astral-sh/ty 0.0.24

on GitHub

Release Notes

Released on 2026-03-19.

Bug fixes

• Ensure TypedDict subscripts for unknown keys return Unknown (#23926)
• Fix overflow with recursive TypeIs (#23784)
• Fix variance of frozen dataclass-transform models (#23931)

LSP server

• Improve semantic token classification for attribute access on union types (#23841)

Core type checking

• Improve performance and correctness by avoiding inferring intersection types for call arguments as a result of bidirectional inference (#23933)
• Narrow keyword arguments when unpacking dictionary instances (#23436)
• Discover /usr/local/lib dist-packages on Debian/Ubuntu (#23797)
• Sync vendored typeshed stubs (#23963). Typeshed diff

Install ty 0.0.24

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.24/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.24/ty-installer.ps1 | iex"

Download ty 0.0.24

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>