⬆️ deps: Update Python dev dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ruff (source, changelog)	>=0.16.4 → >=0.16.5
ty (changelog)	>=0.0.74 → >=0.0.77

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Release Notes

astral-sh/ruff (ruff)

v0.16.5

Compare Source

Released on 2026-08-27.

Preview features

• Allow rules without codes (#​28049)
• Introduce category selectors (#​27666)
• Update preview default rules and categories (#​27877)

Bug fixes

• [flake8-async] Detect blocking generic HTTP requests (ASYNC210) (#​28024)
• [flake8-datetimez] Allow timezone-safe strptime chains (DTZ007) (#​28023)
• [flake8-simplify] Respect side effects in lambda defaults (SIM401) (#​28000)

Server

• Fix duplicated "of" in ClientOptions doc comment (#​27978)

Documentation

• Document rule acceptance guidelines (#​27910)
• Document the new category selectors (#​27906)

Contributors

• @​AlexWaygood
• @​sharkdp
• @​jelle-openai
• @​charliermarsh
• @​ntBre
• @​aarushkandukoori

astral-sh/ty (ty)

v0.0.77

Compare Source

Released on 2026-08-31.

Bug fixes

• Bound recursive protocol traversal in generic intersections (#​28215)
• Preserve recursion guards across nested type operations (#​28150)
• Preserve syntax and comments when removing redundant casts (#​28145)
• Stabilize recursive receiver inference (#​28042)
• Stabilize condition truthiness during cyclic inference (#​28212)

Core type checking

• Preserve generic receivers in implicit __init_subclass__ calls (#​28138)
• Preserve specialization for inherited TypedDict methods (#​28111)
• Propagate deletions through nested loop headers (#​28044)

Performance

• Avoid repeated inference for literal union call results (#​28196)

Contributors

• @​charliermarsh
• @​carljm

v0.0.76

Compare Source

Released on 2026-08-31.

Preview features

• Add a missing-direct-dependency rule (#​28001)
• Cancel superseded queued uv requests (#​28108)
• Check direct dependencies in PEP 723 scripts (#​28136)
• Fix Goto definition in script dependencies (#​27747)
• Move script environment initialization to the CLI and LSP (#​28038)
• Refresh uv project metadata in the background (#​27933)
• Synchronize PEP 723 script environments in the language server (#​27619)
• Warn when uv metadata cannot support dependency checks (#​28133)

Bug fixes

• Avoid panics on incomplete protocol type parameter lists (#​28088)
• Fix auto-completion panic involving bare declarations (#​28191)
• Guard recursive meta-type expansion (#​28143)
• Preserve parentheses when removing redundant casts (#​28092)

LSP server

• Add "Find references" support for pytest fixtures (#​28075)
• Highlight PEP 723 script metadata as TOML (#​27746)
• Synchronize saved script metadata on open (#​27873)

Core type checking

• Apply mixin specialization when validating enum members (#​28101)
• Bind Self through generic type aliases (#​28117)
• Infer lambda parameters through callable type aliases (#​28109)
• Intersection simplifications with subtype-related generic specializations (#​26880)
• Invalidate member narrowing across loop iterations (#​28009)
• Narrow functional enum members in == and match (#​28103)
• Only treat recursive types with unbounded specializations as fallback cycles (#​27538)
• Preserve Final variance in stubs (#​28119)
• Preserve inferred types for unknown class-decorator results (#​28067)
• Preserve list literal positions in starred unpacking (#​28061)
• Preserve short-circuit reachability for direct conditions (#​28082)
• Preserve type variables in bounded generic defaults (#​28122)
• Reject circular type alias definitions (#​28140)
• Reject class access to generic instance attributes (#​28123)
• Use the subclass receiver when checking method overrides (#​28124)
• Validate declared variance in method signatures (#​28116)

Performance

• Avoid cubic narrowing with repeated assignments and context managers (#​27787)
• Avoid repeated traversal of shared alias arguments (#​28147)
• Reject impossible eager protocol comparisons early (#​28081)

Contributors

• @​AlexWaygood
• @​MichaReiser
• @​charliermarsh
• @​BitWeaverDev
• @​gorewilliams
• @​zsol
• @​malkin0xb8
• @​sharkdp
• @​mtshiba
• @​carljm
• @​lerebear
• @​jamtat

v0.0.75

Compare Source

Released on 2026-08-26.

Preview features

• Initialize PEP 723 script environments in the CLI (#​27544)
• Refresh PEP 723 script environments in watch mode (#​27617)
• Run PEP 723 script synchronization on bounded workers (#​27615)

Bug fixes

• Specialize Self bounds of inherited methods (#​27990)

LSP server

• Add "Go to Definition" support for pytest fixtures (#​27444)

Documentation

• Fix documented Python package build command (#​4384)
• Link untyped-call tracking issue in migration guide (#​4382)

Library support

• Resolve imported pytest fixture exposures (#​27539)
• Resolve installed core pytest fixture providers (#​27770)
• Resolve pytest fixtures through conftest (#​27540)

Diagnostics

• Add more autofixes (#​28029)
• Add a dedicated missing-slot diagnostic (#​28039)
• Explain missing storage for declared slotted attributes (#​27969)
• Improve diagnostic spans for unpacked variable assignments (#​28041)

Core type checking

• Account for known subclasses in equality inference (#​28005)
• Expand ParamSpec signatures inferred from bound receivers (#​28020)
• Fix Self binding in ParamSpec protocols (#​28016)
• Fix TypedDict variance inference (#​28052)
• Fix unsound narrowing through branch-assigned conditions (#​28006)
• Ignore inconsistent binding decorators on overloads (#​28036)
• Infer yield from send/return types from the iterator returned by __iter__ (#​27987)
• Infer tuple type parameters from union arguments (#​28062)
• Infer variance through nonrecursive protocol references (#​28065)
• Preserve bounds of non-literal metaclasses (#​28046)
• Preserve correlated generic-call inference (#​28043)
• Preserve invariant materialization constraints (#​28047)
• Recover bare TypeVarTuples in tuple annotations (#​27950)
• Reject fixed tuples for non-inferable TypeVarTuples (#​27943)
• Reject incompatible constructor context for variadic packs (#​27966)
• Support mixed gradual tuple assignability with TypeVarTuple (#​27957)
• Support tagged union with multiple tags per type (#​27984)
• Sync vendored typeshed stubs (#​28035). Typeshed diff
• Treat typing.Union as a class on Python 3.14+ (#​28003)
• Validate generic protocol variance (#​27531)
• collections.abc.Callable is an instance of type (#​27991)

Contributors

• @​sharkdp
• @​jelle-openai
• @​marcelo-souzaf
• @​AlexWaygood
• @​krzkaczor
• @​carljm
• @​charliermarsh
• @​lerebear
• @​MichaReiser

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