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# Lint Skill Run ruff to check and format Python code. ## Usage ``` /lint # Check entire project /lint src/ # Check specific directory /lint --fix # Auto-fix issues /lint --format # Format code ``` ## Process 1. **Check for ruff** ```bash which ruff || pip install ruff ``` 2. **Run linter** ```bash # Check for issues ruff check . # Check with auto-fix ruff check . --fix # Format code ruff format . # Check formatting without changing ruff format --check . ``` 3. **Report issues** - Error count by type - Files with issues - Suggested fixes ## Quick Commands ```bash # Full lint + format ruff check . && ruff format . # Fix everything ruff check . --fix && ruff format . # Check single file ruff check src/main.py # Show specific rule info ruff rule E501 ``` ## Common Issues | Code | Issue | Fix | |------|-------|-----| | E501 | Line too long | Break line or disable | | F401 | Unused import | Remove it | | F841 | Unused variable | Remove or prefix with _ | | I001 | Import order | Run `ruff check --fix` | | UP035 | Deprecated typing | Use collections.abc | ## Configuration In `pyproject.toml`: ```toml [tool.ruff] line-length = 100 target-version = "py311" [tool.ruff.lint] select = ["E", "F", "I", "UP", "B"] ignore = ["E501"] # Optional: ignore long lines ``` ## Output Format ``` src/api.py:45:1: F401 `os` imported but unused src/utils.py:20:5: F841 Local variable `x` assigned but ne