Use when creating application layer artifacts for a NestJS bounded context — use cases, CQRS command/query handlers, DTOs, ports (cross-module interfaces), application services, or read model projections. Supports three patterns: plain UseCase (A), CQRS native (B), and Handler-as-Orchestrator (C).
Use when creating domain layer artifacts for a NestJS bounded context — entities (AggregateRoot), value objects, domain events, repository interfaces, domain services, validators, or data builders. Covers Hexagonal Architecture + DDD patterns with NestJS CQRS native event support.