Bringing uv and ty together

TL;DR: Experimental uv-ty integration is now available, enabling first-class support for Python scripts (on the CLI and in the editor) and a unified uv check command. This is a step towards an integrated Astral toolchain, one that uses a shared understanding of your project to enable entirely new capabilities. At Astral, we build high-performance tools for the Python ecosystem: uv, our package manager; Ruff, our linter and formatter; and ty, our type checker and language server. Historically, each Astral tool has focused on making a different component of Python development more productive. But we see an opportunity to further Python by unifying traditionally separate capabilities into an integrated toolchain. Our vision for the Astral toolchain is simple: while each tool should be individually usable, useful, and interoperable with the rest of the ecosystem, they should be even more capable when used together. Today, we’re announcing an experimental integration between uv and ty, available in preview. uv understands your Python project’s environment and dependencies, while ty understands your code. By combining the two, we can unlock new functionality beyond what either tool can provide individually. First-class support for Python scripts # PEP 723 enables Python scripts to declare their dependencies and Python version requirements through inline metadata. uv already uses this metadata to prepare an environment when running a script. Now, ty can use this metadata to understand your scripts. On both the command line and in the editor, ty now uses inline metadata to discover scripts throughout your project and leverages uv to prepare an environment for each script. These environments allow ty to check your scripts against their declared requirements. Scripts can have different requirements within the same repository. Each script is checked against its own dependency declarations, even if those dependencies or Python requirements differ from the surrounding project. Declare dependencies inline with PEP 723, save to sync with uv, and use ty’s completions, hover information, and Go to Definition capabilities in your editor. Declare dependencies inline with PEP 723, save to sync with uv, and use ty’s completions, hover information, and Go to Definition capabilities in your editor. When the integration is enabled in your editor, ty automatically invokes uv to prepare the script’s environment in the background, which it uses to provide type checking, code …