⬆️ deps: bump Python dev dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ruff (source, changelog)	>=0.17.0 → >=0.17.1
ty (changelog)	>=0.0.86 → >=0.0.89

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Release Notes

astral-sh/ruff (ruff)

v0.17.1

Compare Source

Released on 2026-10-15.

Preview features

• [pycodestyle] Don't treat None, True, or False as keywords (E271-E274) (#​29322)

Bug fixes

• Fix dedent with multiple leading comments (#​29382)
• [flake8-pyi] Detect legacy positional-only parameters in __new__ methods (PYI063) (#​28502)
• [flake8-pyi] Fix false positives on quoted annotations (PYI036) (#​29274)
• [perflint] Avoid invalid comprehension suggestions (PERF401, PERF403) (#​29366)

Rule changes

• Treat more collections and weakref containers as mutable (#​29213)

Documentation

• [flake8-import-conventions] Update default and example aliases (#​29333)

Contributors

• @​fixfon
• @​mmaxjr
• @​joshuavetos
• @​nekomario28
• @​ntBre
• @​shan3520

astral-sh/ty (ty)

v0.0.89

Compare Source

Released on 2026-10-16.

Core type checking

• Added support for return type inference for unannotated functions and methods (#​29253).

  Return type inference is currently disabled by default. Enable it with the analysis.return-type-inference setting in pyproject.toml:

  [tool.ty.analysis]
  return-type-inference = "always"

  Or in ty.toml:

  [analysis]
  return-type-inference = "always"

  Please share your feedback, especially any problems you encounter, in the return type inference feedback issue.

• Sync vendored typeshed stubs (#​29402). Typeshed diff

Bug fixes

• Avoid a panic when negating dynamic type aliases (#​29427)
• Widen tuple literal lengths when other collection elements contain nested tuple types (#​29147)
• Report invalid Generic and Protocol arguments containing nested variadic type variables (#​29146)

Performance

• Speed up generic class-pattern narrowing by skipping impossible intersection comparisons (#​29240)

Contributors

• @​carljm
• @​charliermarsh
• @​sharkdp

v0.0.88

Compare Source

Released on 2026-10-15.

Bug fixes

• Avoid panics and hangs involving recursive type aliases and intersections (#​29057)
• Fix false invalid-mutable-override errors when overriding object attributes (#​29373)
• Fix attribute assignment and deletion checks through bounded or constrained type variables (#​29345)
• Detect instance layout conflicts hidden by additional base classes (#​29372)
• Fix false missing-argument errors when Pydantic models override inherited attributes with ClassVar (#​29367)
• Preserve known module owners when uv reports owners outside the resolution (#​29296)

Diagnostic improvements

• Report assignments to individually frozen Pydantic fields (#​29305)

Core type checking

• Improve type inference for intersection arguments to generic functions (#​28677)
• Preserve inherited annotations for unannotated subclass attributes when a base has type Any or Unknown (#​28973)
• Preserve common return-type structure when gradual arguments match multiple overloads (#​29342)
• Check upper bounds when inferring type variables from caller type variables (#​29014)

Contributors

• @​zaniebot
• @​charliermarsh
• @​zhouzaida
• @​seunghyun-24
• @​zsol
• @​RasmusNygren
• @​carljm

v0.0.87

Compare Source

Released on 2026-10-13.

LSP server

• Clamp notebook cell positions to the end of the cell (#​29307)
• Fix deadlock when requests arrive before workspace configuration (#​29303)
• Fix notebook cell lookups after cells with cell magics (#​29308)
• Fix panic on completions past the end of a notebook's last cell (#​29306)

Diagnostic improvements

• Add opt-in mismatched-sentinel-name rule (#​27206)
• Deduplicate identical argument type diagnostics (#​29337)
• Enable invalid-mutable-override by default (#​29335)
• Improve display of distinct string literal types (#​29206)
• Respect suppression of attribute override diagnostics (#​29327)

Core type checking

• Check overrides of receiver attribute declarations (#​28557)
• Infer the default for definitely absent keys in closed TypedDict.get calls (#​29136)
• Leave room for later positional arguments when unpacking a variable-length argument (#​29293)
• Preserve minimum lengths of unpacked tuple unions (#​29331)
• Specialize bare generic class name with type[...] type context (#​29248)

Performance

• Avoid constructing nominal complements (#​29292)
• Optimize system path equality (#​29340)

Contributors

• @​charliermarsh
• @​AlexWaygood
• @​ibraheemdev
• @​zsol
• @​Amirshox
• @​carljm

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