ccheney

Design or review backend domain and dependency boundaries using DDD, Clean Architecture, and ports/adapters. Use for aggregate modeling, bounded contexts, use-case isolation, or architecture refactoring; not routine CRUD changes.

Write or review PostgreSQL schemas, queries, migrations, and Drizzle ORM code. Use for Postgres/Drizzle relations, indexing, pooling, or query performance; not for unrelated databases or generic backend work.