Topic guides

One page per concept, each one covering the feature in full, the shapes it takes, the edges it has, and the reasoning where the behaviour is not the obvious one.

Read them in order for a complete picture of the library, or jump to the one you need.

• Providers and scopes
• Typed, class-keyed contexts
• Defaults and misses
• The ambient context
• Dependency injection
• Threads and asyncio
• Testing

See also

The API reference is the exhaustive per-name description. The design notes record why the non-obvious decisions went the way they did.