Who contributed to FastAPI & Pydantic on July 7, 2026?

2 developers shipped this update, including Kropiunig and dependabot[bot].

What were the notable FastAPI & Pydantic updates?

Fix `json_schema_extra` dict being dropped when a callable follows it in `Annotated` (#13374), Remove duplicated `schema_generator` and `mode` entries in `TypeAdapter.json_schema` docstring, and Bump actions/checkout from 6.0.2 to 7.0.0.

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PYDANTIC PATCHES JSON SCHEMA BUG AS FASTAPI SPONSORS EXPAND

By RepoJournal · Filed 06:05 UTC on July 7, 2026 · About FastAPI & Pydantic

2 people shipped this

dependabot[bot] @dependabot[bot] 2 cited

Kropiunig @Kropiunig 1 cited

Pydantic fixed a critical issue where json_schema_extra dicts were silently dropped when followed by callables in Annotated types, a bug that could break schema generation in production.

The fix [1] restores proper handling of json_schema_extra configuration when mixed with callable validators, ensuring your schemas generate correctly. This was paired with a docstring cleanup [2] that removed duplicate parameter descriptions from TypeAdapter.json_schema, clearing up confusion for developers building custom serialization logic. On the infrastructure side, Pydantic's CI pipeline bumped actions/checkout to 7.0.0 [3], which now blocks potentially unsafe fork PR checkouts in pull_request_target workflows, a security hardening that matters if you run untrusted code in CI. The team also updated setup-uv to 8.2.0 [4], adding quiet mode and mirror configuration options for faster, leaner test runs. Over in FastAPI, the project onboarded TutorCruncher as a sponsor [5], signaling continued momentum for the framework's ecosystem.

Action items

→ Update to latest Pydantic if you use json_schema_extra with Annotated validators pydantic/pydantic [plan]
→ Review CI workflows for pull_request_target usage and upgrade actions/checkout pydantic/pydantic [monitor]

References

[1] Fix `json_schema_extra` dict being dropped when a callable follows it in `Annotated` (#13374) pydantic/pydantic
[2] Remove duplicated `schema_generator` and `mode` entries in `TypeAdapter.json_schema` docstring ↗ pydantic/pydantic
[3] Bump actions/checkout from 6.0.2 to 7.0.0 ↗ pydantic/pydantic
[4] Bump astral-sh/setup-uv from 8.1.0 to 8.2.0 ↗ pydantic/pydantic
[5] 🔧 Update sponsors: add TutorCruncher (#15947) fastapi/fastapi

Quick answers

What shipped in FastAPI & Pydantic on July 7, 2026?: Pydantic fixed a critical issue where json_schema_extra dicts were silently dropped when followed by callables in Annotated types, a bug that could break schema generation in production. In total, 4 commits and 9 pull requests landed.
Who contributed to FastAPI & Pydantic on July 7, 2026?: 2 developers shipped this update, including Kropiunig and dependabot[bot].
What were the notable FastAPI & Pydantic updates?: Fix `json_schema_extra` dict being dropped when a callable follows it in `Annotated` (#13374), Remove duplicated `schema_generator` and `mode` entries in `TypeAdapter.json_schema` docstring, and Bump actions/checkout from 6.0.2 to 7.0.0.

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