Architecture Patterns

Architecture Patterns Skill

Master Clean Architecture, Hexagonal Architecture, and Domain-Driven Design for maintainable backend systems.

Overview

This skill provides comprehensive guidance on implementing proven backend architecture patterns that separate concerns, improve testability, and create maintainable codebases.

When to Use

• Designing new backend systems from scratch
• Refactoring monolithic applications
• Establishing architecture standards for your team
• Migrating to loosely coupled architectures
• Implementing domain-driven design principles
• Creating testable and mockable codebases
• Planning microservices decomposition

Core Patterns

Clean Architecture (Uncle Bob)

• Dependencies point inward
• Entities, Use Cases, Interface Adapters, Frameworks & Drivers
• Business logic independent of frameworks
• Testable without UI or database

Hexagonal Architecture (Ports and Adapters)

• Domain core with business logic
• Ports define interfaces
• Adapters implement ports (database, REST, etc.)
• Swap implementations easily for testing

Domain-Driven Design (DDD)

• Bounded Contexts and Context Mapping
• Entities with identity
• Value Objects (immutable)
• Aggregates as consistency boundaries
• Repositories for data access
• Domain Events

Auto-Trigger Keywords

• clean architecture
• hexagonal architecture
• domain driven design
• DDD patterns
• ports and adapters
• dependency inversion
• use cases
• repository pattern
• value objects
• aggregates
• bounded contexts

Source

Adapted from wshobson/agents