⬆️ deps: Update Python dev dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pre-commit	>=4.6.1 → >=4.6.2
ruff (source, changelog)	>=0.16.1 → >=0.16.2
ty (changelog)	>=0.0.66 → >=0.0.70

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Release Notes

pre-commit/pre-commit (pre-commit)

v4.6.2

Compare Source

==================

Fixes

• Fix language: node hooks that contain "scripts": {"build": ...} with
  npm 11.x.
  • Regressed in 4.6.1.
  • #​3737 issue by @​mheiges.
  • #​3743 PR by @​asottile.

astral-sh/ruff (ruff)

v0.16.2

Compare Source

Released on 2026-08-06.

Bug fixes

• [flake8-pyi] Avoid false positives on singledispatch functions (PYI041) (#​27335)

Server

• Register formatting capabilities dynamically to exclude TOML files (#​27332)

Contributors

• @​MeGaGiGaGon
• @​charliermarsh
• @​epage
• @​sharkdp
• @​ntBre

astral-sh/ty (ty)

v0.0.70

Compare Source

Released on 2026-08-10.

LSP server

• Enable and downrank auto-import completions from stub-only modules (#​27433)
• Fix signature help at end of file (#​27622)
• Normalize type labels in structured docstrings (#​26923)
• Preserve typing-only completion ranking in TYPE_CHECKING blocks (#​27549)

CLI

• Avoid deadlock when scheduling watch checks (#​27605)

Diagnostics

• Add an opt-in unsound-return-statement lint (#​27561)
• Add an opt-in unsound-yield lint (#​27593)
• Diagnose invalid __getattr__ calls (#​27502)
• Diagnose invalid descriptor __get__ calls (#​27400)

Core type checking

• Consider object members in protocol comparisons (#​27532)
• Exclude quantified constraints from semantic type walks (#​27613)
• Expand Generator aliases when evaluating return, send, and yield types (#​27577)
• Infer precise TypedDict key-membership truthiness (#​27579)
• Infer variance through type[T] (#​27534)
• Preserve contextual inference for declarations in loops (#​27594)
• Recognize overlapping NewType types and their underlying values (#​27522)
• Require ClassVar declarations for protocol members (#​27530)
• Stabilize recursive gradual type alias materialization (#​27563)
• Support Annotated inside type[...] (#​27629)
• Validate augmented assignment stores (#​27545)

Contributors

• @​AlexWaygood
• @​carljm
• @​charliermarsh
• @​MichaReiser
• @​lerebear

v0.0.69

Compare Source

Released on 2026-08-06.

Core type checking

• isinstance narrowing for generic classes is now more gradual by default (#​27308)

  This new behavior is more similar to what other major type checkers do. For example:

  def f(xs: object):
      if isinstance(xs, list):
          reveal_type(xs)  # now: `list[Unknown]`, before: `Top[list[Unknown]]`

  Note: you might consider enabling analysis.strict-generic-narrowing
  if you prefer the strictly correct behavior.

Contributors

• @​sharkdp

v0.0.68

Compare Source

Released on 2026-08-05.

Diagnostics

• Preserve property getter call errors (#​27509)
• Simplify numeric tower displays (e.g., float over int | float) (#​27406)
• Suggest closing open TypedDict types for Mapping compatibility (#​27512)

Core type checking

• Avoid double inference of Unpack operands in Union (#​27525)
• Fix panic from mismatched OR-pattern bindings (#​27533)

Contributors

• @​AlexWaygood
• @​charliermarsh
• @​carljm

v0.0.67

Compare Source

Released on 2026-08-05.

LSP server

• Fix unused hints for OR-pattern captures (#​27438)
• Index match-pattern bindings as symbols (#​27260)
• Retain typing-only symbols in explicit completions (#​27435)

Diagnostics

• Preserve called types in intersection diagnostics (#​27475)
• Suppress unimported-reveal diagnostics in stub files and if TYPE_CHECKING blocks (#​27508)

Configuration

• Remove deprecated src.root setting in favor of environment.root (#​27456)

Core type checking

• Check property compatibility when matching class objects to protocols (#​27402)
• Fix constructor calls on narrowed type-variable intersections (#​27493)
• Fix specialization cycle with deferred TypeVar defaults (#​27453)
• Infer generic TypedDicts from unpacked TypedDicts (#​27439)
• Infer generic TypedDicts through synthesized constructor signatures (#​27436)
• Normalize unpacked callable signatures for assignability (#​27450)
• Preserve class type parameters through generic decorators (#​27442)
• Preserve generic class type variables in constructor inference (#​27340)
• Preserve return constraints for object-variadic callables (#​27431)
• Preserve return constraints for top callables (#​27446)
• Recover generic constructor types from failing overloads (#​27460)
• Reject Self with incompatible explicit receiver annotations (#​27454)
• Reject unhashable objects for Hashable protocols (#​27441)
• Reject unsupported dataclass_transform parameters (#​27458)
• Restore bottom callable subtyping for gradual prefixes (#​27519)
• Top-materialize is_dataclass type guard (#​27455)
• Validate constructor calls on unbounded type variables (#​27449)

Performance

• Avoid exponential slowdown copying narrowed TypedDict unions (#​27492)

Contributors

• @​Punisheroot
• @​dhruvmanila
• @​AlexWaygood
• @​sharkdp
• @​MichaReiser
• @​carljm
• @​charliermarsh

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