astral-sh/ty 0.0.1-alpha.25

on GitHub

Release Notes

Released on 2025-10-29.

Bug fixes

• Fix bug where ty would think all types had an __mro__ attribute (#20995)
• Fix rare panic with highly cyclic TypeVar definitions (#21059)
• Fix infinite recursion with generic type aliases (#20969)
• Add missing newline before first diagnostic in CLI output (#21058)
• Make the ty server's auto-import feature skip symbols in the current module (#21100)
• Don't provide goto-definition for definitions which are not reexported in builtins (#21127)
• Avoid duplicate diagnostics during multi-inference of standalone expressions (#21056)

Type inference and diagnostics

• Use constructor parameter types as context to inform solving type variables (#21054)
• Consider __len__ when determining the truthiness of an instance of a tuple class or a @final class (#21049)
• Delegate truthiness inference of an enum Literal type to its enum-instance supertype (#21060)
• Improve invalid-argument-type diagnostics where a union type was provided (#21044)

LSP server

• Suggest type_check_only items last in completions (#20910)
• Render import <...> in completions when "label details" isn't supported (#21109)
• Update workspace diagnostic progress every 50ms (#21019)

CLI

• Add --no-progress option to suppress the rendering of a progress bar (#21063)

Contributors

• @ibraheemdev
• @MatthewMckee4
• @BurntSushi
• @mtshiba
• @AlexWaygood
• @MichaReiser
• @decorator-factory

Install ty 0.0.1-alpha.25

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.25/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.25/ty-installer.ps1 | iex"

Download ty 0.0.1-alpha.25