Immutable
release. Only release title and notes can be modified.
Release Notes
Released on 2026-08-20.
Preview features
- [
flake8-use-pathlib] Add autofix forPTH116(#26460) - [
refurb] Restrictdelete-full-sliceto lists (FURB131) (#27711) - [
refurb] SkipFURB101andFURB103when theopenargument is a file descriptor (#27643)
Bug fixes
- Fix
InvalidInstructionon Windows CPUs that do not supportPOPCNT(#27803) - [
pyflakes] Emit semantic syntax errors in string type definitions asF722(#27835) - [
pylint] Allowos._exitimports inimport-private-name(PLC2701) (#27738)
Rule changes
- [syntax-errors] Align mixed t-string/bytes error message with CPython 3.14 (#27766)
- [
ruff] Addctypes.LittleEndianStructureand 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
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
Install ruff 0.16.4
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.16.4/ruff-installer.sh | shInstall prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.16.4/ruff-installer.ps1 | iex"Download ruff 0.16.4
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/ruffYou 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>