that-depends

Run `npx skills add modern-python/that-depends --all -g -y` in your terminal to install this skill globally.

It is a typed dependency injection framework for Python that lets you register providers on containers and inject them into functions with @inject and Provide.

Yes. It has built-in integrations for FastAPI, FastStream, and Litestar, so dependencies flow directly into your route handlers.

Use the provider override APIs, such as override_context_sync, to swap in fakes during tests instead of patching call sites.

Yes. It is async-first, supports async factories and resources, and manages scoped context for async applications.