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docs(register): C-104 — the lock installs on cp311 only - #296

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Aug 22, 2026
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docs(register): C-104 — the lock installs on cp311 only#296
Polichinel merged 1 commit into
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Folds the 2026-08-22 measurements into C-104 and updates its Trigger, Location and closing condition.

The finding: poetry install cannot succeed on the developer venv's Python 3.13. It got as far as pipeline-core 2.3.0 → 3.0.1 (26 failed → 6 failed, 470 → 490 passed) and then failed building levenshtein 0.20.9, which ingester3 caps >=0.20,<0.21 and which publishes no 3.12+ wheel. pyarrow 16.1.0 has no cp313 wheel either. The lock resolves on cp311 alone.

CI (3.11) and the delivery's conda prefix (3.11.15, pyarrow 16.1.0) both match the lock exactly — no production or CI impact. Only the developer venv is off, and the remedy test_locked_environment prints is advice that cannot work there, which is precisely the failure mode that test's own design notes rule out.

The pyproject half — python = ">=3.11,<3.15" declaring three interpreters when one resolves — is #295.

Prose only; no code, no entry added, header counts unchanged.

🤖 Generated with Claude Code

Running `poetry install` took the suite from 26 failed/470 passed to
6 failed/490 passed (pipeline-core 2.3.0 -> 3.0.1), then died building
levenshtein 0.20.9 from source. What remains is one drifted package,
pyarrow 23.0.1 against 16.1.0 locked, and all six failures are that
cause: five C-72 byte-parity checks plus the lock check reporting it.

Wheel availability, measured against the index: pyarrow 16.1.0 and
levenshtein 0.20.9 both ship cp311; levenshtein stops at cp311, pyarrow
at cp312. levenshtein is capped >=0.20,<0.21 by ingester3, so the
ceiling is upstream. poetry.lock installs on cp311 alone. CI runs 3.11
and the delivery's conda prefix is 3.11.15 with pyarrow 16.1.0 — both
match the lock. Only the developer venv (3.13.7) is off, and the
command everyone is told to run cannot bring it back.

That makes the entry's own mitigation half wrong in the way it names as
a failure: test_locked_environment rules out printing a remedy that
cannot work, and on 3.12+ its "Run `poetry install`" line does exactly
that. Trigger and Location updated; what closes the entry is now a
rebuild on 3.11, not a reinstall.

The second half — pyproject declaring >=3.11,<3.15 when only 3.11
resolves — is filed as #295, being a declaration defect rather than an
environment one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@Polichinel
Polichinel merged commit 06861d4 into development Aug 22, 2026
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Polichinel deleted the docs/c104-lock-installs-on-311-only branch August 22, 2026 20:12
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