ty 0.0.67

on Python PyPI

Release Notes

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

Install ty 0.0.67

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.67/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.67/ty-installer.ps1 | iex"

Download ty 0.0.67

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ty

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>