Spring Data Jpa

This gives Claude patterns for building persistence layers with Spring Data JPA, covering repositories, entity relationships, queries, pagination, auditing, and transactions. Use it when you're wiring up CRUD operations, writing custom queries with @Query annotations, or setting up things like cascade behavior and database auditing. The validation steps are practical, like running EXPLAIN ANALYZE on queries and testing cascade operations before production. The warnings about N+1 queries and never exposing JPA entities directly in REST APIs are the kind of mistakes that burn you in production. Good for getting a Spring Data JPA layer up without stepping on the common landmines.