Pydantic V2

Pydantic v2 patterns for production Python: validators (`@field_validator`, `@model_validator`), computed fields, strict types, discriminated unions, settings management, `model_validate` / `model_dump`, `condecimal` and `Annotated[Decimal, ...]` for money, performance tips, and a v1 to v2 migration checklist. Also covers FastAPI integration (response_model serialization, request validation, error envelope customization). TRIGGER WHEN: writing or refactoring Pydantic models in Python 3.10+; migrating a codebase from Pydantic v1 to v2; choosing between `Annotated[Decimal, ...]` vs `condecimal`; hitting v2 performance or serialization surprises; designing FastAPI request/response schemas or error envelopes with Pydantic. DO NOT TRIGGER WHEN: the task is Python testing (use python-tdd), generic typing unrelated to Pydantic (use mypy / typing docs), or non-Python schema work (use typescript-development for Zod / io-ts).

mkdir -p ~/.claude/skills/pydantic-v2
curl -L https://claudskills.com/skills/pydantic-v2/SKILL.md \
  -o ~/.claude/skills/pydantic-v2/SKILL.md

@misc{pydantic-v2-2026,
  author    = {acaprino},
  title     = {Pydantic V2 [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/pydantic-v2/}
}