Update dependency ruff to v0.16.10

[renovate]

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Change	Age	Confidence
ruff (source, changelog)	==0.11.8 → ==0.16.10

---

Release Notes

astral-sh/ruff (ruff)

v0.16.10

Compare Source

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 supported version (#​28907)
• Add ty as a type checker example (#​28906)

Other changes

• Update Rust toolchain to 1.99 and MSRV to 1.97 (#​29047)

Contributors

• @​ntBre
• @​spaceone
• @​HardMax71
• @​charliermarsh

v0.16.9

Compare Source

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)
• [flake8-pyi] Mention stubs in the diagnostic message (PYI002) (#​28542)

Documentation

• Fix horizontal overflow on the rules documentation page (#​28699)
• Update rules table with category information (#​28651)
• [flake8-annotations] Clarify that ANN401 checks return types in addition to arguments (#​28334)
• [flake8-bugbear] Document type-checker interaction (B010) (#​28509)
• [flake8-comprehensions] Document map/generator exception behavior (C417) (#​27794)
• [ruff] Mention related isort settings (RUF022) (#​28719)

Contributors

• @​qinpei-dev
• @​sanjayrohith
• @​ntBre
• @​webdevsamran
• @​zaniebot
• @​ewdurbin
• @​MichaReiser
• @​spaceone
• @​IbrahimKhan12
• @​devtechedge
• @​GruffElixir

v0.16.8

Compare Source

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 or constraints (UP040, UP046, UP047) (#​28505)

Rule changes

• Add support for __lazy_modules__ (#​28459)
• Recognize PEP-728 TypedDict class keywords (#​28533)
• Recognize quoted types in typing.TypeForm (#​28507)
• Support conditional assignment to __lazy_modules__ (#​28491)
• [flake8-type-checking] Prefer lazy imports over TYPE_CHECKING on Python 3.15 and later (TC001, TC002, TC003) (#​28541)
• [pyupgrade] Make the fix for UP040 always unsafe (#​28526)
• [pyupgrade] Stop recommending deprecated ByteString aliases (UP035) (#​28498)
• [ruff, flake8-use-pathlib] Recognize the parent_mode argument (RUF064, PTH103) (#​28528)
• [ruff] Detect \Z in pytest.raises() match patterns (RUF043) (#​28598)

CLI

• Use rule name and code in formatter incompatibility warnings (#​28571)

Configuration

• [flake8-tidy-imports] Add extend-banned-api (#​28644)

Contributors

• @​VedantMadane
• @​alzeph
• @​charliermarsh
• @​fredrikblau
• @​ntBre
• @​zsol
• @​Aniket-a14
• @​r-b-1

v0.16.7

Compare Source

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-member imports (TID254) (#​26584)
• [pylint] Gate ImportCycleError on Python 3.15 (PLW0133) (#​28310)

Rule changes

• Correct D211 and D203 rule conflict diagnostic (#​28444)
• Recognize slice and frozendict generics (#​28477)
• Stop defining __cached__ for Python 3.15 (#​28476)
• [pyupgrade] Stop recommending removed typing.no_type_check_decorator (UP035) (#​28475)

Performance

• Reuse parser name lookups when interning (#​28399)
• Speed up inherited configuration resolution (#​28299)

Documentation

• Fix line-length path in --config example (#​28392)
• Remove the "Who’s Using Ruff?" list (#​28455)

Other changes

• Embed archive checksums in the shell installer (#​28281)

Contributors

• @​The-Compiler
• @​mdiniz97
• @​zsol
• @​gorewilliams
• @​RafaelJohn9
• @​qatcod
• @​zanieb
• @​MichaReiser
• @​ntBre
• @​charliermarsh
• @​nightt5879
• @​jonathandung
• @​jogo-openai

v0.16.6

Compare Source

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, pylint] Recognize builtins.open (ASYNC230, PLW1514) (#​28021)
• [flake8-bugbear] Fix panic on match subjects (B031) (#​27781)
• [flake8-datetimez] Reject tzinfo=None for datetime bounds (DTZ901) (#​28022)
• [flake8-pytest-style] Avoid duplicate PT017 diagnostics (#​27918)
• [ruff] Remove lint.external hint for Ruff-specific suppressions (RUF102) (#​27923)

Rule changes

• [flake8-use-pathlib] Add display-only fix for os.listdir (PTH208) (#​28027)

Documentation

• Add another example and glob reference for lint.per-file-ignores (#​28106)
• Add duplicate work guidance (#​28229)
• [flake8-async] Document thread offloading (ASYNC240) (#​28008)
• [pyupgrade] Clarify default encoding argument handling (UP012) (#​27315)

Other changes

• Allow unary plus in match patterns on Python 3.15 (#​28231)

Contributors

• @​flying-sheep
• @​pikammmmm
• @​fly1d
• @​waterWang
• @​Pierre-Sassoulas
• @​ntBre
• @​jelle-openai
• @​ericbuehl
• @​tjkuson
• @​AbhinavMir
• @​Whning0513
• @​chirizxc

v0.16.5

Compare Source

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 (SIM401) (#​28000)

Server

• Fix duplicated "of" in ClientOptions doc comment (#​27978)

Documentation

• Document rule acceptance guidelines (#​27910)
• Document the new category selectors (#​27906)

Contributors

• @​AlexWaygood
• @​sharkdp
• @​jelle-openai
• @​charliermarsh
• @​ntBre
• @​aarushkandukoori

v0.16.4

Compare Source

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 definitions as F722 (#​27835)
• [pylint] Allow os._exit imports in import-private-name (PLC2701) (#​27738)

Rule changes

• [syntax-errors] Align mixed t-string/bytes error message with CPython 3.14 (#​27766)
• [ruff] Add ctypes.LittleEndianStructure and related types to existing exception (RUF012) (#​27753)
• [syntax-errors] Detect duplicate keyword arguments (#​17804)
• [syntax-errors] Detect parameters declared nonlocal (#​27628)

Server

• Offer display-only fixes and mark safe fixes preferred (#​27807)
• Support pull diagnostics for notebook cells (#​27779)

Documentation

• Add default indicator to rules table (#​27724)
• Fix broken link to Python docs (#​27757)

Other changes

• Fix s390x stacker assembly in release builds (#​27776)
• Guarantee minimum stack size when parsing a module, standalone expression, and suites (#​25464)
• Reduce configuration deserialization code size (#​27924)
• Check packed AST index bounds (#​27849)

Contributors

• @​AbhinavMir
• @​eduardorittner
• @​royb3
• @​MichaReiser
• @​carljm
• @​rosstitmarsh
• @​ntBre
• @​zaniebot
• @​ewdurbin
• @​woodruffw
• @​Sacrimento
• @​lakshayxi
• @​WhiteFox0-0
• @​baltasarblanco

v0.16.3

Compare Source

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)
• [pylint] Fix false positives and negatives with %b format character (PLE1300, PLE1307) (#​27560)
• [pylint] Improve handling of concatenated strings (PLE1300) (#​27659)

Rule changes

• [numpy] Make np.chararray autofix backwards-compatible (NPY201) (#​27527)

Performance

• Enable PGO for Linux x86-64 Ruff releases (#​27570)
• Enable PGO for Linux ARM64 Ruff releases (#​27574)
• Enable PGO for Windows x86-64 Ruff releases (#​27573)
• Enable PGO for macOS ARM64 Ruff releases (#​27572)
• Reduce Expr size to 64 bytes (#​27591)

CLI

• Hyperlink rule codes in ruff check --statistics output (#​27646)

Documentation

• [ruff] Also suggest asyncio.TaskGroup (RUF006) (#​27461)

Other changes

• Use mimalloc v3 (#​27586)

Contributors

• @​Andrej730
• @​alonfaraj
• @​romero-deshaw
• @​Avasam
• @​tjkuson
• @​charliermarsh
• @​chirizxc
• @​saberoueslati
• @​MichaReiser

v0.16.2

Compare Source

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

v0.16.1

Compare Source

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 fixes

• Bump gen-lsp-types to gracefully handle unknown enumeration values in LSP messages (#​27230)
• [flake8-bugbear] Mark range as immutable (B008) (#​27247)
• [flake8-comprehensions] NFKC-normalize keyword names in C408 fix (#​26813)
• [flake8-return] Fix false positive when variable is read in finally clause (RET504) (#​25441)
• [pydocstyle] Skip section detection inside RST directive bodies (D214, D405, D413) (#​23635)
• [refurb] Parenthesize yield arguments in the FURB192 fix (#​27192)

Rule changes

• [flake8-pytest-style] Mark PT022 fixes as unsafe (#​26440)
• [refurb] Mark fixes that remove unknown separators as unsafe (FURB105) (#​27200)

Server

• Fix indexing of excluded nested Ruff workspaces (#​27303)
• Lint TOML files in the LSP (#​26862)

Documentation

• Cover pycon Markdown formatting (#​27153)
• [flake8-bandit] Document TYPE_CHECKING exception (S101) (#​27004)
• [flake8-import-conventions] Document that extend-aliases can override default aliases (#​27191)
• [pylint] Add missing fix safety gotchas for non-augmented-assignment (PLR6104) (#​27250)

Other changes

• Reduce syntax error noise by swallowing dedents like indents (#​27170)
• Vendor latest annotate-snippets (#​27033)

Contributors

• @​bxff
• @​anishgirianish
• @​Avasam
• @​epage
• @​LHMQ878
• @​MichaReiser
• @​ntBre
• @​HarshalPatel1972
• @​mjpieters
• @​joshuavetos
• @​jesco-absolute
• @​vidigoat
• @​baltasarblanco
• @​ribru17
• @​oh-summy
• @​Jayashanker-Padishala

v0.16.0

Compare Source

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.

• Ruff can now format Python code blocks in Markdown files and will do this by default. See the
  documentation for more details.

• Ruff now supports ruff: ignore comments at the ends of lines, like noqa comments, or on the line preceding a diagnostic. For example, these both suppress an unused-import (F401) diagnostic:

  import math  # ruff: ignore[F401]
  
  # ruff: ignore[F401]
  import os

• Fixes are now shown in check and format --check output:

  ❯ ruff format --check .
  unformatted: File would be reformatted
   --> try.md:1:1
    |
  1 | ```python
    - import   math
  2 + import math
  3 | ```
    |
  
  1 file would be reformatted

  This example also shows off the Markdown formatting.

• format --check now supports the same output formats as the linter, including the github and
  gitlab outputs for rendering annotations in CI:

  ❯ ruff format --check --output-format github .
  ::error title=ruff (unformatted),file=try.md,line=2,col=8,endLine=2,endColumn=10::try.md:2:8: unformatted: File would be reformatted

  See the CLI help or documentation for the
  full list of supported formats.

• The filename, location, end_location, fix.edits[].location, and fix.edits[].end_location
  fields in the JSON output format may now be null rather than defaulting to the empty string and
  row 1, column 1, respectively.

Stabilization

The following rules have been stabilized and are no longer in preview:

• airflow3-incompatible-function-signature
  (AIR303)
• missing-copyright-notice
  (CPY001)
• unnecessary-from-float (FURB164)
• sorted-min-max (FURB192)
• implicit-string-concatenation-in-collection-literal
  (ISC004)
• log-exception-outside-except-handler
  (LOG004)
• invalid-bool-return-type
  (PLE0304)
• too-many-positional-arguments
  (PLR0917)
• stop-iteration-return (PLR1708)
• none-not-at-end-of-union
  (RUF036)
• access-annotations-from-class-dict
  (RUF063)
• duplicate-entry-in-dunder-all
  (RUF068)

The following behaviors have been stabilized:

• blind-except (BLE001) is now suppressed when
  the exception is logged via logging methods other than critical, error and exception.
• future-required-type-annotation
  (FA102) now checks for additional PEP 585-compatible
  APIs, such as those from collections.abc.
• f-string-in-get-text-func-call
  (INT001),
  format-in-get-text-func-call
  (INT002), and
  printf-in-get-text-func-call
  (INT003) now check for additional common ways of using the gettext module, such as assigning
  it to builtins._.
• suspicious-url-open-usage
  (S310) now resolves local string literal bindings to avoid more false positives.
• snmp-insecure-version (S508) and
  snmp-weak-cryptography (S509) now
  support the recommended API from newer versions of PySNMP.
• typing-text-str-alias (UP019) now
  recognizes typing_extensions.Text in addition to typing.Text.

Preview features

• [pyupgrade] Fix false positive with TypeVar default before Python 3.13 (UP040) (#​26888)

Bug fixes

• [ruff] Fix missing check on unrecognized early bound (RUF016) (#​26986)

Rule changes

• Insert a space after the colon in Ruff suppression comments (#​27123)

Performance

• [pyupgrade] Speed up unnecessary-future-import (UP010) (#​27047)

Documentation

• [ruff] Add missing period in "Why is this bad?" section (RUF200) (#​26930)
• [flake8-simplify] Clarify os.environ behavior on Windows (SIM112) (#​26972)
• [pydocstyle] Document fix safety (D400) (#​26971)

Contributors

• @​jonathandung
• @​Joosboy
• @​MichaReiser
• @​Andrej730
• @​ntBre
• @​zaniebot

v0.15.22

Compare Source

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 selectors (RUF201) (#​26772)

Bug fixes

• [flake8-pyi] Fix false positive in __all__ (PYI053) (#​26872)

Rule changes

• [pylint] Ignore mutable type updates in redefined-loop-name (PLW2901) (#​25733)

Performance

• Avoid redundant lexer token bookkeeping (#​26765)
• Avoid redundant pending-indentation writes (#​26774)
• Avoid unnecessary identifier lookahead (#​26525)
• Reuse parser scratch buffers (#​26798)

Documentation

• Document argfile support (#​26803)
• [flake8-datetimez] Clarify naming guidance for datetime.today (DTZ002) (#​26658)
• [pycodestyle] Document E731 fix safety (#​26847)
• [ruff] Clarify intentional async contexts for unused-async (RUF029) (#​26641)

Contributors

• @​dwego
• @​MichaReiser
• @​Joosboy
• @​KaufmanDmitriy
• @​PeterJCLaw
• @​ntBre
• @​charliermarsh

Install ruff 0.15.22

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.15.22/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.15.22/ruff-installer.ps1 | iex"

Download ruff 0.15.22

File	Platform	Checksum
ruff-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
ruff-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
ruff-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
ruff-i686-pc-windows-msvc.zip	x86 Windows	checksum
ruff-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
ruff-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
ruff-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
ruff-powerpc64-unknown-linux-gnu.tar.gz	PPC64 Linux	checksum
ruff-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE Linux	checksum
ruff-riscv64gc-unknown-linux-gnu.tar.gz	RISCV Linux	checksum
ruff-s390x-unknown-linux-gnu.tar.gz	S390x Linux	checksum
ruff-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum
ruff-armv7-unknown-linux-gnueabihf.tar.gz	ARMv7 Linux	checksum
ruff-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
ruff-i686-unknown-linux-musl.tar.gz	x86 MUSL Linux	checksum
ruff-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum
ruff-arm-unknown-linux-musleabihf.tar.gz	ARMv6 MUSL Linux (Hardfloat)	checksum
ruff-armv7-unknown-linux-musleabihf.tar.gz	ARMv7 MUSL Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ruff

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>

v0.15.21

Compare Source

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 syntax errors in individual notebook cells (#​26419)
• [flake8-implicit-str-concat] Fix ISC003 autofix incorrectly stripping + from comments (#​26554)

Rule changes

• [flake8-executable] Mark EXE004 fix as unsafe (#​26033)
• [flake8-pyi] Mark PYI061 fixes as unsafe in Python files (#​26533)
• [pydocstyle] Skip overload-with-docstring in stub files (D418) (#​26318)

Performance

• Avoid per-token source index visitor calls (#​26506)
• Cache parenthesized expression boundaries in the formatter (#​26344)
• Improve performance of rendering edits in preview mode (#​26565)
• Inline fits_element in formatter (#​26429)
• Inline formatter printing hot paths (#​26504)
• Lazily create builtin bindings (#​26510)
• Skip empty trivia scans in the source indexer (#​26507)
• Use ICF for macOS release builds (#​25780)

Formatter

• Add --extend-exclude to ruff format (#​26372)

Documentation

• Add "How does Ruff's import sorting compare to isort?" link to README (#​26530)
• Fix Mozilla Firefox repository link in README (#​26537)
• [flake8-bandit] Fix misleading docstring for mako-templates (S702) (#​26432)
• [ruff] Fix non-triggering example for if-key-in-dict-del (RUF051) (#​26433)

Contributors

• @​EkriirkE
• @​tingerrr
• @​s-rigaud
• @​nikolauspschuetz
• @​Avasam
• @​ntBre
• @​omar-y-abdi
• @​AlexWaygood
• @​sylvestre
• @​shaanmajid
• @​lerebear
• @​baltasarblanco
• @​Sanjays2402
• @​ZedThree
• @​servusdei2018
• @​charliermarsh
• @​jesco-absolute
• @​velikodniy
• @​zaniebot
• @​epage

v0.15.20

Compare Source

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 README for crates.io (#​26315)
• [perflint] Clarify that PERF402 applies to any iterable (#​26242)

Contributors

• @​dhruvmanila
• @​MichaReiser
• @​ntBre
• @​trilamsr

v0.15.19

Compare Source

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 __matmul__ variants (PLC2801) (#​26239)

Performance

• Avoid allocating when parsing single string literals (#​26200)
• Avoid reallocating singleton call arguments (#​26223)
• Lazily create source files for lint diagnostics (#​26226)
• Optimize formatter text width and indentation (#​26236)
• Reserve capacity for builtin bindings (#​26229)
• Skip repeated-key checks for singleton dictionaries (#​26228)
• Use ArrayVec for qualified name segments (#​26224)

Documentation

• [flake8-pyi] Note that PYI051 is an opinionated stylistic rule (#​26179)
• [pyupgrade] Clarify UP029 as a Python 2 compatibility rule (#​26243)

Other changes

• Publish Ruff crates to crates.io (#​26271)

Contributors

• @​MakenRosa
• @​MichaReiser
• @​trilamsr
• @​ntBre
• @​sanjibani
• @​charliermarsh

v0.15.18

Compare Source

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

• Detect equivalent numeric mapping keys (#​26009)
• Detect mapping keys equivalent to booleans (#​25982)
• Detect repeated signed and complex dictionary keys (#​26007)

Rule changes

• [flake8-pyi] Rename PYI033 to legacy-type-comment (#​26131)

Performance

• Use ThinVec for call keywords (#​25999)
• Inline parser recovery context checks (#​26038)
• Match parser keywords as bytes (#​26037)
• Move value parsing out of lexing (#​25360)

Server

• Render subdiagnostics and secondary annotations as related information (#​26011)

Documentation

• Update fix availability for always-fixable rules (#​26091)
• [flake8-tidy-imports] Add fix safety section (TID252) (#​17491)

Parser

• Reject __debug__ lambda parameters (#​26022)
• Reject _ as a match-pattern target (#​25977)
• Reject multiple starred names in sequence patterns (#​25976)
• Reject parenthesized star imports (#​26021)
• Reject starred comprehension targets (#​26023)
• Reject unparenthesized generator expressions in class bases (#​25978)
• Reject yield expressions after commas (#​26024)
• Validate function type parameter default order (#​25981)

Playground

• Make diagnostic links clickable (#​26104)
• Use diagnostic tags (#​26105)

Contributors

• @​AlexWaygood
• @​ntBre
• @​gtkacz
• @​MichaReiser
• [@​charliermarsh](htt

❗ Important

✂ PR body was truncated to here.

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.