Release Notes Released on 2026-10-01. Preview features Add a migration guide for categories (#28087) [pyupgrade] Add rule for context manager iterator annotations (UP052) (#29000) Performance Reduce memory used by diagnostics (#28951) Server Avoid running uv format in untrusted workspaces (#28873) Documentation Fix links to moved changelog sections and renamed mdtests (#28941) Add Python 3.15 as a…
Release Notes Released on 2026-09-24. Preview features [ruff] Avoid false positives for overloaded division (RUF069) (#28309) Bug fixes [flake8-bugbear] Avoid false positives for calls with keyword arguments (B009, B010, B043) (#28776) [flake8-tidy-imports] Allow lazy imports to be used in deferred annotations (TID255) (#28767) Rule changes Update LibCST-based fixes for Python 3.15 (#28616) [flake…
Release Notes Released on 2026-09-16. Bug fixes Visit functional TypedDict keyword arguments correctly (#28584) [flake8-simplify] Detect nested async with under sync parent (SIM117) (#27821) [flake8-simplify] Preserve operand order in SIM109 fix (#27824) [pyupgrade] Preserve required parentheses in multiline UP040 fixes (#28164) [pyupgrade] Skip TypeVarTuple and ParamSpec conversions with bounds o…
Release Notes Released on 2026-09-10. Preview features [ruff] Add rule for default values on method receivers (RUF077) (#26700) [ruff] Recognize re.prefixmatch (RUF039, RUF055) (#28311) Bug fixes Alternate nested quotes inside format spec interpolations (#28259) [flake8-implicit-str-concat] Mark fix unsafe when it creates a docstring (ISC003) (#27981) [flake8-tidy-imports] Skip fixes for multi-mem…
Release Notes Released on 2026-09-03. Preview features Move pytest-fixture-autouse to the restriction category (#28219) [flake8-pytest-style] Add an autofix for PT020 (#27993) [flake8-tidy-imports] Prevent fix loop between TID254 and TID255 (#28262) [isort] Exclude pragma comments from line length calculation (I001) (#27313) Bug fixes Validate unary expressions when parsing (#28233) [flake8-async,…
Release Notes Released on 2026-08-27. Preview features Allow rules without codes (#28049) Introduce category selectors (#27666) Update preview default rules and categories (#27877) Bug fixes [flake8-async] Detect blocking generic HTTP requests (ASYNC210) (#28024) [flake8-datetimez] Allow timezone-safe strptime chains (DTZ007) (#28023) [flake8-simplify] Respect side effects in lambda defaults (SIM4…
Release Notes Released on 2026-08-20. Preview features [flake8-use-pathlib] Add autofix for PTH116 (#26460) [refurb] Restrict delete-full-slice to lists (FURB131) (#27711) [refurb] Skip FURB101 and FURB103 when the open argument is a file descriptor (#27643) Bug fixes Fix InvalidInstruction on Windows CPUs that do not support POPCNT (#27803) [pyflakes] Emit semantic syntax errors in string type de…
Release Notes Released on 2026-08-13. Preview features [pylint] Fix false negatives on negative numbers (PLR6104) (#27251) [pyupgrade] Add rule to replace while 1 with while True (UP048) (#27190) Bug fixes [flake8-bandit] Also check keyword arguments (S602, S603, S607, S609) (#27687) [pylint] Allow continue in finally on Python 3.8 (#27626) [pylint] Fix PLE1307 false positive with bools (#27651) […
Release Notes Released on 2026-08-06. Bug fixes [flake8-pyi] Avoid false positives on singledispatch functions (PYI041) (#27335) Server Register formatting capabilities dynamically to exclude TOML files (#27332) Contributors @MeGaGiGaGon @charliermarsh @epage @sharkdp @ntBre Install ruff 0.16.2 Install prebuilt binaries via shell script curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral…
Release Notes Released on 2026-07-30. Preview features Add an option to opt out of human-readable names (#27160) [flake8-pytest-style] Make fixes safe by default and unsafe only when comments are present (PT018) (#27201) [pyupgrade] Skip fix when a defaulted TypeVar precedes a non-defaulted one (UP040, UP046, UP047) (#27133) [ruff] Fix false positive with unpacked arguments (RUF065) (#26959) Bug f…
Release Notes Released on 2026-07-23. Check out the blog post for a migration guide and overview of the changes! Breaking changes Ruff now enables a much larger set of rules by default (413, up from 59). See the blog post for more details and the new Default Rules page for a full listing of the enabled rules. Note that this is primarily an expansion, but 18 of the more opinionated pycodestyle (E)…
Release Notes Released on 2026-07-16. Preview features [pycodestyle] Add an autofix for E402 (#22212) [refurb] Allow subclassing builtins in stub files (FURB189) (#26812) [ruff] Add rule to replace noqa comments with ruff:ignore (RUF105) (#26423) [ruff] Add rule to use human-readable names in ruff:ignore comments (RUF106) (#26682) [ruff] Add rule to use human-readable names in configuration select…
Release Notes Released on 2026-07-09. Preview features Add --add-ignore for adding ruff:ignore comments (#26346) [flake8-comprehensions] Drop C409 tuple comprehension preview behavior (#25707) Avoid whitespace normalization when formatting comments (#26455) [pyupgrade] Lint and fix use of deprecated abc decorators (UP051) (#26417) Bug fixes Refine non-empty f-string detection (#26526) Detect synta…
Release Notes Released on 2026-06-25. Preview features Allow human-readable names in rule selectors (#25887) Emit a warning instead of an error for unknown rule selectors (#26113) Match noqa shebang handling in ruff:ignore comments (#26286) [ruff] Remove pytest-fixture-autouse (RUF076) (#26240, #26371) Documentation Add versioning sections to custom crate READMEs (#26317) Update ruff_python_parser…
Release Notes Released on 2026-06-23. Preview features Support human-readable names when hovering suppression comments and in code actions (#26114) Bug fixes Fall back to default settings when editor-only settings are invalid (#26244) Fix panic when inserting text at a notebook cell boundary (#26111) Rule changes [pylint] Update fix suggestions for __floor__, __trunc__, __length_hint__, and __matm…
Release Notes Released on 2026-06-18. Preview features Handle nested ruff:ignore comments (#25791) Stop displaying severity in output (#26050) Use human-readable names in CLI output (#25937) Use human-readable names in LSP and playground diagnostics (#26058) [pydocstyle] Prevent property docstrings starting with verbs (D421) (#23775) [flake8-pyi] Extend PYI033 to Python files (#26129) Bug fixes De…
Release Notes Released on 2026-06-11. Preview features Allow human-readable names in suppression comments (#25614) Fix handling of ignore comments within a disable/enable pair (#25845) Prioritize human-readable names in CLI output (#25869) Respect diagnostic start and parent ranges and trailing comments in ruff:ignore suppressions (#25673) [flake8-async] Add trio.as_safe_channel to safe decorators…
Release Notes Released on 2026-06-04. Preview features [flake8-async] Implement yield-in-context-manager-in-async-generator (ASYNC119) (#24644) [pylint] Narrow diagnostic range and exclude cases without exception handlers (PLW0717) (#25440) [ruff] Treat yield before break from a terminal loop as terminal (RUF075) (#25447) Bug fixes [eradicate] Avoid flagging ruff:ignore comments as code (ERA001) (…
Release Notes Released on 2026-05-28. Preview features Fix Markdown closing fence handling (#25310) [pyflakes] Report duplicate imports in typing.TYPE_CHECKING block (F811) (#22560) Bug fixes [pyflakes] Treat function-scope bare annotations as locals per PEP 526 (F821) (#21540) Performance Avoid redundant TokenValue drops in the lexer (#25300) Reduce memory usage by dropping token-excess capacity…
Release Notes Released on 2026-05-21. Preview features [airflow] Implement airflow-task-implicit-multiple-outputs (AIR202) (#25152) [flake8-use-pathlib] Mark PTH101 fix as unsafe when first argument is a class attribute annotated as int (#25086) [pylint] Implement too-many-try-statements (W0717) (#23970) [ruff] Add incorrect-decorator-order (RUF074) (#23461) [ruff] Add fallible-context-manager (RU…
Release Notes Released on 2026-05-14. Preview features Add a rule to flag lazy imports that are eagerly evaluated (#25016) [pylint] Standardize diagnostic message (PLR0914, PLR0917) (#24996) Bug fixes Fix F811 false positive for class methods (#24933) Fix setting selection for multi-folder workspace (#24819) [eradicate] Fix false positive for lines with leading whitespace (ERA001) (#25122) [flake8…
Release Notes Released on 2026-04-24. Preview features Implement #ruff:file-ignore file-level suppressions (#23599) Implement #ruff:ignore logical-line suppressions (#23404) Revert preview changes to displayed diagnostic severity in LSP (#24789) [airflow] Implement task-branch-as-short-circuit (AIR004) (#23579) [flake8-bugbear] Fix break/continue handling in loop-iterator-mutation (B909) (#24440)…
Release Notes Released on 2026-04-16. Preview features [ruff] Ignore RUF029 when function is decorated with asynccontextmanager (#24642) [airflow] Implement airflow-xcom-pull-in-template-string (AIR201) (#23583) [flake8-bandit] Fix S103 false positives and negatives in mask analysis (#24424) Bug fixes [flake8-async] Omit overridden methods for ASYNC109 (#24648) Documentation [flake8-async] Add ove…