# Lint gate for `make lint` (and the CI lint job). Ruff is a development tool
# installed by CI / the developer — never a runtime dependency; requirements.txt
# stays at three packages, no build step.
#
# The rule set is the classic correctness core: pycodestyle errors, pyflakes.
# Style churn is deliberately out of scope for a no-build-step codebase.
line-length = 120
target-version = "py311"

[lint]
select = ["E4", "E7", "E9", "F"]