peter
cc9fc3b544
0.93.2 shipped a week's worth of confusion about which Node this repo
runs on; the Python side had the identical shape and nobody had looked.
Prod (Dockerfile), the test image (Dockerfile.test) and CI (check.yml)
each spelled 3.12 as an independent literal, there was no
`.python-version`, no `requires-python`, and ruff had no target-version
so it judged our syntax against some other interpreter. The dev machine
had no 3.12 installed at all — only 3.13 and 3.14 — so every ad-hoc host
script ran two majors ahead of production.
`.python-version` is now the single source of truth, and the contract is
held by tests rather than by prose. It is split in two because no single
runner can see every link: the pytest suite runs inside the test image,
which mounts backend/ alone and cannot read the repo-root Dockerfile or
the workflow.
test_python_engine_contract.py : running interpreter == pyrightconfig
== ruff.toml
pythonEngine.contract.test.ts : .python-version == pyrightconfig ==
ruff.toml == Dockerfile ==
Dockerfile.test == check.yml
Together they close the loop, and the backend half carries the assertion
that pays — that the interpreter running the suite is the pinned one. A
green suite on another minor does not mean the shipped image is green;
it means they have drifted and nobody has noticed yet.
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2 lines
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3.12
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