Module context 

Validation context: current location, collected errors, model settings and user data shared with validators.

Structs

ModelConfig

Per-model settings (Pydantic model_config) that leaf types consult.

ValidationContext

Mutable state threaded through prepare and validate.

Enums

Extra

How unknown input keys are treated (Pydantic extra).

InputKind

Where the input came from; text sources (query strings, forms, path segments) always allow string → scalar coercion, even in strict mode, because they cannot carry typed values.