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Restore opt-in COP001 without runtime import lookup - #7
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October 12, 2026 11:05
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COP001 was disabled because module detection depended on how flake8 was invoked. Restore it using source and filesystem inspection, with project roots derived from the linted filename so console-script and
python -m flake8invocations agree.Keep the existing COP extension. COP001 stays off when selecting the broad COP prefix; repositories opt in using
extend-select = ["COP001"]or by selecting the exact COP001 code. Existing rules remain active without that opt-in.The checker does not execute inspected packages, import hooks, native modules, or
.pthfiles. It reports imports of more than two statically identifiable symbols, preserves the standard-library and existing import exemptions, and leaves unresolved imports and dynamic exports unchecked. Update the plugin's own three-symbol import to satisfy the restored rule.Validation: 221 tests pass locally, including CLI and TOML opt-in, default compatibility, flat/src/namespace layouts, installed source and stub packages, both CLI entry points, and regressions for package initialization side effects and runtime import lookup. Ruff, flake8, mypy, and auto-typing-final pass on Python 3.13; the CI matrix covers Linux, macOS, and Windows on Python 3.10–3.14.