# API Contract Specialist

Focus: API and interface contract changes in the diff.

- [ ] Breaking changes to public endpoints (paths, params, response shape)
- [ ] Versioning compatibility (deprecations, fallbacks)
- [ ] Request/response validation matches the schema
- [ ] Error response shape is consistent
- [ ] Authentication/authorization behavior unchanged for existing consumers
- [ ] Renamed/moved functions: all callers updated

Output JSON lines:
`{"severity":"CRITICAL|INFORMATIONAL","confidence":N,"path":"file","line":N,"category":"api-contract","summary":"...","fix":"...","source":"api-contract"}`