astral-sh/ty 0.0.87

on GitHub

Release Notes

Released on 2026-10-13.

LSP server

• Clamp notebook cell positions to the end of the cell (#29307)
• Fix deadlock when requests arrive before workspace configuration (#29303)
• Fix notebook cell lookups after cells with cell magics (#29308)
• Fix panic on completions past the end of a notebook's last cell (#29306)

Diagnostic improvements

• Add opt-in mismatched-sentinel-name rule (#27206)
• Deduplicate identical argument type diagnostics (#29337)
• Enable invalid-mutable-override by default (#29335)
• Improve display of distinct string literal types (#29206)
• Respect suppression of attribute override diagnostics (#29327)

Core type checking

• Check overrides of receiver attribute declarations (#28557)
• Infer the default for definitely absent keys in closed TypedDict.get calls (#29136)
• Leave room for later positional arguments when unpacking a variable-length argument (#29293)
• Preserve minimum lengths of unpacked tuple unions (#29331)
• Specialize bare generic class name with type[...] type context (#29248)

Performance

• Avoid constructing nominal complements (#29292)
• Optimize system path equality (#29340)

Contributors

• @charliermarsh
• @AlexWaygood
• @ibraheemdev
• @zsol
• @Amirshox
• @carljm

Install ty 0.0.87

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.87/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.87/ty-installer.ps1 | iex"

Download ty 0.0.87

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>