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Upgrading ruff 0.14 to 0.15

Breaking0.14.14 → 0.15.22Breaking9New71Changed131Fixed115Other103

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BreakingUpgrade verdict

9 breaking changes.

In plain terms
  • Function type parameter defaults must now follow the required ordering rules.
  • Ruff no longer treats .qmd files as Markdown out of the box. You can turn it back on with a configuration option.
  • When configuration files extend others, Ruff now reads all of them before choosing a default Python version.
  • The RUF076 lint rule has been removed, so configurations referencing it must be updated.
Must act Top 3 of 9 that need code or config changes

What you must change

Breaking9
Validates the default order of function type parameters.
0.15.18GitHub ReleaseSummarizedView source
Drops explicit support for the .qmd file extension; enable it via the extension setting instead.
extension
0.15.3GitHub ReleaseSummarizedView source
Ruff now resolves all extended configuration files before falling back on a default Python version.
extend
0.15.0GitHub ReleaseSummarizedView source
Removes the pytest-fixture-autouse rule (RUF076).
RUF076pytest-fixture-autouse
0.15.20GitHub ReleaseSummarizedView source
Rejects parenthesized star imports in the parser.
0.15.18GitHub ReleaseSummarizedView source
Rejects starred comprehension targets in the parser.
0.15.18GitHub ReleaseSummarizedView source
Rejects unparenthesized generator expressions in class bases.
0.15.18GitHub ReleaseSummarizedView source
Rejects yield expressions after commas.
0.15.18GitHub ReleaseSummarizedView source
Ruff now formats code according to the 2026 style guide, changing formatter output.
0.15.0GitHub ReleaseSummarizedView source