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@github-actions github-actions released this 12 Jul 20:22
Immutable release. Only release title and notes can be modified.
0.0.59
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Release Notes

Released on 2026-07-12.

Bug fixes

  • Guard descriptor classification cycles (#26690)
  • Respect init=False in dataclass field-order checks (#26749)
  • Avoid duplicate diagnostics for overloaded TypeIs (#26716)

Library support

  • Pydantic: Support custom __init__ methods (#26699)
  • Pydantic: Support field metadata in Annotated (#26650)

Core type checking

  • Allow unsound equality-based narrowing for builtins (#26414)
  • Bind Self in implicit dunder calls (#26711)
  • Correct protocol method receiver binding (#26701)
  • Exempt ParamSpec callables from the dunder descriptor heuristic (#26696)
  • Remove transitive TypeVar artifacts during collection inference (#26714)

LSP server

  • Avoid broad invalidation from file check eligibility (#26741)
  • Correct how we expand tabs in docstrings (#26679)
  • Resolve ambiguity in Google-style docstring parsing in favour of observations from popular projects (#26673)

CLI

  • Avoid allocation for every stdout write (#26698)
  • Buffer diagnostic output (#26702)

Performance

  • Cache generic context (#26745)
  • Cache known class instances (#26746)
  • Reuse common TypedDict constraints through intersections (#26747)
  • Use purpose-specific types for completion and module text (#26664)

Contributors

Install ty 0.0.59

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.59/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.59/ty-installer.ps1 | iex"

Download ty 0.0.59

File Platform Checksum
ty-aarch64-apple-darwin.tar.gz Apple Silicon macOS checksum
ty-x86_64-apple-darwin.tar.gz Intel macOS checksum
ty-aarch64-pc-windows-msvc.zip ARM64 Windows checksum
ty-i686-pc-windows-msvc.zip x86 Windows checksum
ty-x86_64-pc-windows-msvc.zip x64 Windows checksum
ty-aarch64-unknown-linux-gnu.tar.gz ARM64 Linux checksum
ty-i686-unknown-linux-gnu.tar.gz x86 Linux checksum
ty-powerpc64-unknown-linux-gnu.tar.gz PPC64 Linux checksum
ty-powerpc64le-unknown-linux-gnu.tar.gz PPC64LE Linux checksum
ty-riscv64gc-unknown-linux-gnu.tar.gz RISCV Linux checksum
ty-s390x-unknown-linux-gnu.tar.gz S390x Linux checksum
ty-x86_64-unknown-linux-gnu.tar.gz x64 Linux checksum
ty-armv7-unknown-linux-gnueabihf.tar.gz ARMv7 Linux checksum
ty-aarch64-unknown-linux-musl.tar.gz ARM64 MUSL Linux checksum
ty-i686-unknown-linux-musl.tar.gz x86 MUSL Linux checksum
ty-x86_64-unknown-linux-musl.tar.gz x64 MUSL Linux checksum
ty-arm-unknown-linux-musleabihf.tar.gz ARMv6 MUSL Linux (Hardfloat) checksum
ty-armv7-unknown-linux-musleabihf.tar.gz ARMv7 MUSL Linux checksum

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>
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