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Compile JSON Schema (draft-07, 2019-09, 2020-12) into fast validators with Ajv, report every failure by its instancePath, and use Ajv options to coerce types, apply defaults, and remove unknown properties so incoming JSON is both validated and normalized.

Validates JSON files against their schemas when modified to ensure data integrity.

Open-source Python library from dottxt for structured LLM generation, guaranteeing outputs that match a JSON schema, Pydantic model, regex, grammar, or multiple-choice set during generation across many model backends.

PostToolUse hook that compares a just-edited OpenAPI or JSON Schema document against the version committed in git and warns about backward-incompatible drift — removed OpenAPI paths and removed required properties — so breaking API changes are surfaced before they ship. Advisory only; it never blocks the edit.

A practical walkthrough of structured outputs in the Claude Agent SDK: defining a JSON Schema via the outputFormat option, reading validated structured_output, type-safe schemas with Zod or Pydantic, and handling validation failures.

A source-backed collection for reviewing API contracts before release: OpenAPI drift detection, JSON Schema validation, GraphQL schema checks, Spectral lint review, Pact consumer contract verification, and generated clients or stubs from approved specs.