astral-sh/ruff 0.15.13

on GitHub

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-pyi] Fix false positive for f-string debug specifier (PYI016) (#24098)

Rule changes

• Always include panic payload in panic diagnostic message (#24873)
• Restrict PYI034 for in-place operations to enclosing class (#24511)
• Improve error message for parameters that are declared global (#24902)
• Update known stdlib (#25103)

Performance

• [isort] Avoid constructing glob::Patterns for literal known modules (#25123)

CLI

• Add TOML examples to --config help text (#25013)
• Colorize ruff check 'All checks passed' (#25085)

Configuration

• Increase max allowed value of line-length setting (#24962)

Documentation

• Add D203 to rules that conflict with the formatter (#25044)
• Clarify COM819 and formatter interaction (#25045)
• Clarify that NotImplemented is a value, not an exception (F901) (#25054)
• Update number of lint rules supported (#24942)

Other changes

• Simplify the playground's markdown template (#24924)

Contributors

• @MichaReiser
• @brian-c11
• @Andrej730
• @denyszhak
• @darestack
• @sharkdp
• @charliermarsh
• @EkriirkE
• @eyupcanakman
• @Hrk84ya
• @thernstig
• @ntBre

Install ruff 0.15.13

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.15.13/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.15.13/ruff-installer.ps1 | iex"

Download ruff 0.15.13

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>