astral-sh/ruff 0.16.9

on GitHub

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)
• [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

Install ruff 0.16.9

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-installer.ps1 | iex"

Download ruff 0.16.9

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>