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chore(deps): update dependency ty to >=0.0.19#334

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chore(deps): update dependency ty to >=0.0.19#334
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renovate/ty-0.x

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@renovate renovate bot commented Feb 10, 2026 •
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This PR contains the following updates:

Package Change Age Confidence
ty (changelog) >=0.0.15 → >=0.0.19 age confidence

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Release Notes

astral-sh/ty (ty)

v0.0.19

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Released on 2026-02-26.

Bug fixes
  • Fix panic in diagnostic rendering when attempting to render a code frame pointing to leading whitespace (#​23458)
  • Fix panics and incorrect inference stemming from incorrectly considering overloads in another file as being associated with a function in the file being checked (#​21977)
  • Fix panic when attempting to narrow the type of a dictionary key that was assigned using a multi-target assignment, e.g. x = y = {"a": 1} (#​23523)
  • Fix infinite hang on mutually recursive TypeAliasType definitions (#​23397)
LSP server
  • Fix inlay hints for starred unpacking targets (#​23454)
Core type checking
  • Fix assignability, subtyping and equivalence checks relating to typing.Generator prior to Python 3.13 (#​23386)
  • Understand that a scope's control flow terminates after await foo() if foo returns typing.Awaitable[typing.Never] or similar (#​23479)
  • Implement stricter handling of calls to instances of type[T] types (#​23472)
  • Support basic type narrowing for case {...}: patterns in match statements (#​23462)
  • Fix bugs that could manifest in incorrect overload evaluation, false-positive complaints regarding assert_type calls or false-positive redundant-cast diagnostics by reimplementing the equivalence type relation as mutual subtyping of top and bottom materializations (#​23428)
  • Fix equality and __contains__ narrowing with PEP-695 type aliases (#​23545)
  • Support _value_ annotations on enum classes (#​22228)

v0.0.18

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Released on 2026-02-20.

Bug fixes
  • Support classes dynamically created via type(...) with cyclic bases (#​22792)
  • Fix incorrect types inferred when unpacking mixed tuples (#​23437)
  • Fix stack overflow for self-referential TypeOf in annotations (#​23407)
  • Fix several server panics that could occur when computing semantic tokens for the current file (#​23403), #​23398, #​23401)
LSP server
  • Add code folding support (#​23393)
  • Add warning message when running ty server interactively (#​23416)
  • Exclude test-related symbols from non-first-party packages in auto-import completions (#​23252)
  • Fix bug where diagnostics could disappear after opening an external file (#​23447)
  • Remove spurious destination for Go-To Definition on variables defined in a loop (#​23391)
  • Use the fully qualified name when "baking" an inlay hint into the source code if the scope already contains a variable with the same name as the unqualified name (#​23265)
  • Resolve TypeVars in call_signature_details parameter types (#​23149)
CLI
  • Add --output-format to ty version (#​23387)
Configuration
  • Add replace-imports-with-any option (#​23122)
  • Support shellexpand for configuration paths (#​23274)
Type checking
  • Add a new diagnostic to detect invalid class patterns in match statements (#​22939)
  • Allow Self in ClassVar type annotations (#​23362)
  • Consider synthesized methods and ClassVar-qualified declarations when determining whether an abstract method has been overridden in a subclass (#​23381)
  • Add a diagnostic when combining Final and ClassVar (#​23365)
  • Fix return type of assert_never (#​23389)
  • Fix assert_type diagnostic messages (#​23342)
  • Ban PEP-613 type alias values from containing type-qualifier special forms (#​23444)
  • Infer LiteralString for f"{literal_str_a} {literal_str_b}" (#​23346)
  • Infer precise types for bit-shift operations on integer literals (#​23301)
  • Make [abstract-method-in-final-class] diagnostics less verbose for classes with many abstract methods (#​23379)
  • Improve diagnostics for abstract @final classes (#​23376)
  • Only perform literal promotion for implicitly inferred literals (#​23107)
  • Parenthesize callable types when they appear in the return annotation of other callable types (#​23327)
  • Consider a call to a generic function returning Never to terminate control flow (#​23419)
  • Support calls to intersection types (#​22469)
  • Validate annotated assignments to attributes on self (#​23388)
  • Treat a bytes-literal type as a subtype of Sequence[<constituent integers in the bytestring>] (#​23329)
  • Allow a string-literal argument to match against an Iterable parameter in type variable inference. (#​23326)
  • Support narrowing from a Callable type returning a TypeGuard type (#​23280)
Performance
  • Consider all code paths as being ambiguously reachable in cases with pathologically large control-flow graphs (#​23399)
Typeshed
Contributors

v0.0.17

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Released on 2026-02-13.

Bug fixes
  • Avoid Literal promotion for constrained TypeVars with Literal bounds (#​23209)
  • Fix false positives in TypeVar shadowing checks (#​23222)
Core type checking
  • Support generic protocols (#​21902)
  • Perform control-flow analysis in loops (#​22794)
  • Support typing.Self in attribute annotations (#​23108)
  • Support type narrowing in situations with calls to NoReturn functions (#​23109)
  • Support type narrowing and reachability analysis based on os.name checks (#​23230)
  • Detect overrides of Final class variables in subclasses (#​23180)
  • Fix bound method access on None (#​23246)
  • Fix method calls on subclasses of Any (#​23248)
  • Disallow type variables within PEP-695 type variable bounds and constraints (#​22982)
  • Emit error for attribute access on union where some elements lack the attribute (#​23042)
  • Emit error for invalid typevar defaults (#​23194)
  • Improve display of ParamSpecs in some situations (#​23211)
LSP server
  • Add hover and go-to-declaration support for subscript literals (#​22837)
  • Assign lower completion ranking to deprecated names in auto import (#​23188)
  • Improve spans of references to submodules imported in an __init__.py (#​21795)
  • Include conditional symbols (like datetime.UTC) in auto-import in more cases (#​23249)
  • Support auto-import for symbols in inlay hints (#​22111)
  • Include overload declarations in find-references (#​23215)
Performance
  • Avoid UnionBuilder overhead when creating a new union from the filtered elements of an existing union (#​22352)
Other changes
  • Allow discovering dependencies in system Python environments (#​22994)
  • Apply workspace settings to virtual files (#​23228)
  • Add support for --output-format=junit (#​22125)
  • Use a smaller diagnostic range for inconsistent-mro diagnostics (#​23213)
Contributors

v0.0.16

Compare Source

Released on 2026-02-10.

Bug fixes
  • Allow stringified argument in PEP-613 alias to Optional (#​23200)
  • Fix fuzzer panic on slice expression in unclosed comprehension (#​23146)
  • Fix combinatorial explosion due to fixed-length tuple expansion in overload matching (#​23190)
  • Respect @no_type_check when combined with other decorators (#​23177)
  • Fix diagnostic location for an incorrect sub-call to a specialized ParamSpec (#​23036)
LSP server
  • Assign lower completions ranking to deprecated functions and classes (#​23089)
  • Change goto-def for class constructors to always go to class definition (#​23071)
  • Ensure diagnostic mode is consistent across projects inside the LSP server (#​23121)
  • Don't include the class Foo in autocomplete suggestions when the user is typing out Foo's bases (#​23141)
  • Fix parameter references across files via keyword args (#​23012)
  • Fix wrong inlay hints for overloaded function arguments (#​23179)
  • Support diagnostics in newly created files inside neovim (#​23095)
  • Exclude already-included classes when providing completion suggestions for class bases (#​23085)
CLI
  • Add support for TY_OUTPUT_FORMAT environment variable (#​23123)
  • Fall back to python3 found in $PATH if no environment is found (#​22843)
Type checking
  • Add inconsistent-mro autofix to move Generic[] to the end of the bases list (#​22998)
  • Add precise return-type inference for struct.unpack (#​22562, #​23130)
  • Disallow TypeVars within ClassVars (#​23184)
  • Emit diagnostic on unbound call to abstract @classmethod or @staticmethod (#​23182)
  • Fix false-positive diagnostics when providing the total= keyword to TypedDict classes that had PEP-695 type parameters (#​23114)
  • Narrow both left- and right-hand operands where possible (#​23084)
  • Narrow chained operators (#​23093)
  • Narrow equality subscripts on either operand (#​23104)
  • Recognize __dataclass_transform__ to support SQLModel (#​23070)
  • Relax the attribute narrowing condition to support deeper-nested attribute type narrowing (#​22440)
  • Support constrained TypeVar compatibility across function boundaries (#​23103)
  • Support comparison methods (__gt__, etc.) where a parameter is annotated with a Literal type (#​23100)
  • Support partially specialized type context (#​22748)
  • Use type context when inferring constructor argument types (#​23139)
  • Validate TypedDict constructor calls for generic aliases and type[...] targets (#​23113)
Performance
  • Conservative narrowing places optimization (#​22734)
Contributors

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claude bot commented Feb 10, 2026

PR Review

Type: Automated dependency update (dev dependency)

Changes: Updates ty from >=0.0.15 to >=0.0.16

✅ Assessment

  • Clean minor version bump with bug fixes and type checking improvements
  • Dev dependency only - no production code impact
  • Lock file properly synchronized
  • No code changes required

🧪 Verification

CI should confirm compatibility. The update includes:

  • Bug fixes for type checking edge cases
  • LSP server improvements
  • Performance optimizations

Recommendation: ✅ Safe to merge after CI passes

@renovate renovate bot force-pushed the renovate/ty-0.x branch from 863aa09 to 87a38b4 Compare February 12, 2026 10:35
@renovate renovate bot changed the title chore(deps): update dependency ty to >=0.0.16 chore(deps): update dependency ty to >=0.0.17 Feb 13, 2026
@renovate renovate bot force-pushed the renovate/ty-0.x branch from 87a38b4 to d2e50ba Compare February 13, 2026 13:51
@renovate renovate bot changed the title chore(deps): update dependency ty to >=0.0.17 chore(deps): update dependency ty to >=0.0.18 Feb 21, 2026
@renovate renovate bot force-pushed the renovate/ty-0.x branch from d2e50ba to 718b0fc Compare February 21, 2026 00:49
@renovate renovate bot changed the title chore(deps): update dependency ty to >=0.0.18 chore(deps): update dependency ty to >=0.0.19 Feb 26, 2026
@renovate renovate bot force-pushed the renovate/ty-0.x branch from 718b0fc to 9a15af5 Compare February 26, 2026 12:38
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