ty 0.0.44

on Python PyPI

Release Notes

Released on 2026-06-04.

Bug fixes

• Avoid treating sys.implementation.version like sys.version_info (#25608)
• Fix anchor point for override diagnostics (#25621)

LSP server

• Show type alias value on hover (#25381)

Performance

• Add caching for pattern match narrowing (#25613)
• Compact retained definition and expression identities (#25606)
• Reuse expression cache for TypedDict union inference (#25643)
• Upgrade Salsa (#25545)

Core type checking

• Enable narrowing for unions of TypedDict (#25188)

Contributors

• @lerebear
• @MichaReiser
• @carljm
• @pierrem964
• @charliermarsh
• @Hugo-Polloli

Install ty 0.0.44

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.44/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.44/ty-installer.ps1 | iex"

Download ty 0.0.44

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>