astral-sh/ty 0.0.102

on GitHub

Release Notes

Released on 2026-11-12.

Breaking changes

• Split invalid-return-type into 3 focussed rules; rename empty-body and unsound-return (#29947)

Bug fixes

• Avoid runaway inference for nested calls with union parameters (#30220)
• Fix a panic when simplifying recursive wide unions (#30141)
• Fix a stack overflow when inferring calls that return recursive aliases (#30149)
• Keep callable-local type variables out of enclosing constraints (#30241)
• Preserve Self for unary operators on bounded type variables (#30242)
• Preserve descriptor write contracts in overrides and protocols (#30252)

Diagnostic improvements

• Rename call-abstract-method to abstract-method-call (#30287)
• Rename call-non-callable to not-callable (#30284)
• Rename call-top-callable to call-to-function-with-unknown-signature (#30285)
• Rename dataclass-field-order to invalid-dataclass-field-order (#30289)
• Rename implicit-concatenated-string-type-annotation to implicit-string-concatenation-in-annotation; improve documentation (#30286)
• Warn by default for a single overload (#30214)

Memory usage improvements

• Check unused stub parameters in the surrounding inference (#30251)

Other changes

• Cache alias-preserving binary unions (#30094)
• Share use-def layouts for stub function parameters (#30248)
• Skip unused parameter bindings in stub bodies (#30330)

Contributors

• @MichaReiser
• @charliermarsh
• @carljm
• @AlexWaygood

Install ty 0.0.102

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.102/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.102/ty-installer.ps1 | iex"

Download ty 0.0.102

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>