0.70.0

Breaking Changes

• Preserved additionalProperties value constraints change generated output - JSON Schema additionalProperties (and propertyNames/mapping) value schemas that carry constraints (e.g. minimum/maximum, minLength/maxLength/pattern, array item constraints, allOf-merged primitives) now retain those constraints in the generated model instead of dropping them. This produces new TypeAlias/RootModel/TypeAliasType definitions and changes dict value type hints, so output differs for existing schemas. For example, a mapping value that previously generated dict[str, Literal['fixed']] now generates a dedicated alias preserving the constraints (#3616):

# Before
class DictModel(RootModel[dict[str, Literal['fixed']]]):
    root: dict[str, Literal['fixed']]

# After
DictModelAdditionalProperty = TypeAliasType(
    "DictModelAdditionalProperty",
    Annotated[Literal['fixed'], Field(max_length=100, min_length=1)],
)


class DictModel(RootModel[dict[str, DictModelAdditionalProperty]]):
    root: dict[str, DictModelAdditionalProperty]

What's Changed

• Update CHANGELOG for 0.69.0 by @dcg-generated-docs[bot] in #3613
• Update release benchmark data by @dcg-generated-docs[bot] in #3614
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #3617
• Preserve additionalProperties value constraints by @chuenchen309 in #3616
• Rename a msgspec field named "field" to avoid shadowing the field import by @chuenchen309 in #3615
• Bump the github-actions group with 8 updates by @dependabot[bot] in #3618
• Update types-setuptools requirement from <70,>=67.6.0.5 to >=67.6.0.5,<84 by @dependabot[bot] in #3584

Full Changelog: 0.69.0...0.70.0