Sourced from ty's releases.

0.0.29

Release Notes

Released on 2026-04-05.

Bug fixes

• Avoid special-casing for dataclasses.field if it's not in field_specifiers (#24397)
• Reject unsupported environment.python-version values in configuration files (#24402)
• Respect supported lower bounds from requires-python (#24401)

Core type checking

• Add support for types.new_class (#23144)
• Fix PEP 695 type aliases in with statement (#24395)
• Respect __new__ and metaclass __call__ return types (#24357)
• Treat enum attributes with type annotations as members (#23776)

Contributors

• @​charliermarsh
• @​carljm

Install ty 0.0.29

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.29/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.29/ty-installer.ps1 | iex"

Download ty 0.0.29

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

... (truncated)

Sourced from ty's changelog.

0.0.29

Released on 2026-04-05.

Bug fixes

• Avoid special-casing for dataclasses.field if it's not in field_specifiers (#24397)
• Reject unsupported environment.python-version values in configuration files (#24402)
• Respect supported lower bounds from requires-python (#24401)

Core type checking

• Add support for types.new_class (#23144)
• Fix PEP 695 type aliases in with statement (#24395)
• Respect __new__ and metaclass __call__ return types (#24357)
• Treat enum attributes with type annotations as members (#23776)

Contributors

• @​charliermarsh
• @​carljm

0.0.28

Released on 2026-04-02.

Bug fixes

• Mark loop header assignments as used to avoid false positives in "unused variable" diagnostics (#24336)

LSP server

• Show constructor signature of classes when hovering over them (#24257)

Core type checking

• Avoid emitting cascading diagnostics when parsing invalid type expressions (#24326)
• Handle most "deep" mutual TypeVar constraints (#24079)
• Improve consistency and quality of diagnostics relating to invalid type forms (#24325)
• Improve robustness of various type-qualifier-related checks (#24251)
• Infer the extra_items keyword argument to class-based TypedDicts as an annotation expression (#24362)
• Use bidirectional inference to fix false positives on operations such as x: list[int | None] = [None] * 2 (#24197)
• Sync vendored typeshed stubs (#24340). Typeshed diff
• Tighten up validation of subscripts and attributes in type expressions (#24329)
• Use infer_type_expression for parsing parameter annotations and return-type annotations (#24353)
• Use infer_type_expression for validating PEP-613 type aliases (#24370)
• Validate TypedDict fields when subclassing (#24338)
• Validate type qualifiers in functional TypedDict fields and the extra_items keyword to functional TypedDicts (#24360)
• Improve diagnostics for invalid functional TypedDicts (#24345)

... (truncated)

• 438a78d Bump version to 0.0.29 (#3218)
• 927aad2 Bump version to 0.0.28 (#3206)
• 29d288e Publish installers to /installers/ty/latest on the mirror (#3202)
• 5c9e342 Bump version to 0.0.27 (#3185)
• e6a5731 Update actions/cache action to v5.0.4 (#3172)
• c47b982 Update prek dependencies (#3173)
• 657abcf Update astral-sh/setup-uv action to v8 (#3174)
• 9e582cb Fetch the cargo-dist binary directly instead of using the installer (#3160)
• d5c51ea docs: use content tabs (#3146)
• 9893776 Use the release environment in publish-docs (#3147)
• Additional commits viewable in compare view