Ruff

---
name: ruff
description: "Use when the user lints or formats Python code from the command line. ruff is a 2-in-1 tool - ruff check runs the linter (rules / fixes / import sort / security), and ruff format runs the formatter (Black-compatible style rewrites). They are distinct subcommands..."
---


# ruff

## When to use

See [references/when-to-use.md](references/when-to-use.md). Load only when this section is needed.

## Invocation

See [references/invocation.md](references/invocation.md). Load only when this section is needed.

## Patterns

See [references/patterns.md](references/patterns.md). Load only when this section is needed.

## Anti-patterns

See [references/anti-patterns.md](references/anti-patterns.md). Load only when this section is needed.

## Cross-refs

See [references/cross-refs.md](references/cross-refs.md). Load only when this section is needed.