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@github-actions github-actions released this 23 Jul 11:42
Immutable release. Only release title and notes can be modified.
0.0.63
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Release Notes

Released on 2026-07-23.

Core type checking

  • Handle generic stringified PEP 613 (typing.TypeAlias) type aliases (#27092)
  • Allow equality narrowing across non-final classes (#27031)
  • Allow interpolated string literals to be promoted to str (#27104)
  • Fix double specialization of generic type aliases (#27058)
  • Fix intersections of type and TypeForm (#27099)
  • When narrowing from a match statement leads a variable x to be inferred as A & B, infer the type of x.attr as <type of A.attr> & <type of B.attr> (#27103)

Library support

  • Pydantic: Stricter validation of sub-model fields in lax mode (#27091)
  • Pydantic: Support special underscore parameters in BaseSettings models (#27098)

Performance

  • Avoid exponential narrowing of optional dynamic match subjects (#27100)
  • Avoid normalizing cached absolute file paths (#26998)

Contributors

Install ty 0.0.63

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.63/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.63/ty-installer.ps1 | iex"

Download ty 0.0.63

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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