0.13.1

📅 Sep 18, 2025📦 ruffView on GitHub →

✨ 11 features🐛 7 fixes🔧 11 symbols

Summary

Ruff 0.13.1 introduces several preview lint fixes, new rule behaviors, CLI improvements, and numerous bug fixes, while raising the Rust MSRV to 1.88.

`flake8-simplify`: Detect unnecessary `None` default for additional key expression types (`SIM910`).
`flake8-use-pathlib`: Add fix for `PTH123`.
`flake8-use-pathlib`: Fix `PTH101`, `PTH104`, `PTH105`, `PTH121`.
`flake8-use-pathlib`: Make `PTH111` fix unsafe because it can change behavior.
`pycodestyle`: Fix `E301` to only trigger for functions immediately within a class.
`refurb`: Mark `single-item-membership-test` fix as always unsafe (`FURB171`).
`RUF102`: Respect rule redirects in invalid rule code detection.
`flake8-bugbear`: Mark the fix for `unreliable-callable-check` as always unsafe (`B004`).
`ruff`: Allow dataclass attribute value instantiation from nested frozen dataclass (`RUF009`).
`ruff` CLI: Add fixes to `output-format=sarif`.
`ruff` CLI: Treat panics as fatal diagnostics, sort panics last.

Handle t-strings for token-based rules and suppression comments.
`flake8-bandit`: Fix truthiness: dict-only `**` displays not truthy for `shell` (`S602`, `S604`, `S609`).
`flake8-simplify`: Fix diagnostic to show correct method name for `str.rsplit` calls (`SIM905`).
`flynt`: Use triple quotes for joined raw strings with newlines (`FLY002`).
`pyupgrade`: Fix false positive when class name is shadowed by local variable (`UP008`).
`pyupgrade`: Prevent infinite loop with `I002` and `UP026`.
`ruff`: Recognize t-strings, generators, and lambdas in `invalid-index-type` (`RUF016`).

flake8-simplifyflake8-use-pathlibpycodestylerefurbflake8-banditflyntpyupgraderuffRUF102RUF009RUF016