Python Lint 🐍

Python-specific code conventions: unittest import shape, PROJECT_ROOT usage, ban on raw os.walk/Path.rglob/uncached read_text, noqa marker hygiene, redundant boolean patterns, and self-path-reference avoidance.

Tests in this directory MUST only cover Python source patterns. Dependency declarations MUST live under dependencies/; YAML/Jinja patterns MUST live under yaml/.

For framework and make test-lint usage see lint.md.