Sourced from ty's releases.

0.0.26

Release Notes

Released on 2026-03-26.

Bug fixes

• Prevent "too many cycle iteration" panics in more situations (#24061)
• Fix false positives and false negatives when unpacking a union of tuples into a function call (#23298)

Core type checking

• Add support for typing.Concatenate (#23689)
• Validate the return type of generator functions (#24026)
• Support dataclass field converters (#23088)
• Disallow Self in metaclass and static methods (#23231)
• Improve call inference for keyword-only dict() (#24103)
• Respect non-explicitly defined dataclass_transform params (#24170)
• Unconditionally silence diagnostics in unreachable code (#24179)
• Respect terminal-function-call narrowing in global scope (#23245)

Performance

• Fix performance regression for narrowing on a larger Literal type(#24185)

Contributors

• @​sharkdp
• @​Glyphack
• @​charliermarsh
• @​mtshiba
• @​dhruvmanila
• @​carljm
• @​choucavalier

Install ty 0.0.26

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.26/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.26/ty-installer.ps1 | iex"

Download ty 0.0.26

... (truncated)

Sourced from ty's changelog.

0.0.26

Released on 2026-03-26.

Bug fixes

• Prevent "too many cycle iteration" panics in more situations (#24061)
• Fix false positives and false negatives when unpacking a union of tuples into a function call (#23298)

Core type checking

• Add support for typing.Concatenate (#23689)
• Validate the return type of generator functions (#24026)
• Support dataclass field converters (#23088)
• Disallow Self in metaclass and static methods (#23231)
• Improve call inference for keyword-only dict() (#24103)
• Respect non-explicitly defined dataclass_transform params (#24170)
• Unconditionally silence diagnostics in unreachable code (#24179)
• Respect terminal-function-call narrowing in global scope (#23245)

Performance

• Fix performance regression for narrowing on a larger Literal type(#24185)

Contributors

• @​sharkdp
• @​Glyphack
• @​charliermarsh
• @​mtshiba
• @​dhruvmanila
• @​carljm
• @​choucavalier

0.0.25

Released on 2026-03-24.

Breaking changes

• Support type:ignore[ty:code] suppressions (#24096)

Bug fixes

• Avoid eager TypedDict diagnostics in TypedDict | dict unions (#24151)
• Fix Salsa panic propagation (#24141)
• Fix folding ranges of comments separated by statements (#24132)
• Fix loop-header reachability cycles in conditional unpacking (#24006)
• Fix subtyping of intersections containing NewTypes of unions vs. unions (#24087)
• Fix untracked reads in Salsa queries that can lead to backdating panics (#24051)

... (truncated)

• 9403051 Bump version to 0.0.26 (#3145)
• d60899a Bump version to 0.0.25 (#3125)
• db65b3e Update documentation to reflect type:ignore changes (#3121)
• 9e46432 Use ty in Emacs with Eglot (#3107)
• 1f30d7c Update artifact github actions dependencies (#3113)
• 255ef63 Revert "Update Artifact GitHub Actions dependencies" (#3112)
• 5fe54ca Update Artifact GitHub Actions dependencies (#3108)
• a0cf1e7 Update Swatinem/rust-cache action to v2.9.1 (#3110)
• fd2acb4 Update prek dependencies (#3109)
• 8762330 Bump version to 0.0.24 (#3084)
• Additional commits viewable in compare view

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