0.66.0

Breaking Changes

• msgspec nullable annotated fields now place None outside Annotated - For msgspec.Struct models, nullable fields that carry Meta/Annotated constraints no longer wrap the type in Optional inside the Annotated[...]. The None member is now emitted as a separate union arm outside the Annotated wrapper, which changes the generated type hints and the resulting imports (Optional is dropped when no longer needed). This is required for the generated models to validate correctly at runtime under msgspec, but it changes output for existing users. (#3495)

# Before
from typing import Annotated, Optional, Union
name: Union[Annotated[Optional[str], Meta(max_length=5)], UnsetType] = UNSET

# After
from typing import Annotated, Union
name: Union[Annotated[str, Meta(max_length=5)], None, UnsetType] = UNSET

What's Changed

• Update CHANGELOG for 0.65.1 by @dcg-generated-docs[bot] in #3492
• Add MCP Python SDK to Used by list by @koxudaxi in #3494
• Fix msgspec payload runtime compatibility by @koxudaxi in #3495
• Reorder Used by projects by @koxudaxi in #3496
• Fix docs workflow zensical invocation by @koxudaxi in #3497
• Bump the github-actions group with 19 updates by @dependabot[bot] in #3490
• Automate release benchmark docs by @koxudaxi in #3498
• Create release benchmark data PRs by @koxudaxi in #3500
• Update release benchmark data by @dcg-generated-docs[bot] in #3501

Full Changelog: 0.65.1...0.66.0