ruff Linting

Expert knowledge for using ruff check as an extremely fast Python linter with comprehensive rule support and automatic fixing.

When to Use This Skill

Use this skill when...	Use a focused sibling instead when...
Running `ruff check`, selecting rule sets, or auto-fixing lint violations	Running `ruff format` to enforce code style — use ruff-formatting
Configuring `[tool.ruff.lint]` rules and per-file ignores in pyproject.toml	Comparing ruff against type-checkers and formatters at a stack level — use python-code-quality
Wiring ruff into editors, pre-commit, CI/CD, Docker, or build systems	See the quick forms in CI/CD Integration below; full editor/CI/Docker/migration recipes in REFERENCE.md
Migrating from Flake8/pylint/isort/pyupgrade to ruff's combined rule set	Running `ruff format` to enforce code style — use ruff-formatting