serialization

Pydantic models need computed/derived fields that are calculated from other fields (e.g., full_name from first/last, formatted dates, masked API keys). Also need custom serialization (snake_case to ca...

Pydantic v2 `bytes` fields serialize text-like content to JSON fine but raise `PydanticSerializationError: invalid utf-8 sequence` for actual binary data. This surfaces only when `model_dump_json()` i...

Base64Bytes validates input by attempting to base64-decode it. Passing raw binary bytes (e.g. b"\x89PNG...") does not raise a validation error, Pydantic interprets the raw bytes as base64 characters a...