astral-sh/ty 0.0.77

on GitHub

Release Notes

Released on 2026-08-31.

Bug fixes

• Bound recursive protocol traversal in generic intersections (#28215)
• Preserve recursion guards across nested type operations (#28150)
• Preserve syntax and comments when removing redundant casts (#28145)
• Stabilize recursive receiver inference (#28042)
• Stabilize condition truthiness during cyclic inference (#28212)

Core type checking

• Preserve generic receivers in implicit __init_subclass__ calls (#28138)
• Preserve specialization for inherited TypedDict methods (#28111)
• Propagate deletions through nested loop headers (#28044)

Performance

• Avoid repeated inference for literal union call results (#28196)

Contributors

• @charliermarsh
• @carljm

Install ty 0.0.77

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.77/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.77/ty-installer.ps1 | iex"

Download ty 0.0.77

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>