule.c — removed the duplicate post-#endif arrayobject *ap declaration; retained the opening declaration, later assignment, assertion, and item access unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — strengthened the existing getarrayitem() regression assertion to require exactly one ap declaration and the preserved assignment form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(633) : error C2143` at the duplicate `arrayobject *ap`, followed by parser/cascade diagnostics; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the duplicate-declaration assertion, before the source edit	exit 1 as required by TDD; `getarrayitem ap declaration is duplicated`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit and assertion-boundary correction	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the duplicate `getarrayitem()` blocker cleared. The next first stable diagnostic is the separate `arraymodule.c(726) : error C2143` for `int cmp` after executable statements; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
pristine detached `v3.11.16` worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary verification worktree removed.

Current compile-frontier state: getarrayitem() now compiles past the duplicate declaration under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate array_richcompare() int cmp C89 declaration-order family at line 726. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `getarrayitem` C89 declaration-order slice)

Date: 2026-09-14 14:49 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified compiler banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The required single focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained true: _blake2/blake2s_impl.c compiled cleanly, and arraymodule.c remained the first failing source after 22 compiled sources. The first stable diagnostic was the C89 declaration-order error at arraymodule.c(632) for arrayobject *ap after the debug-only executable assertion. This run addressed only that one declaration-order family.

cpython/Modules/arraymodule.c — hoisted arrayobject *ap before the #ifndef NDEBUG assertion block; preserved the assignment, assertion, bounds check, and item access behavior.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the ap declaration before the debug block and preserving the assignment form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`. Wine emitted expected headless-display warnings before the banner.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostic `cpython\\Modules\\arraymodule.c(632) : error C2143: syntax error : missing ';' before 'type'`; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `getarrayitem ap declaration is not before debug block`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `getarrayitem()` advanced past the blocker. The next first stable diagnostic is the separate C89 declaration-order family at `arraymodule.c(727)`, `int cmp` after executable statements; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source checks passed.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
first patch verification using `git -C build/verify-vc6-patch-worktree apply --check`	exit 128 due to an incorrect relative worktree path; no source was modified, and the temporary worktree was removed.
corrected pristine detached `v3.11.16` temporary worktree plus `git apply --check`	exit 0; patch applies cleanly; temporary worktree removed.

Current compile-frontier state: arraymodule.c now compiles past getarrayitem()'s C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate int cmp declaration-order family at line 727. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` q/QQ descriptor-width type spelling slice)

Date: 2026-09-14 12:43 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with all existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified compiler banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single focused coding-agent delegation was attempted for frontier implementation guidance but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded arraymodule.c frontier was re-probed first and remained true: 22 sources compiled, then the q/QQ descriptor entries reported error C2632: 'long' followed by 'long' is illegal at lines 572–573. This run addressed only that sizeof(long long) type-spelling family.

cpython/Modules/arraymodule.c — changed only the q/QQ descriptor item-width expressions from sizeof(long long) to sizeof(PY_LONG_LONG). Descriptor widths, typecodes, handlers, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring VC6-compatible q/QQ descriptor widths and rejecting the original sizeof(long long) forms.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(572)` and `(573)`, `error C2632: 'long' followed by 'long' is illegal`; later diagnostics began at `arraymodule.c(632)` with C89 mixed declarations; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `q descriptor does not use VC6-compatible 64-bit width`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; q/QQ `sizeof(long long)` diagnostics cleared. The next first stable diagnostics are the separate C89 declaration-order family beginning at `arraymodule.c(632)`, followed by later declaration, initializer, and string-size families; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0 for every command; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated from the complete nested checkout.
regenerated patch applied with `git -C build/verify-vc6-patch-worktree apply --check` to detached baseline `v3.11.16`	exit 0; temporary verification worktree removed.

Current compile-frontier state: the q/QQ descriptor widths now compile past their sizeof(long long) keyword family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C89 declaration-order family beginning in arraymodule.c at line 632. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `DEFINE_COMPAREITEMS` 64-bit type-argument slice)

Date: 2026-09-14 10:37 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite, invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded arraymodule.c frontier was re-probed first and remained true: 22 sources compiled, then VC6 reported the first stable long long type-argument diagnostics in the DEFINE_COMPAREITEMS(q, ...) and DEFINE_COMPAREITEMS(QQ, ...) macro invocations at lines 554–555. This run addressed only that macro-argument spelling family; later sizeof(long long) and declaration-order families remain untouched.

cpython/Modules/arraymodule.c — changed only the q and QQ DEFINE_COMPAREITEMS type arguments to PY_LONG_LONG and unsigned PY_LONG_LONG, respectively. The macro body and comparison behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring both VC6-compatible macro arguments and rejecting the original long long spellings.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(554)` and `(555)`, `error C2632: 'long' followed by 'long' is illegal`, followed by later `sizeof(long long)` diagnostics at `(572)` and `(573)`; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `signed q compare macro argument is not VC6-compatible`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the macro-invocation `long long` diagnostics at `(554)` and `(555)` cleared. The next first stable diagnostics are the separate `sizeof(long long)` family at `(572)` and `(573)`, followed by later declaration-order and initializer families; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0 for every command; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated from the nested checkout.

Current compile-frontier state: the DEFINE_COMPAREITEMS q/QQ macro invocations now compile past their long long keyword family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate sizeof(long long) family in the arraymodule.c descriptor table. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `DEFINE_COMPAREITEMS` C89 loop-declaration slice)

Date: 2026-09-14 08:30 UTC

The recorded arraymodule.c frontier was re-probed first and remained true: 22 sources compiled, then VC6 failed at DEFINE_COMPAREITEMS invocation line 544 because the macro expanded for (Py_ssize_t i = 0; ...). This run addressed only that C89 loop-declaration family.

cpython/Modules/arraymodule.c — added Py_ssize_t i; to DEFINE_COMPAREITEMS's declaration group and changed the loop to for (i = 0; ...). Comparison order, bounds, increment, and return behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe macro declaration and loop form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were the C89 `for (Py_ssize_t i = ...)` expansion at `arraymodule.c(544)` with `error C2143`, followed by parser fallout; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `arraymodule compare macro loop counter declaration missing`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; the C89 loop-declaration blocker cleared. The next first stable diagnostics are the separate `long long` macro-type arguments at `arraymodule.c(554)`, `(555)`, `(572)`, and `(573)`, followed by later declaration-order and initializer families; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0 for every command; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated from the nested checkout only.
regenerated patch applied with `git -C <pristine-worktree> apply --check` at baseline commit	exit 0; temporary detached verification worktree removed.

Current compile-frontier state: DEFINE_COMPAREITEMS now compiles past its C89 loop-declaration family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate long long type-argument family in the macro invocations. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` q/QQ VC6 64-bit-type spelling slice)

Date: 2026-09-14 06:24 UTC

The recorded arraymodule.c frontier was re-probed first and remained true: 22 sources compiled, then VC6 reported the first stable long long keyword diagnostics in q_getitem(), q_setitem(), QQ_getitem(), and QQ_setitem() at lines 449–491. This run addressed only that active signed/unsigned 64-bit type-spelling family, using the existing PY_LONG_LONG abstraction.

cpython/Modules/arraymodule.c — replaced the live long long and unsigned long long declarations/casts in the q/QQ handlers with PY_LONG_LONG and unsigned PY_LONG_LONG. Function calls, widths, pointer casts, conversion behavior, and control flow are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring both VC6-compatible spellings and rejecting live long long keywords in that handler family.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first stable diagnostics were `arraymodule.c(449)`, `(455)`, `(459)`, `(467)`, `(473)`, `(484)`, and `(491)`, `error C2632: 'long' followed by 'long' is illegal`; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `arraymodule q/QQ handlers use VC6-compatible 64-bit type spellings` failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; q/QQ `long long` diagnostics cleared. The next first stable blocker is the separate C89 `for (Py_ssize_t i = ...)` family in `DEFINE_COMPAREITEMS` at `arraymodule.c(544)`; remaining later diagnostics include the macro's `long long` type arguments and additional declaration-order errors. Summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh; bash scripts/vc6-probe.test.sh; bash scripts/vc6-probe-core.test.sh; bash scripts/vc6-probe-pathcch.test.sh; bash scripts/generate-getpath-frozen.test.sh; bash scripts/vc6-probe-stdint.test.sh; bash scripts/vc6-probe-pythoncore-frontier.test.sh; git -C cpython diff --check`	exit 0 for every command; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated from the nested checkout only.
regenerated patch applied with `git -C <pristine-worktree> apply --check` at baseline commit	exit 0; temporary detached verification worktree removed.

Current compile-frontier state: the q/QQ handlers now compile past their live long long keyword family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C89 loop-declaration family in DEFINE_COMPAREITEMS at arraymodule.c(538), first surfaced at invocation line 544. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`arraymodule.c` `u_setitem` C89 declaration-order slice)

Date: 2026-09-14 04:17 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite, invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; the verified compiler banner is Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The required single focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained true: 22 sources compiled, then Modules/arraymodule.c was the first failing source. This run addressed only the C89 mixed-declaration family in u_setitem() at the len and w locals.

cpython/Modules/arraymodule.c — hoisted Py_ssize_t len and wchar_t w into u_setitem()'s declaration group; changed the first declaration-with-initializer to an assignment and removed the later w declaration. The PyUnicode_AsWideChar() call order and error/control-flow behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declarations and preserving both u_setitem() conversion calls.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 22 sources compiled; first blocker `arraymodule.c(265)` reported `error C2275: 'Py_ssize_t' : illegal use of this type as an expression`, with the related `wchar_t` declaration at line 272 and later cascade diagnostics; summary `total=23 compiled=22 cached=0 skipped=0`.
focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `arraymodule u_setitem uses C89 declaration-order-safe len and w locals` failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `arraymodule.c` passed the `u_setitem()` family. The next first stable blocker is the separate `long long` family at lines 449, 455, 459, 467, 473, 484, and 491, followed by C89 `for`-initializer diagnostics; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh; bash scripts/vc6-probe.test.sh; bash scripts/vc6-probe-core.test.sh; bash scripts/vc6-probe-pathcch.test.sh; bash scripts/generate-getpath-frozen.test.sh; bash scripts/vc6-probe-stdint.test.sh; bash scripts/vc6-probe-pythoncore-frontier.test.sh; git -C cpython diff --check`	exit 0 for every command; all applicable regression suites and source checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: arraymodule.c now compiles past u_setitem()'s C89 declaration-order family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate long long family in arraymodule.c. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_struct.c` PyModuleDef positional-initializer slice)

Date: 2026-09-14 02:10 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite, invoked through Wine with WINEPREFIX=/home/ubuntu/.wine-win9xport; compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single focused coding-agent delegation was attempted but failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded _blake2/blake2s_impl.c state was re-probed first and was no longer the live frontier: it compiled cleanly. The actual first blocker was _struct.c(2484), a C99 designated initializer. This run addressed only that initializer family.

cpython/Modules/_struct.c — converted _structmodule to positional PyModuleDef initialization in declared field order (m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free). Values and behavior are preserved.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer and rejecting designated fields.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled cleanly and `_struct.c(2484)` reported `error C2059: syntax error : '.'`; summary `total=21 compiled=20 cached=0 skipped=0`.
Focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before source edit	exit 1 as required by TDD; `_structmodule positional initializer mismatch`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edit	exit 2; `_struct.c` compiled cleanly. The first blocker advanced to `Modules/arraymodule.c(265)`, beginning with `error C2275: 'Py_ssize_t' : illegal use of this type as an expression`, followed by C89 mixed declarations, `long long`, and other diagnostics; summary `total=23 compiled=22 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _struct.c now compiles cleanly under MSVC6 (cl.exe 12.00.8804) through Wine, advancing the frontier to Modules/arraymodule.c. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_struct.c C89 declaration-order frontier slice`)

Date: 2026-09-14 00:04 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite, invoked through Wine on Linux with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified compiler banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The required single focused coding-agent delegation was attempted, but the delegation runtime failed before launch because the anthropic package is unavailable; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained true: _blake2/blake2s_impl.c compiled cleanly, and _struct.c was the first failing source. This run addressed only the C89 declaration-order family at s_new(), s_dealloc(), and s_pack(); the later designated initializer remains untouched.

cpython/Modules/_struct.c — hoisted alloc_func in s_new(), tp and free_func in s_dealloc(), and writer in s_pack() into declaration groups before executable statements; preserved each initializer's original execution point and all control flow/refcount behavior.
scripts/vc6-probe-pythoncore-frontier.test.sh — added focused TDD assertions covering all three functions.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 20 sources compiled, then `_struct.c` reported the first stable C89 declaration-order blockers at lines 1447, 1530, and 1923.
Focused coding-agent delegation	failed before launch: `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding assertions, before source edits	exit 1 as required by TDD; the new assertion failed with `s_new: declaration not hoisted`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after source edits	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after source edits	exit 2; `_struct.c` compiled cleanly (no `_struct.c` diagnostics), and the first blocker advanced to the separate designated initializer at `_struct.c(2484)`; summary `total=21 compiled=20 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all applicable regression suites reported `ALL TESTS PASSED`.
`git -C cpython diff --check && bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a clean detached `v3.11.16` temporary worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _struct.c now compiles past the C89 declaration-order family under MSVC6 through Wine. The next narrow frontier is the separate C99 designated initializer at line 2484. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_struct.c` MSVC6 `long long` keyword compatibility slice)

Date: 2026-09-13 21:58 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. MSVC6 remains an external/local-only prerequisite, invoked through Wine on Linux with WINEPREFIX=/home/ubuntu/.wine-win9xport; verified compiler banner: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86. The single requested coding-agent implementation attempt was made but could not start because the delegation runtime lacks the anthropic package; no child changes or independent review are claimed.

The recorded frontier was re-probed first and remained true: _blake2/blake2s_impl.c compiled cleanly, and _struct.c was the first failing source. This run addressed only the distinct long long keyword family. The later _struct.c declaration-order and designated-initializer blockers remain untouched.

cpython/Modules/_struct.c — replaced live signed long long spellings with PY_LONG_LONG, live unsigned spellings with unsigned PY_LONG_LONG, and updated the two sign-extension casts and native-size calculations. Integer widths and runtime operations are unchanged; comments and user-facing format documentation retain their original wording.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion that strips comments/module documentation and rejects live long long keywords while requiring the complete PY_LONG_LONG replacement family.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 20 sources compiled, then `_struct.c` reported the first stable `error C2632: 'long' followed by 'long' is illegal` family at lines 103, 211, 213, 221, 234, 236, 244, 493, 501, 702, 712, 801–802, 843, 851, 858, 1064, 1072, and 1079. Later independent blockers were at 1447/1530/1923 and 2480. Summary `total=21 compiled=20 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; the new `_struct` assertion failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit and assertion matcher corrections	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; all `_struct.c` `long long` diagnostics cleared. The first stable blocker advanced to `_struct.c(1447)` C89 declaration ordering, followed by 1530/1923 declaration-order diagnostics and the designated initializer at 2480. Summary `total=21 compiled=20 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; every applicable suite reported `ALL TESTS PASSED`.
`git -C cpython diff --check`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _struct.c now compiles past the long long keyword family under MSVC6 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _struct.c's C89 declaration-order family at lines 1447, 1530, and 1923. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_struct.c` MSVC6 `_Bool` compatibility slice)

Date: 2026-09-13 19:48 UTC

The recorded _blake2/blake2s_impl.c state was re-probed first and was no longer the live frontier: _blake2s_impl.c compiled cleanly. The actual first stable blocker was _struct.c; this run addressed only the missing C99 _Bool defect family. A single focused Codex implementation lane ran in an isolated temporary snapshot; its candidate was inspected and copied manually. No independent review is claimed.

cpython/Modules/_struct.c — added a guarded MSVC6-only typedef unsigned char _Bool;, preserving the one-byte layout required by the module's native ? format handling. No other _struct.c defect family was changed.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the guarded one-byte typedef.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 20 sources compiled, then `_struct.c` first reported `_Bool` syntax/undeclared diagnostics at lines 85, 94, 504, 719, and related fallout. Summary `total=21 compiled=20 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `_struct provides a guarded one-byte VC6 _Bool compatibility typedef` failed.
focused Codex implementation lane in `/tmp/python-win9x-codex-struct`	exit 0; changed only `cpython/Modules/_struct.c`; its focused test ended with `ALL TESTS PASSED`. Candidate diff was inspected before manual application.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; all `_Bool` diagnostics cleared. The first stable blocker remains `_struct.c`'s separate `long long` keyword family, followed by C89 mixed declarations at lines 1447/1530/1923 and a designated initializer at line 2480. Summary `total=21 compiled=20 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch regenerated. Existing generated patch payload retains its previously documented trailing-whitespace lines.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _blake2/blake2s_impl.c and _struct.c through the _Bool family compile past this slice under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _struct.c's long long keyword compatibility family. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_stat.c` `statmodule` positional-initializer slice)

Date: 2026-09-13 17:40 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required focused coding-agent delegation could not start because the delegation runtime requires the unavailable anthropic package; implementation and verification were performed directly, with no independent review claimed. The MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86, invoked through Wine on Linux.

The recorded _stat.c state was re-probed first and remained true: 19 sources compiled, then VC6 reported only the statmodule C99 designated initializer at line 635. This run addressed only that designated-initializer defect family.

cpython/Modules/_stat.c — converted statmodule to positional PyModuleDef initialization in declared field order (m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free). The previously implicit trailing fields are explicitly NULL; names, values, and module behavior are preserved.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional initializer and rejecting designated fields.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 19 sources compiled; `_stat.c(635)` reported `error C2059: syntax error : '.'`; summary `total=20 compiled=19 cached=0 skipped=0`.
focused coding-agent delegation	not started; runtime reported `The 'anthropic' package is required for the Anthropic provider`; no child changes were used.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `statmodule positional initializer mismatch`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_stat.c` compiled cleanly and the first stable blocker advanced to `_struct.c`; summary `total=21 compiled=20 cached=0 skipped=0`. First `_struct.c` diagnostics include undeclared/unsupported `_Bool`, illegal `long long`, declaration-order errors, and a later designated initializer at line 2475.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites, shell syntax checks, and nested source diff checks passed.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c && bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 for both compile probes.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _stat.c now compiles cleanly under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _struct.c, beginning with its _Bool/long long compatibility diagnostics. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_stat.c` Win9x/VC6 header-constant availability slice)

Date: 2026-09-13 15:33 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The MSVC6 banner remains Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86, invoked through Wine on Linux. One focused Codex implementation lane (codex-cli 0.153.4) used an isolated temporary worktree; its candidate was inspected and the narrow source change was applied to the real checkout. No independent review is claimed.

The recorded _blake2/blake2s_impl.c state was re-probed first and remained clean. The actual first stable blocker was _stat.c: the VC6 headers lacked FILE_ATTRIBUTE_DEVICE, FILE_ATTRIBUTE_VIRTUAL, and IO_REPARSE_TAG_SYMLINK. This run addressed only that header-constant availability family; the later _stat.c designated initializer remains untouched.

cpython/Modules/_stat.c — added guarded fallbacks in the existing MS_WINDOWS section: FILE_ATTRIBUTE_DEVICE 0x0040, FILE_ATTRIBUTE_VIRTUAL 0x10000, and IO_REPARSE_TAG_SYMLINK 0xA000000CL. The #ifndef guards preserve any definitions supplied by a newer Windows header.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring all three guarded definitions and exact values.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 19 sources compiled; _stat.c(580), (594), and (597) reported undeclared FILE_ATTRIBUTE_DEVICE, FILE_ATTRIBUTE_VIRTUAL, and IO_REPARSE_TAG_SYMLINK, followed by the designated-initializer error at line 622; summary total=20 compiled=19 cached=0 skipped=0. | | isolated codex exec -s workspace-write --skip-git-repo-check ... implementation lane | exit 0; its focused assertion produced RED exit 1 naming all three missing guards, then GREEN exit 0 after the candidate edit. Its attempted VC6 probe was blocked before compilation by Wine wineserver: mkdir /run/user/1000/wine/...: Read-only file system; no child changes were copied automatically. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the focused assertion, before the source edit | exit 1 as required by TDD; _stat provides guarded VC6/Win9x file-attribute fallbacks failed with FILE_ATTRIBUTE_DEVICE. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after the source edit | exit 0; all focused assertions passed. | | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after the source edit | exit 2; _stat.c advanced past the three missing-constant diagnostics. The next first stable blocker is the separate C99 designated initializer at _stat.c(635); summary total=20 compiled=19 cached=0 skipped=0. | | bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh; bash scripts/vc6-probe.test.sh; bash scripts/vc6-probe-core.test.sh; bash scripts/vc6-probe-pathcch.test.sh; bash scripts/generate-getpath-frozen.test.sh; bash scripts/vc6-probe-stdint.test.sh; bash scripts/vc6-probe-pythoncore-frontier.test.sh; git -C cpython diff --check | exit 0; all applicable regression suites, shell syntax checks, and nested source diff checks passed. | | git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; compatibility patch regenerated. | | regenerated patch applied with git apply --check to a pristine temporary detached v3.11.16 worktree | exit 0; temporary worktree removed. |

Current compile-frontier state: _stat.c now compiles past the missing Win9x/VC6 header-constant family under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _stat.c's PyModuleDef C99 designated initializer at line 635. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_stat.c` `stat_exec` C89 declaration-order slice)

Date: 2026-09-13 13:27 UTC

The recorded _sre/sre.c frontier was re-probed before editing and remained clear. The actual first stable blocker was Modules/_stat.c: stat_exec() declared st_constants and the for loop counter after executable ADD_INT_MACRO calls, producing VC6/C89 declaration-order diagnostics at lines 557 and 570. This run made only that one defect-family fix; the later missing Win32 constants and designated initializer remain untouched.

cpython/Modules/_stat.c — moved the unchanged st_constants table and an int i declaration into stat_exec()'s opening declaration group; changed the loop to use for (i = 0; ...). Constant order, assigned values, registration order, and immediate error returns are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the table and loop counter before the first executable macro call and rejecting the C99 loop declaration.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 19 sources compiled; _stat.c(557) and (570) reported C89 mixed-declaration errors, followed by parser fallout and missing FILE_ATTRIBUTE_DEVICE, FILE_ATTRIBUTE_VIRTUAL, and IO_REPARSE_TAG_SYMLINK, plus the later designated-initializer error at line 621; summary total=20 compiled=19 cached=0 skipped=0. | || codex exec -s read-only --skip-git-repo-check ... focused frontier inspection | exit 0; recommended moving st_constants and hoisting int i; no files changed. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the focused assertion, before the source edit | exit 1 as required by TDD after correcting the assertion's extraction boundary; _stat stat_exec uses C89 declaration-order-safe constants and loop counter failed while prior assertions passed. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after the source edit | exit 0; all focused assertions passed. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after the source edit | exit 2; _stat.c advanced past the C89 declaration-order family. Remaining first diagnostics are missing FILE_ATTRIBUTE_DEVICE, FILE_ATTRIBUTE_VIRTUAL, and IO_REPARSE_TAG_SYMLINK, followed by the statmodule designated initializer at line 622; summary total=20 compiled=19 cached=0 skipped=0. | || bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check | exit 0; all applicable regression suites and nested source diff checks passed. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; compatibility patch regenerated. | || regenerated patch applied with git apply --check to a pristine temporary detached v3.11.16 worktree | exit 0; temporary worktree removed. |

Current compile-frontier state: Modules/_stat.c now compiles past its C89 declaration-order blocker under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the distinct Win9x/VC6 header-constant availability group (FILE_ATTRIBUTE_DEVICE, FILE_ATTRIBUTE_VIRTUAL, IO_REPARSE_TAG_SYMLINK), followed by the statmodule C99 designated initializer. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre.c` `sremodule` PyModuleDef designated-initializer slice)

Date: 2026-09-13 11:20 UTC

The recorded _sre/sre.c frontier was re-probed before editing and remained true: 18 sources compiled, then VC6 reported the sremodule PyModuleDef C99 designated-initializer family at line 3031. This run made only that defect-family fix.

cpython/Modules/_sre/sre.c — converted sremodule from designated initializers to positional PyModuleDef initialization in declared field order (m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free). The previously omitted m_doc is explicitly NULL; field values, order, and behavior are preserved.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the exact positional sremodule initializer and rejecting designated fields.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 18 sources compiled; `_sre.c(3031)` reported `error C2059: syntax error : '.'` and `','`; summary `total=19 compiled=18 cached=0 skipped=0`.
isolated `codex exec -s workspace-write ...` focused implementation lane	exit 0 in a temporary worktree; candidate source edit and an extra upstream test-file change were inspected, but the temporary worktree was removed and only the narrow source shape was applied to the real checkout.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `sremodule positional initializer mismatch` and `not ok - _sre sremodule uses C89-compatible positional initializers`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; all focused assertions passed.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_sre/sre.c` compiled cleanly and the first stable blocker advanced to `Modules/_stat.c`; first diagnostics include C89 declaration-order errors at lines 557/570, missing `FILE_ATTRIBUTE_DEVICE`, `FILE_ATTRIBUTE_VIRTUAL`, `IO_REPARSE_TAG_SYMLINK`, and a designated-initializer error at line 621; summary `total=20 compiled=19 cached=0 skipped=0`.
`bash -n ... && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all applicable regression suites and source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine temporary detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _sre/sre.c now compiles cleanly under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is Modules/_stat.c; it must be re-probed and addressed one defect family at a time. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre.c` ADD_ULONG_CONSTANT C89 declaration-order slice)

Date: 2026-09-13 09:10 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. One focused Codex delegation ran read-only with codex-cli 0.153.4; it confirmed the smallest safe slice and made no changes. No independent review is claimed. The relevant legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md.

The recorded _sre/sre.c designated-initializer frontier was re-probed before editing and was no longer the live first blocker: the actual first stable diagnostics were the C89 mixed declarations inside ADD_ULONG_CONSTANT at lines 2982 and 2985. This run made only that one defect-family fix; the later sremodule designated initializers remain untouched.

cpython/Modules/_sre/sre.c — changed the macro-local int res = PyModule_AddObjectRef(...) to an opening int res; declaration followed by assignment after the existing if (!o) goto error;. Allocation, NULL handling, module insertion, decref ordering, error jump, both call sites, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe macro shape and preserving the operation sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 18 sources compiled; `_sre/sre.c(3011)` and `(3012)` expanded `ADD_ULONG_CONSTANT` and reported C89 declaration-order diagnostics at macro lines 2982 and 2985, followed by parser fallout; summary `total=19 compiled=18 cached=0 skipped=0`.
`codex exec -s read-only --skip-git-repo-check "...inspect only the live VC6 frontier..."`	exit 0; read-only analysis identified the minimal `ADD_ULONG_CONSTANT` `res` hoist and no semantic risk; no files changed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; the new `_sre ADD_ULONG_CONSTANT` assertion failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the `ADD_ULONG_CONSTANT` diagnostics cleared. The next first stable blocker is `_sre/sre.c(3031)`, the separate `sremodule` C99 designated-initializer family; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && git -C cpython diff --check`	exit 0; all regression suites passed and the nested source diff was clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine temporary detached `v3.11.16` worktree	exit 0; temporary worktree removed.

Current compile-frontier state: _sre/sre.c now compiles past the ADD_ULONG_CONSTANT C89 declaration-order defect under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate sremodule PyModuleDef designated-initializer family at lines 3030–3037. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre.c` PyType_Spec designated-initializer slice)

Date: 2026-09-13 07:04 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required focused coding-agent delegation was attempted, but the delegation runtime could not start because the anthropic package is unavailable; no child changes or independent review were used. The relevant legacy-toolchain reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md.

The recorded _sre/sre.c frontier was re-probed before editing and remained true: 18 sources compiled, then VC6 reported three C99 designated initializers in pattern_spec, match_spec, and scanner_spec at lines 2826, 2894, and 2924. This run made only that designated-initializer defect-family fix.

cpython/Modules/_sre/sre.c — converted pattern_spec, match_spec, and scanner_spec from C99 designated initializers to positional PyType_Spec initializers in declared field order (name, basicsize, itemsize, flags, slots). The omitted scanner_spec.itemsize is explicitly 0, preserving C99 zero-initialization; values and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring all three positional initializer blocks and rejecting the old designated form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; 18 sources compiled; `_sre/sre.c` first reported `error C2059: syntax error : '.'` at lines 2826, 2894, and 2924, followed by parser fallout at lines 3010+; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; the new positional-`PyType_Spec` assertion failed with `pattern_spec` while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the three `_sre` `PyType_Spec` designated-initializer diagnostics cleared. The next stable blocker is the `_sre/sre.c` `ADD_ULONG_CONSTANT` macro's C89 mixed declarations at lines 2982 and 2985, followed by the `sremodule` `PyModuleDef` designated initializers; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh` plus public/core/PathCch/getpath/stdint/frontier regression suites and `git -C cpython diff --check`	exit 0; every regression suite reported `ALL TESTS PASSED`, and the nested source diff was clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine temporary detached `v3.11.16` worktree	exit 0; temporary worktree removed.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call ...\\VCVARS32.BAT && cl'`	exit 0; compiler banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.

Current compile-frontier state: the three _sre/sre.c PyType_Spec designated initializers now compile past VC6/MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate sremodule PyModuleDef designated-initializer family at lines 3030–3037. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre.c` GROUPREF_EXISTS `rc` C89 declaration-order slice)

Date: 2026-09-13 04:58 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required focused coding-agent delegation was attempted, but the delegation runtime could not start because the anthropic package is unavailable; no child changes or independent review were used. The relevant local reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md.

The recorded _sre/sre_lib.h frontier was re-probed before editing and remained true through that file. The first stable blocker was _sre/sre.c(1925), a C89 declaration-order defect: int rc = _validate_inner(...) followed the executable VTRACE statement in the SRE_OP_GROUPREF_EXISTS case. This run made only that defect-family fix.

cpython/Modules/_sre/sre.c — hoisted int rc into _validate_inner()'s opening declaration group and changed the later declaration-with-initializer to rc = _validate_inner(...). The assignment timing, validation branches, control flow, and behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused TDD assertion requiring the function-level C89 declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | ||---|---| || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; 18 sources compiled; _sre/sre.c(1925) reported error C2143: syntax error : missing ';' before 'type' for int rc = ..., followed by rc undeclared and later _sre diagnostics; summary total=19 compiled=18 cached=0 skipped=0. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the focused assertion, before the source edit | exit 1 as required by TDD; _sre GROUPREF_EXISTS uses C89 declaration-order-safe rc local failed while prior assertions passed. | || bash scripts/vc6-probe-pythoncore-frontier.test.sh after the source edit | exit 0; ALL TESTS PASSED. | || VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after the source edit | exit 2; the rc blocker cleared and _sre.c reached the next distinct blockers: designated initializers at lines 2826, 2894, and 2924, followed by later declaration/designated-initializer diagnostics; summary total=19 compiled=18 cached=0 skipped=0. | || bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check | exit 0; all regression suites passed and the nested source diff was clean. | || git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; compatibility patch regenerated. | || regenerated patch applied with git apply --check to a pristine detached v3.11.16 worktree | exit 0; temporary verification worktree removed. |

Current compile-frontier state: _sre/sre.c now compiles past the GROUPREF_EXISTS rc declaration-order defect under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C99 designated-initializer family at _sre/sre.c lines 2826, 2894, and 2924. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre_lib.h` MIN_UNTIL repeat local C89 declaration-order slice)

Date: 2026-09-13 02:48 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required focused coding-agent delegation was attempted with the installed Codex launcher, but the delegation runtime could not start because the anthropic package is unavailable; no child changes or independent review were used. The relevant local reference was read from /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md.

The recorded _sre/sre_lib.h frontier was re-probed before editing and remained true: _sre/sre.c was the first failing source after 18 compiled sources, with sre_lib.h(1215) : error C2275: 'SRE_REPEAT' : illegal use of this type as an expression at SRE_REPEAT *repeat_of_tail = state->repeat;. This run made only that one C89 mixed-declaration defect-family fix.

cpython/Modules/_sre/sre_lib.h — hoisted SRE_REPEAT *repeat_of_tail into SRE(match)'s opening declaration group and changed the later declaration to repeat_of_tail = state->repeat;. Assignment timing, repeat restoration, mark-stack handling, control flow, and matching behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `getpath.c`, `_abc.c`, `_bisectmodule.c`, both `_blake2` implementations, `_codecsmodule.c`, `_collectionsmodule.c`, `_contextvarsmodule.c`, `_csv.c`, `_functoolsmodule.c`, `_heapqmodule.c`, `_json.c`, `_localemodule.c`, `_lsprof.c`, `_pickle.c`, `_randommodule.c`, and `_sha3/sha3module.c` compiled; `_sre/sre_lib.h(1215)` reported `error C2275: 'SRE_REPEAT' : illegal use of this type as an expression`, followed by `repeat_of_tail` undeclared and later `_sre.c` diagnostics; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; `_sre MIN_UNTIL uses C89 declaration-order-safe repeat local` failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit and assertion-boundary correction	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; the `sre_lib.h(1215)` blocker cleared. The next first stable blockers are `_sre/sre.c(1925)` C89 declaration-order (`rc`), then designated initializers at lines 2825, 2893, 2923, and later declaration/designated-initializer diagnostics; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && git -C cpython diff --check`	exit 0.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all regression suites reported `ALL TESTS PASSED`.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary verification worktree removed.

Current compile-frontier state: _sre/sre_lib.h now compiles past the MIN_UNTIL repeat_of_tail C89 declaration-order defect under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _sre/sre.c(1925), the separate C89 mixed-declaration rc defect. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sre/sre_lib.h` SRE(match) C89 declaration-order slice)

Date: 2026-09-13 00:41 UTC

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required focused coding-agent delegation was attempted with Claude Code, but authentication failed with 401 OAuth access token has been revoked; no child changes or independent review were used. The referenced local python-3-win9x-msvc6.md document was not present at the expected skill-reference path.

The recorded _blake2/blake2s_impl.c state was re-probed before editing and remained clean, so the actual first stable blocker was followed instead: _sre/sre_lib.h(586), where SRE(match) declared const SRE_CHAR *ptr after an executable statement and an entrance: label, violating VC6/C89 declaration ordering. This run made only that one defect-family fix.

cpython/Modules/_sre/sre_lib.h — added const SRE_CHAR *ptr; to SRE(match)'s opening declaration group and changed the later declaration to ptr = (SRE_CHAR *)state->ptr;. The label, assignment point, control flow, and matching behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a focused TDD assertion requiring the C89-safe declaration and assignment shape.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_blake2/blake2s_impl.c` compiled cleanly, then `_sre/sre.c` reached `_sre/sre_lib.h(586) : error C2143: syntax error : missing ';' before 'const'`, with parser-cascade diagnostics; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD after correcting the assertion's extraction boundary; `_sre SRE(match) uses C89 declaration-order-safe ptr local` failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_sre/sre_lib.h` cleared the `ptr` declaration-order blocker. The next first stable blocker is `_sre/sre_lib.h(1215) : error C2275: 'SRE_REPEAT' : illegal use of this type as an expression` at `SRE_REPEAT *repeat_of_tail = state->repeat;`, followed by `_sre.c` declaration/designated-initializer errors; summary `total=19 compiled=18 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all regression suites and nested source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary verification worktree removed.

Current compile-frontier state: SRE(match) now compiles past the line-586 C89 declaration-order defect under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is the separate C89 mixed-declaration SRE_REPEAT *repeat_of_tail at _sre/sre_lib.h(1215). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sha3/sha3module.c` designated-initializer slice)

Date: 2026-09-12 22:35 UTC

The recorded _sha3/sha3module.c state was re-probed before editing and remained true: SHA3_dealloc() was already clean, while seven C99 designated initializers in the SHA3_TYPE_SPEC macro and _sha3module produced VC6 error C2059: syntax error : '.' diagnostics. This run made only that designated-initializer defect-family fix.

cpython/Modules/_sha3/sha3module.c — converted SHA3_TYPE_SPEC to positional PyType_Spec initialization in declared field order (name, basicsize, explicit itemsize zero, flags, slots), and converted _sha3module to positional PyModuleDef initialization in declared field order. Values and field order are preserved; no runtime behavior or control flow changed.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring both _sha3 initializer groups to be positional.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `_sha3/sha3module.c` was reached after 17 compiled sources and reported seven `error C2059: syntax error : '.'` diagnostics at lines 444, 447, 450, 453, 569, 572, and 651; `total=18 compiled=17 cached=0 skipped=0`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; the new `_sha3` positional-initializer assertion failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_sha3/sha3module.c` compiled with no diagnostics and the first blocker advanced to `_sre/sre.c`, beginning with `_sre/sre_lib.h(586) : error C2143: syntax error : missing ';' before 'const'`, followed by parser-cascade diagnostics; `total=19 compiled=18 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all regression suites reported `ALL TESTS PASSED`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
regenerated patch applied with `git apply --check` to a pristine detached `v3.11.16` worktree	exit 0; temporary verification worktree removed.

Current compile-frontier state: _sha3/sha3module.c now compiles cleanly under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next narrow frontier is _sre/sre.c, whose first stable blocker is the C89 declaration-order defect in sre_lib.h at line 586. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_sha3/sha3module.c` `SHA3_dealloc` C89 declaration-hoist slice)

Date: 2026-09-12 20:28 UTC

The recorded _blake2/blake2s_impl.c state was re-probed before editing and was no longer the live frontier: _blake2/blake2s_impl.c compiled cleanly. The first stable blocker was instead _sha3/sha3module.c(183), where SHA3_dealloc() declared PyTypeObject *tp = Py_TYPE(self); after executable lock cleanup, violating VC6/C89 declaration ordering. This run made only that one defect-family fix.

cpython/Modules/_sha3/sha3module.c — hoisted PyTypeObject *tp into SHA3_dealloc()'s opening declaration group and changed the original declaration to tp = Py_TYPE(self);. Lock freeing, type lookup timing, object freeing, and type decref order are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the C89-safe declaration and preserving the cleanup/type/refcount sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff.
PORT_STATUS.md — this report.

Exact command results:

|| Command | Result | |---|---| | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh before this slice | exit 2; _blake2/blake2s_impl.c compiled cleanly, then _sha3/sha3module.c(183) : error C2275: 'PyTypeObject' : illegal use of this type as an expression; designated-initializer diagnostics followed at lines 442, 445, 448, 451, 567, 570, and 649; total=18 compiled=17 cached=0 skipped=0. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after adding the focused assertion, before the source edit | exit 1 as required by TDD; the new SHA3_dealloc assertion failed while prior assertions passed. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after the source edit, before correcting the assertion's sequence matcher | exit 1; the source shape was correct but the newly added matcher incorrectly compared the function body without its signature. | | bash scripts/vc6-probe-pythoncore-frontier.test.sh after correcting the assertion | exit 0; ALL TESTS PASSED. | | VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh after the source edit | exit 2; _sha3/sha3module.c cleared the SHA3_dealloc() blocker. New first blockers are the seven C99 designated initializers in the SHA3 type specs and _sha3module (error C2059: syntax error : '.'); total=18 compiled=17 cached=0 skipped=0. | | bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh | exit 0; all regression suites reported ALL TESTS PASSED. | | bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check | exit 0. | | git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch | exit 0; compatibility patch regenerated. | | regenerated patch applied with git apply --check to a pristine detached v3.11.16 worktree | exit 0; temporary verification worktree removed. |

Current compile-frontier state: SHA3_dealloc() now compiles cleanly under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next blocker is the separate C99 designated-initializer family in _sha3/sha3module.c. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution.

Latest revision (`_randommodule.c` `_random_exec` C89 declaration-hoist slice)

Date: 2026-09-12 18:22 UTC

The recorded _pickle.c state was re-probed before editing and remained true through _pickle.c; the first stable blocker was the recorded _randommodule.c(599) C89 mixed-declaration defect. This run made only that one defect-family fix in _random_exec().

cpython/Modules/_randommodule.c — hoisted PyObject *longval and PyObject *longtype into _random_exec()'s opening declaration group, then changed only their original initializers to assignments. Allocation, NULL checks, Py_DECREF order, and error returns are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring C89-safe declarations and preserving the _random_exec() allocation/error/refcount sequence.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff and verified against a pristine v3.11.16 worktree.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
codex exec -s read-only --skip-git-repo-check "In /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x, inspect the current CPython v3.11.16 Windows 98/MSVC6 port state without modifying any files. Focus only on the recorded frontier in Modules/_randommodule.c at _random_exec(), especially the C89 mixed-declaration blocker around longval/longtype. Report the smallest evidence-backed edit, the exact focused test assertion that should be added first under strict TDD, and any semantic risks. Do not edit, commit, reset, stash, or push."	exit 0; read-only focused analysis reported the minimal two-local hoist and no semantic risk beyond preserving initializer timing. No files changed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; `_random_exec uses C89 locals and preserves initialization order` failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0; `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_randommodule.c` compiled cleanly and the frontier advanced to `_sha3/sha3module.c(183)`, `error C2275: 'PyTypeObject' : illegal use of this type as an expression`, followed by designated-initializer `error C2059` diagnostics at lines 442, 445, 448, 451, 567, 570, and 649; `total=18 compiled=17 cached=0 skipped=0`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport wine cmd /c 'call Z:\\home\\ubuntu\\Organized\\Legacy-Ports\\Projects\\python-win9x\\MSVC600\\VC98\\Bin\\VCVARS32.BAT && cl'`	exit 0; compiler banner: Microsoft 32-bit C/C++ Optimizing Compiler Version `12.00.8804` for 80x86.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all regression suites and nested source diff checks passed.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
`git -C cpython worktree add --detach /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x/build/verify-vc6-patch-worktree v3.11.16 && git -C /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x/build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; patch applied cleanly to a pristine detached baseline, and the temporary worktree was removed.

Current compile-frontier state: _randommodule.c now compiles cleanly under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next blocker is _sha3/sha3module.c's C89 declaration-order and C99 designated-initializer defects. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` Unpickler_set_memo SIZE_MAX cleanup slice)

Date: 2026-09-12 16:15 UTC

The recorded _blake2/blake2s_impl.c state was re-probed before editing and was no longer the live frontier: the full source-list probe reached _pickle.c and reported the distinct missing SIZE_MAX blocker. This run therefore made only the actual first-frontier _pickle.c fix.

cpython/Modules/_pickle.c — changed Unpickler_set_memo() cleanup from for (i = new_memo_size - 1; i != SIZE_MAX; i--) to for (i = new_memo_size; i-- > 0;). The loop still decrements through exactly new_memo_size - 1 to 0, preserving decref order and cleanup behavior without relying on the unavailable VC6 SIZE_MAX definition.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for the no-SIZE_MAX cleanup loop and updated the existing Unpickler_set_memo() assertion to require the new C89-safe form.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff and verified against a pristine v3.11.16 worktree.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; `_pickle.c(7638)`, `error C2065: 'SIZE_MAX' : undeclared identifier`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the new assertion, before the source edit	exit 1 as required by TDD; the new cleanup assertion failed, while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit and test adjustment	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_pickle.c` compiled cleanly and the frontier advanced to `_randommodule.c(599)`, `error C2275: 'PyObject' : illegal use of this type as an expression`; `total=17 compiled=16 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && git -C cpython diff --check`	exit 0; all regression suites passed and the nested source diff is clean.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; compatibility patch regenerated.
pristine detached `v3.11.16` worktree `git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; temporary verification worktree removed.

Current compile-frontier state: _pickle.c now compiles past Unpickler_set_memo() under MSVC 6.0 (cl.exe 12.00.8804) through Wine. The next blocker is _randommodule.c line 599, a C89 mixed-declaration defect. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` Unpickler_set_memo C89 loop-counter slice)

Date: 2026-09-12 14:08 UTC

The recorded frontier was re-probed before editing and remained true: _pickle.c compiled through Unpickler_traverse(), and the first stable blockers were the two C99 for (size_t i = ...) initializers in Unpickler_set_memo() at lines 7589 and 7637. The cleanup loop also exposed a separate SIZE_MAX undeclared diagnostic after the C99 syntax was removed.

cpython/Modules/_pickle.c — added a function-scoped size_t i; declaration and changed only the two Unpickler_set_memo() loop initializers to for (i = ...). Loop bounds, decrement behavior, cleanup, refcounting, and assignment timing are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion requiring the shared loop counter and both C89-safe loop forms.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blockers `_pickle.c(7589)` and `(7637)` C99 loop declarations, with `SIZE_MAX` also undeclared.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; the new `Unpickler_set_memo` assertion failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; both C99 loop diagnostics cleared. New first blocker is `_pickle.c(7638)`, `error C2065: 'SIZE_MAX' : undeclared identifier`; `total=16 compiled=15 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh` plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; all suites reported `ALL TESTS PASSED`.
`git -C cpython diff --check`	exit 0.
`git -C cpython diff > compat/msvc600/cpython-3.11.16-vc6-headers.patch` followed by patch whitespace check	regeneration succeeded; generated patch check exits 2 because existing diff payload contains trailing-whitespace lines, while the nested source diff check is clean.
pristine detached `v3.11.16` worktree `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; temporary verification worktree removed.

Current compile-frontier state: Unpickler_set_memo() now compiles past the C99 loop-initializer family under VC6. The next blocker is the distinct missing/unsupported SIZE_MAX definition at the cleanup loop. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` Unpickler_traverse C89 declaration-order slice)

Date: 2026-09-12

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; the nested cpython/ checkout remains detached with its existing uncommitted port edits preserved. Nothing was reset, cleaned, stashed, discarded, committed, pushed, or published. The required single focused Claude Code delegation was attempted in the existing checkout without permitting edits, but authentication failed with 401 OAuth access token has been revoked; no child changes or independent review were used.

The live forced VC6 probe was run before editing. It reached _pickle.c as the first blocker, not the older recorded _blake2 frontier: Unpickler_traverse() at line 7266 declared PyObject **memo = self->memo; after executable Py_VISIT() statements, violating VC6/C89 declaration ordering. This run therefore advanced the actual live frontier and did not touch _blake2.

cpython/Modules/_pickle.c — hoisted PyObject **memo to Unpickler_traverse()'s opening declaration group and changed the original declaration to memo = self->memo;. Assignment timing and traversal/refcount behavior are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for Unpickler_traverse() declaration ordering.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blocker `_pickle.c(7266)`, `error C2143`, mixed declaration `PyObject **memo = self->memo;`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; the new `Unpickler_traverse` assertion failed while prior assertions passed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `Unpickler_traverse()` cleared. New first blockers are `_pickle.c(7589)` C99 `for (size_t i = ...)` and `_pickle.c(7637)` C99 `for (size_t i = ...)` with `SIZE_MAX` undeclared; `total=16 compiled=15 cached=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; all regression suites reported `ALL TESTS PASSED`.
`git -C cpython diff --check && bash -n scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0.
pristine detached `v3.11.16` worktree `git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; temporary verification worktree removed.

Current compile-frontier state: _pickle.c now compiles past Unpickler_traverse() under VC6. The next narrow frontier is the distinct C99 for-initializer family in Unpickler_set_memo() at the two loop sites, with the SIZE_MAX diagnostic at the cleanup loop. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` load_readonly_buffer C89 declaration-order slice)

Date: 2026-09-12

The recorded _pickle.c frontier was re-probed before editing and remained true: load_next_buffer() compiles cleanly. The first stable blocker was load_readonly_buffer() at lines 5687–5688, where PyObject *obj = ... and PyObject *view = ... follow executable statements and violate VC6/C89 declaration ordering.

cpython/Modules/_pickle.c — hoisted PyObject *obj and PyObject *view beside Py_ssize_t len; changed the three initializers to assignments at their original execution points. No control flow or refcount ordering changed.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for load_readonly_buffer() declaration ordering.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blocker `_pickle.c(5687)`, `error C2275` for `PyObject *obj`, followed by the same declaration-order error for `view`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; the new `load_readonly_buffer` assertion failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_pickle.c` cleared `load_readonly_buffer()`. New first stable blockers are `_pickle.c(7266)` C89 declaration-order fallout for `memo`, then C99 `for`-init/declaration fallout at lines 7587 and 7635 (`SIZE_MAX` also reported). Summary remains `total=16 compiled=15 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; every regression suite reported `ALL TESTS PASSED`.
`git -C cpython diff --check && bash -n scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0.
pristine detached `v3.11.16` worktree `git apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; temporary worktree removed.

Current compile-frontier state: _pickle.c now compiles past load_readonly_buffer() under VC6. The next narrow frontier is the later _pickle.c declaration-order/C99 syntax group beginning at line 7266. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` load_next_buffer C89 declaration-order slice)

Date: 2026-09-12

The recorded frontier was re-probed before editing and remained true through _pickle_PicklerMemoProxy_copy_impl(). The first stable blocker was load_next_buffer() at _pickle.c(5662), a C99 mixed declaration after the self->buffers == NULL executable check.

cpython/Modules/_pickle.c — hoisted PickleState *st and PyObject *buf into the function declaration group; preserved both _Pickle_GetGlobalState() assignment points and the iterator assignment order.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused TDD assertion for load_next_buffer() declaration ordering.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the complete nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blocker `_pickle.c(5662)`, `error C2275`, `PyObject *buf = PyIter_Next(...)`, with same-function declaration fallout.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the assertion, before the source edit	exit 1 as required by TDD; the new `load_next_buffer` assertion failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `load_next_buffer()` cleared. New first blocker is `load_readonly_buffer()` at `_pickle.c(5687)`, C89 mixed declarations for `PyObject obj` and `PyObject view`; `total=16 compiled=15 cached=0 skipped=0`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0; every regression suite reported `ALL TESTS PASSED`.
`git -C cpython diff --check && bash -n scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0.
pristine detached `v3.11.16` worktree `git apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0; temporary worktree removed.
regenerated patch included in top-level `git diff --check`	exit 2 due trailing-whitespace diagnostics in generated patch hunks; these are diff payload whitespace lines from existing CPython changes, not source-file diagnostics.

Current compile-frontier state: _pickle.c now compiles past load_next_buffer() under VC6. The next narrow frontier is load_readonly_buffer()'s two C89 mixed declarations at lines 5687–5688. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, no Wine execution of Python, and no real Windows 98 SE execution is claimed.

Date: 2026-09-12

Latest revision (`_pickle.c` PicklerMemoProxy.copy C89 for-init slice)

Baseline remains CPython v3.11.16 at commit 41388c9cb160d0886d5ca00d2e6c8782608a4549 in the pristine tag worktree. Existing uncommitted port edits were preserved; nothing was reset, cleaned, stashed, discarded, committed, pushed, or published.

The recorded frontier state was re-probed before editing and remained true: getpath.c, _abc.c, _bisectmodule.c, _blake2 sources, and _pickle.c through Pickler_traverse() compiled cleanly. The first stable blocker was _pickle.c(4895), the C99 for (size_t i = ...) initializer in _pickle_PicklerMemoProxy_copy_impl().

cpython/Modules/_pickle.c — added size_t i; to the function declaration group and changed only the loop initializer to for (i = 0; ...); behavior and assignment timing are unchanged.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused regression assertion before the source edit, as required by TDD.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blocker `_pickle.c(4895)`, `error C2143`, C99 `for (size_t i = ...)`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; the new `PicklerMemoProxy.copy` assertion failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `_pickle.c(4895)` is cleared and the first stable blocker advances to `load_next_buffer()` at line 5662: C89 mixed declaration `PyObject *buf = PyIter_Next(...)`; `total=16 compiled=15 cached=0 skipped=0`.
shell syntax plus public/core/PathCch/getpath/stdint/frontier regression suites	exit 0; every suite reported `ALL TESTS PASSED`.
`git -C cpython diff --check` and `bash -n scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0.
pristine detached `v3.11.16` worktree `git apply --check` for regenerated patch	exit 0; temporary worktree removed.
focused Claude Code delegation	not completed: `401 OAuth access token has been revoked`; no child changes were used and no independent review is claimed.

Current compile-frontier state: _pickle_PicklerMemoProxy_copy_impl() now compiles past the C99 loop initializer under VC6. The next narrow frontier is load_next_buffer()'s C89 declaration-order defect at _pickle.c(5662). This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine execution of Python, or real Windows 98 SE execution is claimed.

Latest revision (`_pickle.c` Pickler_traverse C89 declaration slice)

Baseline remains CPython v3.11.16 (commit 41388c9 in the pristine tag worktree). All port edits remain uncommitted in the nested cpython/ checkout; nothing was reset, cleaned, stashed, discarded, committed, pushed, or published.

The recorded _pickle.c frontier was re-probed before editing. save_set() remained clean; the first stable blocker was Pickler_traverse() at the later PyMemoTable *memo = self->memo; declaration after executable Py_VISIT() statements.

cpython/Modules/_pickle.c — hoisted PyMemoTable *memo; before the Py_VISIT() statements and changed the original declaration to memo = self->memo;. No later _pickle.c defect family was changed.
scripts/vc6-probe-pythoncore-frontier.test.sh — added the focused regression assertion for Pickler_traverse() declaration order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from the nested git -C cpython diff; it applies cleanly to pristine v3.11.16.
PORT_STATUS.md — this report.

Exact command results:

Command	Result
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` before this slice	exit 2; `total=16 compiled=15 cached=0 skipped=0`; first blocker `_pickle.c(4725)`, `error C2143`, `PyMemoTable *memo = self->memo`.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after adding the focused assertion, before the source edit	exit 1 as required by TDD; the new `Pickler_traverse` assertion failed.
`bash scripts/vc6-probe-pythoncore-frontier.test.sh` after the source edit	exit 0, `ALL TESTS PASSED`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` after the source edit	exit 2; `Pickler_traverse()` is clean and the first blocker advances to `_pickle.c(4895)`, the C99 `for (size_t i = ...)` declaration in the next `_pickle.c` function; `total=16 compiled=15 cached=0 skipped=0`.
`bash -n scripts/vc6-probe-pythoncore-frontier.test.sh` plus public, core, PathCch, getpath, stdint, and frontier regression suites	exit 0; every suite reported `ALL TESTS PASSED`.
`git -C cpython diff --check`	exit 0.
pristine detached `v3.11.16` worktree `git apply --check` for the regenerated patch	exit 0; temporary worktree removed.

Current compile-frontier state: _pickle.c through Pickler_traverse() compiles cleanly under VC6. The next frontier is _pickle.c(4895), a distinct C89 declaration-order defect in a later for initializer. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine execution of Python, or real Windows 98 SE execution is claimed.

Delegation note: the focused Claude Code lane was launched with the required no-commit/no-reset scope but exited without producing a usable report or changes; implementation and verification were performed directly, with no independent review claimed.

Baseline: CPython v3.11.16 Compiler: MSVC 6.0 (cl.exe 12.00.8804), from external MSVC600 Host test environment: Linux + Wine

Files changed in this revision (`_blake2/blake2b_impl.c` ULL-literal + declaration-order + `long long`/designated-initializer slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Modules/_blake2/impl/blake2b-ref.c — two separate slices, each re-probed individually before moving to the next:
- ULL/LL literal-suffix root blocker. Inventoried every C99 ULL/LL-suffixed integer literal in the file by grep (grep -n "ULL\|[0-9]LL\b"): the 8 blake2b_IV[8] initializer constants (lines 23-26) and 4 occurrences of ~0ULL/0ULL in blake2b_set_lastnode()/blake2b_clear_lastnode()/blake2b_set_lastblock()/blake2b_clear_lastblock() (lines 48, 54, 63, 71) — 12 literals total, and no others (blake2b_impl.c itself has one more at line 163, but it sits inside a dead #ifdef HAVE_BLAKE2S branch that is never defined in this port, so the C preprocessor only needs to recognize it as a pp-number token to skip it, not evaluate its suffix, and it was left alone). VC6's C89 front end rejects the C99 ULL/LL suffix spelling outright (error C2059: syntax error : 'bad suffix on number') but does accept the Microsoft-specific i64/ui64 64-bit literal suffixes. Rather than rewriting the literals to bare ui64 (a new, unreviewed spelling choice), every literal was routed through the existing PY_LL/PY_ULL macro pair already defined in PC/pyconfig.h for exactly this compiler (#define PY_ULL(x) x##ui64 when _MSC_VER < 1300, else x##ULL) — the same macro pair Include/pyport.h already anticipates via its own #ifndef PY_LL guard and accompanying comment ("see PC/pyconfig.h for the compilers that need something other than the C99 LL/ULL suffixes"), and the same defect family/fix shape as the earlier PY_LONG_LONG routing for _abc.c. blake2b-ref.c is #included from blake2b_impl.c after #include "Python.h", so PY_ULL is already visible by the time it is preprocessed; no new include was added. Every literal's digit value is unchanged — 0x6a09e667f3bcc908ULL became PY_ULL(0x6a09e667f3bcc908), ~0ULL became ~PY_ULL(0), etc. — this is a suffix-spelling change only, and it round-trips to the identical x##ULL expansion on every non-VC6 compiler, so no behavior change on any other target.
- C89 declaration-order fallout in the same file, the next diagnostic once the literal-suffix errors cleared: blake2b_init0() declared its for loop counter as a C99 for( int i = 0; ...) init-declaration, and blake2b_init_param() declared uint8_t *p after the blake2b_init0( S ) statement and used a second C99 for( size_t i = 0; ...) init-declaration. Both were hoisted to each function's opening declaration group (int i; / uint8_t *p; size_t i;), with every assignment left at its original execution point (p = (uint8_t *)(P); still runs right after blake2b_init0(S), in the same order) — the same hoist-and-reprobe pattern already used throughout this port (_abc.c, getpath.c, pystate.c). No control flow or arithmetic changed.
cpython/Modules/_blake2/blake2b_impl.c — two more of the previously-characterized-but-unfixed defect families, each re-probed individually:
- Changed unsigned long long node_offset (the py_blake2b_new_impl() parameter, line 94) to unsigned PY_LONG_LONG node_offset. VC6 has no long long keyword (error C2632: 'long' followed by 'long' is illegal); this is not a new port-local convention — CPython's own public headers already spell 64-bit unsigned parameters exactly this way for the same reason (e.g. Include/longobject.h's PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG) and PyLong_AsUnsignedLongLong). _PyLong_UnsignedLongLong_Converter() (the Argument Clinic-generated converter call site for this parameter) takes a void * out-parameter, so the declared-type change has no call-site ABI/type-mismatch implications.
- py_blake2b_dealloc(): hoisted PyTypeObject *type into the function's opening declaration group (previously declared, C89-illegally, after the lock-free and secure-zero statements); the assignment type = Py_TYPE(self); stays at its original point, immediately before PyObject_Free(self)/Py_DECREF(type), unchanged.
- blake2b_type_spec: converted from C99 designated initializers (.name = ..., .basicsize = ..., .flags = ..., .slots = ...) to plain positional initializers in PyType_Spec's declared field order from Include/object.h (name, basicsize, itemsize, flags, slots); the struct's initializer omitted itemsize, so the positional form spells that slot 0 explicitly, matching the implicit C99 zero-fill it already had. Same defect family and fix approach as _abc_data_type_spec/_abcmodule/_bisectmodule's PyModuleDef literals earlier in this port. Field values and order are unchanged.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff (4800 lines) so the project-local compatibility patch includes this _blake2/blake2b_impl.c slice plus all prior uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 worktree exited 0; the temporary worktree was removed afterward.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 (each script individually) — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, stdint shim suite, and pythoncore frontier regression suite all passed with no regressions after this slice.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (before this revision's first edit)	exit 2 — confirmed the recorded first blocker reproduces exactly: bare `ULL` literal-suffix errors in `impl/blake2b-ref.c` (`error C2059: syntax error : 'bad suffix on number'`) as the first diagnostic for `Modules/_blake2/blake2b_impl.c`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the `PY_ULL`/`PY_LL` literal-suffix slice only)	exit 2 — every `ULL`-suffix diagnostic is gone. New first blocker: `cpython\Modules\_blake2\impl/blake2b-ref.c(143) : error C2143: syntax error : missing ';' before 'type'` (the `for( int i = ...)` C99 init-declaration in `blake2b_init0()`), with follow-on errors at lines 165/168-169 in `blake2b_init_param()`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the `blake2b-ref.c` declaration-order slice)	exit 2 — `impl/blake2b-ref.c` is now fully clean (no diagnostics reference it anymore). New first blockers, all in `Modules/_blake2/blake2b_impl.c`/its clinic header: `error C2632: 'long' followed by 'long' is illegal` at `clinic/blake2b_impl.c.h(18)`, `clinic/blake2b_impl.c.h(39)`, and `blake2b_impl.c(94)`; `error C2275: 'PyTypeObject' : illegal use of this type as an expression` at `blake2b_impl.c(397)`; and `error C2059: syntax error : '.'` at `blake2b_impl.c(412)`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the `unsigned PY_LONG_LONG` slice only)	exit 2 — all three `long long` diagnostics are gone; the `PyTypeObject`/designated-initializer diagnostics at lines 397/412 remain, confirming they are independent defects rather than parser-desync fallout.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the `py_blake2b_dealloc()`/`blake2b_type_spec` slice — final state this revision)	exit 2 — `Modules/_blake2/blake2b_impl.c` now compiles with zero errors and zero warnings; `total=6 compiled=5 cached=0 skipped=0`. The frontier advances to the next source in `pythoncore.vcxproj` order, `Modules/_blake2/blake2s_impl.c` (autogenerated from `blake2b_impl.c` per its own header comment), whose first blockers are the identical defect families mirrored into the `s`-variant files: C99 `for`-init-declarations in `impl/blake2s-ref.c` (lines 231, 275), `unsigned long long` in `clinic/blake2s_impl.c.h`(18,39)/`blake2s_impl.c`(94), a bare `ULL`-suffix literal at `blake2s_impl.c(163)` (`if (node_offset > 0xFFFFFFFFFFFFULL)`, guarded by `#ifdef HAVE_BLAKE2S` in `blake2b_impl.c` but not guarded in `blake2s_impl.c`, so it is live code there), and the same `PyTypeObject *type = Py_TYPE(self);`/designated-initializer pair at `blake2s_impl.c`(397)/(412). None of this has been fixed yet.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c`	exit 0 — still compiles cleanly after this slice.
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after this slice.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython worktree remove ../build/verify-vc6-patch-worktree --force`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree; temporary worktree removed.

Current pythoncore compile-frontier status: Modules/_blake2/blake2b_impl.c (and its #included impl/blake2b-ref.c) is fully clean under the VC6 frontier probe (0 errors, 0 warnings), advancing the frontier past _abc.c, _bisectmodule.c, blake2module.c, and now blake2b_impl.c. The frontier has moved on to Modules/_blake2/blake2s_impl.c, whose first blocker set is the same defect families just fixed here, mirrored into the autogenerated s-variant sources — plus one new wrinkle: the 0xFFFFFFFFFFFFULL node-offset overflow check that sits inside a dead #ifdef HAVE_BLAKE2S branch in blake2b_impl.c (and so never needed fixing there) is not dead code in blake2s_impl.c, so its ULL suffix will need the same PY_ULL() treatment as a live diagnostic this time. Recommended next slice: mirror this revision's three sub-slices onto the s-variant files in the same order (literal suffixes in impl/blake2s-ref.c plus the live blake2s_impl.c(163) literal first, then blake2s-ref.c's C89 declaration-order fallout, then unsigned PY_LONG_LONG/PyTypeObject/designated-initializer in blake2s_impl.c/its clinic header), re-probing after each sub-slice as done here.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`compat/msvc600/stdint.h` shim + `_blake2/blake2module.c` slice)

All still uncommitted; nothing in this list has been pushed anywhere.

compat/msvc600/stdint.h — new VC6-scoped project-local compatibility header providing the missing C99 <stdint.h> that cpython/Modules/_blake2/impl/blake2.h and blake2-impl.h #include. Evidence before adding it: grepped every fixed-width-integer identifier (u?int(8|16|32|64)_t, u?intptr_t, u?int_least*_t, u?int_fast*_t, size_t) across the entire Modules/_blake2/ tree (both impl headers/sources and the blake2b_impl.c/blake2s_impl.c/clinic wrappers). The only fixed-width types actually used anywhere in that tree are uint8_t, uint32_t, and uint64_t (in load32/64/48, store32/64/48, rotl32/64, rotr32/64, and the reference block-compression loops); no int8_t/int16_t/int32_t/int64_t or intptr_t/uintptr_t appear at all. size_t is also used but is unaffected — it already comes from <stddef.h>, which VC6 has natively. Design: rather than re-declaring these three typedefs a second time under a second include guard, stdint.h forwards to the already-existing, already-verified compat/msvc600/inttypes.h (added in an earlier revision so CPython's own Include/pyport.h, which does #include <inttypes.h>, would compile) via #include "inttypes.h". inttypes.h's own include guard makes this forwarding idempotent regardless of which of the two headers a given translation unit reaches first, so a TU that ends up pulling in both Python.h (→ pyport.h → <inttypes.h>) and blake2.h (→ <stdint.h>) cannot hit a duplicate-typedef error. Width assumptions (unchanged, already relied on by inttypes.h): uint8_t = unsigned char (1 byte), uint32_t = unsigned long (4 bytes on Win32/ILP32), uint64_t = unsigned __int64 (VC6's non-standard 64-bit extension, 8 bytes) — verified sufficient by a compile-time fixture (below) using typedef char check[(sizeof(uint32_t)==4) ? 1 : -1];-style width assertions, since VC6 has no static_assert.
scripts/fixtures/vc6_stdint_smoke.c — new focused compile fixture: includes both <stdint.h> and <inttypes.h> in the same translation unit (reproducing the Python.h + blake2.h coexistence case), asserts sizeof(uint8_t)==1/sizeof(uint32_t)==4/sizeof(uint64_t)==8 at compile time, and exercises load32/load64/rotl32/rotl64 in the same shape blake2-impl.h uses.
scripts/vc6-probe-stdint.test.sh — new regression test for the shim and fixture under the VC6 probe, modeled directly on the existing scripts/vc6-probe-pathcch.test.sh (skips, not fails, when Wine/MSVC600 are unavailable).
cpython/Modules/_blake2/blake2module.c — with the <stdint.h> blocker gone, the file advanced to two blockers from defect families already fixed elsewhere in this port: (1) blake2_exec() declared PyObject *d = st->blake2b_type->tp_dict; after preceding statements (C89 mixed-declaration; VC6 requires declarations before statements) — hoisted PyObject *d; into the function's opening declaration group and changed the first assignment to plain d = ..., leaving the second assignment (d = st->blake2s_type->tp_dict;) unchanged since d was already in scope there; (2) the blake2_module PyModuleDef struct literal mixed a positional PyModuleDef_HEAD_INIT/"_blake2" prefix with C99 designated initializers (.m_doc = ... etc.) for the rest — converted to plain positional initializers in Include/moduleobject.h's declared field order (m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free), the same defect family and fix already used in _abc.c and _bisectmodule.c. Field values and order are unchanged — this is a spelling change only, not a behavior change.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff (4651 lines) so the project-local compatibility patch includes this stdint.h/blake2module.c slice plus all prior uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 worktree exited 0; the temporary worktree was removed afterward.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 (each script individually) — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, new stdint shim suite, and pythoncore frontier regression suite all passed with no regressions after this slice.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (before this slice)	exit 2 — confirmed the recorded first blocker reproduces exactly: `cpython\Modules\_blake2\impl/blake2.h(18) : fatal error C1083: Cannot open include file: 'stdint.h': No such file or directory`. Summary: `total=4 compiled=3 cached=0 skipped=0`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after adding `compat/msvc600/stdint.h` only, before the `blake2module.c` source edits)	exit 2 — the missing-`stdint.h` fatal error is gone; new first blocker is `cpython\Modules\_blake2\blake2module.c(98) : error C2275: 'PyObject' : illegal use of this type as an expression` (C89 mixed-declaration) immediately followed by the `.m_doc = ...` designated-initializer `error C2059: syntax error : '.'` at line 145.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the `blake2module.c` slice)	exit 2 — `Modules/_blake2/blake2module.c` now compiles with zero errors and zero warnings. The frontier advances to the next source in `pythoncore.vcxproj` order, `Modules/_blake2/blake2b_impl.c`, whose new first blockers are a different defect family: bare `0ULL`/`64ULL`-style integer-literal suffixes in `Modules/_blake2/impl/blake2b-ref.c` (`error C2059: syntax error : 'bad suffix on number'` — VC6's C89 front end does not accept the C99 `ULL`/`LL` integer-constant suffixes at all, only `UL`/`L`/`U`), C99 mixed-declaration/`for`-init-declaration fallout in the same file, `unsigned long long` in `clinic/blake2b_impl.c.h` and `blake2b_impl.c` itself (the same `long long`-keyword gap already routed through `PY_LONG_LONG` elsewhere in this port), and a `PyTypeObject *type = ...` C89 mixed-declaration plus a `.` designated-initializer in `blake2b_impl.c`. None of this has been fixed yet. Summary: `total=5 compiled=4 cached=0 skipped=0`.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c`	exit 0 — still compiles cleanly after this slice.
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after this slice.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython worktree remove ../build/verify-vc6-patch-worktree --force`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree; temporary worktree removed.

Current pythoncore compile-frontier status: Modules/_blake2/blake2module.c is fully clean under the VC6 frontier probe (0 errors, 0 warnings), advancing the frontier past _abc.c, _bisectmodule.c, and now blake2module.c. The frontier has moved on to Modules/_blake2/blake2b_impl.c (via its #included impl/blake2b-ref.c), whose first blocker is a new defect family for this port: VC6's C89 front end rejects the C99 ULL/LL unsigned-long-long integer-literal suffixes used throughout the BLAKE2 reference constants and IV tables. This is distinct from the already-solved long long keyword gap (PY_LONG_LONG) — it is about literal-suffix spelling, and will need either rewriting the affected literals (e.g. 0x6A09E667F3BCC908ULL → a PY_LONG_LONG-safe spelling, likely via a cast or an _LL/ui64-suffix substitution valid under VC6) or a targeted macro, plus the follow-on C89 declaration-order, long long-keyword, and designated-initializer fixes already characterized above in blake2b_impl.c and its clinic header. Recommended next slice: Modules/_blake2/impl/blake2b-ref.c's integer-literal suffixes first (it is the root blocker blake2b_impl.c #includes), then re-probe before touching blake2b_impl.c itself.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`_bisectmodule.c` designated-initializer slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Modules/_bisectmodule.c — converted the _bisectmodule PyModuleDef struct literal from C99 designated initializers (.m_name = ..., .m_size = ..., etc.) to plain positional initializers in the struct's declared field order (m_base, m_name, m_doc, m_size, m_methods, m_slots, m_traverse, m_clear, m_free, per Include/moduleobject.h). This is the same defect family and same fix approach already used twice in _abc.c (error C2059: syntax error : '.'; VC6 has no C99 designated-initializer support). The struct had no m_traverse initializer in the original, so the corresponding positional slot is NULL. Field values and order are otherwise unchanged — this is a spelling change only, not a behavior change. No declaration-order (C89 mixed-declaration) errors followed this fix; the file compiles clean end-to-end on the first re-probe.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff (4609 lines) so the project-local compatibility patch includes this _bisectmodule.c slice plus all prior uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 worktree exited 0; the temporary worktree was removed afterward.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 (each script individually) — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed with no regressions after this slice.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (before this slice)	exit 2 — confirmed the recorded first blocker reproduces exactly: `cpython\Modules\_bisectmodule.c(329) : error C2059: syntax error : '.'` at `.m_name = "_bisect",` in the `_bisectmodule` `PyModuleDef` initializer.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after this slice)	exit 2 — `Modules/_bisectmodule.c` now compiles with zero errors and zero warnings (only the source-filename echo from `cl.exe`, same as a clean compile). The frontier advances to the next source in `pythoncore.vcxproj` order, `Modules/_blake2/blake2module.c`, whose new first blocker is `cpython\Modules\_blake2\impl/blake2.h(18) : fatal error C1083: Cannot open include file: 'stdint.h': No such file or directory` — a missing modern-C/SDK standard header, a different defect family from designated initializers or C89 declaration ordering, and not yet addressed here. Summary: `total=4 compiled=3 cached=0 skipped=0`.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c`	exit 0 — still compiles cleanly after this slice.
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after this slice.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython worktree remove ../build/verify-vc6-patch-worktree --force`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree; temporary worktree removed.

Current pythoncore compile-frontier status: Modules/_bisectmodule.c is fully clean under the VC6 frontier probe (0 errors, 0 warnings), advancing the frontier past both _abc.c and _bisectmodule.c. The frontier has moved on to Modules/_blake2/blake2module.c, whose first blocker is a missing <stdint.h> (needed by Modules/_blake2/impl/blake2.h for fixed-width integer types like uint32_t/uint64_t). This is a new defect family — a missing standard/SDK header, not a source-level C89/C99 compatibility issue — and will likely need either a project-local stdint.h compatibility shim (similar in spirit to the existing compat/msvc600/pathcch.h shim) or a decision to exclude/stub the _blake2 module for this port, rather than a source-hoist slice. The recommended next step is to characterize the actual uint32_t/uint64_t/etc. usage in Modules/_blake2/impl/*.h before choosing between those two approaches.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`_abc.c` C89 declaration-hoist + designated-initializer slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Modules/_abc.c — advanced the _abc.c frontier past its full body with a sequence of small, individually re-probed slices:
- abc_data_dealloc(): hoisted PyTypeObject *tp before the PyObject_GC_UnTrack(self) statement (the exact line-67 blocker recorded at the start of this revision).
- _abc_data_type_spec and the _abcmodule PyModuleDef: converted from C99 designated initializers (.name = ..., .m_name = ..., etc.) to plain positional initializers in declared field order. VC6 has no C99 designated-initializer support at all (error C2059: syntax error : '.'); this is a different defect family from declaration-hoisting, so it is called out separately here. Field values and order are unchanged — this is a spelling change only, not a behavior change.
- _in_weak_set(), _add_to_weak_set(), _abc__get_dump(), compute_abstract_methods() (both for loops, including replacing their C99 for (Py_ssize_t pos = 0; ...) init-declarations with a function-scoped pos and hoisting per-iteration locals to the top of each loop body), set_collection_flag_recursive(), _abc__abc_register_impl(), _abc__abc_instancecheck_impl(), _abc__abc_subclasscheck_impl() (including its inner for loop over subclasses), and subclasscheck_check_registry() (including its inner for loop over the registry snapshot): hoisted all locals into each function's or block's opening declaration group, preserving every assignment at its original execution point (after argument validation, inside the same if/for/while branch, etc.). No control flow, lock/refcount ordering, or error-path behavior was changed anywhere in this slice.
- The previously reported "generated clinic/_abc.c.h struct-redefinition conflict around line 583" was characterized while fixing _abc__abc_instancecheck_impl() (whose opening declaration group sat at old line 583): it was parser-desync fallout from the preceding unfixed declaration-hoist errors, not a real redefinition. clinic/_abc.c.h itself is unmodified and is only 163 lines long; there is no struct redefinition in it. This matches the caveat already recorded about that hypothesis.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff (4583 lines) so the project-local compatibility patch includes this _abc.c slice plus all prior uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 worktree exited 0; the temporary worktree was removed afterward.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 (each script individually) — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed with no regressions after this slice.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (before this slice)	exit 2 — confirmed the recorded first blocker reproduces exactly: `cpython\Modules\_abc.c(67) : error C2275: 'PyTypeObject' : illegal use of this type as an expression` at `PyTypeObject *tp = Py_TYPE(self);` in `abc_data_dealloc()`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after each incremental slice, ~10 live re-probes)	exit 2 each time until the final one — the first diagnostic advanced monotonically through `_abc.c`: line 67 (`abc_data_dealloc`) → line 109 designated-initializer `error C2059` (`_abc_data_type_spec`) → line 138 (`_in_weak_set`) → line 203 (`_add_to_weak_set`) → line 291 (`_abc__get_dump`) → line 311 (`compute_abstract_methods`) → line 507/512 (`set_collection_flag_recursive`) → line 537 (`_abc__abc_register_impl`) → line 612 (`_abc__abc_instancecheck_impl`) → line 695 (`_abc__abc_subclasscheck_impl`) → line 849 (`subclasscheck_check_registry`). Each slice was verified against the live VC6 frontier before moving to the next.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after the final `_abc.c` slice)	exit 2 — `Modules/_abc.c` now compiles with zero errors and zero warnings; `total=3 compiled=2 cached=0 skipped=0`. The frontier advances to the next source in `pythoncore.vcxproj` order, `Modules/_bisectmodule.c`, whose new first blocker is `cpython\Modules\_bisectmodule.c(329) : error C2059: syntax error : '.'` — the same C99 designated-initializer defect family just fixed twice in `_abc.c`, not yet fixed here.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c`	exit 0 — still compiles cleanly after this slice.
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after this slice.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch && git -C cpython worktree remove ../build/verify-vc6-patch-worktree --force`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree; temporary worktree removed.

Current pythoncore compile-frontier status: Modules/_abc.c is fully clean under the VC6 frontier probe (0 errors, 0 warnings). The frontier has moved on to Modules/_bisectmodule.c, whose first blocker is a C99 designated-initializer struct literal (error C2059: syntax error : '.' at line 329), the same defect family already fixed twice above (_abc_data_type_spec, _abcmodule). The recommended next slice is _bisectmodule.c's designated initializer(s), followed by whatever C89 declaration-order issues follow in that file, using the same per-function hoist-and-reprobe approach used throughout this revision.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`_abc.c` frontier: `pycore_moduleobject.h` declaration-hoist + `long long` spelling)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Include/internal/pycore_moduleobject.h — hoisted _PyModule_GetDict()'s PyObject *dict declaration into the function's opening declaration group (C89/VC6 requires declarations before statements; the prior form declared dict after the assert(PyModule_Check(mod)); statement). The assignment stays at the original point, and the following assert(dict != NULL);/return are unchanged.
cpython/Modules/_abc.c — changed the two unsigned long long struct field declarations (_abcmodule_state.abc_invalidation_counter, _abc_data._abc_negative_cache_version) to unsigned PY_LONG_LONG. VC6 has no long long keyword at all (error C2632: 'long' followed by 'long' is illegal); CPython's own PC/pyconfig.h already defines PY_LONG_LONG to fall back to __int64 for _MSC_VER < 1300 (VC6) for exactly this reason. This routes through that existing, already-correct CPython compatibility macro instead of adding a new shim; no other files in the current frontier use the bare long long spelling.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff so the project-local compatibility patch includes this slice plus all prior uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 (each script individually) — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed with no regressions after this slice.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (before this slice)	exit 2 — first blocker `cpython\Include\internal\pycore_moduleobject.h(33) : error C2143: syntax error : missing ';' before 'type'` at `PyObject dict = ((PyModuleObject )mod) -> md_dict;`, cascading into spurious `dict`-undeclared fallout plus `pycore_gc.h(15) : error C2061: syntax error : identifier 'uintptr_t'` and further undefined-struct fallout through `pycore_interp.h`, `pycore_global_objects.h`, `pycore_runtime.h`, and `pycore_object.h`, then `_abc.c` fallout until `fatal error C1003: error count exceeds 100`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after `pycore_moduleobject.h` hoist only)	exit 2 — confirms the hoist was the true root cause: every `pycore_gc.h`/`pycore_interp.h`/`pycore_global_objects.h`/`pycore_runtime.h`/`pycore_object.h` diagnostic is gone (those headers were never actually broken; VC6's error recovery from the single C89 syntax error had desynced parsing for the rest of the translation unit). New first blocker is `cpython\Modules\_abc.c(22) : error C2632: 'long' followed by 'long' is illegal` at `unsigned long long abc_invalidation_counter;`.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh` (after both fixes)	exit 2 — `_abc.c`'s `long long` blocker is gone. New first blocker is `cpython\Modules\_abc.c(67) : error C2275: 'PyTypeObject' : illegal use of this type as an expression` (a C89 mixed-declaration pattern, same family as already fixed repeatedly in `pystate.c`/`pylifecycle.c`/`getpath.c`), followed by many more declaration-order and declaration-after-statement errors throughout the rest of `_abc.c`'s ~35 functions until `fatal error C1003: error count exceeds 100` at line 784. Summary: `total=2 compiled=1 cached=0 skipped=0`.
`bash scripts/vc6-probe-core.sh cpython/Modules/main.c`	exit 0 — still compiles cleanly after this slice.
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after this slice.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree.

Current pythoncore compile-frontier status: the frontier has advanced past the pycore_moduleobject.h/GC-header cascade and past _abc.c's long long blocker. Modules/_abc.c is now the active frontier file; the next blocker is a large set of C89 declaration-order violations spread across most of its functions (starting at line 67), plus at least one apparent struct-redefinition conflict with the Argument Clinic-generated clinic/_abc.c.h at line 583 that has not yet been individually characterized. This will need a multi-slice declaration-hoist pass through _abc.c, similar in shape to the pystate.c slices recorded below, rather than a single edit.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (VC6 frontier `/D` string define transport)

All still uncommitted; nothing in this list has been pushed anywhere.

scripts/vc6-probe-pythoncore-frontier.sh — moved live VC6 compile arguments into per-object response files so quoted /D string literals no longer traverse wine cmd /c as inline command text. quote_define_for_cmd() now doubles define-owned backslashes before protecting literal quotes, so VPATH="..\\.." reaches CL preprocessing as the C string literal "..\\.."; empty-string defines such as PYDEBUGEXT="" are preserved. Added render_compile_command_for_test() as a safe no-Wine regression helper for define rendering.
scripts/vc6-probe-pythoncore-frontier.test.sh — added a list-only/no-toolchain assertion that checks rendered per-file string defines for VPATH, PYDEBUGEXT, and PLATLIBDIR before the optional live Wine/VC6 run.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command Result

bash -n scripts/vc6-probe.test.sh scripts/vc6-probe-core.test.sh scripts/vc6-probe-pathcch.test.sh scripts/generate-getpath-frozen.test.sh scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-pythoncore-frontier.sh scripts/generate-getpath-frozen.sh scripts/vc6-probe-minlink.sh scripts/vc6-probe-core.sh scripts/vc6-probe.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh exit 0 — shell syntax plus public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed.

VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh exit 2 — Modules/getpath.c now compiles cleanly under the forced frontier. The frontier advances to Modules/_abc.c; first exact blocker is cpython\\Include\\internal\\pycore_moduleobject.h(33) : error C2143: syntax error : missing ';' before 'type', followed by dict undeclared fallout, missing/undefined GC internals beginning with pycore_gc.h(15) : error C2061: syntax error : identifier 'uintptr_t', and then _abc.c VC6/C89/modern-C fallout until fatal error C1003: error count exceeds 100. Summary: total=2 compiled=1 cached=0 skipped=0.

Current pythoncore compile-frontier status: the quoted macro transport blocker is resolved in the harness, and the frontier has advanced past Modules/getpath.c. The next actionable blocker is now in shared internal headers reached while compiling Modules/_abc.c, starting with C89 declaration ordering in pycore_moduleobject.h and missing/unsupported GC typedef structure (uintptr_t / PyGC_Head) fallout.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`getpath.c` _PyConfig_InitPathConfig C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Modules/getpath.c — advanced _PyConfig_InitPathConfig() past the first main-body VC6/C89 declaration-order blocker by hoisting active locals (configDict, dict, co, Windows-only winreg, and r) into the function opening declaration group. Assignments remain at their original execution points after _PyPathConfig_ReadGlobal(), early status/compute_path_config return, and GIL check; refcount cleanup, winreg fallback handling, code evaluation, _PyConfig_FromDict(), and return statuses are unchanged. Disabled #if 0 debug locals were left untouched.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff so the compatibility patch includes this _PyConfig_InitPathConfig() declaration-hoist slice plus prior uncommitted compatibility edits.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2 — `_PyConfig_InitPathConfig()` now gets past the prior line-887 `PyObject *configDict = _PyConfig_AsDict(config);` blocker, plus the follow-on `dict`, `co`, Windows `winreg`, and `r` declaration-order blockers. New exact first blocker is `build\generated\cpython\Modules\getpath.c(956) : error C2001: newline in constant` at `!decode_to_dict(dict, "VPATH", VPATH)`, followed by adjacent newline-in-constant diagnostics for `PLATLIBDIR`, `PYDEBUGEXT`, and `PYWINVER`, then parse fallout. Summary: `total=1 compiled=0 cached=0 skipped=0`.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree.

Current pythoncore compile-frontier status: the requested _PyConfig_InitPathConfig() declaration-order slice is complete and verified. The frontier still starts at Modules/getpath.c, but the next blocker has advanced from C89 declarations to quoted macro/value handling in the initial-value dictionary expression.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in this revision (`getpath.c` first VC6/C89 helper slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Modules/getpath.c — advanced the first Modules/getpath.c pythoncore frontier slice by moving early helper declarations to C89/VC6-safe declaration groups while preserving assignment timing after argument parsing and other checks. Covered getpath_abspath(), getpath_basename(), getpath_dirname(), getpath_hassuffix(), Windows file-attribute helpers (isdir/isfile/isxfile), getpath_joinpath(), getpath_readlines(), funcs_to_dict(), decode_to_dict(), env_to_dict(), and winmodule_to_dict().
cpython/Modules/getpath.c — added a narrow VC6/old-SDK fallback for missing INVALID_FILE_ATTRIBUTES, guarded as defined(_MSC_VER) && _MSC_VER < 1300 && !defined(INVALID_FILE_ATTRIBUTES) under MS_WINDOWS after including <windows.h>.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff so the project-local compatibility patch includes this getpath.c slice plus prior uncommitted compatibility edits.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 — public probe suite, core probe suite, PathCch shim suite, getpath frozen-header generator suite, and pythoncore frontier regression suite all passed.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2 — `Modules/getpath.c` gets past the prior line-66 `Py_ssize_t len` blocker, the immediate helper declaration-order blockers, and the old-SDK `INVALID_FILE_ATTRIBUTES` blocker. New exact first blocker is `build\\generated\\cpython\\Modules\\getpath.c(887) : error C2275: 'PyObject' : illegal use of this type as an expression` at `PyObject *configDict = _PyConfig_AsDict(config);` in `_PyConfig_InitPathConfig()`, followed by the same function's later C89 declaration-order fallout. Summary: `total=1 compiled=0 cached=0 skipped=0`.
`git -C cpython worktree add --detach ../build/verify-vc6-patch-worktree v3.11.16 && git -C build/verify-vc6-patch-worktree apply --check ../../compat/msvc600/cpython-3.11.16-vc6-headers.patch`	exit 0 — regenerated compatibility patch applies cleanly to a pristine detached `v3.11.16` worktree.

Current pythoncore compile-frontier status: the first bounded getpath.c helper declaration-order/old-SDK slice is complete and verified. The frontier still starts at Modules/getpath.c, but the next blocker has advanced into _PyConfig_InitPathConfig()'s main path-calculation body.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in this revision (generated `getpath.h` provisioning)

All still uncommitted; nothing in this list has been pushed anywhere.

scripts/generate-getpath-frozen.sh — new reproducible project-local generation step for Python/frozen_modules/getpath.h. It invokes CPython's documented Programs/_freeze_module.py getpath Modules/getpath.py ... path with host python3 and writes only to ignored build/generated/cpython/Python/frozen_modules/getpath.h.
scripts/generate-getpath-frozen.test.sh — new regression coverage for the generated path and header format: verifies the _freeze_module.py banner, _Py_M__getpath symbol, 16-byte line formatting, unmarshaled <frozen getpath> code object, and byte-for-byte equality with a direct Programs/_freeze_module.py invocation.
scripts/vc6-probe-pythoncore-frontier.sh — now provisions the generated getpath header before live VC6 compilation and compiles Modules/getpath.c from an ignored generated cpython-shaped source copy so its relative ../Python/frozen_modules/getpath.h include resolves without tracking generated output.
scripts/vc6-probe-pythoncore-frontier.test.sh — live integration check now rejects a stale missing-getpath.h blocker and verifies the frontier harness created the ignored generated header.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command Result

chmod +x scripts/generate-getpath-frozen.sh scripts/generate-getpath-frozen.test.sh scripts/vc6-probe-pythoncore-frontier.sh && bash -n scripts/generate-getpath-frozen.sh scripts/generate-getpath-frozen.test.sh scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh exit 0 — generator format/path regression passed and frontier regression passed, including live provisioning of build/generated/cpython/Python/frozen_modules/getpath.h.

VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh exit 2 — Modules/getpath.c now gets past both <pathcch.h> and the generated ../Python/frozen_modules/getpath.h include. It stops at the next honest VC6/C89 compile blocker: mixed declarations in getpath.c, first diagnostic build\\generated\\cpython\\Modules\\getpath.c(66) : error C2275: 'Py_ssize_t' : illegal use of this type as an expression, followed by more declaration-order errors and INVALID_FILE_ATTRIBUTES not being declared before the compiler reaches its 100-error cap. Summary: total=1 compiled=0 cached=0 skipped=0.

Current pythoncore compile-frontier status: generated frozen getpath.h is now reproducibly provisioned from CPython source into ignored build output and integrated into the frontier harness. The current first blocker remains Modules/getpath.c, now at VC6/C89 declaration-order and old-SDK constant compatibility work rather than missing generated input.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (VC6 `PathCchFindExtension` shim)

All still uncommitted; nothing in this list has been pushed anywhere.

compat/msvc600/pathcch.h — new VC6-scoped project-local compatibility header that implements only PathCchFindExtension(PCWSTR, size_t, PCWSTR *) for the existing Modules/getpath.c use. It scans a null-terminated wide path within cchPath, returns the last . after the last \\, /, or : separator, returns the terminating NUL when no extension is present, and returns E_INVALIDARG for null arguments, zero cchPath, or a too-small count with no NUL.
scripts/fixtures/vc6_pathcch_smoke.c — focused compile fixture covering .exe, no extension, a dot in a directory name, dotfiles, trailing directory separators, multiple suffixes, and invalid/too-small arguments.
scripts/vc6-probe-pathcch.test.sh — new regression test for the shim and fixture under the VC6 probe when Wine/MSVC600 are available.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`chmod +x scripts/vc6-probe-pathcch.test.sh && bash -n scripts/vc6-probe-pathcch.test.sh scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-minlink.sh scripts/vc6-probe-core.sh scripts/vc6-probe.sh`	exit 0
`bash scripts/vc6-probe-pathcch.test.sh`	exit 0, `ALL TESTS PASSED` — 4/4 checks `ok`; the smoke fixture compiles under VC6 and no longer hits missing `pathcch.h`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 — public probe suite, core probe suite, pathcch smoke suite, and frontier regression suite all passed.
`VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2 — `Modules/getpath.c` now gets past `<pathcch.h>` and stops at the next honest blocker: `cpython\\Modules\\getpath.c(22) : fatal error C1083: Cannot open include file: '../Python/frozen_modules/getpath.h': No such file or directory`. Summary: `total=1 compiled=0 cached=0 skipped=0`.

Current pythoncore compile-frontier status: the narrow PathCchFindExtension compatibility needed by Modules/getpath.c is implemented and verified under VC6 compile probes. The next blocker in full project order is the missing generated/frozen header Python/frozen_modules/getpath.h required by Modules/getpath.c; this is separate from the PathCch API gap. No CompareStringOrdinal blocker has been reached yet.

Caveat: this is still compile-probe work only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (source-list-driven pythoncore compile frontier)

All still uncommitted; nothing in this list has been pushed anywhere.

scripts/vc6-probe-pythoncore-frontier.sh — new project-local pythoncore compile-frontier harness. It parses cpython/PCbuild/pythoncore.vcxproj's 198 <ClCompile> entries, normalizes Windows-style paths to project-local cpython/... paths, compiles supported sources incrementally, preserves common/per-file defines, reports external/generated sources, and stops on the first VC6 front-end blocker with cl.exe's real status.
scripts/vc6-probe-pythoncore-frontier.test.sh — new regression test covering source-list parsing, path normalization, per-file define preservation, unsupported/generated/external reporting, and a bounded live first-source VC6 run when Wine/MSVC600 are present.
PORT_STATUS.md — that revision.

Command results (previous revision):

Command	Result
`for f in scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh scripts/vc6-probe-minlink.sh scripts/vc6-probe-core.sh; do bash -n "$f"
`bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0, `ALL TESTS PASSED` — 12/12 checks `ok`
`bash scripts/vc6-probe-pythoncore-frontier.sh`	exit 2 — generated the source list, began with `cpython/Modules/getpath.c`, preserved its per-file defines, invoked VC6 `cl.exe`, and stopped truthfully at the first blocker: missing `pathcch.h` at `Modules/getpath.c(14)`.
`bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh`	exit 0 — public probe suite, core probe suite, and new frontier suite all passed.
`bash scripts/vc6-probe-minlink.sh`	exit 96 — unchanged minimal link-frontier behavior: all four selected translation units compile, then `LINK.EXE` fails with `fatal error LNK1120: 267 unresolved externals`.

Previous pythoncore compile-frontier status: source-list-driven frontier infrastructure was implemented and verified. The first actionable VC6 compile blocker in full project order was Modules/getpath.c requiring pathcch.h, a modern Windows SDK header not present in the VC6/MSVC600 include set.

Caveat: this was a compile-frontier harness only. No full pythoncore.dll/python.exe build, no successful link, no Wine launch, and no Windows 98 runtime execution was claimed.

Files changed in previous revision (minimal VC6 link-frontier probe)

All still uncommitted; nothing in this list has been pushed anywhere.

scripts/vc6-probe-minlink.sh — new project-local link-frontier harness. It reuses the existing Wine/MSVC600 helpers, compiles Programs/python.c plus the three currently clean core translation units (Modules/main.c, Python/pylifecycle.c, and Python/pystate.c) with pythoncore-style core/shared defines, then invokes VC6 LINK.EXE for a minimal python-min.exe attempt. This is intentionally not a full pythoncore.vcxproj build; pythoncore.vcxproj lists 198 C sources (without externals disabled: plus zlib-conditioned entries), while python.vcxproj only contributes Programs/python.c and references the core project.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe-minlink.sh`	exit 96 — all four frontier translation units compile under VC6, then `LINK.EXE` runs and fails truthfully with `fatal error LNK1120: 267 unresolved externals`. First unresolved symbols include `__PyPathConfig_ComputeSysPath0` / `__PyPathConfig_UpdateGlobal` (`Python/pathconfig.c`), `__Py_Dealloc` (`Objects/object.c`), `_PyErr_Print` (`Python/pythonrun.c`), and `PyStatus_Ok` (`Python/initconfig.c`).
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — existing core compile-probe regression checks still pass after adding the link-frontier script

Current minimal-link status: the first post-core-probe link milestone is now implemented as a reproducible harness that reaches the VC6 linker. A successful link is not feasible from only the already-clean TUs: the exact blocker is the expected unresolved-symbol frontier caused by not yet compiling the rest of pythoncore.vcxproj's source graph. Recommended next artifact is a source-list-driven VC6 pythoncore compile frontier (generate/consume the pythoncore.vcxproj <ClCompile> list, with per-file defines such as getpath.c and sysmodule.c handled explicitly) that compiles additional core objects one at a time before attempting a real pythoncore/python.exe link.

Caveat: this is a link-frontier probe only. No pythoncore.dll/full python.exe build, no Wine launch, and no Windows 98 runtime execution is claimed.

Files changed in previous revision (`pystate.c` final tail helper C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — _Py_GetConfig() now declares PyThreadState *tstate in the function opening declaration group while preserving the assert(PyGILState_Check()) before assigning tstate = _PyThreadState_GET(). push_chunk() now declares _PyStackChunk *new and PyObject **res in its opening declaration group while preserving the allocation-size loop, allocate_chunk(...) assignment point, chunk linking/top/limit updates, root-chunk offset, and returned stack pointer. _PyThreadState_PopFrame() now declares PyObject **base in the function opening declaration group while preserving the datastack assertion before assigning base = (PyObject **)frame, plus the chunk-pop and top-reset paths. _PyThreadState_BumpFramePointerSlow()'s inner block declaration was not changed.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff (3703 lines); includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` compiles cleanly end-to-end (compile-only)
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the final tail-helper declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 0 — gets past the prior line 3405 (`PyThreadState tstate = _PyThreadState_GET();`) blocker in `_Py_GetConfig()`, the `push_chunk()` declaration-order blockers at line 3418 (`_PyStackChunk new = allocate_chunk(...)`) and line 3431 (`PyObject res = &new->data[...]`), and the follow-on line 3460 (`PyObject base = (PyObject **)frame;`) blocker in `_PyThreadState_PopFrame()`. No next C89 declaration blocker is currently exposed by the `pystate.c` compile probe; the only diagnostic left in this probe output is the pre-existing line 3361 warning (`warning C4550: expression evaluates to a function which is missing an argument list`).
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` PyGILState_Check/Ensure C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists PyGILState_Check()'s PyThreadState *tstate into the function opening declaration group while preserving the early check_enabled and TSS-created returns before assigning tstate = _PyRuntimeGILState_GetThreadState(gilstate). PyGILState_Ensure() now declares PyThreadState *tcur and int current in the opening declaration group, keeps tcur = PyThread_tss_get(...) after the initialization assertions, and leaves the new/current thread-state branches, restore/save ordering, counter update, and return value unchanged.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `PyGILState_Check()`/`PyGILState_Ensure()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior line 2886 (`error C2275: 'PyThreadState' : illegal use of this type as an expression`) blocker at `PyThreadState tstate = _PyRuntimeGILState_GetThreadState(gilstate);` in `PyGILState_Check()` and the adjacent `PyGILState_Ensure()` declaration-order fallout. New exact first blocker is line 3052 (`error C2059: syntax error : '{'`) at `data = (_PyCrossInterpreterData){0};` in `_PyObject_GetCrossInterpreterData()`, followed by line 3057 `crossinterpdatafunc getdata = _lookup_getdata(obj);`, line 3062 `int res = getdata(obj, data);`, and later cross-interpreter-data helper declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` frame access and async-exception C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists PyThreadState_GetFrame()'s _PyInterpreterFrame *f and PyFrameObject *frame declarations into the function's opening declaration group while preserving the f = tstate->cframe->current_frame assignment immediately after the assert and the frame = _PyFrame_GetFrameObject(f) assignment after the NULL check. PyThreadState_SetAsyncExc() now declares PyThreadState *tstate in the function opening group and uses for (tstate = ...; ...); its loop body declares PyObject *old_exc before the skip check and assigns it at the original point before the async exception replacement, preserving head-lock traversal, skip behavior, unlock-before-decref, signal, and return paths.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 32/32 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the frame access and async-exception declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `PyThreadState_GetFrame()` blockers at line 2457 (`_PyInterpreterFrame f = tstate->cframe->current_frame;`) and line 2464 (`PyFrameObject frame = _PyFrame_GetFrameObject(f);`), plus `PyThreadState_SetAsyncExc()`'s C99 `for (PyThreadState tstate = ...)` initializer and post-`if` `PyObject old_exc` loop-body declaration. New exact first blocker is line 2576 (`error C2275: 'PyObject' : illegal use of this type as an expression`) at `PyObject *result = PyDict_New();` in `_PyThread_CurrentFrames()`, followed by line 2582 (`int gc_was_enabled = PyGC_Disable();`) and later declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` thread-state deletion helpers C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists the thread-state deletion helper locals needed by VC6/C89: tstate_delete_common() now declares PyInterpreterState *interp, _PyRuntimeState *runtime, and _PyStackChunk *chunk in the opening declaration group while assigning them at their original post-ensure/post-TSS points; _PyThreadState_DeleteCurrent() declares struct _gilstate_runtime_state *gilstate before _Py_EnsureTstateNotNULL() and assigns it immediately after; _PyThreadState_DeleteExcept() declares PyThreadState *list, p, and next before HEAD_LOCK(runtime) while preserving the locked list capture/unlinking and post-unlock clear/free loop. The stack-chunk loop's block-local prev remains at the start of its while block.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 32/32 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the thread-state deletion helper declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `tstate_delete_common()` blockers at line 2245 (`PyInterpreterState interp = tstate->interp;`), line 2249 (`_PyRuntimeState runtime = interp->runtime;`), and line 2268 (`_PyStackChunk chunk = tstate->datastack_chunk;`), plus `_PyThreadState_DeleteCurrent()`'s post-ensure `gilstate` declaration and `_PyThreadState_DeleteExcept()`'s post-lock `list` declaration. New exact first blocker is line 2457 (`error C2143: syntax error : missing ';' before 'type'`) at `_PyInterpreterFrame f = tstate->cframe->current_frame;` in `PyThreadState_GetFrame()`, followed by line 2464 (`PyFrameObject *frame = _PyFrame_GetFrameObject(f);`) and later declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` new_threadstate C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists new_threadstate()'s PyThreadState *new_tstate, uint64_t id, and PyThreadState *old_head declarations into the function's opening declaration group. new_tstate = alloc_threadstate() remains before the lock, id = interp->threads.next_unique_id remains after the locked increment, and old_head = interp->threads.head remains immediately before the old_head == NULL branch, preserving allocation-before-lock, used_newtstate behavior, initialization branches, and lock/unlock order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 32/32 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `new_threadstate()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `new_threadstate()` blockers at line 1970 (`uint64_t id = interp->threads.next_unique_id;`) and line 1973 (`PyThreadState old_head = interp->threads.head;`). New exact first blocker is line 2080 (`error C2275: 'PyInterpreterState' : illegal use of this type as an expression`) at `PyInterpreterState interp = tstate->interp;` in `_PyState_AddModule()`, followed by declaration-order fallout for `interp` and later locals.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` _PyInterpreterState_IDDecref C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists _PyInterpreterState_IDDecref()'s struct _gilstate_runtime_state *gilstate, int64_t refcount, PyThreadState *tstate, and PyThreadState *save_tstate declarations to the function's opening declaration group. gilstate = &_PyRuntime.gilstate remains immediately after the id_mutex assert; refcount = interp->id_refcount remains after the decrement while the mutex is still held; tstate and save_tstate assignments remain inside the refcount == 0 && interp->requires_idref block, preserving lock acquisition/release plus _PyThreadState_Swap()/Py_EndInterpreter() ordering.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `_PyInterpreterState_IDDecref()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `_PyInterpreterState_IDDecref()` blockers at line 1812 (`struct _gilstate_runtime_state gilstate = &_PyRuntime.gilstate;`), line 1816 (`int64_t refcount = interp->id_refcount;`), and the block-local `tstate`/`save_tstate` declarations. New exact first blocker is line 1876 (`error C2143: syntax error : missing ';' before 'type'`) at `_PyStackChunk res = _PyObject_VirtualAlloc(size_in_bytes);` in `allocate_chunk()`, followed by declaration-order fallout for `res`.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` PyInterpreterState_Get C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists PyInterpreterState_Get()'s PyInterpreterState *interp declaration beside the existing PyThreadState *tstate local. tstate = _PyThreadState_GET() remains immediately before _Py_EnsureTstateNotNULL(tstate), and interp = tstate->interp remains at the original post-ensure point, preserving the fatal-error check and return behavior.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `PyInterpreterState_Get()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `PyInterpreterState_Get()` blocker at line 1719 (`PyInterpreterState interp = tstate->interp;`). New exact first blocker is line 1812 (`error C2143: syntax error : missing ';' before 'type'`) at `struct _gilstate_runtime_state gilstate = &_PyRuntime.gilstate;` in `_PyInterpreterState_IDDecref()`, followed by line 1816 `int64_t refcount = interp->id_refcount;` and later declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` PyInterpreterState_Delete C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists PyInterpreterState_Delete()'s PyInterpreterState **p declaration beside the existing runtime and interpreters locals. The for (p = &interpreters->head; ...) initializer remains under HEAD_LOCK(runtime), preserving the unlink search, remaining-thread checks, main-interpreter checks, assignment to *p, and lock/unlock ordering.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `PyInterpreterState_Delete()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `PyInterpreterState_Delete()` blocker at line 1638 (`PyInterpreterState *p;`). New exact first blocker is line 1719 (`error C2275: 'PyInterpreterState' : illegal use of this type as an expression`) at `PyInterpreterState interp = tstate->interp;` in `PyInterpreterState_Get()`, followed by declaration-order fallout in the same and later functions.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` interpreter_clear C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists interpreter_clear()'s PyThreadState *p declaration beside the existing _PyRuntimeState *runtime local. The p = interp->threads.head; assignment remains at the same point under HEAD_LOCK(runtime), preserving the lock/unlock ordering and the thread-clear loop behavior.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `interpreter_clear()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `interpreter_clear()` blocker at line 1537 (`PyThreadState p = interp->threads.head;`). New exact first blocker is line 1638 (`error C2275: 'PyInterpreterState' : illegal use of this type as an expression`) at `PyInterpreterState *p;` in `PyInterpreterState_Delete()`, followed by declaration-order fallout in the same and later functions.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` PyInterpreterState_New C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists PyInterpreterState_New()'s PyThreadState *tstate, PyThread_type_lock pending_lock, _PyRuntimeState *runtime, struct pyinterpreters *interpreters, int64_t id, and PyInterpreterState *old_head declarations into the function's opening declaration group. tstate = _PyThreadState_GET() remains immediately before the audit, and the pending_lock, runtime, interpreters, id, and old_head assignments stay at the original execution points after the audit, after lock allocation succeeds, after HEAD_LOCK(runtime), and before the old_head == NULL test respectively.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `PyInterpreterState_New()` declaration-hoist slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `PyInterpreterState_New()` blockers at line 1438 (`PyThread_type_lock pending_lock = PyThread_allocate_lock();`) and its `runtime`, `interpreters`, `id`, and `old_head` declaration-order fallout. New exact first blocker is line 1537 (`error C2275: 'PyThreadState' : illegal use of this type as an expression`) at `PyThreadState *p = interp->threads.head;` in `interpreter_clear()`, followed by later declaration-order fallout in the same translation unit.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pystate.c` alloc_for_runtime lock C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pystate.c — hoists alloc_for_runtime()'s PyThread_type_lock lock1, lock2, and lock3 declarations beside PyMemAllocatorEx old_alloc. The three PyThread_allocate_lock() calls remain at their original execution points as assignments; the existing NULL checks, lock1/lock2 cleanup order, allocator restoration, output assignments, and return paths are unchanged.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the `pystate.c` lock declaration slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `alloc_for_runtime()` blockers at lines 1185/1190/1196 (`PyThread_type_lock lock1/lock2/lock3 = PyThread_allocate_lock();`). New exact first blocker is line 1438 (`error C2275: 'PyThread_type_lock' : illegal use of this type as an expression`) at `PyThread_type_lock pending_lock = PyThread_allocate_lock();` in `PyInterpreterState_New()`, followed by that function's `runtime`, `interpreters`, `id`, and `old_head` declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pycore_frame.h` frame inline C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Include/internal/pycore_frame.h — hoists the first VC6/C89 mixed-declaration blockers exposed while compiling Python/pystate.c: _PyFrame_GetFrameObject() now declares PyFrameObject *res before the assert() and assigns frame->frame_obj at the original point; _PyThreadState_BumpFramePointer() keeps _PyInterpreterFrame *res scoped inside the stack-space if block but declares it before the assignment; _PyFrame_GetGenerator() declares size_t offset_in_gen before the assert() and assigns offsetof(PyGenObject, gi_iframe) at the original point.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary v3.11.16 cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — still compiles cleanly after the header slice
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — gets past the prior `pycore_frame.h` blockers at `_PyFrame_GetFrameObject()`, `_PyThreadState_BumpFramePointer()`, and `_PyFrame_GetGenerator()`. New exact first blocker is line 1185 (`error C2275: 'PyThread_type_lock' : illegal use of this type as an expression`) at `PyThread_type_lock lock1 = PyThread_allocate_lock();` in `threadstate_update_waiting_for_thread_shutdown()`, followed by the same function's `lock2` and `lock3` declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` call_ll_exitfuncs C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists call_ll_exitfuncs()'s void (*exitfunc)(void) declaration before the loop and assigns it at the original post-decrement point, preserving the decrement, slot clearing, LIFO invocation order, and final stdout/stderr flushes.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 0 — gets past the prior line 3045 `void (*exitfunc)(void) = runtime->exitfuncs[runtime->nexitfuncs];` blocker in `call_ll_exitfuncs()`; no next `pylifecycle.c` blocker was found because the translation unit now compiles cleanly in the VC6 core compile probe.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` fatal_error/_Py_FatalErrorFormat C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists fatal_error() locals (runtime, tstate, interp, tss_tstate, and has_tstate_and_gil) into the function declaration area while preserving the original assignment/evaluation points, including runtime = &_PyRuntime, interp = NULL, tss_tstate = PyGILState_GetThisThreadState(), and the has_tstate_and_gil boolean assignment. _Py_FatalErrorFormat() now declares stream, fd, and vargs before its reentrancy check, then assigns stream = stderr and fd = fileno(stream) at the original post-reentrancy point before output begins.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 2866 `_PyRuntimeState runtime = &_PyRuntime;` blocker in `fatal_error()` plus the immediately adjacent `tstate`/`interp`/`tss_tstate`/`has_tstate_and_gil` declaration-order fallout and `_Py_FatalErrorFormat()`'s `FILE stream`, `fd`, and `va_list vargs` mixed declarations. New exact first blocker is line 3045 (`error C2143: syntax error : missing ';' before 'type'`) at `void (*exitfunc)(void) = runtime->exitfuncs[runtime->nexitfuncs];` in `call_ll_exitfuncs()`.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` fatal-error dump C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists fatal_error_dump_runtime()'s PyThreadState *finalizing to the function declaration area and assigns it at the original point after the PUTS() call. _Py_DumpExtensionModules() now declares its function-scope locals (modules, pos, key, value, stdlib_module_names, header, and count) before the interp == NULL early return; the modules, stdlib_module_names, header, and count initializers are preserved as assignments at their original execution points. The inner is_stdlib_ext, i, item, and hash block declarations are unchanged.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ tree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 2698 `PyThreadState finalizing = _PyRuntimeState_GetFinalizing(runtime);` blocker in `fatal_error_dump_runtime()` and the adjacent `_Py_DumpExtensionModules()` function-scope declaration-order blockers. New exact first blocker is line 2866 (`error C2275: '_PyRuntimeState' : illegal use of this type as an expression`) at `_PyRuntimeState runtime = &_PyRuntime;` in `fatal_error()`, followed by additional `fatal_error()` declaration-order fallout.
`git apply --check compat/msvc600/cpython-3.11.16-vc6-headers.patch` against pristine `v3.11.16` tree	exit 0

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` is_valid_fd platform-branch C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists is_valid_fd()'s platform-branch locals into the function declaration area under the same preprocessor ladder: int fd2 for the Linux dup() branch, HANDLE hfile for MS_WINDOWS, and struct stat st for the fallback branch. The existing fd < 0 early return, platform conditions, and branch behavior are unchanged; the original declaration sites now only assign/use (fd2 = dup(fd), _get_osfhandle(), and fstat(fd, &st)).
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 2296 `HANDLE hfile;` blocker in `is_valid_fd()`. New exact first blocker is line 2403 (`error C2275: 'PyObject' : illegal use of this type as an expression`) at `PyObject encoding_str = PyUnicode_FromWideChar(encoding, -1);` in `create_stdio()`, followed by line 2409 `PyObject errors_str = PyUnicode_FromWideChar(errors, -1);` and later declaration-order blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` add_main_module shadowed-loader C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists PyObject *bimod and a distinct PyObject *loader_obj into add_main_module()'s existing declaration group. The builtins import and BuiltinImporter lookup remain at their original execution points; the outer borrowed loader variable and its NULL/Py_None test are unchanged, while loader_obj carries only the formerly shadowed strong reference through its NULL check, __loader__ dict set, and decref.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 2212 `PyObject bimod = PyImport_ImportModule("builtins");` blocker and the same function's formerly shadowed line 2233 `PyObject loader = PyObject_GetAttrString(...)` declaration-order blocker in `add_main_module()`. New exact first blocker is line 2296 (`error C2275: 'HANDLE' : illegal use of this type as an expression`) at `HANDLE hfile;` in `is_valid_fd()`, followed by later declaration-order blockers in `create_stdio()` and finalization diagnostics.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` finalize_modules C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists int verbose and PyObject *weaklist to the top declaration group in finalize_modules(). verbose is assigned after the existing modules == NULL early return, and weaklist is assigned at the original finalize_remove_modules(modules, verbose) call site, preserving early-return behavior and call order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1606 `int verbose = _PyInterpreterState_GetConfig(interp)->verbose;` blocker and line 1624 `PyObject weaklist = finalize_remove_modules(modules, verbose);` in `finalize_modules()`. New exact first blocker is line 1838 (`error C2275: 'PyThreadState' : illegal use of this type as an expression`) at `PyThreadState tstate = _PyRuntimeState_GetThreadState(runtime);` in `Py_FinalizeEx()`, followed by line 1868 `int malloc_stats = tstate->interp->config.malloc_stats;` and later finalization declaration-order blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` finalize_modules_clear_weaklist C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists Py_ssize_t i plus PyObject *tup, name, mod, and dict to the top declaration group in finalize_modules_clear_weaklist(). The reverse loop now assigns i = PyList_GET_SIZE(weaklist) - 1 at the original loop point, and each former loop-local declaration is now an assignment at the same position, preserving evaluation order and the two existing continue paths.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1551 `for (Py_ssize_t i = PyList_GET_SIZE(weaklist) - 1; i >= 0; i--)` blocker and the same loop's `PyObject tup`, `name`, `mod`, and `dict` mixed declarations. New exact first blocker is line 1606 (`error C2143: syntax error : missing ';' before 'type'`) at `int verbose = _PyInterpreterState_GetConfig(interp)->verbose;` in `finalize_modules()`, followed by line 1624 `PyObject weaklist = finalize_remove_modules(modules, verbose);` and later finalization declaration-order blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` finalize_modules_delete_special C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists const char * const *p and PyObject *value to the top declaration group in finalize_modules_delete_special(). The first loop now assigns p = sys_deletes at the original declaration point, and the second loop assigns value = _PyDict_GetItemStringWithError(...) where the mixed declaration used to be. name and orig_name remain loop-local, preserving their evaluation/order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1411 `const char * const p;` blocker and the line 1426 `PyObject value` blocker in `finalize_modules_delete_special()`. New exact first blocker is line 1551 (`error C2143: syntax error : missing ';' before 'type'`) at `for (Py_ssize_t i = PyList_GET_SIZE(weaklist) - 1; i >= 0; i--)` in `finalize_modules_clear_weaklist()`, followed by `PyObject tup`, `PyObject name`, `PyObject mod`, and `PyObject dict` mixed declarations in the same loop/function plus later finalization blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` pyinit_main/public initialization API C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists declaration-order blockers in pyinit_main(), Py_InitializeFromConfig(), Py_InitializeEx(), and _Py_InitializeMain(). Locals are declared at function top, while assignments/calls (tstate->interp, _PyRuntime_Initialize(), &_PyRuntime, tstate = NULL, _PyConfig_InitCompatConfig(), and _PyRuntimeState_GetThreadState(runtime)) remain at their original execution points to preserve behavior.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1285 `PyStatus status = init_interp_main(tstate);` blocker in `pyinit_main()` and the declaration-order fallout in `Py_InitializeFromConfig()`, `Py_InitializeEx()`, and `_Py_InitializeMain()`. New exact first blocker is line 1411 (`error C2143: syntax error : missing ';' before 'const'`) at `const char * const p;` in `finalize_modules_delete_special()`, followed by `PyObject value` in the same function and later finalization mixed-declaration blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` pyinit_core/init_interp_main C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists PyConfig config to the top of pyinit_core() while leaving PyConfig_InitPythonConfig(&config) at its original execution point. init_interp_main() now declares PyStatus status, then initialized is_main_interp, interp, and config at function top before the existing assert, preserving the declaration initializer order requested for this narrow VC6 declaration-order slice.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1104 `PyConfig config;` blocker in `pyinit_core()` and the immediately exposed `init_interp_main()` mixed declarations. New exact first blocker is line 1285 (`error C2275: 'PyStatus' : illegal use of this type as an expression`) at the mixed declaration `PyStatus status = init_interp_main(tstate);` in `pyinit_main()`, followed by additional declaration-order fallout in `Py_InitializeFromConfig()` and later functions.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` pre-initialization C89/C99 slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — removes the two pre-initialization _PyArgv designated initializers in Py_PreInitializeFromBytesArgs() and Py_PreInitializeFromArgs() by declaring args first and assigning use_bytes_argv, argc, and the active argv pointer field explicitly before the existing _Py_PreInitializeFromPyArgv() call. _Py_PreInitializeFromConfig() now declares PyStatus status, _PyRuntimeState *runtime, PyPreConfig preconfig, and _PyArgv config_args at function top, assigns status/runtime at their original execution points, and replaces the args == NULL branch's designated config_args initializer with field-by-field assignments immediately before the existing call. Evaluation and call order are unchanged.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 1008 and 1016 `_PyArgv args = { .use_bytes_argv = ... }` designated initializers, plus the mixed declarations and designated `config_args` initializer inside `_Py_PreInitializeFromConfig()`. New exact first blocker is line 1104 (`error C2275: 'PyConfig' : illegal use of this type as an expression`) at the mixed declaration `PyConfig config;` in `pyinit_core()`, followed by nearby `pyinit_main()` declaration-order blockers and later C89/C99 fallout.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` builtins C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists the remaining VC6-rejected PyObject * declarations in pycore_init_builtins() (bimod, builtins_dict, isinstance, len, list_append, and import_func) to the function top, then assigns each at its original execution site. Evaluation order and existing error paths are unchanged; each local is still assigned before use.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past all mixed declarations in `pycore_init_builtins()`. New exact first blocker is line 912 (`error C2143: syntax error : missing ';' before 'const'`) at the mixed declaration `const PyConfig *config = _PyInterpreterState_GetConfig(interp);` in `pycore_interp_init()`, followed by the undeclared `config` fallout and later C89/C99 blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` create-interpreter C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists only the two next VC6-rejected declarations in pycore_create_interpreter(): PyInterpreterState *interp and PyThreadState *tstate are now declared at function top, while _PyGILState_Init(runtime), PyInterpreterState_New(), and PyThreadState_New(interp) still execute at their original call sites and in the same order.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 682 `pycore_create_interpreter()` `PyInterpreterState interp` mixed declaration and line 693 `PyThreadState tstate` mixed declaration. New exact first blocker is line 812 (`error C2275: 'PyObject' : illegal use of this type as an expression`) at the mixed declaration `PyObject builtins_dict = PyEval_GetBuiltins();` in `pycore_init_builtins()`, followed by the same function's line 819 `PyObject isinstance = PyDict_GetItem(...)` and additional C89 mixed-declaration blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`pylifecycle.c` interpreter-config C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists only the interpreter-configuration PyStatus locals that VC6 rejected as mixed declarations: interpreter_update_config() now declares one PyStatus status at function top and assigns it at the two original call sites, and _PyInterpreterState_SetConfig() declares PyConfig config / PyStatus status before calling PyConfig_InitPythonConfig(). Assignment/evaluation order is unchanged and the former inner status shadowing is removed.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 528 `_PyInterpreterState_SetConfig()` mixed-declaration blocker and the nearby line 505 `interpreter_update_config()` `PyStatus` shadow declaration. New exact first blocker is line 580 (`error C2275: 'PyInterpreterState' : illegal use of this type as an expression`) at the mixed declaration `PyInterpreterState *interp = tstate->interp;` in `pyinit_core_reconfigure()`, followed by additional C89 mixed-declaration blockers including line 614 `PyStatus status = _PyConfig_Write(config, runtime);` in `pycore_init_runtime()`.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`_PyStatus_OK()` recursion fix and `_PyStatus_ERR()` VC6 helper slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Include/internal/pycore_initconfig.h — replaces the VC6-only _PyStatus_OK() mapping to PyStatus_Ok() with a local static C89 helper that assigns all PyStatus fields explicitly, avoiding the PyStatus_Ok() -> _PyStatus_OK() -> PyStatus_Ok() recursion. Adds a VC6-only _PyStatus_ERR() helper that assigns _type = _PyStatus_TYPE_ERROR, func = NULL (matching public PyStatus_Error() semantics because VC6 has neither __func__ nor __FUNCTION__), err_msg, and exitcode = 0. Non-VC6 compound-literal macros are unchanged.
scripts/fixtures/vc6_compound_literal_smoke.c — now exercises both _PyStatus_OK() and _PyStatus_ERR() through the real internal header.
scripts/vc6-probe-core.test.sh — adds a focused regression check that _PyStatus_OK() no longer maps to PyStatus_Ok(), and updates the compound-literal smoke-test description.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_compound_literal_smoke.c`	exit 0 — focused smoke fixture compiles while calling both `_PyStatus_OK()` and `_PyStatus_ERR()` directly under VC6.
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 28/28 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 259 `_PyStatus_ERR("external importer setup failed")` compound-literal blocker. New exact first blocker is line 528 (`error C2275: 'PyStatus' : illegal use of this type as an expression`) at the mixed declaration `PyStatus status = _PyConfig_Copy(&config, src_config);` in `_PyInterpreterState_SetConfig()`, followed by additional C89 mixed-declaration blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`init_importlib()` C89 declaration-hoist slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — hoists only the existing init_importlib() local declarations (interp, verbose, importlib, imp_mod, value) to the top of the function, then preserves the prior assignment/evaluation order after the existing assertion and at each original use site.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ worktree exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 27/27 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 202 `init_importlib()` mixed-declaration blocker. New exact first blocker is line 259 (`error C2059: syntax error : '{'`) at `_PyStatus_ERR("external importer setup failed")` in `init_importlib_external()`, followed by further `PyStatus` compound-literal/designated-initializer and C89 mixed-declaration blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`_PyStatus_OK()` VC6 macro fallback slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Include/internal/pycore_initconfig.h — keeps the existing C99 compound-literal _PyStatus_OK() macro for non-VC6 compilers, but maps _PyStatus_OK() to the existing public PyStatus_Ok() API only for _MSC_VER < 1300 so VC6 no longer has to parse (PyStatus){._type = ...} at _PyRuntime_Initialize().
scripts/fixtures/vc6_compound_literal_smoke.c — now exercises _PyStatus_OK() itself, verifying the VC6-only macro fallback rather than bypassing it by calling PyStatus_Ok() directly.
scripts/vc6-probe-core.test.sh — updates the focused compound-literal smoke-test description for the shared macro fallback.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits. Reproducibility check: git apply --check against a pristine temporary cpython/ copy exited 0.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_compound_literal_smoke.c`	exit 0 — focused smoke fixture now compiles while calling `_PyStatus_OK()` directly under VC6.
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 27/27 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior line 143 `_PyStatus_OK()` compound-literal blocker. New exact first blocker is line 202 (`error C2143: syntax error : missing ';' before 'type'`), the existing C89 mixed-declaration wall in `init_importlib()`, followed by further declaration-order and remaining non-OK compound-literal/designated-initializer blockers.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in previous revision (`_PyRuntimeState_INIT` VC6 replacement slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Include/internal/pycore_runtime_init.h — keeps the existing C99 designated initializer path for non-VC6 compilers, but exposes _PyRuntimeState_InitStaticDefaults() for VC6 instead of making VC6 parse _PyRuntimeState_INIT.
cpython/Python/pylifecycle.c — leaves _PyRuntime zero-initialized only for VC6, then calls the shared explicit defaults routine once before _PyRuntimeState_Init(). Non-VC6 still uses = _PyRuntimeState_INIT.
cpython/Python/pystate.c — adds the VC6 field-by-field default routine used by both the process-global runtime and later runtime/interpreter/thread resets. It explicitly preserves the required defaults: gilstate.check_enabled = 1, zeroed Py_tss_NEEDS_INIT storage, interpreters.next_id = -1, global small ints/bytes/strings/empty tuple, _main_interpreter (_static, id_refcount, recursion/gc thresholds), and _initial_thread (_static, recursion limit, context_ver = 1). Non-VC6 still uses the upstream static const initial = _PyRuntimeState_INIT/memcpy path.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated from git -C cpython diff; includes this slice plus earlier uncommitted compatibility edits.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 27/27 checks `ok`; `Modules/main.c` still compiles cleanly
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — the `_PyRuntime` definition no longer fails at `_PyRuntimeState_INIT` line 112. New first error is line 143 (`_PyStatus_OK()` compound literal), followed by existing C89 declaration-order and C99 initializer blockers in the rest of the file.
`bash scripts/vc6-probe-core.sh cpython/Python/pystate.c`	exit 2 — the former `static const _PyRuntimeState initial = _PyRuntimeState_INIT` C2059 errors are gone and later `initial._main_interpreter` reset users are covered by the same VC6 defaults helpers. Current first errors are pre-existing C89 declaration-order issues in `pycore_frame.h` and then in `pystate.c`; no remaining `_PyRuntimeState_INIT` parse error is reported before the 100-error cap.

Caveat: this is still compile-probe work only. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Files changed in this revision (`pylifecycle.c` VC6 PyRuntime section slice)

All still uncommitted; nothing in this list has been pushed anywhere.

cpython/Python/pylifecycle.c — narrow VC6-only compatibility edit for the first Python/pylifecycle.c blocker: keep the modern Windows #pragma section("PyRuntime", read, write) + __declspec(allocate("PyRuntime")) path unchanged for non-VC6 compilers, but use VC6's supported #pragma data_seg("PyRuntime") / #pragma data_seg() spelling around the initialized _PyRuntime object when _MSC_VER < 1300. The _PyRuntimeState_INIT initializer remains exactly at the definition site.
compat/msvc600/cpython-3.11.16-vc6-headers.patch — regenerated in full from git -C cpython diff; now 767 lines and includes the Python/pylifecycle.c hunk alongside previous uncommitted compatibility edits.
PORT_STATUS.md — this revision.

Command results (all reproduced in this revision):

Command	Result
`bash scripts/vc6-probe.test.sh`	exit 0, `ALL TESTS PASSED` — 6/6 checks `ok`
`bash scripts/vc6-probe-core.test.sh`	exit 0, `ALL TESTS PASSED` — 27/27 checks `ok`; includes `Modules/main.c` compile-only clean check
`bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c`	exit 2 — gets past the prior VC6-incompatible `PyRuntime` section pragma/declaration pair; no `unknown pragma` warning and no `C2341` segment error remain. New first blocker is `cpython\Python\pylifecycle.c(112) : error C2059: syntax error : '.'` in `_PyRuntimeState_INIT`, followed by more C99 compound-literal/designated-initializer and C89 mixed-declaration errors; the run later hits `fatal error C1003` at line 1232.

Caveat: all probe results here are compile-only (/c) results. No link, no pythoncore/python.exe build, no Wine launch, and no Windows 98 runtime execution was attempted or claimed.

Verified

CPython source checkout is at the requested v3.11.16 baseline.
The MSVC600 tool bundle is present locally and its VC98/bin/VCVARS32.BAT environment script runs under Wine.

MSVC6 reports:

Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86

A direct compile probe reaches CPython 3.11 headers. The first unmodified probe fails before linking, proving the compiler is being invoked against the intended baseline.
Project-local compatibility headers have been added under compat/msvc600/: inttypes.h (first isolated shim) and, as of this revision, stdbool.h (see "stdbool slice" below). Neither is declared sufficient for the port on its own.
scripts/vc6-probe.sh was fixed and is now truthful. The script piped cl.exe output through grep/sed to drop Wine's :err: debug noise and to shorten absolute host paths to repo-relative ones. The path-shortening step was silently broken: it built a sed pattern directly from a Windows-style path (e.g. Z:\home\ubuntu\...\), and both sed BRE and bash glob patterns treat a bare \ in a pattern as an escape character, so \h, \u, \p, etc. were consumed as (mostly no-op) escapes instead of literal characters and the substitution never matched anything — diagnostics always showed full absolute Wine paths instead of the intended repo-relative ones. Fixed by matching the prefix as a literal string via a quoted bash ${line//"$prefix"/} expansion (quoting forces literal, not glob, matching) instead of an unescaped regex. The pipeline's exit-status capture via PIPESTATUS[0] was already correct (verified with a deliberately broken translation unit: cl.exe's real nonzero exit code propagated correctly both before and after this fix); it is now covered by a regression test so it cannot regress silently. A new regression test, scripts/vc6-probe.test.sh, exercises both the path-stripping helper directly and — when wine + MSVC600 are available, as they are in this environment — the real script against a deliberately invalid .c file, asserting a nonzero exit code, a surfaced error C diagnostic, and no leaked absolute Wine path. Run: bash scripts/vc6-probe.test.sh. Last run: all 6 checks ok.
**Include/internal/pycore_atomic.h's VC6/intrin.h blocker is now resolved for 32-bit x86 (_M_IX86) and verified; see "Atomics slice" below for full detail and honesty notes on what is and is not covered.
**Include/internal/pycore_interp.h's VC6/<stdbool.h> blocker is now resolved and verified; see "stdbool slice" below for full detail.
**The VC6 C89-vs-C99 mixed-declarations blocker in four Include/internal/pycore_*.h headers (pycore_code.h, pycore_dict.h, pycore_list.h, pycore_call.h) reachable from Modules/main.c is now resolved and verified; see "Mixed-declarations header slice" below for full detail.
The same C89-vs-C99 mixed-declarations pattern, pervasive within Modules/main.c's own body (29 error sites across roughly a dozen functions), is now also resolved and verified; see "Modules/main.c declaration-order slice" below for full detail. With that fix applied, Modules/main.c hits a new, unrelated, and out-of-scope-for-that-slice blocker: several C99 compound-literal/designated-initializer macros (_PyStatus_OK(), _PyCompilerFlags_INIT, and the _PyArgv-style struct literals in Py_Main()/Py_BytesMain()) that VC6 does not support at all, independent of declaration position.
That compound-literal/designated-initializer blocker is now also resolved and verified for all 8 sites in Modules/main.c; see "Compound-literal / designated-initializer slice" below for full detail. With that fix applied, cpython/Modules/main.c compiles with cl.exe exit status 0 under scripts/vc6-probe-core.sh — no errors, no warnings. This is a compile-only (/c) result for one translation unit; it is not a link, not a pythoncore/python.exe build, and not a runtime claim (vc6-probe-core.sh never attempts to link). Probing the next core translation unit in Modules/main.c's own call chain, Python/pylifecycle.c, hits the same two already-solved blocker classes again (recurring, not novel) plus enough additional errors to exceed the compiler's 100-error cap before the whole file is even seen; see "Next blocker: Python/pylifecycle.c" below. No link or runtime success is claimed anywhere in this document.

`pycore_object.h` VC6 `func` / GC helper declaration-order slice

Scope: one internal header only, as requested. The real Python/pylifecycle.c core probe previously stopped first in Include/internal/pycore_object.h: VC6 reported __func__ undeclared at the _PyObject_ASSERT_FROM(..., __func__) calls in _PyObject_GC_TRACK(), then cascaded into C89 mixed-declaration errors for the local PyGC_Head * and PyInterpreterState * declarations in _PyObject_GC_TRACK() and _PyObject_GC_UNTRACK().

The header now has a VC6-only fallback:

#if defined(_MSC_VER) && _MSC_VER < 1300 && !defined(__func__)
#  define __func__ "<unknown>"
#endif

A quick VC6 smoke probe showed __FUNCTION__ is also unavailable in VC6, so there was no exact function-name extension to preserve. This mapping only degrades debug/fatal diagnostic function-name text on VC6; C99 compilers and newer MSVC keep their normal behavior. The only declaration-order edits are the mechanical C89 transform in _PyObject_GC_TRACK() and _PyObject_GC_UNTRACK(): declarations at block start, assignments left at the original evaluation points.

Verification: bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c now gets past pycore_object.h; the new first blocker is the Windows section-allocation pragma pair in Python/pylifecycle.c (see "Next blocker" below).

Atomics slice (`pycore_atomic.h`, VC6 / `_M_IX86`)

Scope: 32-bit x86 only, matching this port's only target (Windows 9x has no x64 edition). Include/internal/pycore_atomic.h previously included <intrin.h> and used _Interlocked* compiler intrinsics unconditionally for any _MSC_VER-defined compiler; VC6 (_MSC_VER 1200) has neither. The now-applied, still-uncommitted compat/msvc600/cpython-3.11.16-vc6-headers.patch adds two things to this header, both gated strictly to defined(_MSC_VER) && _MSC_VER < 1300 && defined(_M_IX86) (a new _Py_ATOMIC_VC6_X86 macro) so every other compiler/version — including modern MSVC on _M_X64/ARM and the GCC/clang/C11 paths — keeps its exact prior behavior, byte-for-byte (verified: git diff on the non-VC6 branches shows only their line numbers moving under the new #elif, no content changes):

The top-of-file <intrin.h>/<immintrin.h> include is skipped for VC6/_M_IX86; <windows.h> is included instead, to declare InterlockedExchange/InterlockedCompareExchange.
A new #if defined(_Py_ATOMIC_VC6_X86) branch (ahead of the existing _M_IX86 || _M_X64 branch, now #elif) implements _Py_atomic_store_explicit/_Py_atomic_load_explicit for _Py_atomic_int/_Py_atomic_address using the Win32 InterlockedExchange/InterlockedCompareExchange API — present in KERNEL32.DLL since Windows 98 (confirmed against this project's actual MSVC600 VC98 SDK headers, MSVC600/VC98/Include/WINBASE.H, which declare both for _M_IX86 outside the MRx000/Alpha-only intrinsic path). Both give a full memory barrier on x86, same as the intrinsics they replace, so — as the original comment already notes for the HLE-unavailable case — every _Py_memory_order maps to the same fully-fenced operation; VC6 has no HLE (_HLEAcquire/_HLERelease, VS2013+) intrinsics or hardware support to preserve here regardless.

64-bit atomics are explicitly NOT implemented, and this is not a gap in practice for this port. _Py_atomic_address (uintptr_t) and _Py_atomic_int (int) are both 4 bytes on 32-bit x86, so the existing sizeof(...) == 8 branches that select the 64-bit store/load paths in the pre-existing _M_IX86 || _M_X64 code are already unreachable dead code on _M_IX86 upstream, before this patch — VC6 never defines _M_X64. The VC6 branch added here therefore has no 64-bit path to implement, and a #error guards the (unreachable-under-VC6) case where _M_X64 were ever also defined, so a future misconfiguration fails loudly at compile time instead of silently truncating a 64-bit atomic. No CMPXCHG8B inline assembly was written, and none is required for this header; if some other part of the port needs genuine 64-bit interlocked ops on VC6 later, that is a separate, not-yet-encountered problem, not something papered over here.

Verified with two independent probes, both under scripts/vc6-probe-core.sh (new; extends scripts/vc6-probe.sh's approach to Py_BUILD_CORE translation units — /D Py_BUILD_CORE plus Include/internal on the include path):

scripts/fixtures/vc6_atomic_smoke.c (new) — a minimal, isolated translation unit that includes only pycore_atomic.h (via <inttypes.h> for uintptr_t, which real callers get from Python.h/pyport.h) and exercises _Py_atomic_store/_Py_atomic_load and their _relaxed variants on both _Py_atomic_int and _Py_atomic_address:
```
$ bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_atomic_smoke.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : scripts/fixtures/vc6_atomic_smoke.c
...
vc6_atomic_smoke.c

== cl.exe exit status: 0 ==
```
No errors, no warnings.
cpython/Modules/main.c, the same real core translation unit identified as the next blocker previously. It now compiles past pycore_atomic.h (reached transitively via pycore_runtime.h before pycore_interp.h) and hits a new, different, and unrelated blocker:
```
$ bash scripts/vc6-probe-core.sh
== MSVC600 Py_BUILD_CORE compile probe ==
source : cpython/Modules/main.c
...
cpython\Include\internal\pycore_interp.h(11) : fatal error C1083:
Cannot open include file: 'stdbool.h': No such file or directory

== cl.exe exit status: 2 ==
```
Include/internal/pycore_interp.h line 11 does #include <stdbool.h> before its own #include "pycore_atomic.h" on line 13 — a C99 standard header VC6 does not ship, unrelated to atomics. This is the next blocker for this port and is left unaddressed here, out of scope for this slice.

Both probes are covered by a new regression test, scripts/vc6-probe-core.test.sh, which additionally asserts (so this result cannot regress silently) that a deliberately broken translation unit still fails with a surfaced error C diagnostic, and that Modules/main.c's current failure is specifically not at pycore_atomic.h/intrin.h (i.e. that blocker has not resurfaced). Run: bash scripts/vc6-probe-core.test.sh. At the time this atomics slice was written, this was all 6 checks ok; the stdbool slice below added 5 more checks to the same file (now 11; see that section for the current count and last-run result). scripts/vc6-probe.test.sh was re-run after the atomics change and still passed (all 6 checks ok), confirming the public-header probe was unaffected.

stdbool slice (`pycore_interp.h`, VC6 / C99 `<stdbool.h>`)

Include/internal/pycore_interp.h line 11 does #include <stdbool.h> before its own #include "pycore_atomic.h" on line 13 — a C99 standard header VC6 (_MSC_VER 1200, which predates C99 entirely) does not ship. In VC6's C mode, bool/true/false are not keywords at all (they are C++-only there), and there is no standard-library <stdbool.h> to fall back on.

The now-added, still-uncommitted compat/msvc600/stdbool.h is a project-local fallback for this single header, not a patch to CPython source. It is picked up purely through include-path ordering: both scripts/vc6-probe.sh and scripts/vc6-probe-core.sh already put compat/msvc600 first on the VC6 /I include path (needed earlier for compat/msvc600/inttypes.h), so VC6's #include <stdbool.h> resolves to this project-local header before it would ever reach a (nonexistent) system one. Nothing under cpython/ changes for this slice, so compat/msvc600/cpython-3.11.16-vc6-headers.patch is unchanged. Every other compiler is unaffected for the same reason a browser's /I search order doesn't affect other browsers: compat/msvc600 is never added to any other compiler's include path, so a conforming C99/C11 compiler still gets its own real <stdbool.h> (or built-in _Bool/bool), untouched. As defence in depth (not because it is expected to be reachable), the header itself also #errors out if included under anything but _MSC_VER < 1300.

The shim defines the same four names as the standard C99 header — bool (as int, since VC6 has no _Bool built-in type to alias), true, false, and __bool_true_false_are_defined — as plain #define macros rather than a typedef, matching the standard's requirement that a conforming program be able to #undef/redefine bool/true/false.

Verified with the same two-probe approach used for the atomics slice:

scripts/fixtures/vc6_stdbool_smoke.c (new) — a minimal, isolated translation unit that includes only <stdbool.h> and exercises bool/true/false/__bool_true_false_are_defined:

$ bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_stdbool_smoke.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : scripts/fixtures/vc6_stdbool_smoke.c
...
vc6_stdbool_smoke.c

== cl.exe exit status: 0 ==

No errors, no warnings.

cpython/Modules/main.c, the same real core translation unit used to verify the atomics slice. It now compiles past pycore_interp.h line 11 (reached the same way as before, transitively via pycore_runtime.h) — the fatal stdbool.h/C1083 error is gone — and proceeds through pycore_atomic.h and pycore_ast_state.h before hitting a new, unrelated, and considerably larger blocker; see "Current first-blocker evidence" below for the full detail.

Both probes are covered by 5 new checks added to the existing scripts/vc6-probe-core.test.sh (positive isolated-fixture compile, no-errors check, a negative deliberately-broken-fixture check, its error-surfaced check, and a check that Modules/main.c's output no longer contains Cannot open include file: 'stdbool.h'), bringing that file to 11 checks total. Run: bash scripts/vc6-probe-core.test.sh. Last run: all 11 checks ok (wine + MSVC600 available in this environment). scripts/vc6-probe.test.sh was re-run after this change and still passes (all 6 checks ok), confirming the public-header probe is unaffected.

Mixed-declarations header slice (`pycore_code.h`, `pycore_dict.h`, `pycore_list.h`, `pycore_call.h`)

Scope: the four Include/internal/pycore_*.h headers that the Modules/main.c #include chain directly reaches with VC6 C89 mixed-declaration violations, and no others. This is a bounded slice of the "Compiler language gap" blocker recorded below, not an attempt at the whole gap: it fixes exactly the sites the real core probe (Modules/main.c via scripts/vc6-probe-core.sh) hits inside CPython's own headers, and stops there. Modules/main.c itself has the same pattern pervasively throughout its own function bodies; that is explicitly out of scope for this slice and is now the next recorded blocker (see "Current first-blocker evidence" below) rather than something papered over here.

Six static inline functions across the four headers declared a variable after a preceding statement (typically an assert(...)), which C89 (VC6's only supported dialect, give or take Microsoft extensions) does not allow inside a block — only C99 does. VC6's parser, on hitting the declaration where it expects a statement, fails to recognize it as a declaration at all and instead cascades into unrelated-looking C2065/C2109/C2106 errors for the rest of the block, exactly as described for the first instance (pycore_code.h:154) in earlier revisions of this document.

The now-applied, still-uncommitted compat/msvc600/cpython-3.11.16-vc6-headers.patch fixes each site the same way: hoist the declaration (no initializer) to the top of its enclosing block, and turn the original TYPE name = expr; into a plain assignment (name = expr;) at its original position. This changes no evaluation order and no semantics — it is the standard, mechanical C89 transform for this exact pattern — and is applied only to the six functions that actually needed it, not the surrounding file:

Include/internal/pycore_code.h: _PyLocals_GetKind(), _PyLocals_SetKind() (both hoist a char *ptr), and adaptive_counter_backoff() (hoists unsigned int value).
Include/internal/pycore_dict.h: _PyDictValues_AddToInsertionOrder() (hoists uint8_t *size_ptr and int size).
Include/internal/pycore_list.h: _PyList_AppendTakeRef() (hoists Py_ssize_t len and Py_ssize_t allocated).
Include/internal/pycore_call.h: _PyVectorcall_FunctionInline() (hoists PyTypeObject *tp, Py_ssize_t offset, and vectorcallfunc ptr).

Every other compiler is unaffected: these are plain C source edits (no #ifdef/_MSC_VER gating, unlike the atomics slice), and hoisting a declaration without an initializer, then assigning immediately after the same statements that used to compute the initializer, is behavior-identical under C89, C99, C11, and C++ alike — no code path, value, or evaluation order changes for any compiler already accepting the original source.

Verified with the same two-probe approach used for the atomics and stdbool slices:

scripts/fixtures/vc6_mixed_decls_smoke.c (new) — includes the real Python.h (these four headers assume public types like PyObject, PyCodeObject, PyListObject, PyDictValues, and vectorcallfunc already declared, the same way real CPython .c sources reach them, so full isolation without Python.h is not meaningful here unlike the atomics/stdbool fixtures) plus all four headers, and calls all six fixed functions:
```
$ bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_mixed_decls_smoke.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : scripts/fixtures/vc6_mixed_decls_smoke.c
...
vc6_mixed_decls_smoke.c
...
== cl.exe exit status: 0 ==
```
No errors, no warnings.
cpython/Modules/main.c, the same real core translation unit used for the earlier slices. All four headers now compile clean — no pycore_code.h/pycore_dict.h/pycore_list.h/pycore_call.h error appears anywhere in the probe output — and the compiler proceeds entirely into Modules/main.c's own body, where a new, considerably larger, and out-of-scope-for-this-slice blocker is hit; see "Current first-blocker evidence" below.

Modules/main.c declaration-order slice

Scope: the C89-vs-C99 mixed-declarations pattern inside Modules/main.c's own function bodies only — declaration position, not any other C99 feature. No other file was touched, and no whole-tree mechanical rewrite was attempted. This is the follow-on to the "Mixed-declarations header slice" above: the same pattern (a block-scope declaration appearing after a preceding statement, which C89's parser cannot recognize as a declaration), but recurring roughly a dozen times across Modules/main.c's own ~740 lines rather than in a handful of small header functions.

The now-applied, still-uncommitted compat/msvc600/cpython-3.11.16-vc6-headers.patch fixes every site the same mechanical way used for the header slice: hoist the bare declaration (no initializer) to the top of its enclosing block, and turn the original TYPE name = expr; into a plain assignment (name = expr;) at its original position. This changes no evaluation order and no semantics for any compiler, VC6 or otherwise. Two variants of this same transform were needed, both already implicit in the mechanical rule but worth calling out explicitly:

A declaration whose original initializer is a side-effecting call (e.g. FILE *fp = _Py_fopen_obj(filename, "rb"); in pymain_run_file_obj()) is hoisted bare and the call is kept as an assignment at its original position, specifically so the call still happens after the same preceding statements (an audit-hook check, in this case) instead of moving earlier and changing behavior.
A platform-conditional declaration with the same name but a different type per branch (pymain_run_startup()'s env: const wchar_t *env under #ifdef MS_WINDOWS, const char *env under #else) is hoisted under the identical #ifdef/#else/#endif structure at the top of the function, so each platform still only ever sees its own declaration.

Functions touched (8 total, 20 hoisted declarations, all in cpython/Modules/main.c): pymain_init() (preconfig, config), pymain_import_readline() (mod), pymain_run_command() (cf), pymain_run_file_obj() (fp, sb, cf, run), pymain_run_file() (filename, program_name, res), pymain_run_startup() (startup, env, fp, cf), pymain_run_stdin() (a nested-block exitcode, plus outer-scope cf, run), and pymain_repl() (cf, res). pymain_get_importer(), pymain_sys_path_add_path0(), pymain_run_module(), pymain_run_interactive_hook(), pymain_run_python(), Py_RunMain(), and pymain_main() were inspected and found to already declare every local before the first statement in their block (including two back-to-back declarations in pymain_run_python()'s else if (!config->safe_path) block, which is valid C89 since no statement separates them) — left untouched, consistent with "only the sites that actually need it."

A note on scope, since it matters for what this slice does and does not claim: several of the hoisted declarations are of type PyCompilerFlags or are assigned via _PyStatus_OK(), both of which are initialized through C99 compound-literal macros (_PyCompilerFlags_INIT, _PyStatus_OK()). Hoisting the declaration is still the correct, necessary C89 fix for the mixed-declaration violation at each of those sites — it eliminates that specific error class everywhere it appeared in main.c, as confirmed below — but the compound-literal initializer itself is a separate C99 feature VC6 does not support at any declaration position. That is a new, distinct blocker, not a residue of this slice's fix; see "Current first-blocker evidence" below, where it is documented rather than papered over.

Verified with the same two-probe approach used for the earlier slices:

scripts/fixtures/vc6_decl_order_smoke.c (new) — a minimal, self-contained fixture (no CPython headers) that exercises, in isolation, the shape of every hoist pattern used in main.c: a bare hoist above an early return, a side-effecting-initializer hoist, a hoisted pair where fixing the first declaration would otherwise turn an immediately-following second declaration into a new violation, a nested-block hoist, and the platform-conditional same-name/different-type hoist. Kept separate from main.c itself so it keeps guarding the general transformation shape even as main.c changes upstream:
```
$ bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_decl_order_smoke.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : scripts/fixtures/vc6_decl_order_smoke.c
...
vc6_decl_order_smoke.c

== cl.exe exit status: 0 ==
```
No errors, no warnings.
cpython/Modules/main.c itself, the same real core translation unit used throughout this document. Every C2146/C2065/C2275 declaration-position error is gone; the previous 29-error-line run is now down to 8 error lines, all a different error code (C2059) at a different root cause (compound literals / designated initializers, not declaration position — see "Current first-blocker evidence" below for the full transcript).

Both probes are covered by 5 new checks added to scripts/vc6-probe-core.test.sh (positive isolated-fixture compile, no-errors check, a negative deliberately-broken-fixture check, its error-surfaced check, and a check that Modules/main.c's output no longer contains any declaration-position error — C2146, an "undeclared identifier" C2065, or a type-as-expression C2275 — anywhere in its own body), bringing that file to 21 checks total. Run: bash scripts/vc6-probe-core.test.sh. Last run: all 21 checks ok (wine + MSVC600 available in this environment). scripts/vc6-probe.test.sh was re-run after this change and still passes (all 6 checks ok), confirming the public-header probe is unaffected. The patch's reproducibility was re-verified against a genuinely pristine tree (a fresh cp -a cpython /tmp/cpython_pristine_check && git -C /tmp/cpython_pristine_check checkout -- ., not a stash of the working checkout): git apply --check from inside that pristine copy exits 0, and after applying, diff -rq between the patched pristine copy and this project's actual cpython/ working tree (excluding .git) reports no differences. The temporary copy was removed afterward; nothing under cpython/ or compat/ was affected by this verification step.

Compound-literal / designated-initializer slice

Scope: the 8 C99 compound-literal/designated-initializer call sites inside Modules/main.c's own body only — no header-level macro change, and no other file touched. This is the follow-on to the "Modules/main.c declaration-order slice" above, addressing exactly the blocker that slice left recorded as out of scope: VC6 (a pre-C99 compiler) supports neither C99 compound literals ((PyStatus){...}) nor C99 designated initializers ({ .field = value, ... }), at any position in a block, regardless of where the destination variable is declared.

Three distinct patterns were responsible, each fixed a different way, all still uncommitted in compat/msvc600/cpython-3.11.16-vc6-headers.patch:

status = _PyStatus_OK(); (1 site, pymain_init()). Rather than reimplementing the macro's field assignment by hand, this is replaced with status = PyStatus_Ok(); — the existing public API function declared in Include/cpython/initconfig.h (PyAPI_FUNC(PyStatus) PyStatus_Ok(void);) and defined in Python/initconfig.c as PyStatus PyStatus_Ok(void) { return _PyStatus_OK(); } — i.e. it returns the exact value the macro would have produced, by construction, not by re-derivation. This needed no header change: the function was already declared and part of the public ABI; main.c just wasn't calling it. Behavior is identical for every compiler, VC6 or otherwise — main.c now calls a function that itself still uses the compound-literal macro internally in Python/initconfig.c, which is fine because Python/initconfig.c is not part of this slice's compile-only probe (no link is attempted or claimed) and is explicitly the next kind of file this port will need to work through, not something silently skipped.
cf = _PyCompilerFlags_INIT; (5 sites: pymain_run_command(), pymain_run_file_obj(), pymain_run_startup(), pymain_run_stdin(), pymain_repl()). No public-API equivalent exists for this one (unlike PyStatus_Ok()), so each site is replaced with the field-by-field assignment the macro itself expands to: cf.cf_flags = 0; cf.cf_feature_version = PY_MINOR_VERSION;. PyCompilerFlags is a two-field plain struct (Include/cpython/compile.h), and cf was already declared (bare, no initializer) at the top of its enclosing block by the prior declaration-order slice, so this is a pure compound-literal-to-assignment substitution with no interaction with declaration position.
_PyArgv args = { .argc = argc, ... }; (2 sites: Py_Main(), Py_BytesMain()). No macro is involved here, just a plain C99 designated-initializer aggregate initializer on a local variable declaration. Replaced with a bare declaration followed by one assignment per field (args.argc = argc; args.use_bytes_argv = 0; ...); field order in the replacement does not matter, unlike the initializer list it replaces, since each is now an independent assignment statement.

Every other compiler is unaffected: PyStatus_Ok() is a normal function call (no macro expansion difference for any compiler), and hoisting a designated-initializer aggregate into field-by-field assignment, or a compound-literal assignment into field-by-field assignment, changes no value, no evaluation order, and no code path for any compiler that already accepted the C99 form — it is strictly a syntax substitution for an identical runtime effect.

Verified with the same two-probe approach used for the earlier slices:

scripts/fixtures/vc6_compound_literal_smoke.c (new) — includes the real Python.h/pycore_initconfig.h (like vc6_mixed_decls_smoke.c, since PyStatus, PyCompilerFlags, and _PyArgv are real CPython types, not reproducible in isolation the way the atomics/stdbool fixtures are) and exercises all three replacement patterns:
```
$ bash scripts/vc6-probe-core.sh scripts/fixtures/vc6_compound_literal_smoke.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : scripts/fixtures/vc6_compound_literal_smoke.c
...
vc6_compound_literal_smoke.c

== cl.exe exit status: 0 ==
```
No errors, no warnings.
cpython/Modules/main.c itself, the same real core translation unit used throughout this document. Every C2059 compound-literal/ designated-initializer error is gone — the previous 8-error-line run is now 0 error lines, and the probe reports cl.exe exit status: 0:
```
$ bash scripts/vc6-probe-core.sh
== MSVC600 Py_BUILD_CORE compile probe ==
source : cpython/Modules/main.c
prefix : /home/ubuntu/.wine-win9xport

Setting environment for using Microsoft Visual C++ tools.
main.c
...
== cl.exe exit status: 0 ==
```
(The only other output is MSVC600's standard informational NOTE: about WINVER 0x0500 being a beta-era SDK combination, present on every probe run in this environment, not new to this slice and not an error or warning.) This is a compile-only (/c) result for one translation unit — scripts/vc6-probe-core.sh never invokes the linker (see its own header comment) — not a claim that Modules/main.c links, that pythoncore/python.exe builds, or that anything runs on Windows 9x.

Both probes are covered by 6 new checks added to scripts/vc6-probe-core.test.sh (positive isolated-fixture compile, no-errors check, a negative deliberately-broken-fixture check, its error-surfaced check, a check that Modules/main.c's output no longer contains any C2059 compound-literal/designated-initializer error anywhere in its own body, and a new end-to-end check that the Modules/main.c probe itself now exits 0), bringing that file to 27 checks total. Run: bash scripts/vc6-probe-core.test.sh. Last run: all 27 checks ok (wine + MSVC600 available in this environment). scripts/vc6-probe.test.sh was re-run after this change and still passes (all 6 checks ok), confirming the public-header probe is unaffected. The patch's reproducibility was re-verified against a genuinely pristine tree (a fresh cp -a cpython /tmp/cpython_pristine_check && git -C /tmp/cpython_pristine_check checkout -- ., not a stash of the working checkout): git apply --check from inside that pristine copy exits 0, and after applying, diff -rq between the patched pristine copy and this project's actual cpython/ working tree (excluding .git) reports no differences. The temporary copy was removed afterward; nothing under cpython/ or compat/ was affected by this verification step.

Next blocker: `Python/pylifecycle.c`

After the PyRuntime section slice, the same real core probe was re-run:

$ bash scripts/vc6-probe-core.sh cpython/Python/pylifecycle.c
== MSVC600 Py_BUILD_CORE compile probe ==
source : cpython/Python/pylifecycle.c
...
cpython\Python\pylifecycle.c(112) : error C2059: syntax error : '.'
cpython\Python\pylifecycle.c(112) : error C2059: syntax error : ','
cpython\Python\pylifecycle.c(130) : error C2059: syntax error : '{'
cpython\Python\pylifecycle.c(189) : error C2143: syntax error : missing ';' before 'type'
cpython\Python\pylifecycle.c(190) : error C2143: syntax error : missing ';' before 'type'
...
cpython\Python\pylifecycle.c(1232) : fatal error C1003: error count exceeds 100; stopping compilation

== cl.exe exit status: 2 ==

The prior first blocker at Python/pylifecycle.c:91-92 is gone: VC6 no longer reports warning C4068: unknown pragma for #pragma section, and no longer rejects __declspec(allocate("PyRuntime")) with C2341. The new exact first blocker is now the _PyRuntimeState_INIT designated-initializer macro used by _PyRuntime itself (C2059: syntax error : '.' at the definition line, now line 112 after the VC6 guard was added). After that, the file still reaches the previously known broader C99 compound-literal/designated-initializer and C89 mixed-declaration wall, eventually hitting the compiler's 100-error cap. This slice did not attempt those broader pylifecycle.c rewrites.

Current first-blocker evidence

The previously recorded long long / C99 integer-suffix blocker is now resolved and verified. The uncommitted compat/msvc600/cpython-3.11.16-vc6-headers.patch (already applied to the cpython/ working tree) replaces bare long long with the existing PY_LONG_LONG macro in Include/longobject.h, Include/pythread.h, and Include/pyexpat.h, and introduces a PY_LL/PY_ULL literal-suffix macro pair (spelled i64/ui64 for _MSC_VER < 1300, i.e. VC6) in PC/pyconfig.h and Include/pyport.h, used in place of raw 123LL/123ULL literals in Include/pythread.h. With this patch applied, the full public header stack compiles cleanly:

$ bash scripts/vc6-probe.sh
== MSVC600 compile probe ==
source : cpython/Programs/python.c
prefix : /home/ubuntu/.wine-win9xport

Setting environment for using Microsoft Visual C++ tools.
python.c

== cl.exe exit status: 0 ==

cpython/Programs/python.c (#include "Python.h" plus a wmain/main stub) now compiles to build/vc6-probe/python.obj (verified present, 7115 bytes) with exit status 0. This exercises the entire public Include/*.h surface reachable from Python.h, not just pyport.h.

The pycore_atomic.h/intrin.h blocker, the pycore_interp.h/ <stdbool.h> blocker, and the mixed-declarations blocker in pycore_code.h/pycore_dict.h/pycore_list.h/pycore_call.h described in earlier revisions of this document are all now resolved; see "Atomics slice", "stdbool slice", and "Mixed-declarations header slice" above for full detail. Probing the same real core translation unit (cpython/Modules/main.c, which needs Include/internal on the include path and Py_BUILD_CORE defined — both required unconditionally by every pycore_*.h header) now gets past all of CPython's internal headers reachable from its #include chain with no header-level error at all, and the compiler proceeds into Modules/main.c's own body — where it hits a new wall, spread across nearly the entire 743-line file:

$ bash scripts/vc6-probe-core.sh
== MSVC600 Py_BUILD_CORE compile probe ==
source : cpython/Modules/main.c
...
cpython\Modules\main.c(44) : error C2275: 'PyPreConfig' : illegal use of this type as an expression
cpython\Modules\main.c(44) : error C2146: syntax error : missing ';' before identifier 'preconfig'
cpython\Modules\main.c(44) : error C2065: 'preconfig' : undeclared identifier
...
cpython\Modules\main.c(52) : error C2275: 'PyConfig' : illegal use of this type as an expression
...
cpython\Modules\main.c(215) : error C2275: 'PyObject' : illegal use of this type as an expression
...
cpython\Modules\main.c(253) : error C2275: 'PyCompilerFlags' : illegal use of this type as an expression
...
== cl.exe exit status: 2 ==

(29 distinct error source lines total in that run, spanning lines 44 through 734 of main.c — effectively the whole file — across roughly a dozen separate functions/blocks.)

This mixed-declarations pattern inside Modules/main.c's own body is now resolved and verified; see "Modules/main.c declaration-order slice" above for full detail. With that fix applied, the same probe now gets past every declaration-position error and hits a new, different, and out-of-scope-for-that-slice blocker:

$ bash scripts/vc6-probe-core.sh
== MSVC600 Py_BUILD_CORE compile probe ==
source : cpython/Modules/main.c
...
cpython\Modules\main.c(71) : error C2059: syntax error : '{'
cpython\Modules\main.c(256) : error C2059: syntax error : '{'
cpython\Modules\main.c(366) : error C2059: syntax error : '{'
cpython\Modules\main.c(448) : error C2059: syntax error : '{'
cpython\Modules\main.c(531) : error C2059: syntax error : '{'
cpython\Modules\main.c(564) : error C2059: syntax error : '{'
cpython\Modules\main.c(748) : error C2059: syntax error : '.'
cpython\Modules\main.c(760) : error C2059: syntax error : '.'

== cl.exe exit status: 2 ==

Down from 29 error lines to 8. Every one of these is the same new root cause, unrelated to declaration position: a C99 compound literal, optionally with designated initializers, neither of which VC6 (a pre-C99 compiler) supports at all, at any position in a block. Two distinct macros/patterns are responsible:

main.c:71, 256, 366, 448, 531, 564 — six sites assigning PyCompilerFlags cf = _PyCompilerFlags_INIT; (now cf = _PyCompilerFlags_INIT; after the declaration-order fix) or status = _PyStatus_OK();. _PyCompilerFlags_INIT and _PyStatus_OK() are defined in Include/cpython/compile.h and Include/internal/pycore_initconfig.h respectively as C99 compound literals with designated initializers, e.g.:
```
#define _PyStatus_OK() \
    (PyStatus){._type = _PyStatus_TYPE_OK,}
#define _PyCompilerFlags_INIT \
    (PyCompilerFlags){.cf_flags = 0, .cf_feature_version = PY_MINOR_VERSION}
```
(PyStatus){...} is a compound literal (C99 §6.5.2.5); ._type = ... inside it is a designated initializer (C99 §6.7.8). VC6 recognizes neither construct and reports the same C2059: syntax error : '{' for every one, regardless of whether the assignment is the first statement in its block or not — hoisting the declaration (already done) cannot fix this, because the problem is the initializer expression's syntax, not where the variable is declared.
main.c:748, 760 — the two _PyArgv args = { .argc = argc, ... }; aggregate initializations in Py_Main()/Py_BytesMain(), which use plain C99 designated-initializer syntax (no compound-literal macro involved, just { .field = value, ... } directly in a local variable's initializer) for the same reason: VC6 predates C99 designated initializers entirely.

This is a distinct C99 language-feature gap from mixed declarations, narrower in one sense (it doesn't force auditing every block in the file the way declaration-position did) but not fixable by moving code around: the fix, when attempted, will need to replace each compound-literal initializer with explicit field-by-field assignment statements (e.g. cf.cf_flags = 0; cf.cf_feature_version = PY_MINOR_VERSION;) or an equivalent non-compound-literal C89 construct, and — for _PyStatus_OK() / _PyCompilerFlags_INIT specifically — probably wants a header-level macro change (in pycore_initconfig.h / cpython/compile.h) analogous to the _Py_ATOMIC_VC6_X86 gating already used for pycore_atomic.h, rather than a per-call-site rewrite in every .c file that uses these macros, since they are used far more broadly than just Modules/main.c. No such fix is attempted here; it is out of scope for this narrowly-scoped declaration-order pass and is recorded as the next blocker. No link or runtime success is claimed at this or any earlier point in this document.

Update: this blocker (all 8 C2059 sites above) is now resolved for Modules/main.c, via a per-call-site rewrite rather than the header-level macro change speculated above — see "Compound-literal / designated-initializer slice" above for what was actually done and why the per-call-site approach (not the header macro change) was chosen for this narrow slice, and "Next blocker: Python/pylifecycle.c" above for where the same two blocker classes (mixed declarations and compound literals/designated initializers) recur next. This "Current first-blocker evidence" section is kept as a historical record of how the diagnosis proceeded; it is no longer the current state.

Larger blockers to plan for

Build-system mismatch: CPython 3.11's Windows build expects Visual Studio 2017-era MSBuild/vcxproj tooling. VC6 cannot consume the build as-is. A dedicated minimal VC6 makefile/project set is required.
Compiler language gap: CPython 3.11 source and headers use C99-era and later MSVC features that VC6 does not implement. Compatibility macros and carefully scoped source backports are required.
- VC6's C89-only parser rejects CPython's pervasive C99-style mixed declarations-and-code. The instances of this pattern in four Include/internal/pycore_*.h headers reachable from Modules/main.c are fixed (see "Mixed-declarations header slice" above), and the same pattern recurring throughout Modules/main.c's own body (29 error sites across roughly a dozen functions) is also now fixed (see "Modules/main.c declaration-order slice" above). Whether this pattern recurs in CPython's other .c sources has not yet been surveyed; each file would need its own probe-and-fix pass the same way main.c did, not a whole-tree sweep in one change.
- VC6 does not support C99 compound literals or designated initializers at all, independent of declaration position. The 8 sites of this pattern in Modules/main.c itself (_PyStatus_OK(), _PyCompilerFlags_INIT, and inline { .field = value } initialization in Py_Main()/Py_BytesMain()) are now fixed via a per-call-site rewrite, not a header-level macro change (see "Compound-literal / designated-initializer slice" above for why: a public-API function already existed for _PyStatus_OK(), and the other two patterns are cheap to rewrite in place without touching shared headers used far more broadly than main.c). _PyStatus_OK() and _PyCompilerFlags_INIT are still used, unmodified, at many other call sites across CPython outside main.c — this fix is scoped to main.c only, as directed; a header-level VC6 branch (mirroring _Py_ATOMIC_VC6_X86) remains a live option if a future slice finds the per-call-site approach doesn't scale to the rest of the codebase. The same two patterns (mixed declarations and compound literals) both recur in Python/pylifecycle.c, the next core translation unit in main.c's own call chain; see "Next blocker: Python/pylifecycle.c" above. Not yet fixed there.
Win9x API gap: CPython 3.11's Windows layer assumes NT-family Unicode, synchronization, process, filesystem, and networking APIs. Windows 98 has no wide-character file APIs and lacks multiple newer kernel APIs.
Runtime/library gap: SSL, SQLite, ctypes, multiprocessing, asyncio, Unicode filesystem behavior, and parts of subprocess will need explicit feature gates or Win9x-specific implementations.
Validation gap: final success requires booting the built executable on Windows 98 SE; Wine compilation alone is not proof of Win9x runtime compatibility.

Recommended next implementation slice

Do not attempt the complete CPython solution yet. The public header surface compiles; Include/internal/pycore_atomic.h compiles for VC6/_M_IX86 (see "Atomics slice" above); Include/internal/pycore_interp.h's <stdbool.h> include now resolves via the project-local compat/msvc600/stdbool.h shim (see "stdbool slice" above); the C99 mixed-declarations pattern in the four pycore_*.h headers reachable from Modules/main.c is fixed (see "Mixed-declarations header slice" above); that same pattern inside Modules/main.c's own body is fixed (see "Modules/main.c declaration-order slice" above); and the C99 compound-literal/designated-initializer pattern inside Modules/main.c's own body is now also fixed (see "Compound-literal / designated-initializer slice" above). cpython/Modules/main.c now compiles with cl.exe exit status 0 under scripts/vc6-probe-core.sh — no errors, no warnings — a compile-only (/c) result for this one translation unit; no link or runtime claim is made.

The next blocker is still Python/pylifecycle.c, the next core translation unit in main.c's own call chain (via Py_InitializeFromConfig()), but it has advanced past the VC6-incompatible PyRuntime section pragma. See "Next blocker: Python/pylifecycle.c" above for the current probe transcript. It now hits the same two already-solved blocker classes recurring at greater scale (mixed declarations, compound literals/designated initializers), plus enough sites of both to hit the compiler's 100-error cap before the whole file is seen, so the true scope is not yet known. Recommended next steps:

Continue with Python/pylifecycle.c by applying the same two mechanical transforms already validated on Modules/main.c — hoist mid-block declarations (declaration-order slice) and replace compound-literal/

Latest revision (`mathmodule.c` guarded VC6 `cbrt` fallback slice)

Diagnostic-only confirmation of Win32 loader-search constants frontier

Date: 2026-09-25 02:50 UTC

Before probing, read PORT_STATUS.md, README.md, and the active-profile reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Verified CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The outer checkout already had modifications to this status, the generated compatibility patch, and the frontier regression script; the nested CPython checkout already had extensive local port edits. Preserved all existing state. No reset, clean, stash, discard, commit, push, or publication occurred.

Attempted the requested single focused coding-agent delegation for read-only frontier review, but the delegation tool failed before launch because the runtime lacks the required anthropic package. No child ran and no independent review is claimed. Since the actual frontier is an unresolved Win9x-visible API-contract choice, no implementation delegation or source edit was appropriate; this run is diagnostics-only.

Forced a fresh MSVC600 source-list probe. _blake2/blake2s_impl.c still compiles, as do 39 of 40 sources. The first stable blocker is unchanged: five C2065 diagnostics at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. They are exported as Windows os constants; inventing fallback values or omitting exports would alter the Win9x-visible API contract. Later C89 diagnostics begin at line 16173 and remain separate. No compatibility behavior was guessed or changed.

Files changed by this run: PORT_STATUS.md only. No CPython source, test, or compatibility patch was modified.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; preserved pre-existing outer and nested modifications; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; `_blake2/blake2s_impl.c` compiled; 39/40 sources compiled. First errors are the five C2065 loader-search constants at `posixmodule.c(15856)`–`(15860)`; later C89 diagnostics begin at 16173.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\home\ubuntu\Organized\Legacy-Ports\Projects\python-win9x\MSVC600\VC98\Bin\VCVARS32.BAT && cl'`	0; banner `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested whitespace check passed, generated patch reproduces full nested diff byte-for-byte, and non-generated outer diff check passed.

This is compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next step: resolve and document intended Win9x os API behavior for the five Windows-7-era loader-search constants, then add a focused failing regression test before any source change. Keep later C89 diagnostics separate.

Latest revision (diagnostic-only forced compiler frontier confirmation)

Date: 2026-09-25 15:15 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before acting. Preserved the pre-existing outer modifications to this status, the compatibility patch, and the frontier regression script, along with all nested CPython edits. The nested checkout remains detached at CPython v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

The _blake2/blake2s_impl.c compile state is still true, but it is not the active frontier: a forced fresh source-list probe compiled 39 of 40 listed sources, including _blake2/blake2s_impl.c. The first stable blocker remains five C2065 undeclared identifiers in posixmodule.c(15856)–(15860): LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. These are exported as _LOAD_LIBRARY_SEARCH_* integer constants by the Windows os module. Later C89 errors begin at posixmodule.c(16173) and are separate. Since deciding whether to expose fallback values or suppress exports changes the Win9x-visible API contract, and the available evidence does not establish that intended behavior, this run made no source/test/patch implementation and delegated no coding agent. This is compiler-probe progress only.

Files changed in this run: PORT_STATUS.md only. Existing compatibility work remains preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch`	0; outer checkout already had modifications to `PORT_STATUS.md`, `compat/msvc600/cpython-3.11.16-vc6-headers.patch`, and `scripts/vc6-probe-pythoncore-frontier.test.sh`.
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; existing nested edits preserved; detached at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0. `_blake2/blake2s_impl.c` compiled. First stable errors are the five C2065 loader-search identifiers at `posixmodule.c(15856)`–`(15860)` above; later C89 diagnostics start at 16173.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed.
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff passes whitespace checks and the generated compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff passes whitespace check.

No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: establish the intended Win9x-visible behavior/API contract for the five loader-search constants from authoritative API evidence before writing a focused failing test and making any source change. Keep the later C89 diagnostics separate.

Latest revision (forced fresh VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-25 17:18 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and nested modifications. CPython remains detached at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Re-forced the full source-list probe before deciding whether to continue the earlier _blake2/blake2s_impl.c sequence. That file still compiles, but is not the current frontier: 39/40 listed sources compile. First stable blocker remains five C2065 undeclared identifiers in posixmodule.c(15856)–(15860): LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. These are exported as _LOAD_LIBRARY_SEARCH_* constants by the Windows os module initialization. Arbitrary fallback values or suppressing those exports would determine Win9x-visible API behavior, still not established by available evidence. Therefore this run was diagnostic-only; no source/test edits or coding-agent delegation were appropriate. Separate C89 diagnostics begin at line 16173 and are not addressed.

Files changed by this run: PORT_STATUS.md only. Existing work in the compatibility patch, regression script, and detached CPython checkout was preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git rev-parse HEAD && git remote -v`	0; outer pre-existing changes remain; baseline checkout untouched.
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && rg -n -C 4 'LOAD_LIBRARY_SEARCH_(DEFAULT_DIRS	APPLICATION_DIR
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0. `_blake2/blake2s_impl.c` compiles. First errors are the five C2065 diagnostics above; separate C89 diagnostics begin at line 16173.

Compiler-probe progress only. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: obtain authoritative API evidence establishing the intended Win9x behavior for these five exported constants; then add a focused failing regression test before any source change. Keep later C89 diagnostics separate.

Latest revision (forced frontier re-probe; loader-search constants remain first blocker)

Date: 2026-09-26 03:34 UTC

Before probing, read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing work: outer modifications to this status, the generated compatibility patch, and the frontier regression script; detached cpython/ checkout remains locally modified at baseline tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. No reset, clean, stash, discard, commit, push, or publication occurred.

Forced a fresh source-list probe to test whether the recorded _blake2/blake2s_impl.c frontier was still active. It is not: the file compiles, and 39/40 listed sources compile. First stable blocker is five C2065 errors in posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later C89 diagnostics begin at posixmodule.c(16173) and are a distinct family. Since the first blocker concerns Win9x-visible os constants whose intended API contract is not established, no implementation or coding-agent delegation was appropriate; no source/test edit was made. This is diagnostic-only.

Files changed this run: PORT_STATUS.md only. All prior CPython source edits, test edits, and generated compatibility patch were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git rev-parse HEAD`	0; outer `main...gitea/main`; pre-existing modifications remain in `PORT_STATUS.md`, compatibility patch, and frontier test.
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; detached, locally modified checkout at `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; total=40, compiled=39, cached=0, skipped=0. `_blake2/blake2s_impl.c` compiled. First five diagnostics are C2065 for the loader-search constants listed above; next distinct C89 family starts at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested whitespace check passed and generated patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':!compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; non-generated outer diff whitespace check passed.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: resolve the intended Win9x os API contract for the five exported loader-search constants using authoritative Windows API evidence; then add a focused failing regression before any source change. Keep subsequent C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 12:38 UTC

Forced a fresh compiler probe. It compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later separate C89 diagnostics start at line 16173 (PyObject ScandirIteratorType), followed by line 16220 (PyObject list) and 16224 (trace). No source/test implementation was safe because the Win9x-visible contract for the five exported constants remains unresolved; this run was diagnostic-only.

Files changed by this run: PORT_STATUS.md only. Existing changes to the generated compatibility patch, frontier regression script, and nested CPython sources were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; existing modifications preserved; baseline/tag unchanged.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, `_blake2/blake2s_impl.c` compiled; first diagnostics are the five C2065 constants above; later C89 diagnostics begin at `posixmodule.c(16173)`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check`	0.
`cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; generated compatibility patch matches the complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants using authoritative API evidence; then add a focused failing test before any source change. Keep later C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-27 14:42 UTC

Read PORT_STATUS.md, README.md, and the active-profile legacy-toolchain reference before probing. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c state remains true, but it is not the active frontier. No implementation subagent or source change was appropriate: the first blocker is still the unresolved Win9x-visible contract for the five exported loader-search constants.

Forced a fresh VC6 source-list probe: 39/40 listed sources compiled (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. The first stable diagnostics remain C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), followed by line 16220 (PyObject list) and line 16224 (trace); these are separate and were not modified.

Files changed by this run: PORT_STATUS.md only. Existing edits to the generated compatibility patch, frontier regression script, and nested CPython source were preserved.

Exact commands and results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match`	0; existing modifications preserved; baseline/tag unchanged.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled; `_blake2/blake2s_impl.c` compiled; first C2065 errors are the five loader-search constants above; subsequent C89 diagnostics begin at line 16173.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested whitespace check passed, generated patch still matches the complete nested diff byte-for-byte, and outer non-generated diff check passed before this status entry.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence; then write a focused failing test before changing source. Keep subsequent C89 diagnostics separate.

Latest revision (scheduled forced VC6 frontier confirmation; loader-search constants remain blocker)

Date: 2026-09-28 07:12 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all existing outer and nested modifications; no reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. A forced fresh source-list probe confirms _blake2/blake2s_impl.c compiles; it is not the active frontier. The first blocker remains five undeclared loader-search constants in posixmodule.c; because they are exported os constants and the Win9x-visible contract remains unresolved, this run made no speculative source/test changes and did not delegate implementation.

The probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89 diagnostics begin at line 16173 (PyObject ScandirIteratorType), then line 16220 (list) and 16224 (trace); left untouched.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch, regression tests, and nested CPython edits remain preserved.

Exact commands/results:

Command	Exit/result
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled. First stable diagnostics are the five C2065 errors above; distinct later C89 diagnostics follow.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all wine cmd /c 'call Z:\home\ubuntu\Organized\Legacy-Ports\Projects\python-win9x\MSVC600\VC98\Bin\VCVARS32.BAT && cl'`	0; `Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff clean, compatibility patch matches complete nested diff byte-for-byte, outer non-generated diff clean.
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: establish the intended Win9x-visible contract for the five exported loader-search constants from authoritative API evidence; then add a focused failing test before source changes. Keep later C89 diagnostics separate.

Latest revision (fresh forced frontier check; posixmodule remains first blocker)

Date: 2026-09-28 19:39 UTC

Read PORT_STATUS.md, README.md, and the active-profile CPython/Win9x/MSVC6 reference. Preserved all pre-existing work, including the extensive detached CPython edits and outer modifications; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c still compiles and is not the current frontier. A fresh forced probe reconfirmed the first stable blocker in posixmodule.c; the Win9x-visible contract for its five exported loader-search constants remains unspecified in project evidence, so no speculative implementation slice was made and no coding subagent was appropriate.

Fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct later C89-related diagnostics begin at line 16173 (ScandirIteratorType), then 16220 (list) and 16224 (trace); left untouched.

Files changed this run: PORT_STATUS.md only. No CPython source or test edits. Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && date -u '+%Y-%m-%d %H:%M UTC'`	0; existing changes preserved; baseline `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`; `2026-09-28 19:39 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; 39/40 compiled, zero cached; first stable diagnostics are the five C2065 constants above; subsequent separate C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch`	0; nested diff clean; tracked compatibility patch matches complete nested diff byte-for-byte.
`git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; outer non-generated diff check passed.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: resolve the intended Win9x-visible contract for the five exported constants from authoritative API evidence; then write a focused failing test before a narrowly scoped implementation. Keep subsequent C89 diagnostics distinct.

Latest revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 08:00 UTC

Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before probing. Preserved all existing outer and nested changes. No reset, clean, stash, discard, overwrite of unrelated work, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c remains successful but is not the active frontier. Forced fresh probe reconfirmed the first blocker in posixmodule.c; the Win9x API contract for the five exported loader-search constants is unresolved, so this was diagnostic-only and no coding subagent or implementation change was appropriate.

The probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics start at line 16173 (ScandirIteratorType), followed by errors at 16220 (list), 16224 (trace), and 16246; untouched.

Files changed this run: PORT_STATUS.md only. Existing compatibility patch changes, frontier test edits, and nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git -C cpython status --short --branch && date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline/tag unchanged; existing nested modifications preserved; `2026-09-29 08:00 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh forced probe compiled 39/40, zero cached; first diagnostics are the five C2065 loader-search constants above; separate C89 diagnostics follow. Full log: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/python-win9x-frontier-20260929-0800.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer diff checks passed; generated compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants; then write a focused failing test before any source edit. Keep later C89 blockers separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; loader-search constants remain first blocker)

Date: 2026-09-29 12:15 UTC

Read PORT_STATUS.md, README.md, and the project legacy-toolchain reference before probing. The reference is at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md; an initial lookup using the default-profile skill path failed (exit 1), then the active-profile reference was read. Preserved all existing work. No reset, clean, stash, discard, commit, push, or publication. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The recorded _blake2/blake2s_impl.c compile state is true, but that source is not the active frontier. Forced fresh probe confirms posixmodule.c remains the first blocker. Its Win9x-visible behavior for five exported loader-search constants remains unresolved, so this was diagnostic-only; no implementation subagent or speculative edit was appropriate.

Fresh probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Distinct subsequent C89 diagnostics begin at line 16173 (PyObject/ScandirIteratorType), then lines 16220 (PyObject/list), 16224 (trace and cascading errors), and 16246. None were changed.

Files changed this run: PORT_STATUS.md only. All existing outer changes and extensive nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch && git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match`	0; existing edits preserved; baseline remains `v3.11.16` / `41388c9cb160d0886d5ca00d2e6c878260a8a4549`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40, zero cached; first diagnostics are the five C2065 loader-search constants above; later C89 diagnostics remain.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites and syntax checks passed (`ALL TESTS PASSED`).
`git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch && git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested and outer whitespace checks passed; compatibility patch matches complete nested diff byte-for-byte.

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before a narrowly scoped source change. Keep the distinct later C89 blockers separate.

Latest revision (scheduled forced fresh VC6 frontier confirmation; posixmodule remains first blocker)

Date: 2026-09-30 02:41 UTC

Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before probing. Preserved all existing outer and nested changes; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. _blake2/blake2s_impl.c remains compilable but is not the active frontier. A forced fresh probe reconfirmed posixmodule.c as the first blocker. The intended Win9x-visible contract for its five exported loader-search constants remains unresolved; this was diagnostic-only, with no source/test edit or coding subagent.

The forced probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0), including _blake2/blake2s_impl.c. First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics begin at line 16173 (ScandirIteratorType), then 16220 (list), 16224 (trace), and 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer patch/test edits and all nested CPython modifications were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; pre-existing modifications preserved; baseline/tag unchanged; timestamp `2026-09-30 02:41 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources; first stable errors are the five C2065 constants listed above; later C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; shell syntax and all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before any source edit. Keep later C89 diagnostics separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 06:52 UTC

Read PORT_STATUS.md, README.md, and python-3-win9x-msvc6.md before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Forced fresh probe confirms _blake2/blake2s_impl.c compiles and is not the active frontier. The first blocker remains five undeclared LOAD_LIBRARY_SEARCH_* constants in posixmodule.c; intended Win9x-visible API contract remains unresolved, so this was diagnostic-only with no source/test edits and no coding subagent.

The probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable errors are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate subsequent C89 diagnostics begin at line 16173 (ScandirIteratorType), followed by line 16220 (list), line 16224 (trace), and line 16246. No compatibility implementation was guessed.

Files changed this run: PORT_STATUS.md only. Existing modifications to the outer compatibility patch and frontier test, and all nested CPython changes, were preserved.

Exact commands/results:

Command	Exit/result
`date -u '+%Y-%m-%d %H:%M UTC'; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; git status --short --branch; git -C cpython status --short --branch`	0; timestamp `2026-09-30 06:52 UTC`; CPython tag/commit unchanged and all pre-existing modifications preserved.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh result 39/40 compiled, zero cached. First diagnostics are the five C2065 errors above; distinct later C89 diagnostics remain. Compiler output showed VC6 environment startup and source compilation; this is a compile probe only.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0; nested diff clean, generated patch matches complete nested diff byte-for-byte, outer non-generated diff clean.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before any narrow implementation. Keep later C89 diagnostics separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule blocker unchanged)

Date: 2026-09-30 08:53 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before probing. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Although _blake2/blake2s_impl.c remains in the successfully compiled portion, the recorded state is no longer the active frontier: the forced fresh probe still stops first at posixmodule.c. No source/test implementation or coding subagent was appropriate because the Win9x-visible contract for the five exported loader-search constants remains unresolved.

Probe compiled 39/40 listed sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics are C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), followed at lines 16220 (list), 16224 (trace), and 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Pre-existing outer patch/test modifications and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython status --short --branch && git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && date -u '+%Y-%m-%d %H:%M UTC'`	0; existing nested modifications preserved; baseline/tag unchanged; `2026-09-30 08:53 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh probe compiled 39/40 with zero cached sources; exact first stable errors are five C2065 identifiers listed above. Full output: `/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/frontier-cron-current.log`.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax validation and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0 for all; nested/outer whitespace checks passed and generated compatibility patch byte-matches complete nested diff.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported constants, then add a focused failing test before any narrow source change. Keep later C89 diagnostics separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 11:00 UTC

Read PORT_STATUS.md and README.md before probing. The referenced python-3-win9x-msvc6.md was not found in the active profile or project checkout; used the supplied porting instructions and prior status as the available reference. Preserved all pre-existing outer and nested modifications; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Forced fresh probe confirms _blake2/blake2s_impl.c compiles but is not the active frontier. First blocker remains five undeclared LOAD_LIBRARY_SEARCH_* constants in posixmodule.c; the Win9x-visible exported API contract remains unresolved, so no speculative implementation/test edit or coding subagent was appropriate.

Probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics start at line 16173 (ScandirIteratorType), then line 16220 (list), line 16224 (trace), and line 16246. They remain distinct and untouched.

Files changed this run: PORT_STATUS.md only. All pre-existing compatibility patch/test modifications and nested CPython edits were preserved.

Exact commands/results:

Command	Exit/result
`git -C cpython rev-parse HEAD && git -C cpython describe --tags --exact-match && git status --short --branch && git -C cpython status --short --branch && git -C cpython diff --check && cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; printf 'patch_cmp_exit=%s\\n' "$?"; date -u '+%Y-%m-%d %H:%M UTC'`	0; baseline/tag unchanged, all existing outer/nested modifications preserved, nested diff clean, compatibility patch matches complete nested diff byte-for-byte; timestamp `2026-09-30 11:00 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; forced fresh 39/40 compile; first stable errors are the five C2065 constants above, followed by separate C89 diagnostics.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).

Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before a narrow source change. Keep later C89 diagnostics separate.

Latest revision (scheduled forced fresh VC6 frontier recheck; posixmodule remains blocker)

Date: 2026-09-30 23:24 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and nested changes; no reset, clean, stash, discard, unrelated overwrite, commit, push, or publication. CPython remains detached at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. Forced fresh probing confirmed _blake2/blake2s_impl.c compiles and is not the current frontier. posixmodule.c remains the first blocker. The intended Win9x-visible contract for the five exported LOAD_LIBRARY_SEARCH_* constants remains unestablished; no source/test implementation or coding subagent was appropriate, so this run was diagnostic-only.

The forced fresh probe compiled 39/40 sources (total=40 compiled=39 cached=0 skipped=0). First stable diagnostics: C2065 at posixmodule.c(15856)–(15860) for LOAD_LIBRARY_SEARCH_DEFAULT_DIRS, LOAD_LIBRARY_SEARCH_APPLICATION_DIR, LOAD_LIBRARY_SEARCH_SYSTEM32, LOAD_LIBRARY_SEARCH_USER_DIRS, and LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR. Separate later C89 diagnostics begin at line 16173 (ScandirIteratorType), 16220 (list), 16224 (trace), and 16246; left untouched.

Files changed this run: PORT_STATUS.md only. Existing outer changes and all nested CPython changes were preserved.

Exact commands/results:

Command	Exit/result
`git status --short --branch; git -C cpython status --short --branch; git -C cpython rev-parse HEAD; git -C cpython describe --tags --exact-match; date -u '+%Y-%m-%d %H:%M UTC'`	0; all prior modifications preserved, baseline/tag unchanged; timestamp `2026-09-30 23:24 UTC`.
`WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh`	2; fresh compile-only probe compiled 39/40, zero cached; first stable diagnostics are the five C2065 errors above; later C89 diagnostics remain distinct.
`bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe-pythoncore-frontier.test.sh && bash scripts/vc6-probe.test.sh && bash scripts/vc6-probe-core.test.sh && bash scripts/vc6-probe-pathcch.test.sh && bash scripts/generate-getpath-frozen.test.sh && bash scripts/vc6-probe-stdint.test.sh`	0; syntax checks and all applicable regression suites passed (`ALL TESTS PASSED`).
`git -C cpython diff --check; cmp -s <(git -C cpython diff) compat/msvc600/cpython-3.11.16-vc6-headers.patch; git diff --check -- . ':(exclude)compat/msvc600/cpython-3.11.16-vc6-headers.patch'`	0 before this status update; nested/outer diff checks passed and generated compatibility patch matches the complete nested diff byte-for-byte.

Compiler-probe progress only. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution verified. Next frontier: establish authoritative intended Win9x behavior for the five exported loader-search constants, then add a focused failing test before a narrow source change. Keep later C89 diagnostics separate.

Latest revision (fresh VC6 probe; `_winapi.c` is the actual frontier)

Date: 2026-10-01 20:44 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16/MSVC6 reference before probing. Preserved all entry-state work in the outer repository and detached CPython checkout; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549. The older _blake2/blake2s_impl.c frontier is stale: a forced fresh source-list probe compiled it successfully and found _winapi.c as the actual blocker. No source/test implementation was made because the first missing names are part of the LCMapStringEx/locale-mapping path, whose Win9x-compatible behavior must be established rather than addressed by speculative constant definitions.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=69 compiled=68 cached=0 skipped=0. _blake2/blake2s_impl.c compiles. First stable _winapi.c diagnostics: C2065 for LCMAP_SORTHANDLE and LCMAP_HASH at line 1827. Subsequent distinct diagnostics include C89 declaration-order errors at lines 1832 onward and later missing SDK identifiers; no later cascade is treated as the first blocker. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1790887487-1598189-2410.log.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0. bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1: the established console type detection preserves control/cleanup order assertion failed; the _winapi regressions and the other listed checks, including the new console readall/Clinic check, passed. This pre-existing suite failure is not attributed to the probe or fixed in this diagnostic run.
git -C cpython diff --check -- Modules/_winapi.c && git diff --check -- scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress, not a linked pythoncore.dll/python.exe, Wine interpreter execution, or Windows 98 SE result. Compatibility patch synchronization remains unresolved. Next frontier: determine and document a valid Win9x-compatible replacement or explicit feature behavior for the LCMapStringEx locale-mapping path before editing; then address its C89 declarations in a separate test-first slice. Do not report a completed port.

Latest revision (_PyCode_GetExtra/_PyCode_SetExtra C89 declarations cleared; frontier advances)

Date: 2026-10-02 14:02 UTC

The recorded _blake2/blake2s_impl.c state was verified by a forced fresh probe: it compiles, but the actual first blocker is Objects/codeobject.c. One C89 declaration-order slice hoisted only locals in _PyCode_GetExtra and _PyCode_SetExtra, preserving validation, realloc, initialization, free callback, and assignment execution order. Added exact-body assertions to scripts/vc6-codeobject-c89.test.py.

Exact commands/results:

RED: python3 scripts/vc6-codeobject-c89.test.py cpython/Objects/codeobject.c — exit 1, expected _PyCode_GetExtra locals must be declared at function entry.
GREEN: same command — exit 0, codeobject C89 declarations and ownership order: PASS.
bash -n scripts/vc6-probe-pythoncore-frontier.sh scripts/vc6-probe-pythoncore-frontier.test.sh — exit 0.
bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; codeobject check passes, while two unrelated existing assertions fail: console type detection (console type lookup and cleanup order must remain unchanged) and numeric dispatch (ValueError: substring not found). No unrelated changes attempted.
Forced fresh probe before edit: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=80 compiled=79 cached=0 skipped=0. Initial first stable diagnostics were C2275/C2065 in _PyCode_GetExtra at lines 1399–1400, followed by declaration-order diagnostics in this file.
Forced fresh probe after edit (same command) — exit 2, total=80 compiled=79 cached=0 skipped=0. codeobject.c passes the former _PyCode_GetExtra/_PyCode_SetExtra diagnostics. The next first stable errors are C2275/C2146/C2065 for late Py_hash_t h4 at line 1830 and h5 at 1834; separate later declaration errors remain. The terminal returned the full diagnostic output directly; no stable saved-log path was provided.
git diff --check -- scripts/vc6-codeobject-c89.test.py and git -C cpython diff --check -- Objects/codeobject.c — exit 0. A baseline comparison confirmed source edits are confined to these two functions and existing test assertions are preserved.

Files changed by this slice: cpython/Objects/codeobject.c, scripts/vc6-codeobject-c89.test.py, and this status log. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: separately test-first hoist only Py_hash_t h4 and h5 in the functions at lines 1830/1834, preserving hash computation order. Keep the existing outer regression failures explicit; compatibility patch synchronization remains unresolved.

Latest revision (`PYLONG_FROM_UINT` C89 locals hoisted; frontier reaches long-long syntax)

Date: 2026-10-03 12:05 UTC

Read PORT_STATUS.md, README.md, and the loaded legacy-toolchain guidance before acting; the referenced on-disk CPython reference remains unavailable. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The previous status named PyLong_FromLong() as the next frontier, but fresh compiler evidence showed the line-364 declarations were emitted from the PYLONG_FROM_UINT macro invoked by PyLong_FromUnsignedLong(). PyLong_FromLong() already had its function locals declared at entry. Used one focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write) for a single test-first macro slice. Extended scripts/vc6-longobject-c89.test.py, observed expected RED before the source change, then hoisted only Py_ssize_t ndigits, INT_TYPE t, PyLongObject *v, and digit *p to the start of the macro's do block in cpython/Objects/longobject.c. Initializers became assignments at the previous evaluation points. Small-int fast return, digit-count loop, allocation/error path, value consumption/mutation, digit writes, and return order are unchanged. Independently inspected the complete nested diff: the macro is the only new nested source change in this slice; earlier uncommitted longobject.c edits are preserved.

Exact verification:

Forced-fresh MSVC600 probe before the slice: XDG_RUNTIME_DIR="$PWD/build/current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2, total=95 compiled=94 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The line-364 errors attributed to PyLong_FromLong() in the prior log were actually macro expansion diagnostics: late Py_ssize_t ndigits, INT_TYPE t, PyLongObject *v, and digit *p in PYLONG_FROM_UINT. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791028366-3708731-9a10.log.
RED: python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c — exit 1 before the source edit, expected AssertionError: PYLONG_FROM_UINT must declare ndigits, t, v, and p at do-block entry.
GREEN: same command after edit — exit 0; all five focused longobject checks passed, including macro declaration/evaluation/error order.
Applicable regression: MSVC600_ROOT=/tmp/pylong-uint-no-toolchain bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; regression run completed, with only the two known unrelated failures: console type detection/cleanup order and numeric dispatch (ValueError: substring not found). The live compiler integration check was intentionally skipped for this suite run; the separate forced-fresh probe below ran with the actual installed toolchain.
Independent forced-fresh post-change probe (same XDG_RUNTIME_DIR, WINEPREFIX, and VC6_FRONTIER_FORCE=1 command) — exit 2, total=95 compiled=94 cached=0 skipped=0. longobject.c passed the PYLONG_FROM_UINT macro declaration diagnostics. First diagnostics now occur at longobject.c(374) / (376): C2632, long followed by long is illegal in the PyLong_FromUnsignedLongLong signature and macro argument. Further longobject diagnostics (including C89 sites and missing 64-bit CRT names) remain separate. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791028867-3708731-dc50.log.
python3 scripts/vc6-longobject-c89.test.py cpython/Objects/longobject.c, nested git diff --check -- Objects/longobject.c, and outer git diff --check -- scripts/vc6-longobject-c89.test.py — exit 0.

Files changed by this slice: cpython/Objects/longobject.c, scripts/vc6-longobject-c89.test.py, and this status entry. This is compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: investigate the VC6 long long blocker at PyLong_FromUnsignedLongLong (including applicable compatibility typedef/macros and declarations) as its own evidence-backed slice; do not bundle later C89/CRT diagnostics. No commit or push.

Latest revision (_PyTypes_InitState status declaration hoisted; object.c frontier advances)

Date: 2026-10-05 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. The expected legacy reference path was absent; the active-profile copy was read at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, compatibility-patch regeneration, or publication. CPython remains detached at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded frontier was freshly rechecked with forced-fresh VC6/Wine compile. _blake2/blake2s_impl.c compiled; actual first blocker was _PyTypes_InitState() in cpython/Objects/object.c, late PyStatus status = _PyTypes_InitSlotDefs() at line 1906. Used one focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write). It added scripts/vc6-object-initstate-c89.test.py; the first run failed RED as intended on missing entry declaration. Then it hoisted only PyStatus status; to function entry and retained status = _PyTypes_InitSlotDefs() after the non-main-interpreter guard, preserving slot initialization and error handling. All prior dirty/untracked work was preserved.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=100 compiled=99 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2275/C2146/C2065/C2115 at object.c(1906) on the late PyStatus status declaration. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791162097-96506-7360.log.
TDD RED: python3 scripts/vc6-object-initstate-c89.test.py cpython/Objects/object.c — exit 1 with expected assertion that _PyTypes_InitState must declare status at entry.
GREEN plus applicable focused object regressions (new initstate test, object C89, richcompare, FunctionStr, NotImplemented, descrobject/classmethod, genericaliasobject) — exit 0 for every command. The test asserts entry declaration, exact single declaration, guard, original slot-definitions call assignment point, exception propagation, and return order.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. New source assertion and numerous checks pass; known unrelated console type detection/cleanup assertion and numeric dispatch helper (ValueError: substring not found) still fail.
Post-change forced-fresh probe (same command as pre-change) — exit 2; total=100 compiled=99 cached=0 skipped=0. The former PyStatus diagnostics at line 1906 are gone. First remaining errors are C2143/C2065 loop-declaration errors at object.c(2060) (for (size_t i=...)), followed by another loop declaration at line 2091 and dependent diagnostics. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791162455-96506-d5b0.log.
git diff --check -- scripts/vc6-object-initstate-c89.test.py and git -C cpython diff --check -- Objects/object.c — exit 0. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is claimed.

Files changed in this slice: cpython/Objects/object.c, scripts/vc6-object-initstate-c89.test.py, and this status entry. Compiler-probe progress only. Next frontier: fresh forced-fresh probe before editing, then TDD only the first for (size_t i=...) declaration family at object.c(2060); leave the separate line-2091 loop declaration untouched. No commit or push.

Latest revision (obmalloc default-allocator local hoisted; fresh VC6 frontier advances)

Date: 2026-10-05 12:11 UTC

Fresh forced-fresh VC6/Wine re-probe confirmed the recorded state: _blake2/blake2s_impl.c compiled and the first stable blocker was Objects/obmalloc.c(239), late PyMemAllocatorEx new_alloc in pymem_set_default_allocator(). One focused Codex CLI lane (codex-cli 0.153.4, authenticated, workspace-write; session 01a10bf3-21bf-7562-9c2e-2128573a0d08) followed TDD. Added scripts/vc6-obmalloc-default-allocator-c89.test.py, observed expected RED, then hoisted only new_alloc to function entry; the previous old_alloc handling, domain switch/assignments, allocator call, debug hook, and return ordering remain unchanged. The agent's preservation comparison confirmed prior local changes remained byte-identical.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First errors C2275/C2146/C2065 at obmalloc.c(239) on PyMemAllocatorEx new_alloc. Full log: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791201545-269604-c8a0.log.
TDD RED: python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c — exit 1; expected message new_alloc must be declared once without initializer at function entry.
GREEN and independent focused rerun: same command — exit 0; obmalloc default allocator C89 declaration and execution order: PASS. Existing tracemalloc positional-initializer test also passes: python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0.
Applicable suite: bash scripts/vc6-probe-pythoncore-frontier.test.sh > /tmp/obmalloc-lane-frontier.log 2>&1 — exit 1. Two existing unrelated failures remain: console type detection/cleanup order and numeric dispatch helpers. Live one-source integration test also ran and correctly reported a nonzero first-blocker status. Full 322-line output: /tmp/obmalloc-lane-frontier.log.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/obmalloc-default-allocator-post.log 2>&1 — exit 2; total=101 compiled=100 cached=0 skipped=0. obmalloc.c(239) declaration diagnostics are gone. Next diagnostics are C2059 on { at lines 244, 247, and 250 in the three new_alloc = (PyMemAllocatorEx)PY*_ALLOC; assignments; later separate declaration/type families remain untouched. Full log: build/cron-current/obmalloc-default-allocator-post.log.
git diff --check, nested git -C cpython diff --check -- Objects/obmalloc.c, focused tests — exit 0. Baseline tag/commit unchanged.

Files changed in this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-default-allocator-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh forced probe before editing, then address only the cast/initializer assignment family in pymem_set_default_allocator() with a distinct TDD test; preserve the verified declaration change and all subsequent blockers separately.

Latest run (RawStrdup frontier reconfirmed; implementation lane unavailable)

Date: 2026-10-06 UTC

Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved the existing dirty outer worktree and detached CPython modifications; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_RawStrdup() frontier was forced-fresh re-probed and remains accurate. _blake2/blake2s_impl.c compiled; Objects/obmalloc.c is the first failing translation unit. First stable diagnostics are C2143 at lines 697-698 on declarations following assert in _PyMem_RawStrdup(), followed by C2065 cascades for copy and size. The separate _PyMem_Strdup() declarations at lines 710-711 and subsequent obmalloc diagnostics remain untouched.

One focused coding-subagent delegation was attempted for only _PyMem_RawStrdup() and failed before startup because the Hermes runtime lacks the anthropic package and lazy installs are disabled. codex-cli 0.153.4 is installed, but no external CLI lane was started in the shared dirty checkout. No source or regression test was edited; this run is diagnostics-only.

Exact verification:

Forced-fresh VC6/Wine probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at obmalloc.c(697-698), followed by C2065 for copy and size. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791256009-486631-f230.log. The output invokes MSVC600 via Wine but has no standalone compiler-version banner.
Focused regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all four passed.
Applicable harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The obmalloc checks passed; two known unrelated failures remain: console type detection/cleanup order and numeric dispatch (ValueError: substring not found).
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- PORT_STATUS.md — exit 0. CPython tag and commit checks passed; baseline unchanged.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next: retry one focused TDD coding lane for _PyMem_RawStrdup() when delegation is available; keep _PyMem_Strdup() and later obmalloc diagnostics as separate slices.

Latest revision (_PyMem_RawStrdup C89 declarations hoisted; frontier advances)

Date: 2026-10-06 05:26 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython baseline remains v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c878260a8a4549.

The recorded _PyMem_RawStrdup() frontier was forced-fresh re-probed and remains current. _blake2/blake2s_impl.c compiled, followed by 95 other source files; Objects/obmalloc.c remained the first failing translation unit. Before the edit, VC6's first stable diagnostics were C2143 at lines 697-698, before the declarations following assert(str != NULL), followed by C2065 cascades for copy and size. One focused Codex CLI lane (codex-cli 0.153.4, session 01a10fa7-a787-7c40-a8ce-88b6fc719855, workspace-write) performed the one-slice TDD change. It added a focused assertion to the existing RawWcsdup regression script, observed the intended RED, then hoisted only size_t size and char *copy in _PyMem_RawStrdup(); initialization remains after the assert. Assert, strlen, allocation, NULL handling, memcpy, and return order are unchanged. _PyMem_Strdup() and all later obmalloc diagnostics were left untouched.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at obmalloc.c(697-698), then C2065 cascades for copy and size. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791263672-508466-3950.log.
TDD baseline focused test: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c — exit 0 before strengthening the test; the existing RawWcsdup C89 copy/empty/allocation-failure/overflow checks passed.
TDD RED: same focused test after adding the RawStrdup assertion and before the production edit — exit 1, expected assertion _PyMem_RawStrdup must use C89 declarations and preserve operation order.
TDD GREEN and focused regressions: python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all four passed.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1. The new and other obmalloc checks passed. Two known unrelated failures remain: console type detection/cleanup order, and numeric dispatch (ValueError: substring not found). No suite-wide pass claimed.
Post-change forced-fresh probe (same command as pre-change) — exit 2; total=101 compiled=100 cached=0 skipped=0. The former RawStrdup diagnostics at lines 697-699 are gone. First remaining diagnostics are C2143 at obmalloc.c(713-714), followed by undeclared copy/size cascades in the separate _PyMem_Strdup() helper; distinct later obmalloc diagnostics remain untouched. Full output: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791264091-508466-5e00.log.
Scoped git diff --check -- scripts/vc6-obmalloc-rawwcsdup-c89.test.py, git -C cpython diff --check -- Objects/obmalloc.c, and CPython exact tag/commit checks — exit 0.

Files changed in this slice: cpython/Objects/obmalloc.c, scripts/vc6-obmalloc-rawwcsdup-c89.test.py, and this status entry. The outer worktree and detached CPython checkout retain their prior dirty/untracked state. This remains compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next frontier: freshly re-probe before edits, then use one TDD slice on only _PyMem_Strdup()'s C89 declaration family at obmalloc.c(713-714); leave the later allocator-map/API diagnostics separate.

Latest run (`allocate_from_new_pool` pool declaration hoisted; frontier advances)

Date: 2026-10-07 09:56 UTC

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-confirm" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — probe exit 2; total=101 compiled=100 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2146/C2065 at obmalloc.c(1889) on poolp pool; following pointer errors are cascades. Log: build/cron-current/cron-reprobe-current.log.
TDD RED: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c — exit 1; expected assertion that allocate_from_new_pool must declare pool without an initializer at function entry. The prior pymalloc_pool_extend assertion passed.
Focused GREEN and eight applicable obmalloc tests: python3 scripts/vc6-obmalloc-pool-extend-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-arena-map-mark-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-arena-map-is-used-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-allocator-name-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-default-allocator-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-rawwcsdup-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-setup-allocators-c89.test.py cpython/Objects/obmalloc.c && python3 scripts/vc6-obmalloc-tracemalloc-init-c89.test.py cpython/Objects/obmalloc.c cpython/Include/internal/pycore_pymem.h — exit 0; all checks passed. The RawWcsdup test includes C89 compile/runtime checks.
Applicable regression harness: bash scripts/vc6-probe-pythoncore-frontier.test.sh — exit 1; existing console type-detection/cleanup-order assertion and numeric-dispatch ValueError: substring not found remain. No harness-wide pass claimed.
Post-change forced-fresh probe (same options, runtime build/cron-current/runtime-post) — probe exit 2; total=101 compiled=100 cached=0 skipped=0; the former poolp pool diagnostics are gone. First remaining diagnostics now occur later in obmalloc.c at lines 1947-1952 (block bp, then poolp next in a separate function); further C89 declaration/type blockers follow. Log: build/cron-current/post-pool-entry.log.
git diff --check and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. Exact baseline tag/commit remain unchanged.

Latest run (`_PyObject_Calloc` locals hoisted for VC6; frontier advances)

Date: 2026-10-07 UTC

The recorded _PyObject_Calloc() frontier was freshly confirmed before edits with a forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled; first stable diagnostics were C2143 at obmalloc.c(2059) and (2061) on the late initialized nbytes and ptr, followed by C2065 cascades at (2062-2063). Hermes coding-subagent dispatch failed before startup because the Anthropic package is unavailable and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11735-95ee-78b1-ac52-9aef9b07138e) followed TDD: it added scripts/vc6-obmalloc-calloc-c89.test.py, verified the expected RED before changing production code, then hoisted only size_t nbytes and void* ptr to function entry and retained both assignments after the original assertion/calculation points. The assertion, allocation and zeroing behavior, fallback, accounting and return order are preserved. No neighboring function or later blocker was changed.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-recheck" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-reprobe-current.log 2>&1 — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics C2143 at obmalloc.c(2059) and (2061); C2065 ptr and nbytes at (2062-2063). Capture: build/cron-current/cron-reprobe-current.log.
TDD RED: python3 scripts/vc6-obmalloc-calloc-c89.test.py cpython/Objects/obmalloc.c — exit 1 before production edit with expected assertion _PyObject_Calloc must declare nbytes and ptr without initializers at function entry.
TDD GREEN and focused test: same command — exit 0, _PyObject_Calloc nbytes/ptr entry declarations and original operation order: PASS.
Applicable obmalloc regression suite: the new calloc test plus allocator-name, arena-map-is-used, arena-map-mark-used, default-allocator, pool-extend, RawWcsdup/allocated-blocks, setup-allocators, and tracemalloc-init tests — all exit 0. Exact commands and output were independently rerun; tracemalloc used the required header cpython/Include/internal/pycore_pymem.h. The Codex lane's first broad-loop invocation exited 1 because it omitted that required header; corrected invocations passed. Two erroneous header-path attempts also failed with FileNotFoundError and are not test passes.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-post-calloc" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/post-calloc.log 2>&1 — actual probe exit 2; total=101 compiled=100 cached=0 skipped=0. The former _PyObject_Calloc() diagnostics are gone. The first remaining diagnostic is C2143 at obmalloc.c(2083) for the late uint size in insert_to_usedpool(), followed by related late poolp next/prev errors at (2084-2085); later errors are cascades or distinct functions and untouched.
git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- scripts/vc6-obmalloc-calloc-c89.test.py — exit 0. Exact CPython tag/commit unchanged.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-calloc-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: fresh forced-fresh probe before any edits; if the first blocker remains insert_to_usedpool() at line 2083, handle only that declaration family in a separate TDD slice. Do not claim port completion.

Latest run (fresh probe confirms `pymalloc_free`; coding lane unavailable)

Date: 2026-10-07 23:10 UTC

The recorded insert_to_freepool() state was freshly re-probed. _blake2/blake2s_impl.c compiled, as did 99 source-list entries total; the first stable blocker has advanced to pymalloc_free() at cpython/Objects/obmalloc.c(2286), C2143 before the late pool declaration and C2065 pool at 2287. Later diagnostics include lastfree and downstream allocator functions; they are distinct and untouched. One focused coding-subagent attempt was required but failed before startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this was diagnostics-only; no code or regression test changed.

Exact verification:

Read-only discovery: git status --short --branch — exit 0; existing dirty/untracked files retained.
Forced-fresh MSVC600/Wine probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-this-run" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at obmalloc.c(2286), C2065 pool at (2287). Full capture: /home/ubuntu/.hermes/profiles/maxwell/cache/terminal-output/out-1791414381-1200760-2b10.log.
Coding delegation for the one focused pymalloc_free() TDD slice — failed before child startup: Anthropic package missing; lazy installs disabled. No edits made by child.
Applicable obmalloc regressions: chained all 11 scripts/vc6-obmalloc-*.test.py currently present, supplying cpython/Objects/obmalloc.c and cpython/Include/internal/pycore_pymem.h where required — exit 0; all 13 individual checks printed PASS (the pool-extend test covers three functions).
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git -C cpython diff --check -- Objects/obmalloc.c and git diff --check -- PORT_STATUS.md — exit 0.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: retry a single focused TDD coding lane for only the confirmed pymalloc_free() declaration family when delegation is available. Do not claim port completion.

Latest run (`pymalloc_free` C89 declarations hoisted; next blocker confirmed)

Date: 2026-10-08 01:22 UTC

The recorded pymalloc_free() frontier was freshly confirmed with forced-fresh MSVC600/Wine compilation: obmalloc.c(2286) C2143 before the late pool declaration, then C2065 pool at 2287. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a11915-6dd9-7242-b525-60e23eef616f) followed strict TDD. It added scripts/vc6-obmalloc-pymalloc-free-c89.test.py, observed expected RED before production edits, then hoisted only poolp pool and block *lastfree into the function-entry declaration block. Assignments remain at their original evaluation points after the Valgrind early-return and address-range/refcount checks. No control flow or pointer updates were changed. All pre-existing local changes were preserved; the coding lane did not edit this status file.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-cron" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/cron-frontier-reprobe.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics were C2143 at obmalloc.c(2286) and C2065 pool at (2287).
TDD RED: python3 scripts/vc6-obmalloc-pymalloc-free-c89.test.py cpython/Objects/obmalloc.c — exit 1 before production edits; expected assertion that pool and lastfree must be declared at function entry.
TDD GREEN: same command after edit — exit 0; entry declarations and the function's full relevant evaluation/control-flow sequence passed.
Focused obmalloc regression batch (all 12 scripts/vc6-obmalloc-*.test.py, with cpython/Include/internal/pycore_pymem.h supplied to the tracemalloc test) — exit 0; independently rerun by Hermes. All 12 test scripts exited 0; the pool-extend test validates three functions. RawWcsdup additionally passed its C89 compile/runtime checks.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-current/runtime-post-pymalloc-free" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current/post-pymalloc-free.log 2>&1 — probe exit 2; total=101 compiled=100 cached=0 skipped=0. The former pymalloc_free() diagnostics at 2286-2299 are gone. First remaining stable diagnostics are in later allocator/debug functions: C2275/C2065 at obmalloc.c(2628-2630) around debug_alloc_api_t api, uint8_t q, and size_t nbytes; subsequent diagnostics include other distinct debug allocator functions and allocator-statistics C89 declarations. Left untouched.
Scoped git diff --check -- scripts/vc6-obmalloc-pymalloc-free-c89.test.py and git -C cpython diff --check -- Objects/obmalloc.c — exit 0. Nested CPython baseline verified unchanged: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Files changed by this slice: cpython/Objects/obmalloc.c, new scripts/vc6-obmalloc-pymalloc-free-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: fresh forced-fresh probe before any new edit; if the recorded post-change frontier remains current, isolate only the first debug_alloc_api_t api C89 declaration family with its own TDD slice. Do not claim port completion.

Latest run (fresh `mutablemapping_update()` probe; coding lane unavailable)

Date: 2026-10-09 11:46 UTC

Read PORT_STATUS.md and README.md before acting. The requested legacy-toolchain reference references/python-3-win9x-msvc6.md is absent from the project checkout and could not be located under /home/ubuntu; no claims rely on its contents. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Exact CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded _blake2/blake2s_impl.c / mutablemapping_update() frontier was freshly confirmed before any edit using the forced-fresh MSVC600/Wine source-list probe. _blake2/blake2s_impl.c compiled. First stable blocker remains the late Py_ssize_t len declaration at Objects/odictobject.c(2299), followed by C2065 for len at (2300). One focused coding-agent delegation was attempted for this precise defect family with TDD/preservation constraints, but failed before child startup because the Anthropic package is missing and lazy installs are disabled. Per the coding-agent delegation workflow, no direct substitute implementation was made. No source or tests were changed; diagnostics-only.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261009-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009-current/pre-change-probe.log 2>&1 — actual probe exit 2; summary total=102 compiled=101 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: C2143 at Objects/odictobject.c(2299) and C2065 len at (2300). Capture: build/cron-20261009-current/pre-change-probe.log.
Focused coding-agent delegation for only the confirmed len declaration family — failed before child startup: missing anthropic package; lazy installs disabled. No child edits occurred.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/odictobject.c exited 0.
No source/test regressions were run because neither source nor tests changed. No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress only. Next frontier remains the late Py_ssize_t len declaration in mutablemapping_update(); retry the same narrow TDD slice when a coding agent can start. Do not claim port completion.

Latest run (`picklebuf_as_buffer` designated initializer; frontier advances)

Date: 2026-10-09 18:23 UTC

Read PORT_STATUS.md, README.md, and references/python-3-win9x-msvc6.md before acting. Preserved existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded picklebuf_raw() declaration family was already resolved in the preserved local state. A forced-fresh MSVC600/Wine source-list probe reconfirmed the current first blocker as C2059 at Objects/picklebufobject.c(142) on .bf_getbuffer; the distinct designated initializer at line 211 was also reported and left untouched. Native Hermes coding delegation failed before startup because the Anthropic package is unavailable and lazy installs are disabled. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a121e2-95d9-7f21-96b3-6a70b3c7c102) performed strict TDD. It added a focused C89 compile/runtime test that extracts the exact PyBufferProcs initializer, checks the actual header field order and both semantic mappings, and observed expected RED before the source edit. Only the two initializer entries were changed to positional initializers with field-name comments; bf_getbuffer and bf_releasebuffer mappings are preserved. The existing picklebuf_raw() test and all other pre-existing dirty/untracked files were byte-identical after the lane.

Exact verification:

Pre-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-20261009T1610" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/reprobe-20261009T1610.log 2>&1 — actual probe exit 2; summary total=103 compiled=102 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First blocker C2059 at picklebufobject.c(142); separate C2059 at (211). Captured in build/cron-20261009Tcurrent/reprobe-20261009T1610.log.
TDD RED: python3 scripts/vc6-picklebuf-buffer-c89.test.py cpython/Objects/picklebufobject.c — exit 1 before production edit; expected host C90 diagnostics on both designated entries (ISO C90 forbids specifying subobject to initialize). GREEN: same command after edit — exit 0, picklebuf_as_buffer C89 compile and both semantic field mappings: PASS.
Applicable picklebuf regressions: python3 scripts/vc6-picklebuf-buffer-c89.test.py cpython/Objects/picklebufobject.c && python3 scripts/vc6-picklebuf-raw-c89.test.py cpython/Objects/picklebufobject.c — exit 0; raw regression reports five validation/allocation-order cases passed.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261009Tcurrent/runtime-post-20261009T1620" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261009Tcurrent/probe-post-picklebuf-buffer.log 2>&1 — actual probe exit 2; summary remains total=103 compiled=102 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/picklebufobject.c compile past the changed initializer. Previous line-142 C2059 is gone; first remaining blocker is C2059 at line 211 (PyPickleBuffer_Type designated initializer), intentionally untouched. Capture: build/cron-20261009Tcurrent/probe-post-picklebuf-buffer.log.
git -C cpython diff --check -- Objects/picklebufobject.c and git diff --check -- scripts/vc6-picklebuf-buffer-c89.test.py — exit 0. CPython exact tag/commit unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/picklebufobject.c (only the two picklebuf_as_buffer entries), new scripts/vc6-picklebuf-buffer-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed interpreter port. Next: force-fresh probe before edits, then isolate only the remaining first blocker, PyPickleBuffer_Type designated initialization at line 211, in a separate TDD slice. Do not claim port completion.

Latest run (`set_table_resize()` C89 local declaration; frontier advances)

Date: 2026-10-10 UTC

Read this status, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was freshly forced-reprobed before editing. _blake2/blake2s_impl.c and Objects/rangeobject.c compiled; first stable blocker was Objects/setobject.c(244) C2143 at the late initialized size_t newsize, followed by C2065 newsize at line 245. A focused coding-subagent dispatch was attempted as required but failed before startup because the Anthropic package is unavailable and lazy installs are disabled. No child changes occurred. Implemented one narrow test-first slice locally: added a regression asserting that newsize is declared in the function declaration block and initialized at its original location after the assertion, then ran it RED before changing production. Moved only the declaration to the entry declarations and retained initialization/evaluation order.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010T071759Z-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T071759Z-reprobe/probe.log 2>&1 — actual probe exit 2; total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c and Objects/rangeobject.c compiled. First stable errors: C2143 at setobject.c(244), C2065 newsize at (245). Capture: build/cron-20261010T071759Z-reprobe/probe.log.
Coding subagent — failed before startup: missing anthropic package; lazy installs disabled. No child edits.
TDD RED: python3 scripts/vc6-setobject-table-resize-c89.test.py cpython/Objects/setobject.c before source edit — exit 1, expected assertion that newsize must be declared without initializer in the declaration block.
Focused GREEN: same command after edit — exit 0, set_table_resize C89 declaration and sizing order: PASS.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010T072321Z-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T072321Z-post/probe.log 2>&1 — actual probe exit 2; total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c and Objects/setobject.c compiled. The prior line-244/245 diagnostics are gone. First stable blocker advances within setobject.c to C2275/C2065 at line 779 (PyObject *list); later independent blockers remain at lines 956, 1033, 1038, 1778, 2017, 2179, and 2280. Capture: build/cron-20261010T072321Z-post/probe.log.
Scoped git -C cpython diff --check -- Objects/setobject.c and outer git diff --check -- scripts/vc6-setobject-table-resize-c89.test.py — exit 0. Exact nested CPython tag/commit verified unchanged.

Files changed by this slice: cpython/Objects/setobject.c (only declaration/assignment split in set_table_resize()), new scripts/vc6-setobject-table-resize-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next: forced-fresh probe before any further edit; if unchanged frontier state, isolate only the first blocker at setobject.c(779) using a focused TDD slice. Do not claim port completion.

Latest run (set iterator frontier confirmed; coding lane unavailable)

Date: 2026-10-10 09:28 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Initial worktree inventory showed 36 outer and 126 nested dirty/untracked paths; all were left intact.

The previously recorded setobject frontier was stale and was freshly checked with forced-fresh MSVC600/Wine compilation. _blake2/blake2s_impl.c compiled. The first stable blocker is setiter_reduce() in Objects/setobject.c: C2275 at line 779 for late PyObject *list, followed by C2065 list at the same line. Later independent diagnostics at lines 956, 1033, 1038, 1778, 2017, 2179, and 2280 are untouched. One focused coding-subagent lane was attempted for only this first blocker with preservation/TDD constraints, but failed before startup because the Anthropic package is unavailable and lazy installs are disabled. No production or test source was changed; no RED/GREEN or regression pass is claimed. This run is diagnostics-only.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261010T092855Z/runtime-reprobe" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T092855Z/probe-before.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: C2275 PyObject and C2065 list at Objects/setobject.c(779). Capture: build/cron-20261010T092855Z/probe-before.log.
Focused coding-agent delegation for exactly setiter_reduce()'s first C89 declaration blocker — failed before child startup: required anthropic package missing; lazy installs disabled. No child edits were applied.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. No source/test regression suite was run because no source or test changed.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: retry one focused TDD implementation lane for the confirmed setiter_reduce() declaration at line 779 when a coding provider can start; keep PySequence_List() after the incref and preserve the decref/error order. Then force-fresh probe again. Do not claim port completion.

Latest run (`frozenset_vectorcall()` C89 declarations; frontier advances)

Date: 2026-10-10 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved all pre-existing dirty and untracked content; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. The recorded _blake2/blake2s_impl.c compilation was freshly confirmed, but the recorded next frontier required reprobe: the actual first stable blocker was frozenset_vectorcall() in Objects/setobject.c, not the separately compiled blake2 source.

One focused Codex CLI lane (codex-cli 0.153.4, one-shot codex exec, workspace-write) followed strict TDD. The Hermes delegation API attempt did not start because the Anthropic package is absent and lazy installation is disabled; the available Codex CLI was used instead. The lane added scripts/vc6-setobject-frozenset-vectorcall-c89.test.py, observed expected RED before production changes (the entry declaration assertion failed), and then moved only nargs and iterable declarations to the function's initial declaration block. Their assignments remain at their original evaluation points after the keyword and positional checks. The lane's exact-source snapshot check reports all pre-existing dirty/untracked contents, both indexes, and PORT_STATUS.md unchanged apart from the authorized source/test edits. No unrelated source was changed.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261010T155705Z-blake2-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261010T155705Z-blake2-frontier/probe-before.log 2>&1 — actual probe exit 2; total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: C2275/C2146/C2065 at Objects/setobject.c(1034) for nargs; then C2275/C2065 at (1039) for iterable. Further distinct diagnostics at lines 1779, 2018, 2180, and 2281. Capture: build/cron-20261010T155705Z-blake2-frontier/probe-before.log.
TDD RED/GREEN and applicable regressions, as run by the coding lane: new vc6-setobject-frozenset-vectorcall-c89.test.py failed before edit with the expected initial-declaration assertion, then passed after edit. All four scripts/*setobject*.test.py tests passed; output explicitly includes setiter_reduce (8 cases) and set_table_resize PASS. git diff --check and git -C cpython diff --check passed. No regression failure reported.
Post-change forced-fresh command: same probe with XDG_RUNTIME_DIR="$PWD/build/cron-20261010T155705Z-blake2-frontier/runtime-post", output to build/cron-20261010T155705Z-blake2-frontier/probe-after.log — actual probe exit 2; total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The former diagnostics at lines 1034/1039 are gone and setobject.c compiles past frozenset_vectorcall(). First remaining stable errors advance to C2275/C2065/C2100 at Objects/setobject.c(1782) (key/it); later blockers remain at lines 2021, 2183, and 2284. Capture: build/cron-20261010T155705Z-blake2-frontier/probe-after.log.
CPython tag/commit checked before change and unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified.

Files changed by this slice: cpython/Objects/setobject.c (only declarations/assignments in frozenset_vectorcall()), new scripts/vc6-setobject-frozenset-vectorcall-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next: force-fresh reprobe before editing; if confirmed, isolate only the first current setobject.c blocker around line 1782 in a separate TDD slice.

Latest run (`set_vectorcall()` `nargs` declaration hoisted; frontier advances)

Date: 2026-10-11 00:33 UTC

Read PORT_STATUS.md, README.md, and attempted the applicable CPython Win9x/MSVC6 reference before acting. The reference path available from the invoked skill is absent in this runtime; other searches did not find a local copy. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded first blocker was freshly force-reprobed before editing using MSVC600 under Wine. _blake2/blake2s_impl.c compiled. The first stable diagnostics were at Objects/setobject.c(2024) in set_vectorcall(): C2275 Py_ssize_t, C2146 before nargs, and C2065 nargs. Later independent designated-initializer blockers were at lines 2186 and 2287. One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write, ephemeral; session 01a12865-1451-7021-a43e-bdb0c99330fc) followed strict TDD. The new regression failed before production edits with the expected assertion that nargs must be declared before executable statements. The only production change hoisted Py_ssize_t nargs; into the function declaration block and moved its PyVectorcall_NARGS(nargsf) initializer to an assignment at its original evaluation point after keyword validation. Argument checks, branches, and return behavior are unchanged. Hash verification confirmed all 165 other pre-existing dirty/untracked files remained byte-for-byte unchanged; exact comparison confirmed only this intended slice in the already-dirty setobject.c.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T003257Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T003257Z/probe-before.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: C2275/C2146/C2065 at Objects/setobject.c(2024); later C2059 at lines 2186 and 2287. Capture: build/cron-20261011T003257Z/probe-before.log.
TDD RED: python3 scripts/vc6-setobject-vectorcall-c89.test.py cpython/Objects/setobject.c before production edit — exit 1 with the expected missing-entry-declaration assertion.
Focused GREEN and applicable setobject regressions: python3 scripts/vc6-setobject-vectorcall-c89.test.py cpython/Objects/setobject.c and for test in scripts/*setobject*.test.py; do echo "$ python3 $test cpython/Objects/setobject.c"; python3 "$test" cpython/Objects/setobject.c || exit; done — exit 0. All six setobject scripts passed, including the new declaration/evaluation-order check and existing frozenset-vectorcall, issuperset, make-new-set, setiter-reduce, and table-resize checks.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T003257Z/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T003257Z/probe-post.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. No diagnostics remain at set_vectorcall() line 2024. The next designated-initializer blockers are at setobject.c lines 2188 and 2289. Capture: build/cron-20261011T003257Z/probe-post.log.
git diff --check -- PORT_STATUS.md scripts/vc6-setobject-vectorcall-c89.test.py and git -C cpython diff --check -- Objects/setobject.c — exit 0. git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/setobject.c (only set_vectorcall() declaration/assignment split), new scripts/vc6-setobject-vectorcall-c89.test.py, and this status entry. Compiler-probe progress only, not a completed port. Next: force-fresh probe before editing; if unchanged, handle only the first designated initializer at setobject.c(2188) in its own TDD slice. Do not combine the later initializer at 2289 or claim a completed port.

Latest run (fresh frontier confirmed; focused coding lane unavailable)

Date: 2026-10-11 02:49 UTC

Read PORT_STATUS.md, README.md, and the applicable CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains at exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previously recorded compiler frontier was force-reprobed under MSVC600/Wine before any edits. _blake2/blake2s_impl.c compiled. The logged setobject.c(2024) declaration blocker is no longer present; the actual first stable errors are C2059 at Objects/setobject.c(2188) on the designated .tp_vectorcall initializer in PySet_Type, followed by a distinct C2059 at line 2289 in PyFrozenSet_Type. A single focused coding-agent delegation was attempted for only the first initializer and strict TDD, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this run is diagnostics-only: no source/test implementation was attempted, no TDD RED/GREEN is claimed, and no production source was modified. Existing local changes remain preserved.

Exact verification:

Forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T-current/probe.log 2>&1 — actual probe exit 2; summary total=105 compiled=104 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostic C2059 at Objects/setobject.c(2188); separate C2059 at (2289). Capture: build/cron-20261011T-current/probe.log.
Compiler banner independently captured using the MSVC600 environment batch under Wine: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 (VC6.0).
Focused coding-agent delegation for only the line-2188 PySet_Type initializer failed before child startup: missing anthropic package; lazy installs disabled. No child edits occurred.
All six applicable existing scripts/vc6-setobject-*.test.py regressions were run against cpython/Objects/setobject.c; each exited 0: frozenset vectorcall, issuperset, make-new-set, setiter-reduce, table-resize, and set-vectorcall.
git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/setobject.c — exit 0. Exact baseline tag/commit verified unchanged.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: retry one focused TDD coding lane for only the PySet_Type positional initializer at line 2188 when a coding provider can start; leave the separate PyFrozenSet_Type initializer at line 2289 untouched. Do not claim port completion.

Latest run (fresh frontier confirmed; coding delegation unavailable)

Date: 2026-10-11 07:02 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference (/home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md) before acting. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior status frontier was force-reprobed. _blake2/blake2module.c, _blake2/blake2b_impl.c, and _blake2/blake2s_impl.c all compiled, so the suggested _blake2/blake2s_impl.c sequence is no longer current. The first stable diagnostics are in Objects/sliceobject.c inside PySlice_New(): late declarations of PyInterpreterState *interp and PySliceObject *obj at lines 126-127 produce C2275/C2065, with subsequent member-access errors cascading. Separate later declaration families at lines 600, 608, and 617 remain out of scope. One focused coding-subagent attempt was made for only the first family, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this run is diagnostics-only: no TDD RED/GREEN, production edit, or regression pass is claimed.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261011T070252Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T070252Z/probe.log 2>&1 — actual probe exit 2; summary total=106 compiled=105 cached=0 skipped=0. The three _blake2 sources compiled. First diagnostics: sliceobject.c(126) C2275 PyInterpreterState / C2065 interp, sliceobject.c(127) C2275 PySliceObject / C2065 obj, then cascading C2223 errors at 128-130; additional distinct late-declaration errors remain at 141, 143, 145, 600, 608, and 617. Capture: build/cron-20261011T070252Z/probe.log.
Focused coding delegation for only the PySlice_New() declaration family — failed before child startup: Anthropic package required; lazy installs disabled. No child edits occurred.
Search for existing focused tests (vc6-sliceobject-*.test.py) found none. No source/test changes were made, so no regression suite was run.
git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/sliceobject.c — exit 0. Exact baseline tag/commit verified unchanged.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress, not a completed port. Next: retry one focused TDD coding lane for only the two PySlice_New() declarations, preserving initializer evaluation at the original locations; do not edit the later sliceobject families or the already compiling _blake2 sources.

Latest run (`slice_richcompare()` C89 declaration family; compiler frontier advances)

Date: 2026-10-11 11:30 UTC

Read PORT_STATUS.md, README.md, and attempted to read the CPython Win9x/MSVC6 reference before acting; the reference path available in prior records was not present in this runtime. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c state was force-reprobed before any source edit. _blake2/blake2s_impl.c compiled; the actual first blocker was Objects/sliceobject.c:slice_richcompare(), with VC6 C2275/C2065 diagnostics on late PyObject *t1, *t2, and *res declarations at lines 602, 610, and 619, followed by cascades. One focused Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral; session 01a12ab5-68eb-7a70-a4b1-adfe714bd9be) followed TDD. It added a focused regression first and observed the expected RED (t1, t2, res not declared at function entry), then hoisted only those declarations into the function declaration block. The tuple allocations, rich comparison assignment, error checks, decrefs, and return remain in their original order. The lane reported a focused compile attempt blocked before compilation by Wine's /run/user/1000/wine/.../lock read-only error; a parent-run forced-fresh full source-list probe subsequently compiled the edited sliceobject and advanced to Objects/structseq.c.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011Tcurrent-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011Tcurrent-reprobe/probe.log 2>&1 — actual probe exit 2; summary total=106 compiled=105 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics were C2275/C2065 at sliceobject.c(602) (PyObject/t1), (610) (PyObject/t2), and (619) (PyObject/res), with later cascades. Capture: build/cron-20261011Tcurrent-reprobe/probe.log.
TDD RED: python3 scripts/vc6-sliceobject-richcompare-c89.test.py — exit 1 before production edit, expected assertion slice_richcompare must declare t1, t2, res without initializers at function entry.
Focused GREEN and all directly applicable sliceobject regression tests: python3 scripts/vc6-sliceobject-richcompare-c89.test.py cpython/Objects/sliceobject.c and for test in scripts/vc6-sliceobject-*.test.py; do python3 "$test" cpython/Objects/sliceobject.c || exit $?; done — exit 0; both the richcompare and existing PySlice_New() regression pass. Scoped nested/outer git diff --check — exit 0.
Post-change forced-fresh source-list probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011Tcurrent-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011Tcurrent-post/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c and Objects/sliceobject.c compile; all prior sliceobject diagnostics are gone. First blocker advances to Objects/structseq.c, starting at line 58 (C2275/C2146/C2065 for Py_ssize_t vsize), with additional declaration and initializer errors later in that file. Capture: build/cron-20261011Tcurrent-post/probe.log.
Exact tag/commit verified unchanged. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/sliceobject.c (only declarations/assignment forms in slice_richcompare()), new scripts/vc6-sliceobject-richcompare-c89.test.py, and this status entry. Compiler-probe progress only; no port completion is claimed. Next: force-fresh probe before editing and isolate only the first current Objects/structseq.c defect family with a focused TDD test. Do not infer the full file's fix from the initial diagnostic or conflate source compilation with linking/runtime acceptance.

Latest run (`PyStructSequence_New()` C89 declaration; frontier advances)

Date: 2026-10-11 UTC

The previously recorded compiler frontier was not the current one: a forced-fresh VC6/Wine source-list probe confirmed _blake2/blake2s_impl.c compiles and the first blocker was Objects/structseq.c(58), a late initialized declaration of vsize in PyStructSequence_New(). One focused Codex CLI lane (codex-cli 0.153.4, session 01a12b2e-4aca-76f2-878d-6937ceb60c69, workspace-write/ephemeral) followed strict TDD. New regression scripts/vc6-structseq-new-c89.test.py failed before production edits as expected, asserting vsize must be declared at function entry. The only production edit declares Py_ssize_t vsize; before the early return and moves VISIBLE_SIZE_TP(type) evaluation to an assignment at its original point after the size < 0 check. Allocation, error handling, and subsequent behavior were not changed. No pre-existing vc6-structseq-*.test.py existed. Later diagnostics in structseq.c were left untouched.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T133200Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T133200Z/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics at structseq.c(58): C2275 Py_ssize_t, C2146 before vsize, C2065 vsize; cascades followed. Capture: build/cron-20261011T133200Z/probe.log.
TDD RED: python3 scripts/vc6-structseq-new-c89.test.py cpython/Objects/structseq.c before production edit — exit 1, expected assertion vsize must be declared without initializer before the size < 0 check.
GREEN: same command after source edit — exit 0, PyStructSequence_New C89 declaration and size lookup order: PASS. No existing vc6-structseq-*.test.py regressions were present. Scoped git diff --check -- PORT_STATUS.md scripts/vc6-structseq-new-c89.test.py and git -C cpython diff --check -- Objects/structseq.c — exit 0.
Post-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T133200Z-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T133200Z-post/probe-post.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled; the previous diagnostics at line 58 are gone. First remaining diagnostics are now structseq.c(95) C2143 and cascades at (96-97) in structseq_traverse(). Further independent diagnostics remain at lines 109, 262, 271-294, 402-413, 582-589, and 616-618. Capture: build/cron-20261011T133200Z-post/probe-post.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c (only the PyStructSequence_New() declaration/assignment split), new scripts/vc6-structseq-new-c89.test.py, and this status entry. Compiler-probe progress only, not a completed port. Next: force-fresh probe before editing; if unchanged, isolate only the structseq_traverse() declaration blocker at line 95 in its own TDD slice.

Latest run (`structseq_traverse()` C89 declaration; frontier advances)

Date: 2026-10-11 UTC

Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing outer and detached CPython work. No reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/slice frontier was force-reprobed first. The recorded state was stale: _blake2/blake2s_impl.c compiled, but the actual first blocker was Objects/structseq.c mixed declarations in structseq_traverse() and later functions. One focused Codex CLI lane (codex-cli 0.153.4, session 01a12ba6-de06-75e3-97dc-77f68c3f7ab7, workspace-write/ephemeral) followed TDD for only the first declaration family. New test scripts/vc6-structseq-traverse-c89.test.py failed before production edits with the expected assertion on the late Py_ssize_t i, size;; the sole production edit hoisted that declaration before the heap-type visit. size = REAL_SIZE(obj) remains after the visit, preserving lookup/evaluation order. No other source location was edited. Snapshot verification confirmed all 173 pre-existing changed/untracked files remained byte-identical.

Exact verification:

Before-change forced-fresh: XDG_RUNTIME_DIR="$PWD/build/cron-20261011-blake2-check/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011-blake2-check/probe.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics in structseq.c were C2143 at line 95, then C2065 size/i at lines 96-97 and cascades; separate later declaration/initializer families followed. Capture: build/cron-20261011-blake2-check/probe.log.
TDD RED: python3 scripts/vc6-structseq-traverse-c89.test.py — exit 1 before source edit, expected assertion that i and size must precede the heap-type check. GREEN: same command after edit — exit 0.
Applicable regressions: python3 scripts/vc6-structseq-traverse-c89.test.py and python3 scripts/vc6-structseq-new-c89.test.py — exit 0. Outer and scoped nested git diff --check — exit 0.
Post-change forced-fresh probe: same command with output build/cron-20261011-blake2-check/probe-post.log and runtime build/cron-20261011-blake2-check/post-runtime — actual probe exit 2; total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The former traverse diagnostics at lines 95-97 are gone; the first remaining diagnostic family advances to structseq_dealloc() at line 109 (C2275 PyTypeObject, C2065 tp), followed by distinct later mixed-declaration and initializer errors. No separate compiler banner captured.
The existing Codex snapshot comparison reported 173 pre-existing modified/untracked files preserved. Exact baseline tag/commit unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c (one declaration move), new scripts/vc6-structseq-traverse-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next: force-fresh probe before editing and isolate only the first current structseq_dealloc() declaration family at line 109 in its own TDD slice.

Latest run (fresh probe moved first blocker to `structseq.c`; coding lane unavailable)

Date: 2026-10-11 UTC

The status-recorded sliceobject.c frontier was stale. A forced-fresh MSVC600/Wine source-list probe compiled _blake2/blake2s_impl.c and reported first stable errors in Objects/structseq.c(109): C2275 (PyTypeObject illegal use as expression) and C2065 (tp undeclared) for the initialized declaration in structseq_dealloc(). Separate later mixed-declaration diagnostics occur at line 262; they are not part of this attempted first slice and remain untouched. A single focused coding-agent delegation was attempted, as required for implementation, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. Thus this run is diagnostics-only: no TDD RED/GREEN cycle, source edit, or new regression is claimed. Existing applicable structseq regressions passed.

Exact verification:

XDG_RUNTIME_DIR="$PWD/build/cron-20261011-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011-current/probe-before.log 2>&1 — probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostics: Objects/structseq.c(109) C2275 PyTypeObject and C2065 tp; later separate C2143/C2065/C2059 diagnostics at line 262. Capture: build/cron-20261011-current/probe-before.log.
Exact baseline checks: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. codex --version → codex-cli 0.153.4; codex login status → logged in using ChatGPT. The focused delegate_task coding lane failed before startup with the Anthropic package/lazy-install error. No child edits occurred.
python3 scripts/vc6-structseq-new-c89.test.py cpython/Objects/structseq.c — exit 0, PyStructSequence_New C89 declaration and size lookup order: PASS.
python3 scripts/vc6-structseq-traverse-c89.test.py cpython/Objects/structseq.c — exit 0, structseq_traverse C89 declarations and visit/size lookup order: PASS.
git diff --check -- PORT_STATUS.md and git -C cpython diff --check -- Objects/structseq.c — exit 0. No standalone MSVC compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: use a working focused coding lane (Codex CLI is installed/authenticated, but the available native delegate backend failed before startup) for a strict TDD test of only the structseq_dealloc() declaration at line 109; preserve tp = Py_TYPE(obj) after PyObject_GC_UnTrack(obj). Then rerun the forced-fresh probe to establish the next actual frontier. Do not touch the independent line-262 blocker in that slice.

Latest run (`structseq_repr()` C89 loop declaration; frontier advances)

Date: 2026-10-11 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The previous compiler frontier was re-probed with a forced-fresh MSVC600/Wine source-list run before editing. _blake2/blake2s_impl.c compiled. The first blocker was the C99 loop initializer declaration for (Py_ssize_t i=0; ...) in Objects/structseq.c:structseq_repr() at line 263. One focused Codex CLI lane (codex-cli 0.153.4, one-shot codex exec, workspace-write/ephemeral; logged in with ChatGPT) followed strict TDD. Its new scripts/vc6-structseq-repr-c89.test.py failed before the production edit with the expected assertion that the VC6-incompatible loop declaration remained. The only production change declares Py_ssize_t i; in the function declaration block and changes the loop initializer to i=0; the loop still starts after writing (, performs the same per-iteration visible-size check, and increments once per iteration. No other function or defect family changed. Independent scope verification confirmed the exact intended two-line production delta, with pre-existing changes and PORT_STATUS.md preserved by the lane.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T221407Z-fresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T221407Z-fresh/probe-before.log 2>&1 — actual probe exit 2; summary total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostic family at structseq.c(263) was C2143 declaration/statement syntax diagnostics and C2065 i. Capture: build/cron-20261011T221407Z-fresh/probe-before.log.
TDD RED: python3 scripts/vc6-structseq-repr-c89.test.py before production edit — exit 1, expected assertion structseq_repr: VC6 rejects the C99 loop initializer declaration; declare i in the function declaration block.
TDD GREEN and all applicable structseq regressions: python3 scripts/vc6-structseq-repr-c89.test.py and for test in scripts/vc6-structseq-*.test.py; do python3 "$test" || exit $?; done — exit 0. All four structseq tests passed (dealloc, new, repr, traverse). git -C cpython diff --check -- Objects/structseq.c and git diff --check -- scripts/vc6-structseq-repr-c89.test.py — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261011T221407Z-fresh/runtime-post" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261011T221407Z-fresh/probe-after.log 2>&1 — actual probe exit 2; summary remains total=107 compiled=106 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. The former structseq_repr() line-263 diagnostics are gone; first remaining diagnostics now begin at line 273 (C2143 before const, then C2065 name_utf8), followed by distinct late declaration families at lines 280, 294, 296, and 404 and designated initializer errors at 584-591. Capture: build/cron-20261011T221407Z-fresh/probe-after.log.
CPython tag/commit remain unchanged. No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/structseq.c (only structseq_repr() loop variable declaration/initializer), new scripts/vc6-structseq-repr-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next: force-fresh probe before editing and isolate only the first actual remaining structseq_repr() declaration family at line 273; do not combine later declarations or initializer errors.

Latest run (`tuple_alloc()` C89 declaration; frontier advances)

Date: 2026-10-12 15:53 UTC

The recorded tupleobject frontier was freshly force-reprobed. _blake2/blake2s_impl.c compiled. The current first errors were Objects/tupleobject.c(43) C2275 (PyTupleObject) and C2065 (op) on PyTupleObject *op = maybe_freelist_pop(size);. A native coding-subagent attempt failed before startup because anthropic is unavailable and lazy installs are disabled; the installed Codex CLI was then used as one focused coding lane. Strict TDD added scripts/vc6-tupleobject-alloc-c89.test.py; RED failed before the source edit on the expected declaration-placement assertion. The only source change declares op in tuple_alloc()'s initial declaration block and leaves op = maybe_freelist_pop(size) at its original point after size validation and the debug assertion. Regression verifies the full function's validation, freelist, overflow, allocation, error, and return order.

Exact verification:

Before-change forced-fresh command: mkdir -p build/cron-current-evidence/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-current-evidence/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-evidence/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: tupleobject.c(43) C2275/C2065. Full log: build/cron-current-evidence/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-alloc-c89.test.py cpython/Objects/tupleobject.c before the production change — exit 1, expected assertion that op must be declared before the size-check statement. GREEN: same command after edit — exit 0, tuple_alloc C89 declaration and validation/allocation order: PASS.
Applicable tupleobject C89 regression set: one script exists, the new vc6-tupleobject-alloc-c89.test.py; focused run exited 0. git -C cpython diff --check -- Objects/tupleobject.c exited 0. Snapshot/hash verification confirmed previously dirty/untracked content, PORT_STATUS.md before its entry, and probe log were unchanged by the coding lane; the nested source has exactly the intended declaration/assignment split.
Post-change forced-fresh command: mkdir -p build/cron-current-evidence-post/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-current-evidence-post/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-evidence-post/probe.log 2>&1 — probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Prior tuple_alloc() diagnostics at line 43 are gone. The next first stable diagnostics are in tupleobject.c(80) (C2143/C2065 for the loop declaration/i); later distinct diagnostics include lines 167, 207, and 219. These remain untouched. Full capture: build/cron-current-evidence-post/probe.log.
CPython tag and commit verified unchanged. No standalone compiler banner, linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed by this slice: cpython/Objects/tupleobject.c (one declaration/assignment split), new scripts/vc6-tupleobject-alloc-c89.test.py, and this status entry. This is compiler-probe progress only, not a completed port. Next frontier: force-fresh probe before edits; if unchanged, isolate only the current tupleobject.c loop-declaration blocker at line 80 in its own TDD slice. Do not conflate compiler progress with linked or target-runtime acceptance.

Latest run (PyTuple_Pack frontier confirmed; coding lane unavailable)

Date: 2026-10-12 UTC

The recorded tupleobject frontier was freshly force-reprobed before any edits and remains current. _blake2/blake2s_impl.c compiled. First stable MSVC600/Wine diagnostics are in Objects/tupleobject.c:PyTuple_Pack() at line 168: C2275 (PyTupleObject) and C2065 (result) on the late initialized declaration, followed by cascading errors at lines 169 and 173. Later, distinct tupleobject blockers remain untouched. One focused coding-subagent delegation was attempted for this single defect family and strict TDD, but failed before child startup because the Hermes runtime requires the unavailable anthropic package and lazy installs are disabled. This run is therefore diagnostics-only: no production/test edits, TDD RED/GREEN cycle, or implementation regression is claimed.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Forced-fresh probe: mkdir -p build/cron-20261012T-current/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-current/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261012T-current/probe-before.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: tupleobject.c(168) C2275/C2065 (PyTupleObject / result); subsequent cascades at (169) and (173). Later independent diagnostics start at (208). Full capture: build/cron-20261012T-current/probe-before.log.
Focused coding-agent delegation for only the line-168 declaration — failed before startup: anthropic package unavailable; lazy installs disabled. No child edits or tests occurred.
Existing applicable tupleobject tests: for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; ...; done — exit 0. vc6-tupleobject-alloc-c89.test.py and vc6-tupleobject-new-c89.test.py each exited 0. git -C cpython diff --check -- Objects/tupleobject.c — exit 0.
No standalone compiler banner, linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no port completion is claimed. Next: retry one focused TDD coding lane for the confirmed PyTuple_Pack() declaration at line 168 when a coding agent can start; leave subsequent tupleobject blockers untouched.

Latest run (`PyTuple_Pack()` C89 declaration; frontier advances)

Date: 2026-10-12 22:27 UTC

One focused coding-agent lane (Codex CLI 0.153.4, OpenAI, workspace-write/ephemeral; session 01a13235-805c-7691-8bb8-6f0ffaab93a8) was used after the fresh probe confirmed the prior PyTuple_Pack() line-168 declaration blocker. TDD RED: new scripts/vc6-tupleobject-pack-c89.test.py failed before the source edit with the intended assertion that result must be declared in the function declaration block. The sole production change declares PyTupleObject *result with the other locals and changes the later initialized declaration to result = tuple_alloc(n); immediately after va_start. Allocation timing, empty-tuple path, error cleanup, item/refcount operations, GC tracking, and return order are preserved. Snapshot/hash comparison verified all 183 other pre-existing dirty/untracked files unchanged.

Exact verification:

Before-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T221714Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; _blake2/blake2s_impl.c compiled; first diagnostics were tupleobject.c(168) C2275/C2065 (PyTupleObject/result), followed by C2223 at line 173. Full capture: build/cron-20261012T221714Z/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-pack-c89.test.py — exit 1 on the expected declaration-placement assertion, before production edit.
GREEN and applicable regressions: python3 scripts/vc6-tupleobject-alloc-c89.test.py, python3 scripts/vc6-tupleobject-new-c89.test.py, and python3 scripts/vc6-tupleobject-pack-c89.test.py — all exit 0. Scoped git diff --check commands for cpython/Objects/tupleobject.c and the new test — exit 0.
Post-change forced-fresh probe: XDG_RUNTIME_DIR="$PWD/build/cron-20261012T-after-pack/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-168/173 diagnostics are gone. The first stable blocker is now tupleobject.c(209) C2143 followed by (210) C2065 i in the next function; later tupleobject blockers remain untouched. Full capture: build/cron-20261012T-after-pack/probe.log.
Exact CPython tag and commit verified unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only PyTuple_Pack() declaration split), new scripts/vc6-tupleobject-pack-c89.test.py, and this status entry. Next: force-fresh probe before changes, then address only the newly confirmed first blocker at tupleobject.c(209-210) in a separate TDD slice. No completed port is claimed.

Latest run (forced-fresh tupleobject frontier; coding lane unavailable)

Date: 2026-10-13 00:33 UTC

Read PORT_STATUS.md, README.md, and the applicable CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. The CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was not current, so it was force-reprobed before any implementation work. _blake2/blake2s_impl.c compiled successfully; the first stable blocker is now Objects/tupleobject.c:tupledealloc() at line 209, where Py_ssize_t i = Py_SIZE(op); follows statements and triggers C2143, followed by C2065 for i at line 210. The earlier status-described PyTuple_Pack() frontier is stale. One focused coding-agent delegation was attempted, but failed before child startup because the Anthropic package is unavailable and lazy installs are disabled. Therefore this run was diagnostics-only: no production/test changes and no TDD RED/GREEN implementation cycle are claimed. The tracked-state change is this status entry only; the compiler log is an untracked diagnostic artifact under build/.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261013T-current-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261013T-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261013T-current-reprobe/probe.log 2>&1 — compiler/probe exit 2; total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: tupleobject.c(209) C2143 and (210) C2065 i. Full capture: build/cron-20261013T-current-reprobe/probe.log.
Focused coding-agent delegation — failed before child startup: missing anthropic package; lazy installs disabled. No child edits occurred.
Existing applicable regressions python3 scripts/vc6-tupleobject-alloc-c89.test.py, python3 scripts/vc6-tupleobject-new-c89.test.py, and python3 scripts/vc6-tupleobject-pack-c89.test.py — all exit 0. They validate existing separate tupleobject slices; no new test or implementation was made for tupledealloc().
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. The outer checkout already had many unrelated dirty/untracked changes; all were preserved.
No standalone compiler banner was captured. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only, not a completed port.

Files changed by this run: PORT_STATUS.md only. Next frontier: when the focused coding-agent provider can start, address only the confirmed tupledealloc() declaration family at line 209 with TDD, preserving the assignment's existing point after Py_TRASHCAN_BEGIN; then rerun its focused VC6 probe and applicable regressions. Leave later tupleobject diagnostics untouched.

Latest run (`_PyTuple_FromArraySteal()` allocation declaration; frontier advances)

Date: 2026-10-13 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all prior work; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh MSVC600/Wine probe confirmed _PyTuple_FromArraySteal()'s late initialized PyTupleObject *tuple declaration at line 408 as the current first blocker. One focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write/ephemeral) added a focused C89/order regression and changed only this declaration family: tuple is declared at function entry, with tuple = tuple_alloc(n); retained after the n == 0 return. Later loop-index and dst declarations, refcount and error behavior remain untouched. No unrelated existing content was overwritten. The lane's exact TDD RED output was not independently captured in this run record; only post-change test success is claimed here.

Exact verification:

Forced-fresh command: mkdir -p build/cron-20261014-blake2-frontier/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-blake2-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-blake2-frontier/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics are tupleobject.c(408) C2275/C2065 (PyTupleObject/tuple); distinct subsequent loop and destination declarations remain. Capture: build/cron-20261014-blake2-frontier/probe.log.
python3 scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py — exit 0; reports declaration placement and evaluation/refcount/error order PASS. All six scripts/vc6-tupleobject-*.test.py scripts — exit 0. git -C cpython diff --check -- Objects/tupleobject.c — exit 0.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (one declaration/assignment split), new scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py, and PORT_STATUS.md. Next frontier: force-fresh probe first; if unchanged, isolate the _PyTuple_FromArraySteal() loop index declaration at line 410 in a separate TDD slice, leaving dst and all later tupleobject blockers distinct.

Latest run (`_PyTuple_FromArraySteal()` destination declaration; frontier advances)

Date: 2026-10-14 UTC

Forced-fresh MSVC600/Wine probe confirmed the recorded dst declaration blocker in _PyTuple_FromArraySteal(). One focused Codex CLI lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a13750-9c4c-70e1-acb0-fb6882e3546e) used strict TDD. The newly added focused test failed before production edit with the expected assertion that function-scope PyObject **dst must precede statements. The sole production change hoists PyObject **dst; into the function declaration block and retains dst = tuple->ob_item; immediately after the allocation-success check. The subsequent loop index and item declarations remain untouched. Two pre-existing focused expectation tests necessarily encoded the former declaration layout; they were narrowly updated to expect the hoisted declaration and assignment. Other tupleobject code/tests were preserved. The lane reported hash-snapshot verification; independent source-diff inspection confirms only the intended declaration/assignment transformation. No commit or publication was performed.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261014-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-reprobe/probe.log 2>&1 — compiler/probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors were tupleobject.c(417) C2275/C2065/C2100 for PyObject/dst; separate loop diagnostics followed. A log-filter helper then exited 1 due to its own Python slicing-expression bug; the saved probe log is valid and the diagnostics were recovered from it. Capture: build/cron-20261014-reprobe/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-from-array-steal-dst-c89.test.py before source edit — exit 1 on the expected function-scope declaration assertion. GREEN after the edit — exit 0.
Applicable regressions: set -e; python3 scripts/vc6-tupleobject-from-array-steal-dst-c89.test.py; python3 scripts/vc6-tupleobject-from-array-steal-c89.test.py; python3 scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py; for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test"; done — exit 0; all eight tupleobject scripts passed. An initial loop without set -e revealed that the two old focused expectations failed on stale layout assertions; those directly related expectations were updated and the complete suite then passed.
Post-change forced-fresh command: mkdir -p build/cron-20261014-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261014-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014-after/probe.log 2>&1 — compiler/probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former dst diagnostics at line 417 are gone. First remaining blocker is the separate C99 loop-index declaration at line 419 (C2143/C2059); later tupleobject blockers remain untouched. Capture: build/cron-20261014-after/probe.log.
git -C cpython diff --check -- Objects/tupleobject.c and outer git diff --check for the status/focused tests — exit 0. No linked pythoncore.dll/python.exe, Wine interpreter execution, or real Windows 98 SE execution was produced. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only _PyTuple_FromArraySteal() dst declaration/assignment split), new scripts/vc6-tupleobject-from-array-steal-dst-c89.test.py, narrowly updated scripts/vc6-tupleobject-from-array-steal-c89.test.py and scripts/vc6-tupleobject-from-array-steal-tuple-c89.test.py, and this status entry. Next: force-fresh probe before editing; if unchanged, isolate only _PyTuple_FromArraySteal()'s success-path loop-index declaration at line 419 in a separate TDD slice. Do not claim port completion.

Latest verified slice (`tuple_vectorcall()` `nargs` declaration; frontier advances)

Date: 2026-10-14 13:15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The top-recorded tuplerepeat() dest_end frontier was force-reprobed first and confirmed fixed in the current checkout. The actual first compiler blocker was the next distinct defect family: tuple_vectorcall()'s late initialized Py_ssize_t nargs declaration at tupleobject.c:733. One focused Codex CLI coding lane (codex-cli 0.153.4, OpenAI provider, workspace-write/ephemeral; session 01a13a92-0248-7e32-9a21-722106ba2320) followed strict TDD. New scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py failed before the production edit on the expected missing function-entry declaration assertion. The sole production edit declares nargs in the function's initial declaration block and assigns nargs = PyVectorcall_NARGS(nargsf); at the original point immediately after keyword validation. The argument validation and return paths are unchanged. A hash snapshot verified all pre-existing dirty/untracked files except the intended cpython/Objects/tupleobject.c were byte-identical during the coding lane.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261014T131503Z-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014T131503Z-frontier/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled, then tupleobject.c(733) reported C2275 (Py_ssize_t used as expression), C2146 (missing ; before nargs), C2065 (nargs undeclared). Later distinct diagnostics included designated initializer at line 917, index at 1236, and C89 loops at 1257/1276. Capture: build/cron-20261014T131503Z-frontier/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py before production edit — exit 1 on the expected assertion that nargs must be in the opening declaration block.
GREEN and applicable regression suite: focused test and for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" cpython/Objects/tupleobject.c || exit "$?"; done — exit 0; all 12 tupleobject regression scripts pass.
After-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261014T131503Z-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014T131503Z-frontier/probe-after.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; former tupleobject.c(733) diagnostics are gone. Next tupleobject blocker is C2059 on the separate designated initializer at line 919; distinct late index declaration at 1238 and C89 loops at 1259/1278 remain untouched. Capture: build/cron-20261014T131503Z-frontier/probe-after.log.
git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py — exit 0. Baseline tag/commit remain unchanged.
No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/tupleobject.c (only tuple_vectorcall() nargs declaration/assignment split), new scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py, and this status entry. Next frontier: in a separate TDD slice, force-fresh confirm and address only the tupleobject.c:919 designated initializer; leave index and later C89 loop declarations separate. No completed port is claimed.

Latest verified slice (`tuple_vectorcall()` `nargs` declaration; frontier advances)

Date: 2026-10-14 13:15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261014T131503Z-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014T131503Z-frontier/probe.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled, then tupleobject.c(733) reported C2275 (Py_ssize_t used as expression), C2146 (missing ; before nargs), C2065 (nargs undeclared). Later distinct diagnostics included designated initializer at line 917, index at 1236, and C89 loops at 1257/1276. Capture: build/cron-20261014T131503Z-frontier/probe.log.
TDD RED: python3 scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py before production edit — exit 1 on the expected assertion that nargs must be in the opening declaration block.
GREEN and applicable regression suite: focused test and for test in scripts/vc6-tupleobject-*.test.py; do python3 "$test" cpython/Objects/tupleobject.c || exit "$?"; done — exit 0; all 12 tupleobject regression scripts pass.
After-change forced-fresh command: XDG_RUNTIME_DIR="$PWD/build/cron-20261014T131503Z-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261014T131503Z-frontier/probe-after.log 2>&1 — actual probe exit 2; summary total=108 compiled=107 cached=0 skipped=0; _blake2/blake2s_impl.c compiled; former tupleobject.c(733) diagnostics are gone. Next tupleobject blocker is C2059 on the separate designated initializer at line 919; distinct late index declaration at 1238 and C89 loops at 1259/1278 remain untouched. Capture: build/cron-20261014T131503Z-frontier/probe-after.log.
git -C cpython diff --check -- Objects/tupleobject.c and git diff --check -- scripts/vc6-tupleobject-vectorcall-nargs-c89.test.py — exit 0. Baseline tag/commit remain unchanged.
No pythoncore.dll/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Latest verified slice (`type_cache_clear()` C89 loop index; frontier advances)

Date: 2026-10-15 UTC

Read PORT_STATUS.md and README.md before acting. The referenced CPython-specific legacy-toolchain reference was not available as a readable file in this workspace; the invoked skill guidance was applied. Preserved all pre-existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior _blake2/blake2s_impl.c frontier is stale: the forced-fresh compiler probe compiled it and advanced to Objects/typeobject.c. The first blocker was the C99 loop-index declaration in type_cache_clear() at line 214. One focused authenticated Codex CLI coding lane (codex-cli 0.153.4, workspace-write/ephemeral; session 01a13cf7-8be8-74c3-b839-7fd408fcd96d) used strict TDD. The new scripts/vc6-typeobject-cache-clear-index-c89.test.py failed before the production edit (exit 1) because Py_ssize_t i was not declared at function entry. The sole production change hoists that declaration and changes the loop initializer to assignment; loop bound, increment, and body order remain unchanged. _PyType_InitCache()'s separate loop at line 227 was not touched. The agent reported its tracked/untracked file hash snapshot remained unchanged outside these two authorized paths.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261015-frontier/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261015-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261015-frontier/probe.log 2>&1 — actual probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First errors: typeobject.c(214) C2143/C2065/C2059 on for (Py_ssize_t i = 0; ...); next separate loop at line 227 left untouched. _blake2/blake2s_impl.c was not the frontier. Full capture: build/cron-20261015-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-cache-clear-index-c89.test.py before source edit — exit 1, expected missing function-entry declaration assertion.
Focused GREEN and applicable regressions: python3 scripts/vc6-typeobject-cache-clear-index-c89.test.py — exit 0; for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit; done — exit 0, one matching test.
After-change forced-fresh command: mkdir -p build/cron-20261015-frontier-after/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261015-frontier-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261015-frontier-after/probe.log 2>&1 — actual probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. Former line-214 diagnostics are gone; next distinct blocker is _PyType_InitCache()'s separate C99 loop declaration at typeobject.c(228) (C2143/C2065/C2059). Full capture: build/cron-20261015-frontier-after/probe.log.
Independent checks: focused/all matching typeobject tests and scoped nested/outer git diff --check — exit 0. Detached baseline unchanged. No linked pythoncore.dll/python.exe, Wine interpreter execution, or Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c (only the type_cache_clear() loop-index declaration/initializer split), new scripts/vc6-typeobject-cache-clear-index-c89.test.py, and this status entry. Next frontier: force-fresh confirm before a separate strict-TDD slice for only _PyType_InitCache()'s loop index. No completed port is claimed.

Latest run (forced-fresh typeobject frontier; implementation lane unavailable)

Date: 2026-10-15 02:42 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved the existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, publication, or patch regeneration. Baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The requested _blake2/blake2s_impl.c sequence was not the current frontier. The forced-fresh probe compiled _blake2/blake2s_impl.c; the first stable blocker remains _PyType_InitCache()'s separate C99 loop-index declaration at Objects/typeobject.c:228, following the already-fixed type_cache_clear() loop. One focused coding-agent delegation was attempted for this defect only, but the provider could not start because no Anthropic credentials are configured. Accordingly this run is diagnostics-only: no production or regression-test edits and no TDD cycle are claimed. Existing work remains untouched.

Exact verification:

Fresh probe command: mkdir -p build/cron-20261016-frontier-refresh/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261016-frontier-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261016-frontier-refresh/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(228) C2143/C2065/C2059 for for (Py_ssize_t i = 0; ...); the next distinct compiler errors begin at typeobject.c(306). Capture: build/cron-20261016-frontier-refresh/probe.log.
Coding-agent delegation for the single confirmed loop-index defect — failed before child startup: no Anthropic credentials configured. No child edits occurred.
Existing focused regression: python3 scripts/vc6-typeobject-cache-clear-index-c89.test.py — exit 0 (type_cache_clear index C89 declaration and unchanged loop body: PASS). This tests the preceding fixed loop, not the current _PyType_InitCache() blocker; no new test was added.
Baseline checks: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested and outer git diff --check — both exit 0.
The probe did not link pythoncore.dll/python.exe, run an interpreter under Wine, or execute on Windows 98 SE. This is compiler-probe progress only.

Files changed this run: PORT_STATUS.md only; diagnostic capture is under build/cron-20261016-frontier-refresh/. Next frontier: when an authorized coding-agent provider is available, use one strict-TDD slice for only _PyType_InitCache()'s loop index at line 228, then run the forced-fresh probe and applicable typeobject regressions. No completed port is claimed.

Latest run (fresh type_mro_modified frontier; implementation lane unavailable)

Date: 2026-10-15 UTC

Read PORT_STATUS.md, README.md, and the CPython 3.11.16 Win9x/MSVC6 reference before acting. Preserved all existing outer and detached CPython changes; no reset, clean, stash, discard, commit, push, publication, or compatibility-patch regeneration. Baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier remains current: _blake2/blake2s_impl.c compiled, then the first compiler diagnostic was the C89 declaration in type_mro_modified() at cpython/Objects/typeobject.c(362) (C2143, missing ; before type). The later custom_mro diagnostic at line 365 is separate and was left untouched. One focused coding-subagent delegation was attempted for a single TDD fix but failed before child startup because no Anthropic credentials are configured. Following the delegation workflow, this run is diagnostics-only: no source/test edits or TDD RED/GREEN cycle are claimed.

Exact verification:

Forced-fresh command: mkdir -p "$TMPDIR/cp311-current-reprobe/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-current-reprobe/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic is typeobject.c(362) C2143. Next distinct diagnostic: typeobject.c(365) C2065 for custom_mro. Capture: $TMPDIR/cp311-current-reprobe/probe.log.
Applicable regressions: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit $?; done — exit 0; all five typeobject scripts passed.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. git -C cpython diff --check -- Objects/typeobject.c — exit 0.
No production or regression-test files changed this run. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only, not a completed port.

Files changed this run: PORT_STATUS.md only. Next frontier: once a focused coding lane can start, use one strict-TDD slice for only the type_mro_modified() declaration at line 362; preserve initialization/evaluation timing and keep custom_mro separate. Do not claim port completion.

Latest verified slice (`assign_version_tag()` bases declaration; frontier advances)

Date: 2026-10-15 UTC

Read PORT_STATUS.md, README.md, and legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved the extensive pre-existing dirty/untracked root and detached CPython work. No reset, clean, stash, discard, commit, push, publication, or patch regeneration. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was force-reprobed first and confirmed: _blake2/blake2s_impl.c compiled, then the first stable errors were typeobject.c(407) C2275/C2065 for late PyObject *bases = type->tp_bases;, followed by the separate n declaration and loop-index declaration. Note the prior status described line 407 as type_mro_modified(); source inspection established it is actually assign_version_tag(). One authenticated Codex CLI 0.153.4 workspace-write/ephemeral lane applied strict TDD to only the bases declaration: new test failed before the source edit on the expected declaration assertion, then passed after hoisting PyObject *bases; and assigning bases = type->tp_bases; at the original evaluation point. n, loop index, and subsequent blockers were untouched. Coding lane preservation report was independently inspected; source diff is restricted to this function's bases declaration plus earlier pre-existing changes, and PORT_STATUS.md remained unchanged during that lane.

Exact verification:

Before-change forced-fresh command: XDG_RUNTIME_DIR="$TMPDIR/cp311-frontier-cron-20261015T200131Z/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors at typeobject.c(407) C2275/C2065 (PyObject/bases); the next distinct declaration family was n at line 408. Capture: $TMPDIR/cp311-frontier-cron-20261015T200131Z/probe.log.
TDD RED: python3 scripts/vc6-typeobject-mro-bases-c89.test.py before production edit — exit 1 at the expected missing opening-declaration assertion. Focused GREEN — exit 0.
Focused regression plus all scripts/vc6-typeobject-*.test.py — exit 0; all seven tests pass. git -C cpython diff --check -- Objects/typeobject.c and git diff --check -- scripts/vc6-typeobject-mro-bases-c89.test.py — exit 0.
After-change forced-fresh command with equivalent Wine environment — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-407 bases diagnostics are gone. First remaining errors are the separate Py_ssize_t n declaration at typeobject.c(409) (C2275/C2146/C2065); loop-index diagnostics follow at line 410, both untouched. Capture: $TMPDIR/cp311-frontier-after-bases-20261015T200733Z/probe.log.
Exact baseline tag/commit verified unchanged. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c (only the assign_version_tag() bases declaration/assignment split), new scripts/vc6-typeobject-mro-bases-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then address only assign_version_tag()'s n declaration in a separate slice. No completed port is claimed.

Latest verified slice (`mro_hierarchy()` `new_mro` C89 declaration)

Date: 2026-10-16 05:02 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. The requested /home/ubuntu/projects/python-win9x checkout does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Preserved all pre-existing root and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded _PyType_Name() frontier was no longer first. A forced-fresh VC6/Wine probe confirmed _blake2/blake2s_impl.c compiles and exposed mro_hierarchy()'s late initialized PyObject *new_mro declaration as the first blocker. The Hermes delegation provider could not start because Anthropic credentials are unavailable. The installed authenticated codex-cli 0.153.4 performed one focused implementation lane under strict TDD. New test RED failed on the expected missing opening-block declaration before production change. The sole production change hoists PyObject *new_mro; and assigns new_mro = type->tp_mro; after the existing res <= 0 return guard. The later tuple declaration and other defect families remain untouched.

Exact verification:

Before-change: mkdir -p "$TMPDIR/cp311-cron-frontier/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-cron-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-cron-frontier/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(677) C2275 (PyObject) and C2065 (new_mro).
TDD RED: python3 scripts/vc6-typeobject-mro-hierarchy-new-mro-c89.test.py before the source edit — exit 1 with the expected assertion that new_mro must be in the opening declarations.
TDD GREEN and applicable regressions: the focused test and every scripts/vc6-typeobject-*.test.py — exit 0; all 11 typeobject scripts passed.
After-change forced-fresh probe using the same command/environment, captured at $TMPDIR/cp311-cron-after-mro-hierarchy/probe.log — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-677 diagnostics are gone. First current errors are typeobject.c(680) C2275/C2065 for the distinct later tuple declaration; untouched. Subsequent diagnostics include C89 declarations/loops at lines 720-725.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped git diff --check commands for the source, test, and status file exited 0. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; this is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c (only the mro_hierarchy() declaration/assignment split), new scripts/vc6-typeobject-mro-hierarchy-new-mro-c89.test.py, and this status entry. Next frontier: force-fresh re-probe, then address only the tuple declaration if still first. Do not claim a completed port.

Latest verified slice (`mro_hierarchy()` tuple declaration; frontier advances)

Date: 2026-10-16 UTC

The requested path /home/ubuntu/projects/python-win9x does not exist; used the actual checkout at /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the CPython 3.11.16/MSVC6 reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved the extensive pre-existing dirty/untracked state. No reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _PyType_Name() state was stale. Fresh forced probes confirmed it already passes and the actual first blocker was the late PyObject *tuple declaration in mro_hierarchy() at typeobject.c(680). Hermes delegation could not start because its configured Anthropic provider lacks credentials; the installed authenticated Codex CLI (codex-cli 0.153.4) performed one focused implementation lane under strict TDD. New scripts/vc6-typeobject-mro-hierarchy-tuple-c89.test.py failed before production editing (exit 1) on the intended opening-declaration assertion. The only production change hoists PyObject *tuple; to the opening declaration block. Both original branch assignments and their evaluation timing remain unchanged. Updated the directly applicable existing scripts/vc6-typeobject-mro-hierarchy-new-mro-c89.test.py expectation. No other defect family changed.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cron-20261016-refresh/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cron-20261016-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cron-20261016-refresh/probe.log" 2>&1 — actual exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostic family: typeobject.c(680) C2275 (PyObject) and C2065 (tuple). Capture: $TMPDIR/cron-20261016-refresh/probe.log.
TDD RED: python3 scripts/vc6-typeobject-mro-hierarchy-tuple-c89.test.py before production edit — exit 1, expected assertion PyObject *tuple; must be in the opening declarations.
GREEN and applicable regressions: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; result=$?; printf '%s: exit %s\\n' "$test" "$result"; if [ "$result" -ne 0 ]; then exit "$result"; fi; done — exit 0; all 12 typeobject scripts passed.
After-change forced-fresh command: mkdir -p "$TMPDIR/cron-20261016-after-mro-tuple/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cron-20261016-after-mro-tuple/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cron-20261016-after-mro-tuple/probe.log" 2>&1 — actual exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former line-680 diagnostics are gone. Next first blocker: typeobject.c(720) C2275/C2146/C2065 on the Py_ssize_t n declaration, followed by the C89 loop declaration at line 721; untouched. Capture: $TMPDIR/cron-20261016-after-mro-tuple/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Scoped nested source and outer focused-test git diff --check — exit 0.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-mro-hierarchy-tuple-c89.test.py, focused expectation update in scripts/vc6-typeobject-mro-hierarchy-new-mro-c89.test.py, and this status entry. Next frontier: force-fresh confirm, then isolate only mro_hierarchy()'s Py_ssize_t n declaration at line 720. Do not conflate compiler-probe progress with a linked or target-running interpreter; no completed port is claimed.

Latest verified slice (`type_set_bases()` n C89 declaration; frontier advances)

Date: 2026-10-16 UTC

Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before acting. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Preserved all existing outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced VC6/Wine probe confirmed the current first blocker was type_set_bases() at Objects/typeobject.c:757: late Py_ssize_t n = PyTuple_GET_SIZE(new_bases);. _blake2/blake2s_impl.c compiled. One focused coding-agent lane used Codex CLI 0.153.4 (workspace-write, ephemeral), since Hermes' configured delegation provider could not start without Anthropic credentials. Strict TDD added scripts/vc6-typeobject-set-bases-n-c89.test.py; its first run failed as expected because n was not declared in the opening block. A flawed initial test assertion counted a later rollback reassignment and failed after the implementation; the assertion was narrowed to the PyTuple_GET_SIZE(new_bases) read, and RED was repeated against the preserved pre-edit source, exiting 1 as expected. The only production change hoists Py_ssize_t n; and leaves n = PyTuple_GET_SIZE(new_bases); after all argument validation and the empty-tuple check. The C89 loop index and all later declarations remain unchanged.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cron-recheck-frontier/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cron-recheck-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cron-recheck-frontier/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable errors were typeobject.c(757) C2275/C2146/C2065 on n, followed by C89 loop declaration diagnostics at line 758. _blake2/blake2s_impl.c compiled. Log: $TMPDIR/cron-recheck-frontier/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-n-c89.test.py on unchanged production source — exit 1, expected opening-declaration assertion. After correcting the overbroad rollback-count assertion, repeated RED against original source — exit 1 on the same expected missing declaration. GREEN: focused script — exit 0.
Applicable tests: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 14 typeobject tests passed.
After-change forced-fresh command: mkdir -p "$TMPDIR/cron-after-set-bases-n/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cron-after-set-bases-n/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cron-after-set-bases-n/probe.log" 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. Former line-757 errors are gone; first blocker advances to typeobject.c(760) C2143/C2065/C2059 for the separate C89 loop-index declaration. Log: $TMPDIR/cron-after-set-bases-n/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. Nested and outer focused git diff --check — exit 0. The coding lane's preservation hash check passed; unrelated dirty/untracked files are preserved.
No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c (only type_set_bases()'s n declaration/assignment split), new scripts/vc6-typeobject-set-bases-n-c89.test.py, and this status entry. Next frontier: force-fresh confirmation, then address only the type_set_bases() loop-index declaration at line 760 if it remains first. No completed port is claimed.

Previous verified slice (`mro_hierarchy()` subclass-loop C89 declarations; frontier advances)

Date: 2026-10-16 UTC

Read PORT_STATUS.md, README.md, and searched both active-profile and project locations for the specified legacy-toolchain reference; that reference file is absent. Preserved all existing outer and detached CPython changes. No reset, clean, stash, discard, commit, push, publication, or patch regeneration. The requested path /home/ubuntu/projects/python-win9x does not exist in this runtime; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The current frontier was confirmed with a forced-fresh MSVC600/Wine probe before implementation: _blake2/blake2s_impl.c compiled, then VC6 reported C2275/C2146/C2065 at Objects/typeobject.c(720) on Py_ssize_t n, and C2143/C2065/C2059 at line 721 on Py_ssize_t i. One focused Hermes coding-subagent attempt failed before startup because Anthropic credentials are unavailable. The installed authenticated Codex CLI (codex-cli 0.153.4, workspace-write/ephemeral) performed the single scoped implementation lane under strict TDD. Its new regression failed before production changes as expected; the two existing mro_hierarchy test expectations also failed against the unchanged loop because they encode its prior tail. The lane updated only those directly applicable expectations and hoisted n/i to the opening declaration block. n = PyList_GET_SIZE(subclasses) remains after the NULL check; i = 0 remains at the original loop initializer. Iteration, recursion, cleanup, and return ordering are unchanged. No other production defect family was edited.

Exact verification:

Before-change forced-fresh command: mkdir -p "$TMPDIR/cp311-run-current-retry/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-run-current-retry/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-run-current-retry/probe.log" 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors at lines 720-721 as above. The immediately preceding identical attempt with a different fresh runtime timed out at 300s (exit 124); rerun completed. Log: $TMPDIR/cp311-run-current-retry/probe.log.
TDD RED: new python3 scripts/vc6-typeobject-mro-hierarchy-loop-c89.test.py before production edit — exit 1 at expected opening declaration assertion. Existing mro-hierarchy-new-mro and mro-hierarchy-tuple tests also failed (exit 1) against unchanged source because their expected function prefix included the pre-slice loop syntax.
GREEN/regressions: focused new test and all 13 scripts/vc6-typeobject-*.test.py scripts — exit 0; each reports PASS. The two prior expectations were narrowly updated to include the opening n/i declarations.
After-change forced-fresh command: mkdir -p "$TMPDIR/cp311-run-after/runtime"; XDG_RUNTIME_DIR="$TMPDIR/cp311-run-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > "$TMPDIR/cp311-run-after/probe.log" 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former mro_hierarchy() line 720-721 diagnostics are gone. New first blocker is typeobject.c(757) C2275/C2146/C2065 on late Py_ssize_t n, followed at line 758 by the C89 loop-index errors in the next function. Full log: $TMPDIR/cp311-run-after/probe.log.
git -C cpython diff --check -- Objects/typeobject.c and outer git diff --check -- scripts/vc6-typeobject-mro-hierarchy-loop-c89.test.py — exit 0. Nested HEAD/tag remain exact. Porcelain comparison confirms no previously existing status entries changed; the sole new outer untracked path from this slice is the focused new regression test.
No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-mro-hierarchy-loop-c89.test.py; focused expected-prefix updates in scripts/vc6-typeobject-mro-hierarchy-new-mro-c89.test.py and scripts/vc6-typeobject-mro-hierarchy-tuple-c89.test.py; and this status entry. Next frontier: force-fresh confirm, then isolate only the typeobject.c(757) declaration defect family if still first. No completed port is claimed.

Latest verified slice (`type_set_bases()` `new_base` C89 declaration; frontier advances)

Date: 2026-10-16 18:34 UTC

Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. The requested /home/ubuntu/projects/python-win9x path does not exist; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Preserved pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The status-recorded type_set_bases() new_base blocker was force-reprobed before editing and confirmed; _blake2/blake2s_impl.c compiled. One focused authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI, workspace-write/ephemeral) implemented only this C89 declaration slice using TDD. New scripts/vc6-typeobject-set-bases-new-base-c89.test.py failed before the production edit with the intended missing opening-declaration assertion. The source change hoists PyTypeObject *new_base; beside the function's existing n/i declarations and retains new_base = best_base(new_bases); at the original evaluation point after the validation loop. No behavior or evaluation order was intentionally changed. The directly applicable base/index/n test expectations were updated to reflect the hoist; unrelated dirty/untracked paths were preserved. A pre-edit hash snapshot covered 217 dirty/untracked files; the agent verified all 216 other pre-existing files unchanged, and Hermes reviewed the exact source diff.

Exact verification:

Before-change forced-fresh command: mkdir -p build/cron-current-recheck/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-recheck/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-recheck/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(791) C2275/C2065 for the late PyTypeObject *new_base. Capture: build/cron-current-recheck/probe.log.
TDD RED: python3 scripts/vc6-typeobject-set-bases-new-base-c89.test.py before production edit — exit 1 with the expected assertion that new_base is missing from the opening declaration block. GREEN: same test after the source edit — exit 0.
First applicable regression run found three existing set-bases tests encoded the old declaration layout (exit 1); updated only those narrow expectations. Final set -e; for test in scripts/vc6-typeobject-*.test.py; do python3 "$test"; done — exit 0; all 17 typeobject tests pass. Scoped git diff --check for source and four relevant tests — exit 0.
After-change forced-fresh probe: mkdir -p build/cron-current-after-new-base/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-after-new-base/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-after-new-base/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The prior typeobject.c(791) new_base errors are gone. First current diagnostic group advances to the distinct late PyObject *old_bases declaration at typeobject.c(800) (C2275/C2065); left untouched. Capture: build/cron-current-after-new-base/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred: compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-set-bases-new-base-c89.test.py, updated scripts/vc6-typeobject-set-bases-base-c89.test.py, scripts/vc6-typeobject-set-bases-index-c89.test.py, scripts/vc6-typeobject-set-bases-n-c89.test.py, and this status entry. Next frontier: force-fresh re-probe before handling only the type_set_bases() old_bases declaration if it remains first. No completed port is claimed.

Latest run (fresh frontier probe; implementation lane unavailable)

Date: 2026-10-16 UTC

Read PORT_STATUS.md, README.md, and the applicable python-3-win9x-msvc6.md reference before acting. The requested /home/ubuntu/projects/python-win9x path does not exist; used the existing checkout at /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. The workspace already contains extensive tracked/untracked modifications; preserved them. No reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The older recorded _blake2/blake2s_impl.c frontier is not current. A forced-fresh probe compiled that source, then first stopped at typeobject.c(800) on the late PyObject *old_bases declaration in type_set_bases(). The requested single focused coding-subagent implementation lane could not start: provider anthropic has no credentials (available providers are openrouter, nous, zai, kimi-coding, minimax). Per scope/TDD and preservation constraints, this run made no speculative production or regression-test edits; this is diagnostics-only.

Exact verification:

mkdir -p build/cron-20261016-refresh/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261016-refresh/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261016-refresh/probe.log 2>&1 — probe exit 2. Summary: total=109 compiled=108 cached=0 skipped=0. Log confirms compile: cpython/Modules/_blake2/blake2s_impl.c and blake2s_impl.c; first compiler diagnostics are typeobject.c(800) C2275 (PyObject) and C2065 (old_bases). Capture: build/cron-20261016-refresh/probe.log.
git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
No production source or test file was changed by this run. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. This is compiler-probe evidence only.

Files changed by this run: PORT_STATUS.md only. Next frontier: in a later run with a usable focused coding lane, TDD-test and address only the old_bases declaration at typeobject.c(800) after a fresh probe; leave later old_base, temp, and other defect families separate.

Latest verified slice (`type_set_bases()` `old_base` declaration; frontier advances)

Date: 2026-10-17 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and the profile CPython Win9x/MSVC6 reference before acting. Preserved all existing dirty/untracked work. No reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded old_base frontier was force-fresh confirmed before edits. A delegated Hermes implementation lane could not start because Anthropic credentials are unavailable; authenticated codex-cli 0.153.4 performed one focused coding lane. Under TDD, new scripts/vc6-typeobject-set-bases-old-base-c89.test.py failed first as expected, requiring old_base in the opening declaration block. The only production change adds PyTypeObject *old_base; beside existing type_set_bases() locals; its assignment and evaluation/control-flow order remain unchanged. Three directly affected declaration-order test expectations were updated to recognize this additional local.

Exact verification:

Before-edit forced-fresh probe: mkdir -p build/cron-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-reprobe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; first stable error typeobject.c(803) C2065 old_base, followed by distinct temp and res errors.
TDD RED: python3 scripts/vc6-typeobject-set-bases-old-base-c89.test.py before production edit — exit 1 on expected missing opening declaration.
GREEN/regressions: focused test and all scripts/vc6-typeobject-*.test.py — final run exit 0, 19/19 passed. Existing expectation adjustments were limited to the three set-bases tests.
After-edit forced-fresh command: mkdir -p build/cron-old-base-after/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-old-base-after/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-old-base-after/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; prior old_base diagnostic is gone. Next diagnostics advance to typeobject.c(809) C2065 temp, then res at line 820; neither changed. Full capture: build/cron-old-base-after/probe.log.
Scoped git diff --check for nested production and outer tests exited 0. Baseline tag and commit verified unchanged.
No pythoncore/python.exe link, Wine interpreter run, or real Windows 98 SE execution occurred. Compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-set-bases-old-base-c89.test.py; updated declaration expectations in scripts/vc6-typeobject-set-bases-index-c89.test.py, scripts/vc6-typeobject-set-bases-n-c89.test.py, and scripts/vc6-typeobject-set-bases-new-base-c89.test.py; and this status entry. Next frontier: force-fresh re-probe, then isolate only temp if still first. No completed port is claimed.

Latest verified slice (`lookup_maybe_method()` descriptor getter declaration; frontier advances)

Date: 2026-10-18 UTC

Used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before changing anything. Preserved the pre-existing extensive outer and detached CPython work; no reset, clean, stash, discard, commit, push, or publication. The previous _blake2 frontier note was stale: a forced-fresh probe confirmed _blake2/blake2s_impl.c compiles, and the first stable blocker is in lookup_maybe_method() at typeobject.c(1636). Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, OpenAI; --sandbox workspace-write --ephemeral) followed strict TDD and preserved local changes. The new scripts/vc6-typeobject-lookup-maybe-method-c89.test.py failed against unchanged source (exit 1) on the intended missing opening-block declaration assertion. The sole production edit hoists descrgetfunc f; into lookup_maybe_method()'s opening declarations and changes its initialization to assignment immediately after the existing *unbound = 0;. Getter evaluation, branches, refcount behavior, and control flow remain in their original order. A source diff comparison confirmed this is the only typeobject.c delta from the pre-lane snapshot. PORT_STATUS.md was unchanged by the coding lane until this report was added.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh command: mkdir -p build/cron-20261018-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; first diagnostic typeobject.c(1636) C2275 for descrgetfunc, followed by declaration cascades. _blake2/blake2s_impl.c compiled. Capture: build/cron-20261018-current-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-lookup-maybe-method-c89.test.py before production edit — exit 1, expected lookup_maybe_method: f must be declared in the opening declaration block (C89); exact source comparison against pre-edit snapshot passed.
GREEN: same focused test after edit — exit 0, lookup_maybe_method descriptor getter C89 declaration and unchanged evaluation/control flow: PASS.
Applicable regression suite: all 30 scripts/vc6-typeobject-*.test.py scripts — exit 0, zero failures. Detailed output: /tmp/vc6-typeobject-lookup-maybe-method-tests.log.
After-change forced-fresh command: mkdir -p build/cron-20261018-after-lookup-maybe-method/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-lookup-maybe-method/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-lookup-maybe-method/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; former line-1636 diagnostic is gone. Next first stable blocker is a distinct declaration family in vectorcall_method() at typeobject.c(1694), C2143 (followed by declaration cascades); left untouched. Capture: build/cron-20261018-after-lookup-maybe-method/probe.log.
git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-lookup-maybe-method-c89.test.py and git -C cpython diff --check -- Objects/typeobject.c — exit 0. Baseline tag/commit unchanged.
Compiler-probe progress only. No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution occurred. No completed port is claimed.

Files changed by this slice: cpython/Objects/typeobject.c (one declaration/assignment split); new scripts/vc6-typeobject-lookup-maybe-method-c89.test.py; and this PORT_STATUS.md entry. Next frontier: force-fresh confirm, then isolate only the first vectorcall_method() declaration blocker at line 1694. Keep later errors separate and do not conflate compiler-probe progress with a linked or running interpreter.

Latest verified slice (`mro_implementation()` `bases` declaration; frontier advances)

Date: 2026-10-18 UTC

Used existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x; requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and the active-profile CPython 3.11.16/MSVC6 reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved all pre-existing dirty/untracked work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c sequence was force-fresh reprobed and had advanced. Before edits, the actual first stable blocker was mro_implementation()'s late initialized PyObject *bases at typeobject.c(1956), C2275/C2065; later n, loop-index and other errors were left untouched. Anthropic-backed delegation was unavailable (missing credentials). One focused authenticated Codex CLI 0.153.4 lane performed the implementation under strict TDD. New regression scripts/vc6-typeobject-mro-implementation-bases-c89.test.py failed on unchanged production source (exit 1, expected missing opening declaration assertion). The only production edit hoisted PyObject *bases; to the opening declaration block and retained bases = type->tp_bases; immediately after the original readiness guard, preserving read timing. The lane verified source-only delta and all snapshotted pre-existing dirty/untracked files unchanged.

Exact verification:

Baseline: git -C cpython describe --tags --exact-match HEAD → v3.11.16; git -C cpython rev-parse HEAD → 41388c9cb160d0886d5ca00d2e6c8782608a4549.
Before-change forced-fresh probe: mkdir -p build/cron-20261018-reprobe/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261018-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First diagnostics: typeobject.c(1956) C2275/C2065 for bases. Capture: build/cron-20261018-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-mro-implementation-bases-c89.test.py before production edit — exit 1, AssertionError: mro_implementation: PyObject *bases; must be in the opening declarations. GREEN: same command after edit — exit 0, mro_implementation bases C89 declaration and guarded read timing: PASS.
Applicable regressions: bash -o pipefail -c 'for test in scripts/vc6-typeobject-*.test.py; do printf "COMMAND: python3 %s\\n" "$test"; python3 "$test" || exit $?; done' | tee /tmp/mro-implementation-bases-tdd/typeobject-tests.log — exit 0; all 33 scripts passed.
After-change forced-fresh probe: mkdir -p build/cron-20261018-after-mro-bases/runtime && XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-mro-bases/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-mro-bases/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former bases diagnostics are gone. First current diagnostic family is typeobject.c(1958) C2275/C2146/C2065 for the separate Py_ssize_t n declaration, followed by C89 loop-index errors at line 1959; neither changed. Capture: build/cron-20261018-after-mro-bases/probe.log.
No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution occurred. This is compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-mro-implementation-bases-c89.test.py, and this status record. Next frontier: force-fresh confirm the mro_implementation() Py_ssize_t n declaration and address only that defect family. No completed port is claimed.

MRO implementation `n` declaration slice (frontier advances)

Date: 2026-10-18 UTC. Existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x was used because requested /home/ubuntu/projects/python-win9x does not exist. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing outer and nested dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh MSVC600/Wine probe confirmed the recorded first family was stale in naming, but current at mro_implementation() line 1958: C2275/C2146/C2065 on late Py_ssize_t n. _blake2/blake2s_impl.c compiled. One focused Codex CLI lane (codex-cli 0.153.4, authenticated OpenAI, workspace-write/ephemeral) performed strict TDD. New scripts/vc6-typeobject-mro-implementation-n-c89.test.py failed before the source edit (exit 1, expected opening-declaration assertion); after minimal change, focused test and all 34 scripts/vc6-typeobject-*.test.py scripts passed (exit 0). The only production change hoists Py_ssize_t n; into the function declaration block and changes the later initialized declaration to n = PyTuple_GET_SIZE(bases); at its original point. i and later defect families were not changed. The existing mro-implementation-bases test expectation was updated only to account for the new declaration and assignment.

Exact evidence:

Before probe: mkdir -p build/cron-20261018-blake-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-blake-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-blake-reprobe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; first errors at typeobject.c(1958) C2275/C2146/C2065 for n, followed by separate i errors at line 1959. Capture: build/cron-20261018-blake-reprobe/probe.log.
TDD RED: python3 scripts/vc6-typeobject-mro-implementation-n-c89.test.py before production edit — exit 1, expected missing declaration assertion.
GREEN/regressions: focused test and for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" || exit "$?"; done — exit 0; all 34 passed.
After probe: mkdir -p build/cron-20261018-after-mro-n/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261018-after-mro-n/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261018-after-mro-n/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; all former n errors cleared. First remaining diagnostic is the separate C99 loop index i at typeobject.c(1960) (C2143/C2065/C2059 cascade); untouched. Capture: build/cron-20261018-after-mro-n/probe.log.
git -C cpython diff --check -- Objects/typeobject.c — exit 0. Complete source delta was independently compared against the pre-edit snapshot; only the n declaration/assignment split is present. No pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution occurred; compiler-probe progress only.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-mro-implementation-n-c89.test.py, adjusted expected prefix in scripts/vc6-typeobject-mro-implementation-bases-c89.test.py, and this entry. Next frontier: force-fresh confirm then handle only the separate loop index i in mro_implementation(). No completed port is claimed.

Diagnostics-only: current typeobject frontier confirmed; coding lane unavailable

Date: 2026-10-19 UTC. The user-specified checkout /home/ubuntu/projects/python-win9x is absent; used the existing checkout /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the active-profile legacy-toolchain reference skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing modified and untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier remains current: a forced-fresh VC6/Wine probe compiled _blake2/blake2s_impl.c and confirmed first stable diagnostics at Objects/typeobject.c(2072) for late PyTypeObject *base (C2275/C2065), followed by dependent C2223 at 2078. Thus the old _blake2 sequence is not the current blocker. Before acting, attempted the required one focused coding delegation; provider startup failed because Anthropic credentials are unavailable. No external coding CLI fallback was used; this run therefore made diagnostics-only progress and did not edit production or test code.

Exact verification:

Forced-fresh probe: mkdir -p build/cron-20261019-verify-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-verify-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-verify-frontier/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors: typeobject.c(2072) C2275/C2065 (PyTypeObject/base), then C2223 at 2078. Capture: build/cron-20261019-verify-frontier/probe.log.
Applicable regression suite: for test in scripts/vc6-typeobject-*.test.py; do python3 "$test" >/dev/null || exit 1; done — exit 0; all 40 tests passed.
git -C cpython describe --tags --exact-match HEAD and git -C cpython rev-parse HEAD verified baseline above; git -C cpython diff --check -- Objects/typeobject.c — exit 0.

Files changed this run: PORT_STATUS.md only. No pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred; compiler-probe progress only. Next narrow frontier: when a coding lane is available, use strict TDD to fix only the typeobject.c(2072) base declaration family, then rerun the forced-fresh probe and applicable regressions. No completed port is claimed.

Diagnostics-only: stale `_blake2` frontier; current blocker is `type_new_copy_slots()`

Date: 2026-10-19 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing tracked modifications and untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh VC6/Wine re-probe command: mkdir -p build/cron-20261019-blake2-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-blake2-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-blake2-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The existing modified _blake2/blake2s_impl.c was compiled successfully (object path logged at line 74); its nested diff was not altered. The recorded _blake2 frontier is therefore stale. First stable errors now occur in cpython/Objects/typeobject.c at line 2630: C2275 (Py_ssize_t illegal use as expression), C2146 (missing ; before j), and C2065 (j undeclared); line 2631 has cascading loop-index errors involving i. Full capture: build/cron-20261019-blake2-reprobe/probe.log.

No implementation or regression-test edit was made: this run establishes a different actual frontier, so the requested _blake2/blake2s_impl.c defect sequence was not touched. Compiler probe only; no pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Files changed this run: this status record only; probe log under build/cron-20261019-blake2-reprobe/. Next step: one focused strict-TDD slice for the line-2630 type_new_copy_slots() C89 declaration family after fresh confirmation; keep the separate line-2631 loop-index defect untouched. No completed port is claimed.

`type_new_copy_slots()` C89 declaration slice (frontier advances)

Date: 2026-10-19 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before work. Preserved all pre-existing dirty/untracked work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced VC6/Wine probe command: mkdir -p build/cron-20261019-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-current-reprobe/probe.log 2>&1 — exit 2; total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First errors were at typeobject.c(2630) C2275/C2146/C2065 on Py_ssize_t j, plus C2143/C2065 loop-index diagnostics at 2631. Capture: build/cron-20261019-current-reprobe/probe.log.

One focused Codex CLI coding lane (codex-cli 0.153.4, workspace-write/ephemeral; Hermes delegation provider unavailable for missing Anthropic credentials) followed strict TDD. Added scripts/vc6-typeobject-type-new-copy-slots-c89.test.py first; against unchanged production source it failed as expected (RED exit 1: opening C89 declarations missing), and a cmp confirmed source unchanged. Minimal edit in cpython/Objects/typeobject.c moves only local declarations j, i, r, and tuple in type_new_copy_slots() to legal C89 positions, preserving assignment/evaluation timing and control flow. Focused regression passed (exit 0); all 44 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Preservation verification showed all previously dirty/untracked files unchanged apart from the intended nested source and added test.

After-change forced-fresh command: mkdir -p build/cron-20261019-after-copy-slots/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261019-after-copy-slots/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261019-after-copy-slots/probe.log 2>&1 — exit 2; same total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. The line-2630 and 2631 diagnostics are gone. First remaining diagnostics now occur at typeobject.c(2698) C2143/C2065 for a distinct C99 loop-index declaration in type_new_slots_bases(); later declarations remain untouched. Capture: build/cron-20261019-after-copy-slots/probe.log. Nested and outer git diff --check both exited 0. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Files changed: nested cpython/Objects/typeobject.c, new focused regression, and this status entry. Next frontier: force-fresh confirm and isolate only the line-2698 loop-index family. No completed port is claimed.

`type_new_slots_bases()` `base` C89 declaration slice (frontier advances)

Date: 2026-10-20 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before acting. Preserved all existing local work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded frontier was force-fresh confirmed. Before-change command: mkdir -p build/cron-20261020-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261020-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261020-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics: typeobject.c(2705) C2143 on late PyTypeObject *base, followed by C2065 base at 2708 and consequent C2223 at 2708/2713. Capture: build/cron-20261020-reprobe/probe.log.

The configured Hermes coding delegation provider was unavailable (Anthropic credentials missing); one authenticated Codex CLI lane (codex-cli 0.153.4, gpt-6-astra, workspace-write/ephemeral) performed the focused implementation. New scripts/vc6-typeobject-type-new-slots-bases-base-c89.test.py was run against byte-identical production source and failed as expected (RED exit 1: opening declaration assertion). The single production change declares PyTypeObject *base; after obj and before the skip condition, then assigns base = _PyType_CAST(obj); at the original point after the primary-base skip. This preserves retrieval, skip, and cast evaluation order. The child snapshot confirmed all 245 other pre-existing dirty/untracked files, including prior typeobject.c content outside this delta and this status file, remained byte-identical.

Verification: focused regression after the edit — exit 0. All 46 scripts/vc6-typeobject-*.test.py scripts — exit 0. git diff --check -- scripts/vc6-typeobject-type-new-slots-bases-base-c89.test.py and git -C cpython diff --check -- Objects/typeobject.c — exit 0. After-change forced-fresh command: mkdir -p build/cron-20261020-after-slots-base/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261020-after-slots-base/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261020-after-slots-base/probe.log 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former diagnostics at 2705/2708/2713 are gone. First current diagnostic advances to typeobject.c(2746) C2275/C2065 for the separate PyObject *new_slots declaration; left untouched. Capture: build/cron-20261020-after-slots-base/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-slots-bases-base-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only the type_new_slots_impl() line-2746 new_slots declaration family. No completed port is claimed.

`type_new_set_module()` module declaration C89 slice (frontier advances)

Date: 2026-10-21 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the legacy-toolchain CPython 3.11.16/MSVC6 reference before acting. Preserved existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. Baseline remains CPython tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine probe confirmed the preceding globals declaration slice and identified the distinct PyObject *module declaration in type_new_set_module() as first blocker. Exact command: mkdir -p build/cron-20261021-module-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-module-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-module-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First diagnostics: typeobject.c(2872) C2275 (PyObject illegal use as expression) and C2065 (module undeclared). _blake2/blake2s_impl.c was not listed as a failure in the captured first diagnostic group. Wine emitted a long socket-path warning for repository-local XDG_RUNTIME_DIR; compilation continued. Capture: build/cron-20261021-module-reprobe/probe.log.

Hermes delegation was unavailable because the configured Anthropic provider has no credentials. Used the single authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral), which followed strict TDD. New scripts/vc6-typeobject-type-new-set-module-module-c89.test.py failed against byte-verified unchanged production source (RED exit 1, expected opening-declaration assertion). The minimal source change declares PyObject *module; with the opening locals and converts the later initialized declaration to assignment exactly at its prior lookup point. The directly affected globals regression was narrowly updated to expect the new declaration while retaining ordering checks. Focused tests passed; all 50 scripts/vc6-typeobject-*.test.py regressions passed (exit 0). A full workspace snapshot check confirmed only those two tests and cpython/Objects/typeobject.c changed during implementation; pre-existing paths remained byte-identical. Outer git diff --check and nested git -C cpython diff --check -- Objects/typeobject.c exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261021-after-module/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261021-after-module/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261021-after-module/probe.log 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former typeobject.c(2872) diagnostics are gone. First remaining diagnostic family advances to typeobject.c(2937) C2143 on the distinct const char *doc_str declaration, with C2065 doc_str consequence at 2938; left untouched. Capture: build/cron-20261021-after-module/probe.log. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-set-module-module-c89.test.py, narrowly adjusted scripts/vc6-typeobject-type-new-set-module-globals-c89.test.py, and this status entry. Next frontier: force-fresh confirm and isolate only the type_new_set_doc() doc_str declaration family. No completed port is claimed.

Re-probe: current frontier is `type_new_classmethod()` (diagnostics only)

Date: 2026-10-25 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the installed legacy-toolchain reference at /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Existing work remains preserved; no reset, clean, stash, discard, commit, push, or publication. CPython remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded prior frontier was stale: forced-fresh probe command mkdir -p build/cron-current-frontier/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-current-frontier/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-current-frontier/probe.log 2>&1 returned exit 2. Summary: total=109 compiled=108 cached=0 skipped=0. The initial _blake2/blake2s_impl.c sequence compiled; first stable errors now occur at cpython/Objects/typeobject.c(3001): C2275 (PyObject, illegal use of type as expression) and C2065 (method, undeclared identifier). Capture: build/cron-current-frontier/probe.log. cpython/Modules/_blake2/blake2s_impl.c already contains local changes in the existing dirty checkout; none were altered by this run.

Delegation prerequisite check found /home/ubuntu/.local/bin/codex and /usr/bin/wine, but no MSVC600/VC98/bin/VCVARS32.BAT at the expected path. The focused coding subagent could not start: delegation provider anthropic has no credentials. Accordingly no implementation/test slice was attempted. This is diagnostics-only; no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution is verified. Next safe step: restore/check the VC6 environment prerequisite and run a single TDD slice for the method declaration at the actual frontier. No completed port is claimed.

`type_new_classmethod()` method declaration C89 slice (frontier advances)

Date: 2026-10-24 UTC. Requested path /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before work. Preserved all existing dirty and untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline: v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh before-change probe: mkdir -p build/cron-20261024-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable blocker: typeobject.c(3001) C2275 (PyObject) and C2065 (method) in type_new_classmethod(); later declaration families left untouched. Capture: build/cron-20261024-reprobe/probe.log.

Configured Hermes delegation provider was unavailable (Anthropic credentials missing); one authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) completed the focused implementation under TDD. New scripts/vc6-typeobject-type-new-classmethod-c89.test.py failed against unchanged production source (RED exit 1; expected late declaration condition). The sole source change hoists PyObject *method; to the function's opening local declarations and turns PyObject *method = PyClassMethod_New(func); into method = PyClassMethod_New(func); at its original evaluation point. No other defect family or existing regression fixture changed. Child reported source-delta/preservation checks exit 0.

Parent verification: python3 scripts/vc6-typeobject-type-new-classmethod-c89.test.py — exit 0; all 55 scripts/vc6-typeobject-*.test.py fixtures run individually — 55 passed, 0 failed, runner exit 0. Outer git diff --check and nested git -C cpython diff --check -- Objects/typeobject.c both exit 0. After-change forced-fresh command: mkdir -p build/cron-20261024-after-classmethod/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-after-classmethod/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-classmethod/probe.log 2>&1 — exit 2. The former line-3001 diagnostics cleared; first remaining diagnostics are at typeobject.c(3025), C2143 and cascading undeclared i, the distinct C99 loop-index family, left untouched. Full capture: build/cron-20261024-after-classmethod/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-classmethod-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: fresh probe on the next run, then isolate only the verified typeobject.c(3025) loop-index family. No completed port is claimed.

`type_new_get_bases()` empty-bases `new_bases` declaration slice

Date: 2026-10-21 UTC. The requested /home/ubuntu/projects/python-win9x checkout is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all prior dirty and untracked work; no reset, clean, stash, discard, commit, push, or publication. Nested CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change command: mkdir -p build/cron-20261029-current-reprobe/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261029-current-reprobe/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The first error family was actually type_new_get_bases() at typeobject.c(3286), C2275 PyObject / C2065 new_bases; later C99 loop diagnostics at line 3294 were separate. Although the preceding status text labeled line 3286 as type_new_impl(), source and fresh diagnostics identify the correct function as type_new_get_bases(); the isolated slice below follows the actual source. Capture: build/cron-20261029-current-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral; no commit) followed strict TDD. New scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py failed against unchanged source (RED exit 1, expected declaration-placement assertion). The only production edit hoists PyObject *new_bases; to the start of the existing if (nbases == 0) block and makes the original allocation an assignment at the same point after ctx->base is set. Focused GREEN passed (exit 0); all 59 scripts/vc6-typeobject-*.test.py tests passed independently (exit 0). Snapshot check confirmed 258 pre-existing paths byte-identical and only the expected nested typeobject.c source delta plus new regression; PORT_STATUS.md was not changed by the coding lane. Nested and outer git diff --check both exited 0.

After-change forced-fresh command: mkdir -p build/cron-20261029-after-new-bases/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261029-after-new-bases/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-after-new-bases/probe.log 2>&1 — exit 2; summary unchanged total=109 compiled=108 cached=0 skipped=0. Former line-3286 C2275/C2065 errors cleared. First current blocker is the distinct C99 for (Py_ssize_t i...) in type_new_get_bases() at typeobject.c(3295), with dependent undeclared i and syntax diagnostics; untouched. Capture: build/cron-20261029-after-new-bases/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py, and this status entry. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next: fresh-confirm and isolate only the loop-index declaration at line 3295. No completed port is claimed.

`type_new_get_bases()` loop-index C89 slice (frontier advances)

Date: 2026-10-29 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before work. Preserved pre-existing changes; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine probe: mkdir -p build/cron-20261029-current-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable family was typeobject.c(3295) C2143 on the C99 for (Py_ssize_t i...) initializer and dependent undeclared i / syntax diagnostics. Capture: build/cron-20261029-current-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral; no commit) followed strict TDD. New scripts/vc6-typeobject-type-new-get-bases-index-c89.test.py failed against unchanged production source (RED exit 1, expected opening declaration assertion); cmp against the pre-edit typeobject.c snapshot exited 0. The only production edit hoists Py_ssize_t i; into type_new_get_bases() after nbases and changes the loop initializer to i = 0, preserving bounds, increment, body, and behavior. The directly affected scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py was minimally updated to allow this separate declaration while retaining its allocation-order assertions. Focused test passed (exit 0); all 60 scripts/vc6-typeobject-*.test.py regressions passed (0 failures). Snapshot checks confirmed the production source differs only by the intended declaration/initializer change, the existing fixture by its narrow expected-prefix allowance, and PORT_STATUS.md was not modified during the delegated lane.

After-change forced-fresh probe: mkdir -p build/cron-20261029-after-get-bases-index/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-after-get-bases-index/probe.log 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. The former line-3295 C2143/C2065 loop diagnostics cleared. First current diagnostic family advances to typeobject.c(3301) C2143 for the later PyObject *mro_entries declaration, followed by C2065 at 3303; left untouched. Additional late declarations at lines 3316 and 3336 remain distinct and untouched. Capture: build/cron-20261029-after-get-bases-index/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-get-bases-index-c89.test.py, narrowly updated scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py, and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only type_new_get_bases()'s mro_entries declaration. No completed port is claimed.

`type_new_get_bases()` `mro_entries` C89 declaration slice (frontier advances)

Date: 2026-10-29 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the legacy-toolchain reference before work. Preserved all existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine probe: mkdir -p build/cron-20261029-current-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable diagnostics were typeobject.c(3301) C2143 and (3303) C2065 mro_entries; later declaration families remain distinct. Capture: build/cron-20261029-current-reprobe/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write, ephemeral; no commit) followed strict TDD. New scripts/vc6-typeobject-type-new-get-bases-mro-entries-c89.test.py failed against unchanged production source (RED exit 1: mro_entries must precede loop statements (C89)); a byte comparison confirmed source unchanged before implementation. The sole production edit moved PyObject *mro_entries; directly after the base declaration and before the type-check statement. Attribute lookup remains after the type check, preserving evaluation/control-flow order. Focused regression passed (exit 0), and all 61 scripts/vc6-typeobject-*.test.py scripts passed individually. Snapshot verification confirmed pre-existing dirty/untracked paths, including PORT_STATUS.md, remained unchanged during the coding lane.

After-change forced-fresh probe: mkdir -p build/cron-20261029-after-mro-entries/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261029-after-mro-entries/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. The former line-3301/3303 diagnostics cleared. First current blocker advances to typeobject.c(3316) C2275/C2065 for the separate PyTypeObject *winner declaration; related errors at 3323/3325 are cascading. Left untouched. Capture: build/cron-20261029-after-mro-entries/probe.log. Focused test rerun passed (exit 0); outer and nested git diff --check both exited 0.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-type-new-get-bases-mro-entries-c89.test.py, and this status entry. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next: force-fresh confirm and isolate only the winner declaration family. No completed port is claimed.

`type_new_get_bases()` `winner` C89 declaration slice (frontier advances)

Date: 2026-10-21 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference before work. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change VC6/Wine command: mkdir -p build/cron-20261030-current-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261030-current-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics were typeobject.c(3316) C2275 (PyTypeObject) and C2065 (winner), with cascading C2223 at 3323/3325. The next distinct base declaration at 3336 was left untouched. Capture: build/cron-20261030-current-reprobe/probe.log.

Hermes delegation provider could not start (no Anthropic credentials); one authenticated Codex CLI lane (codex-cli 0.153.4, ChatGPT auth, workspace-write/ephemeral) followed strict TDD. New scripts/vc6-typeobject-type-new-get-bases-winner-c89.test.py failed against unchanged source with the expected declaration-placement assertion (RED exit 1). The minimal production edit moved only PyTypeObject *winner; to the function's opening declaration block; its assignment remains at the original evaluation point. Three directly affected type_new_get_bases() tests had narrow declaration/block-boundary expectation changes. Focused test passed (exit 0); all 62 scripts/vc6-typeobject-*.test.py tests passed, individually (0 failures). Preservation snapshot verified all 11,474 other pre-existing files byte-identical, with only the intended source and three directly affected test fixtures changed, plus the new focused test; no deletions and no staged changes. Outer and nested git diff --check and git diff --cached --check all exited 0. Codex's first attempted insertion matched a similar declaration block in another function; the applicable tests detected it, and it was corrected before final verification. No unrelated change was retained.

Forced-fresh after-change command: mkdir -p build/cron-20261030-after-winner/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261030-after-winner/probe.log 2>&1 — probe exit 2; summary remains total=109 compiled=108 cached=0 skipped=0; former line-3316 winner errors cleared. First stable blocker advances to typeobject.c(3336) C2275 (PyTypeObject) and C2065 (base), with distinct later errors beginning at line 3354. Capture: build/cron-20261030-after-winner/probe.log. Focused test rerun and both outer/nested diff checks exited 0.

Files changed by this slice: cpython/Objects/typeobject.c; new scripts/vc6-typeobject-type-new-get-bases-winner-c89.test.py; narrowly updated scripts/vc6-typeobject-type-new-get-bases-index-c89.test.py, scripts/vc6-typeobject-type-new-get-bases-mro-entries-c89.test.py, and scripts/vc6-typeobject-type-new-get-bases-new-bases-c89.test.py; and this status entry. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: force-fresh confirm and isolate only the type_new_get_bases() base declaration at line 3336. No completed port is claimed.

Diagnostics-only: `type_new_ctx` initializer frontier verified; delegated lane pending

Forced-fresh VC6/Wine reprobe command: mkdir -p build/cron-20261022-reprobe-blake/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261022-reprobe-blake/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-reprobe-blake/probe.log 2>&1 — exit 2, but the path exceeded the AF_UNIX socket limit (108 bytes), so reran with short runtime path: mkdir -p /home/ubuntu/r; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-reprobe-blake/probe-retry.log 2>&1 — exit 2. _blake2/blake2s_impl.c compiled. First stable diagnostics reconfirm the recorded frontier at typeobject.c(3365): C2275 (type_new_ctx), C2146 before ctx, C2065 ctx, and C2059 at {. The distinct next diagnostic family begins at line 3379 (PyObject *type) and is untouched. Capture: build/cron-20261022-reprobe-blake/probe-retry.log.

One Hermes coding subagent attempt failed because Anthropic credentials are unavailable. A single authenticated Codex CLI 0.153.4 lane was started (codex exec --sandbox workspace-write --ephemeral, process id 1360911); its TDD implementation result has not yet been retrieved. No implementation is claimed in this record. Probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Current observed outer status count was 135 dirty/untracked entries. Next frontier: complete the isolated TDD slice for the initializer only if the delegated lane returns and independent verification passes; otherwise report the delegation blocker. No completed port is claimed.

Diagnostics-only: current `type_new_ctx` failure is a late local declaration

Date: 2026-10-22 04:14 UTC. The requested /home/ubuntu/projects/python-win9x checkout is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this file, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md before acting. Preserved all pre-existing dirty/untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded _blake2/blake2s_impl.c frontier is stale. Forced-fresh command: mkdir -p build/cron-20261022-current-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-current-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable errors in cpython/Objects/typeobject.c(3365) are C2275 type_new_ctx illegal use as expression, C2146 missing ; before ctx, C2065 undeclared ctx, and C2059 at {; subsequent .metatype/.args/etc. C2224 errors cascade. Full capture: build/cron-20261022-current-reprobe/probe.log.

One focused coding-agent lane was attempted. Hermes delegation was unavailable because the configured Anthropic provider has no credentials; authenticated codex-cli 0.153.4 inspected the workspace and stopped without edits because cpython/Objects/typeobject.c already has the {0} initializer plus explicit field assignments, and scripts/vc6-typeobject-type-new-ctx-c89.test.py already exists. Its test checks the initializer's C89 compilation and 13 field values, but does not enforce declaration-before-statements: type_new_ctx ctx remains introduced after executable statements. No RED test was run; no files changed by the coding lane. Parent ran python3 scripts/vc6-typeobject-type-new-ctx-c89.test.py — exit 0 — and all 65 scripts/vc6-typeobject-*.test.py scripts — 65 passed, 0 failed. This evidence indicates the next defect family is the late local declaration, distinct from the already replaced designated initializer. To avoid claiming an unsupported initializer diagnosis or weakening TDD by reusing an already-passing test, no production edit was made this run.

Files changed this run: PORT_STATUS.md only. This remains compiler-probe progress; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: strict-TDD isolate only the late type_new_ctx ctx declaration (test must assert it is in the opening declaration block, fail against the current source, then verify minimal hoist/assignment behavior), followed by a forced-fresh VC6 probe. No completed port is claimed.

Diagnostics-only: `type_new()` context declaration blocker confirmed; coding lane unavailable

Date: 2026-10-22 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile CPython Win9x/MSVC6 reference before probing. The working tree already contains extensive local changes, including a pre-existing untracked scripts/vc6-typeobject-type-new-ctx-c89.test.py and modifications to cpython/Objects/typeobject.c; preserved these and all other work. No reset, clean, stash, discard, commit, push, or publication. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh probe command: mkdir -p /home/ubuntu/r build/cron-20261022T061658Z-frontier-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022T061658Z-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. First stable diagnostic group is typeobject.c(3365): C2275 on type_new_ctx, C2146 missing ; before ctx, C2065 undeclared ctx, and C2059 at {; subsequent field-access diagnostics cascade. This is consistent with the declaration occurring after statements in type_new(). Exact capture: build/cron-20261022T061658Z-frontier-reprobe/probe.log.

The requested single coding-agent lane was attempted but Hermes delegation could not start because the configured Anthropic provider has no credentials. Following the specified one-lane limit and delegation fallback rules, did not start another external coding CLI lane. No production or regression source was changed this run. The pre-existing scripts/vc6-typeobject-type-new-ctx-c89.test.py was run and passed (exit 0; it compiles/runs a C89 context field-value fixture), but this does not test declaration placement and is not a TDD RED/GREEN cycle. The nested diff shows cpython/Objects/typeobject.c already contains a local type_new_ctx ctx = {0}; followed by field assignments; this existing user modification was preserved. git -C cpython diff --check -- Objects/typeobject.c exited 0.

Files changed this run: PORT_STATUS.md only. This is compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution occurred. Next frontier: hoist only the type_new_ctx ctx declaration into the opening local declaration block of type_new() while preserving initialization and field assignments at their current execution point; first add a placement regression and observe RED. No completed port is claimed.

Diagnostics-only: `type_new_ctx` frontier reconfirmed; no safe implementation lane

Date: 2026-10-22 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; operated in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the profile skill reference python-3-win9x-msvc6.md. Preserved the pre-existing dirty/untracked workspace; no reset, clean, stash, discard, commit, push, or publication. CPython baseline is tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The recorded type_new_ctx frontier remains current. Forced-fresh probe command: mkdir -p build/cron-20261022-frontier-reprobe/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261022-frontier-reprobe/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics reconfirm at cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, C2059 at {, then cascading field errors. Complete capture: build/cron-20261022-frontier-reprobe/probe.log.

Coding lane prerequisites: codex-cli 0.153.4 is installed/authenticated (codex login status: “Logged in using ChatGPT”), but the checkout has substantial local modifications and untracked tests (136 outer status entries before this entry; nested CPython also dirty). The external VC6 bundle prerequisite is absent at MSVC600/VC98/bin/VCVARS32.BAT. An isolated clean worktree would not contain the live compatibility/test frontier, and shared-checkout autonomous edits cannot be safely isolated from the existing work. Therefore no coding agent was launched and no implementation or regression test was changed/run. This is diagnostics-only, not a claimed TDD cycle.

Files changed this run: PORT_STATUS.md only. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier remains narrowly scoped: add a placement-focused RED regression for the type_new_ctx ctx declaration, then hoist only that declaration if a safe coding lane and usable compiler bundle are available; preserve initialization/field assignments at their execution point. No completed port is claimed.

Diagnostics-only: current frontier still `type_new_ctx ctx`; VC6 toolchain absent

Date: 2026-10-22 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before work. Preserved all pre-existing modified and untracked paths; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The _blake2/blake2s_impl.c sequence is stale as a blocker: the forced-fresh probe compiled that source, then reproduced the current first stable compiler diagnostics at cpython/Objects/typeobject.c(3365): C2275 for type_new_ctx, C2146 before ctx, C2065 undeclared ctx, and C2059 at {; subsequent field/type errors are cascades. Exact command: mkdir -p build/cron-20261023-current-frontier-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261023-current-frontier-reprobe/probe.log 2>&1 — probe exit 2; total=109 compiled=108 cached=0 skipped=0. Capture: build/cron-20261023-current-frontier-reprobe/probe.log.

No implementation/TDD lane was launched: required external compiler bundle path MSVC600/VC98/bin/VCVARS32.BAT is absent, so the requested focused VC6 verification cannot currently be run. This workspace already has extensive unrelated dirty/untracked state (137 outer status entries); all was preserved. No source or test files changed. PORT_STATUS.md is the only tracked file changed by this diagnostics run. Compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier remains investigate a C89-compatible type_new_ctx ctx declaration/initialization split only once the VC6 toolchain is restored, then run the focused probe and applicable regressions. No completed port is claimed.

Diagnostics-only: `type_new_ctx` frontier reconfirmed; VC6 bundle unavailable

Date: 2026-10-30 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and /home/ubuntu/.hermes/profiles/maxwell/skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all existing work; no reset, clean, stash, discard, commit, push, or publication. Nested CPython remains exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Re-probed the actual frontier using XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261030-frontier-recheck/probe.log 2>&1 — exit 2. Forced-fresh source-list summary: total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics reconfirm cpython/Objects/typeobject.c(3365): C2275 type_new_ctx, C2146 before ctx, C2065 ctx, C2059 at {; subsequent field/other C99 errors are cascading or later blockers. Full capture: build/cron-20261030-frontier-recheck/probe.log.

The required local compiler launcher MSVC600/VC98/bin/VCVARS32.BAT is absent (file check exit 1), so this environment cannot run the required focused VC6 probe after an edit. No implementation or regression test was changed, no subagent was delegated, and no regression suite was run. Files changed by this run: PORT_STATUS.md only. This is compiler-probe progress only; no pythoncore/python.exe link, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: restore/provide the external MSVC600 bundle/launcher, then TDD the declaration-placement defect with a focused regression, run that test and applicable regressions, and verify using a forced-fresh VC6 probe. No completed port is claimed.

2026-10-24: `PyType_FromModuleAndSpec` `s` C89 declaration slice (compiler frontier advances)

Worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. CPython baseline: exact tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549; outer HEAD 35caf1a558e6b2c5bf501894d8972f8b0dd828a6. Fresh pre-change capture build/cron-20261024-frontier-reprobe/probe.log: exit 2, total=109 compiled=108 cached=0 skipped=0; first errors (3493) C2143 before const, then (3494) C2065 s. Earlier memb blocker cleared.

Strict TDD: added scripts/vc6-typeobject-from-module-and-spec-s-c89.test.py before production edits. RED command python3 scripts/vc6-typeobject-from-module-and-spec-s-c89.test.py exited 1 at the expected opening-declaration assertion. Minimal production change in cpython/Objects/typeobject.c: declared const char *s; in the opening locals and changed the late initialized declaration to s = strrchr(spec->name, '.'); at the original execution point. The initial GREEN attempt uncovered an over-broad test count (there are two strrchr uses elsewhere in the function); narrowed the assertion to the name-setup region. Corrected focused regression passed (exit 0), and all 70 scripts/vc6-typeobject-*.test.py tests passed (exit 0 each).

Compiler banner independently verified under Wine with cl: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86; command exit 0. Forced-fresh post-change probe command:

mkdir -p build/cron-20261024-after-slice/runtime; XDG_RUNTIME_DIR="$PWD/build/cron-20261024-after-slice/runtime" WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-slice/probe.log 2>&1

Probe exit 2; summary total=109 compiled=108 cached=0 skipped=0. Former line-3493/3494 errors cleared. First remaining stable errors: typeobject.c(3517) C2275 Py_ssize_t, C2146 before name_buf_len, C2065 name_buf_len; later size_t len/tp_doc diagnostics are separate and untouched. The first attempted post-change probe failed before compilation due Wine server lock setup; retry with the repo-local runtime directory above compiled 108 entries and established the source frontier. Captures: build/cron-20261024-after-slice/probe.log, compiler-banner-plain.log; initial failed attempt under s-local/.

Scoped git diff --check -- PORT_STATUS.md scripts/vc6-typeobject-from-module-and-spec-s-c89.test.py and git -C cpython diff --check -- Objects/typeobject.c passed (exit 0). Preservation snapshot check confirmed all unrelated existing dirty/untracked files byte-for-byte unchanged. Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-from-module-and-spec-s-c89.test.py, and PORT_STATUS.md; diagnostic outputs are under build/cron-20261024-after-slice/. No reset, clean, stash, discard, commit, push, or publication. Compiler-probe progress only: no linked pythoncore/python.exe, no interpreter execution under Wine, and no Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the Py_ssize_t name_buf_len declaration family at line 3517. No completed port is claimed.

`PyType_FromModuleAndSpec()` `name_buf_len` C89 declaration slice (frontier advances)

Date: 2026-10-24 UTC. The requested /home/ubuntu/projects/python-win9x checkout is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the active-profile python-3-win9x-msvc6.md reference before acting. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved existing work; no reset, clean, stash, discard, commit, push, or publication.

Forced-fresh pre-change command: mkdir -p /home/ubuntu/r; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-blake2-frontier/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. _blake2/blake2s_impl.c compiled. First stable diagnostic family: cpython/Objects/typeobject.c(3517) C2275 Py_ssize_t, C2146 before name_buf_len, and C2065 undeclared name_buf_len. Initial invocation using repository-local XDG_RUNTIME_DIR failed before compilation because the generated Unix socket path exceeded 108 bytes; rerun with /home/ubuntu/r succeeded. Full capture: build/cron-20261024-blake2-frontier/probe.log.

One focused authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) used strict TDD, preserved unrelated changes, and did not edit this status. New scripts/vc6-typeobject-from-module-and-spec-name-buf-len-c89.test.py failed against unchanged production source (RED exit 1, expected opening-declaration assertion). The only production change hoists Py_ssize_t name_buf_len; into PyType_FromModuleAndSpec()'s opening declarations and replaces the initialized late declaration with an assignment at the same evaluation point. No existing fixture required changes. Focused regression passed; all 71 scripts/vc6-typeobject-*.test.py tests passed individually (0 failures). Outer and nested git diff --check both exited 0. Delegated snapshot verification reported 4,887 pre-existing files unchanged except the intended cpython/Objects/typeobject.c delta; independently verified focused/all tests and diff checks.

Forced-fresh after-change command: mkdir -p /home/ubuntu/r; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-name-buf-len.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. Former line-3517 diagnostics cleared. First remaining stable diagnostic is typeobject.c(3605) C2275 size_t, followed by C2146 before len, C2065 len, then C2143/C2065 involving tp_doc; this distinct next declaration family is untouched. Capture: build/cron-20261024-after-name-buf-len.log.

Files changed by this slice: cpython/Objects/typeobject.c (among pre-existing local edits), new scripts/vc6-typeobject-from-module-and-spec-name-buf-len-c89.test.py, and this status record. This is compile-frontier progress only: no linked pythoncore/python.exe, Wine interpreter execution, or Windows 98 SE execution. Next: force-fresh confirm and isolate only the typeobject.c(3605) size_t len declaration family. No completed port is claimed.

`PyType_FromModuleAndSpec()` `Py_tp_doc` C89 declaration slice (frontier advances)

Date: 2026-10-24 07:36 UTC. Requested checkout /home/ubuntu/projects/python-win9x is absent; worked in /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the CPython Win9x/MSVC6 reference first. Preserved all existing local changes and untracked paths; no reset, clean, stash, discard, commit, push, or publication. CPython baseline remains tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Fresh forced probe before edits: mkdir -p /home/ubuntu/r build/cron-20260604-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260604-reprobe/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable family was typeobject.c(3605) C2275 size_t / C2146 len / C2065 len, followed by line 3606 C2143/C2065 tp_doc. Capture: build/cron-20260604-reprobe/probe.log.

One authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD. New scripts/vc6-typeobject-from-module-and-spec-doc-c89.test.py failed before production edit as expected (RED exit 1: len and tp_doc must be declared at the start ... (C89)). It hoisted only size_t len; and char *tp_doc; to the opening of the Py_tp_doc branch and converted the original initialized declarations to assignments at their original evaluation points. NULL guard, length/allocation order, failure handling, and copy remain unchanged. Focused GREEN passed (exit 0); all 72 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Preservation verification confirmed only cpython/Objects/typeobject.c changed among prior snapshotted files; only the focused test was added. Outer and nested git diff --check passed (exit 0).

Forced-fresh after-change command: mkdir -p /home/ubuntu/r build/cron-20260604-after-doc; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20260604-after-doc/probe.log 2>&1 — probe exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. Former diagnostics at lines 3605–3607 cleared. First stable blocker advances to typeobject.c(3756) C2275 PyHeapTypeObject / C2065 et, with later cascading member access; left untouched. Full capture: build/cron-20260604-after-doc/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-from-module-and-spec-doc-c89.test.py, and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only the PyHeapTypeObject *et declaration family at line 3756. No completed port is claimed.

`PyType_GetModuleByDef()` `n` C89 declaration slice (frontier advances)

Date: 2026-10-24 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and the CPython Win9x/MSVC6 reference before acting. Preserved all pre-existing modified and untracked work; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh pre-change probe: mkdir -p build/cron-20261024-refresh-20261024; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-refresh-20261024/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First current stable diagnostic family in PyType_GetModuleByDef() was line 3797 C2275 Py_ssize_t, C2146 before n, and C2065 n; the following C99 loop initializer i was a separate blocker. Capture: build/cron-20261024-refresh-20261024/probe.log.

One authenticated Codex CLI lane (codex-cli 0.153.4, workspace-write/ephemeral) followed strict TDD while preserving all pre-existing work. New scripts/vc6-typeobject-get-module-by-def-n-c89.test.py failed against unchanged production source (RED exit 1 at the expected opening-declaration assertion; cmp confirmed typeobject.c unchanged). The only production change hoists Py_ssize_t n; into the opening declaration block and changes the later initialized declaration to n = PyTuple_GET_SIZE(mro);, retaining evaluation timing. Directly coupled scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py expectations were updated narrowly. Focused regression passed (exit 0); all 75 scripts/vc6-typeobject-*.test.py tests passed (exit 0). Snapshot verification confirmed only those two fixture/source paths changed during the lane and PORT_STATUS.md remained unchanged. No commit or publication.

Forced-fresh after-change probe: mkdir -p build/cron-20261024-after-n/runtime; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261024-after-n/probe.log 2>&1 — exit 2; summary remains total=109 compiled=108 cached=0 skipped=0. The n diagnostics cleared; first remaining blocker is the separate C99 loop index i at typeobject.c(3799), C2143/C2065 and dependent syntax errors, left untouched. Capture: build/cron-20261024-after-n/probe.log.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-module-by-def-n-c89.test.py, updated scripts/vc6-typeobject-get-module-by-def-mro-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: force-fresh confirm and isolate only PyType_GetModuleByDef()'s loop-index i. No completed port is claimed.

Diagnostics-only: forced-fresh probe advances within `_PyType_GetSubclasses()`

Date: 2026-10-25 UTC. The requested /home/ubuntu/projects/python-win9x path is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. Preserved all pre-existing modifications/untracked files; no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

Forced-fresh command: mkdir -p /home/ubuntu/r build/cron-20261118-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261118-current-reprobe/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled. Former subclasses diagnostics are clear; the first stable errors now reach _PyType_GetSubclasses() Py_ssize_t i at typeobject.c(4223) (C2275/C2146/C2065). Later ref/obj declaration diagnostics remain distinct and untouched. Capture: build/cron-20261118-current-reprobe/probe.log.

One focused coding delegation was attempted but could not start: configured Anthropic credentials are unavailable. No implementation or regression test was changed; no regression suite was run. The scoped source/test changes were not appropriate without a coding lane, and the existing scripts/vc6-object-c89.test.py change/untracked object tests are unrelated local work and remain untouched. Files changed by this diagnostic run: this PORT_STATUS.md entry only; compiler output is a build artifact. Compiler-probe progress only: no pythoncore/python.exe link, Wine interpreter execution, or Windows 98 SE execution. Next: use an available authenticated focused coding lane for strict-TDD isolation of only _PyType_GetSubclasses() loop-index i, then rerun applicable regressions and a forced-fresh VC6 probe. No completed port is claimed.

`_PyType_GetSubclasses()` `ref` C89 declaration slice

Date: 2026-10-26 UTC. The requested checkout /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Before edits, read PORT_STATUS.md, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. CPython baseline verified as tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved pre-existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication. Hermes delegation failed before launch due missing Anthropic credentials; used one authenticated Codex CLI 0.153.4 focused lane.

Forced-fresh pre-change compiler probe: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-run/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled; first stable diagnostics at typeobject.c(4225) C2275 PyObject and C2065 ref, then obj at 4228. Capture: build/cron-20261026-run/probe.log.

Strict TDD: new scripts/vc6-typeobject-get-subclasses-ref-c89.test.py failed against unchanged production source (RED exit 1, expected opening-declaration assertion). The only production change in this slice hoists PyObject *ref; // borrowed ref to _PyType_GetSubclasses()'s opening declarations and removes its former late declaration; it has no initializer, so no assignment was required. PyDict_Next and use timing remain unchanged. The existing coupled get-subclasses-index and get-subclasses-subclasses test expectations were narrowly updated. Focused test passed (exit 0); all 84 scripts/vc6-typeobject-*.test.py passed (exit 0). Nested source and outer affected-fixture git diff --check passed (exit 0). Snapshot verification confirmed all previously dirty/untracked paths unchanged during the delegated implementation.

Forced-fresh post-change probe: XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-ref/probe.log 2>&1 — exit 2; _blake2/blake2s_impl.c compiled. Former ref diagnostics cleared; first remaining blocker is the separate late PyObject *obj declaration at typeobject.c(4228) (C2143), followed by undeclared obj at 4229. Left untouched.

Files changed by this slice: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-get-subclasses-ref-c89.test.py, narrowly updated scripts/vc6-typeobject-get-subclasses-index-c89.test.py and scripts/vc6-typeobject-get-subclasses-subclasses-c89.test.py, and this status record. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: fresh-confirm and isolate only _PyType_GetSubclasses()'s obj declaration. No completed port is claimed.

Diagnostics-only: `type_new_ctx` frontier stale; probe now fails later in `typeobject.c`

Date: 2026-10-26 UTC. The requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read PORT_STATUS.md, README.md, and the legacy-toolchain CPython/MSVC6 reference. Preserved all existing work (extensive modified/untracked paths); no reset, clean, stash, discard, commit, push, or publication. CPython baseline verified: tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549.

The prior recorded type_new_ctx frontier at line 3365 is stale: forced-fresh probe mkdir -p build/cron-20261026-current-reprobe; XDG_RUNTIME_DIR=/home/ubuntu/.hermes/profiles/maxwell/cache/scratch/wine-runtime WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-current-reprobe/probe.log 2>&1 returned probe exit 2 with total=109 compiled=108 cached=0 skipped=0; that line no longer appears as an error. _blake2/blake2s_impl.c is included among the successfully compiled entries. The first stable diagnostics currently reported by the project source-list probe are in cpython/Objects/typeobject.c(4897): C2275 PyTypeObject and C2065 undeclared newto; later diagnostics include C89 mixed declarations throughout the file and the compiler's 100-error cutoff. Full capture: build/cron-20261026-current-reprobe/probe.log.

The expected local launcher MSVC600/VC98/bin/VCVARS32.BAT is absent (test exit 1). No coding subagent was launched and no source/test implementation changes were made: post-edit focused VC6 validation cannot be established safely without the local toolchain prerequisite. This is diagnostics-only, not a TDD cycle. Files changed by this run: PORT_STATUS.md only; probe log is an untracked build artifact. No regression suite was run.

Compiler-probe progress only; no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: restore the external MSVC600 bundle, then fresh-confirm and test-first address only the actual first blocker in typeobject.c (currently newto at 4897). No completed port is claimed.

`object_set_class()` `newto` C89 declaration slice (frontier advances)

Date: 2026-10-26 16:07 UTC. User-requested /home/ubuntu/projects/python-win9x is absent; used /home/ubuntu/Organized/Legacy-Ports/Projects/python-win9x. Read this status, README.md, and skills/software-development/legacy-toolchain-os-porting/references/python-3-win9x-msvc6.md. CPython baseline verified at tag v3.11.16, commit 41388c9cb160d0886d5ca00d2e6c8782608a4549. Preserved the extensive existing dirty/untracked state; no reset, clean, stash, discard, commit, push, or publication.

The requested _blake2/blake2s_impl.c condition is stale. Forced-fresh pre-change command: mkdir -p /home/ubuntu/r build/cron-20261026-run; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-run/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0; _blake2/blake2s_impl.c compiled. First stable diagnostics were cpython/Objects/typeobject.c(4897) C2275 PyTypeObject and C2065 newto, followed by cascading newto->tp_flags errors. Full capture: build/cron-20261026-run/probe.log.

Hermes coding delegation was attempted once and failed before launch because Anthropic credentials are unavailable. Following the coding-agent-delegation fallback, authenticated Codex CLI 0.153.4 ran one isolated-in-scope lane in the heavily modified working checkout; no destructive Git operations. Strict TDD RED: new scripts/vc6-typeobject-object-set-class-newto-c89.test.py failed before production edit (exit 1, expected assertion that newto must be in the C89 opening declaration block). GREEN: cpython/Objects/typeobject.c now declares PyTypeObject *newto; with the opening locals and assigns (PyTypeObject *)value at its prior point, after the same validation. The focused test passed (exit 0); all 88 applicable scripts/vc6-typeobject-*.test.py scripts passed individually (exit 0). Nested git diff --check -- Objects/typeobject.c and outer test diff check passed (exit 0); new-file no-index check emitted no whitespace diagnostics (exit 1 solely because files differ). The lane verified the exact two-location production delta and hashes for all 287 other prior dirty/untracked files unchanged, including this status file before this entry. Lane logs: build/cron-20261026-run/codex.log and codex-last.txt.

Forced-fresh post-change command: mkdir -p build/cron-20261026-after-newto; XDG_RUNTIME_DIR=/home/ubuntu/r WINEPREFIX=/home/ubuntu/.wine-win9xport WINEDEBUG=-all VC6_FRONTIER_FORCE=1 bash scripts/vc6-probe-pythoncore-frontier.sh > build/cron-20261026-after-newto/probe.log 2>&1 — exit 2; summary total=109 compiled=108 cached=0 skipped=0. The newto errors at line 4897 cleared; _blake2/blake2s_impl.c still compiled. First stable diagnostics advance to typeobject.c(5789): C2275 PyObject and C2065 name; later diagnostics in set_names() and subsequent functions are separate/later blockers, left untouched. Full capture: build/cron-20261026-after-newto/probe.log.

Files changed: cpython/Objects/typeobject.c, new scripts/vc6-typeobject-object-set-class-newto-c89.test.py, and this status entry. Compiler-probe progress only: no linked pythoncore/python.exe, Wine interpreter execution, or real Windows 98 SE execution. Next frontier: force-fresh confirm and isolate only the actual typeobject.c(5789) name declaration family. No completed port is claimed.

1.8 MiB Raw Permalink Blame History Unescape Escape

Publication preparation: complete patch and regression checks

Manual continuation: descriptor registration and hash override C89 locals

object_new() obj C89 declaration slice (frontier advances)

PyType_Type designated-initializer C89 slice (frontier advances)

_PyType_GetSubclasses() obj C89 declaration slice (frontier advances)

Diagnostics-only: requested BLAKE2 frontier stale; current typeobject blocker

_PyType_GetSubclasses() loop index i C89 declaration slice (frontier advances)

_PyType_GetSubclasses() subclasses C89 declaration slice (frontier advances)

type_dealloc() et C89 declaration slice (frontier advances)

Diagnostics-only: current compiler frontier reconfirmed at typeobject.c(4191)

type_getattro() local descriptor getter C89 declaration slice (frontier advances)

_PyType_Lookup() cache-update entry C89 declaration slice (frontier advances)

find_name_in_mro() loop-index i C89 declaration slice (frontier advances)

Diagnostics-only: recorded find_name_in_mro() state conflicts with checkout

find_name_in_mro() mro/res C89 declaration slice (frontier advances)

PyType_GetModuleByDef() ht/module C89 declaration slice (frontier advances)

PyType_GetModuleByDef() loop-index i C89 declaration slice (frontier advances)

PyType_GetModuleByDef() mro C89 declaration slice (frontier advances)

PyType_GetModule() et C89 declaration slice (frontier advances)

PyType_FromModuleAndSpec() memb C89 loop declaration slice (frontier advances)

type_vectorcall() tstate C89 declaration slice (frontier advances)

type_vectorcall() tstate declaration frontier (diagnostics only)

type_new() type/res C89 declaration slice

Diagnostics-only: type/res frontier reconfirmed; compiler bundle absent

Diagnostics-only: current type/res frontier confirmed; VC6 bundle unavailable

Diagnostics-only: type_new() context frontier advanced to type/res; VC6 bundle missing

type_new() context declaration C89 slice (frontier advances)

Diagnostics-only: type_new_ctx declaration frontier reconfirmed; VC6 bundle absent

Diagnostics-only: type_new_ctx blocker reconfirmed; coding model unavailable

Diagnostics-only: type_new_ctx frontier reconfirmed; coding lane blocked

type_new() argument local C89 declaration slice (frontier advances)

type_new_get_bases() base local C89 declaration slice (frontier advances)

type_new_init() C89 local declaration slice (frontier advances)

type_new_get_slots() new_slots declaration C89 slice (frontier advances)

type_new_descriptors() C89 loop-index slice (frontier advances)

type_new_staticmethod() static_func C89 declaration slice (frontier advances)

type_new_set_doc() tp_doc C89 declaration slice (frontier advances)

type_new_set_doc() size declaration C89 slice (frontier advances)

type_new_set_doc() doc_str C89 declaration slice (frontier advances)

Diagnostics-only: type_new_set_module() module local confirmed; regression fixture conflict

type_new_set_module() globals declaration C89 slice (frontier advances)

Diagnostics-only: type_new_set_module() globals frontier confirmed; coding delegation unavailable

type_new_alloc() heap-type local C89 slice (frontier advances)

type_new_slots_impl() C89 local declaration slice (frontier advances)

type_new_slots_bases() C89 loop-index slice (frontier advances)

type_new_visit_slots() C89 loop-index slice (frontier advances)

best_base() base_i C89 declaration slice (frontier advances)

Current frontier refreshed: mro_check() base_i declaration

mro_check() base local C89 slice (frontier advances)

Diagnostics-only: recorded MRO frontier is stale; current first blocker is mro_check()

mro_implementation() slow-path result declaration C89 slice (frontier advances)

mro_implementation() population-loop C89 index slice (frontier advances)

MRO implementation merge-loop index: fresh confirmation only; coding lane unavailable

mro_implementation() to_merge C89 declaration slice (frontier advances)

First mro_implementation loop-index C89 slice

Diagnostics-only run: MRO declaration frontier confirmed; implementation delegation unavailable

vectorcall_maybe() C89 declaration slice (frontier advances)

vectorcall_method() C89 declaration slice (frontier advances)

Latest verified slice (subtype_dealloc() GC-branch type_needs_decref; frontier advances)

Latest verified slice (subtype_dealloc() non-GC type_needs_decref declaration; frontier advances)

Latest verified slice (subtype_traverse() managed-dict err declaration; frontier advances)

Latest verified slice (type_repr() local declarations; frontier advances)

Latest verified slice (type_set_annotations() result declaration; frontier advances)

Previous verified slice (type_get_annotations() local declaration; frontier advances)

Latest verified slice (type_set_bases() rollback loop index; frontier advances)

Previous verified slice (type_set_bases() res declaration; frontier advances)

Previous verified slice (type_set_bases() temp declaration; frontier advances)

Latest verified slice (type_set_bases() old_bases declaration; frontier advances)

Latest verified slice (type_set_bases() loop-index C89 declaration; frontier advances)

Latest verified slice (_PyType_Name() C89 local declaration; frontier advances)

Latest verified slice (assign_version_tag() C89 loop index; frontier advances)

Latest verified slice (type_mro_modified() custom_mro C89 declaration; frontier advances)

Previous verified slice (PyType_Modified() obj declaration; frontier advances)

Latest verified slice (PyType_Modified() C89 loop-index declaration; frontier advances)

Previous verified slice (PyType_Modified() C89 subclasses declaration; frontier advances)

Previous verified slice (_PyType_InitCache() C89 loop index declaration; frontier advances)

Previous verified slice (maybe_freelist_push() index C89 declaration; frontier advances)

Previous verified slice (PyTuple_Type.tp_vectorcall C89 initializer; frontier advances)

Previous verified slice (tuplerepeat() dest_end declaration; frontier advances)

1.8 MiB

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`object_new()` `obj` C89 declaration slice (frontier advances)

`PyType_Type` designated-initializer C89 slice (frontier advances)

`_PyType_GetSubclasses()` `obj` C89 declaration slice (frontier advances)

`_PyType_GetSubclasses()` loop index `i` C89 declaration slice (frontier advances)

`_PyType_GetSubclasses()` `subclasses` C89 declaration slice (frontier advances)

`type_dealloc()` `et` C89 declaration slice (frontier advances)

Diagnostics-only: current compiler frontier reconfirmed at `typeobject.c(4191)`

`type_getattro()` local descriptor getter C89 declaration slice (frontier advances)

`_PyType_Lookup()` cache-update `entry` C89 declaration slice (frontier advances)

`find_name_in_mro()` loop-index `i` C89 declaration slice (frontier advances)

Diagnostics-only: recorded `find_name_in_mro()` state conflicts with checkout

`find_name_in_mro()` `mro`/`res` C89 declaration slice (frontier advances)

`PyType_GetModuleByDef()` `ht`/`module` C89 declaration slice (frontier advances)

`PyType_GetModuleByDef()` loop-index `i` C89 declaration slice (frontier advances)

`PyType_GetModuleByDef()` `mro` C89 declaration slice (frontier advances)

`PyType_GetModule()` `et` C89 declaration slice (frontier advances)

`PyType_FromModuleAndSpec()` `memb` C89 loop declaration slice (frontier advances)

`type_vectorcall()` `tstate` C89 declaration slice (frontier advances)

`type_vectorcall()` `tstate` declaration frontier (diagnostics only)

`type_new()` `type`/`res` C89 declaration slice

Diagnostics-only: `type`/`res` frontier reconfirmed; compiler bundle absent

Diagnostics-only: current `type`/`res` frontier confirmed; VC6 bundle unavailable

Diagnostics-only: `type_new()` context frontier advanced to `type`/`res`; VC6 bundle missing

`type_new()` context declaration C89 slice (frontier advances)

Diagnostics-only: `type_new_ctx` declaration frontier reconfirmed; VC6 bundle absent

Diagnostics-only: `type_new_ctx` blocker reconfirmed; coding model unavailable

Diagnostics-only: `type_new_ctx` frontier reconfirmed; coding lane blocked

`type_new()` argument local C89 declaration slice (frontier advances)

`type_new_get_bases()` `base` local C89 declaration slice (frontier advances)

`type_new_init()` C89 local declaration slice (frontier advances)

`type_new_get_slots()` `new_slots` declaration C89 slice (frontier advances)

`type_new_descriptors()` C89 loop-index slice (frontier advances)

`type_new_staticmethod()` `static_func` C89 declaration slice (frontier advances)

`type_new_set_doc()` `tp_doc` C89 declaration slice (frontier advances)

`type_new_set_doc()` size declaration C89 slice (frontier advances)

`type_new_set_doc()` doc_str C89 declaration slice (frontier advances)

Diagnostics-only: `type_new_set_module()` module local confirmed; regression fixture conflict

`type_new_set_module()` globals declaration C89 slice (frontier advances)

Diagnostics-only: `type_new_set_module()` globals frontier confirmed; coding delegation unavailable

`type_new_alloc()` heap-type local C89 slice (frontier advances)

`type_new_slots_impl()` C89 local declaration slice (frontier advances)

`type_new_slots_bases()` C89 loop-index slice (frontier advances)

`type_new_visit_slots()` C89 loop-index slice (frontier advances)

`best_base()` `base_i` C89 declaration slice (frontier advances)

Current frontier refreshed: `mro_check()` `base_i` declaration

`mro_check()` base local C89 slice (frontier advances)

Diagnostics-only: recorded MRO frontier is stale; current first blocker is `mro_check()`

`mro_implementation()` slow-path result declaration C89 slice (frontier advances)

`mro_implementation()` population-loop C89 index slice (frontier advances)

`mro_implementation()` `to_merge` C89 declaration slice (frontier advances)

Latest verified slice (`subtype_dealloc()` GC-branch `type_needs_decref`; frontier advances)

Latest verified slice (`subtype_dealloc()` non-GC `type_needs_decref` declaration; frontier advances)

Latest verified slice (`subtype_traverse()` managed-dict `err` declaration; frontier advances)

Latest verified slice (`type_repr()` local declarations; frontier advances)

Latest verified slice (`type_set_annotations()` result declaration; frontier advances)

Previous verified slice (`type_get_annotations()` local declaration; frontier advances)

Latest verified slice (`type_set_bases()` rollback loop index; frontier advances)

Previous verified slice (`type_set_bases()` `res` declaration; frontier advances)

Previous verified slice (`type_set_bases()` `temp` declaration; frontier advances)

Latest verified slice (`type_set_bases()` `old_bases` declaration; frontier advances)

Latest verified slice (`type_set_bases()` loop-index C89 declaration; frontier advances)

Latest verified slice (`_PyType_Name()` C89 local declaration; frontier advances)

Latest verified slice (`assign_version_tag()` C89 loop index; frontier advances)

Latest verified slice (`type_mro_modified()` `custom_mro` C89 declaration; frontier advances)

Previous verified slice (`PyType_Modified()` `obj` declaration; frontier advances)

Latest verified slice (`PyType_Modified()` C89 loop-index declaration; frontier advances)

Previous verified slice (`PyType_Modified()` C89 subclasses declaration; frontier advances)

Previous verified slice (`_PyType_InitCache()` C89 loop index declaration; frontier advances)

Previous verified slice (`maybe_freelist_push()` index C89 declaration; frontier advances)

Previous verified slice (`PyTuple_Type.tp_vectorcall` C89 initializer; frontier advances)

Previous verified slice (`tuplerepeat()` `dest_end` declaration; frontier advances)

Latest run (fresh `tuplerepeat()` `dest_end` frontier; implementation lane unavailable)

Latest verified slice (`tuplerepeat()` destination declaration; frontier advances)

Latest verified slice (`tupleconcat()` b declaration; host frontier advances)

Latest run (`_PyTuple_FromArraySteal()` success-loop C89 index; frontier advances)

Latest run (`_PyTuple_FromArraySteal()` allocation-failure loop index; frontier advances)

Latest run (`_PyTuple_FromArray()` loop-index declaration; frontier advances)

Latest run (`_PyTuple_FromArray()` destination declaration; frontier advances)

Latest run (`_PyTuple_FromArray()` first declaration hoisted; frontier advances)