astral-sh/ty 0.0.61

on GitHub

Release Notes

Released on 2026-07-17.

Bug fixes

• Avoid recursive protocol structural comparisons (#26721)

LSP server

• Render Google docstrings as structured Markdown (#26599)

Library support

• Pydantic: Collect field metadata through subscripted generic Annotated aliases (#26885)

Diagnostics

• Avoid extending own-line suppressions in --add-ignore (#26808)

Core type checking

• Derive descriptor setter domains for protocols (#26683)
• Enforce declared receiver TypeVar domains (#26863)
• Infer isinstance results for aliases and type variables (#26961)
• Infer isinstance results for fixed class tuples (#26935)
• Narrow inline list and set membership checks (#26955)
• Narrow tagged unions by tag truthiness (#26887)
• Narrow walrus expression values (#26949)
• Project intersections in to_instance (#26892)
• Remove inferable TypeVar artifacts recursively (#26787)
• Respect mixin receiver domains in method overrides (#26941)
• Support TypeVarTuple and Unpack (#25240)

Performance

• Deduplicate completion labels (#26890)
• Only collect expected types for files open in the editor (#25546)
• Parallelize subtype hierarchy search (#26875)
• Share heap-backed parser names with CharStr (#26594)
• Use the new incremental checker from the ignore crate (#26933)

Contributors

• @MichaReiser
• @denyszhak
• @lerebear
• @dhruvmanila
• @charliermarsh
• @BurntSushi
• @Aethryl
• @carljm
• @ibraheemdev

Install ty 0.0.61

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.61/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.61/ty-installer.ps1 | iex"

Download ty 0.0.61

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>