https://github.com/pydantic/pydantic-ai/issues/425
https://github.com/pydantic/pydantic-ai/issues/426
https://github.com/pydantic/pydantic-ai/issues/427
https://github.com/pydantic/pydantic-ai/issues/428
https://github.com/pydantic/pydantic-ai/issues/429