astral-sh/ty 0.0.98

on GitHub

Release Notes

Released on 2026-11-05.

Bug fixes

• Avoid cubic narrowing for enum OR patterns (#30019)
• Avoid duplicate warnings for unknown rules and override sections (#30028)
• Fix class-pattern exhaustiveness after class identity checks (#30045)
• Fix conditional type and tuple annotations (#29987)
• Prefer active unnamed Conda and Pixi environments (#29974)
• Preserve baseline matches when a rule is renamed (#30040)
• Preserve exception types after tuple truthiness checks (#30018)
• Report invalid module globs once per override pattern (#30031)
• Skip active Conda and Pixi environments during discovery if the environment doesn't contain Python (#30066)

Configuration changes

• Don't fail configuration deserialization on conflicting rule names (#30023)
• Inherit project settings and overrides for PEP 723 scripts (#29793)
• Warn when configuration uses a renamed rule (#30024)

Memory usage improvements

• Reuse callable signatures in function definition checks (#30042)

Other changes

• Retain all successful generic call narrowing attempts (#29666)
• Reuse specialized ancestors in class relations (#29881)
• Support shadowing methods on instances (#29482)
• Warn about renamed rules in ignore comments (#30026)

Contributors

• @carljm
• @sharkdp
• @MichaReiser
• @charliermarsh
• @zaniebot
• @ibraheemdev
• @AlexWaygood

Install ty 0.0.98

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.98/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.98/ty-installer.ps1 | iex"

Download ty 0.0.98

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>