Release Notes
Released on 2026-07-29.
LSP server
- Support comprehension walruses in IDE features (#26476)
Library support
- Pydantic: Allow mutation of private attributes on frozen models (#27257)
- Pydantic: Synthesize
__replace__for models (#27220)
Diagnostics
- Correct
ParamSpecforwarded-argument diagnostic locations (#27263) - Recover forwarded callable object and constructor sources (#27264)
- Recover forwarded
functools.partialdiagnostic sources (#27265)
Core type checking
- Fix gradual class assignability with generic receivers (#27223)
- Lazily materialize protocol attributes (#27267)
- Narrow tagged unions through all type kinds (#27226)
- Prefer static constrained TypeVar solutions (#27057)
- Preserve frozen-dataclass setter delegation (#27217)
- Preserve inference when filtering constructor overloads (#27254)
- Reject frozen-dataclass field deletion through subclasses (#27001)
- Stabilize recursive type-constraint ordering (#27176)
- Support materialized class type expressions (#27258)
Performance
- Avoid quadratic inference for large literal unions (#27178)
- Cache protocol receiver binding (#27301)
Contributors
Install ty 0.0.65
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.65/ty-installer.sh | shInstall prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.65/ty-installer.ps1 | iex"Download ty 0.0.65
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/tyYou 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>