astral-sh/ty 0.0.90

on GitHub

Release Notes

Released on 2026-10-20.

Bug fixes

• Allow subclasses to restore hashability (#29471)
• Avoid crashes when negating recursive aliases (#29429)
• Avoid stack overflow for recursive descriptor setter checks (#29467)
• Defer constructor type variable defaults (#29469)
• Preserve bound receivers for strict signature checks (#29396)
• Preserve read types for dynamic attributes (#29461)
• Reject runtime_checkable on non-protocol classes (#29460)
• Validate TypeAliasType keyword arguments (#29466)

LSP server

• Add return-type inlay hints (#29437)

Other changes

• Adopt stable macOS signing identifiers (#4743)
• Avoid inserting inlay hints containing stub-only types (#29477)
• Filter incompatible union members during union inference (#29344)
• Infer ParamSpecs from call-wide constraints (#28828)
• Mitigate pauses from clearing cached ASTs in more language server operations (#29232)
• Report read-only keys when deleting, popping, or defaulting TypedDict items (#29441)
• Support uv's nested module ownership metadata (#29436)

Contributors

• @carljm
• @zsol
• @zanieb
• @ibraheemdev
• @hsusul
• @charliermarsh
• @sharkdp
• @dhruvmanila
• @lerebear

Install ty 0.0.90

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.90/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.90/ty-installer.ps1 | iex"

Download ty 0.0.90

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>