Architecture Patterns skill: what it does and how to install it

What it does. Structures backend services around framework-independent domain models, inward-facing dependencies, ports and adapters, use cases, bounded contexts and domain-driven design patterns. It defines interfaces and test boundaries, including in-memory adapters for testing business logic without databases or networks.

When to use it. For new services, monolith refactoring, bounded-context design, dependency-cycle debugging and separating business logic from infrastructure or HTTP concerns. It also addresses aggregates, value objects, repositories and domain events.