Architecture Patterns

• Single responsibility boundaries
• Interface contracts and type safety
• Dependency injection patterns
• Module cohesion and coupling analysis

Data Flow

• Request/response patterns
• Event-driven architecture
• State management strategies
• Data transformation pipelines

Integration Patterns

• API design (REST, GraphQL, RPC)
• Message queuing and async processing
• Service boundaries and communication
• Error propagation across boundaries

Scalability

• Horizontal vs vertical scaling considerations
• Caching strategies
• Database design and query optimization
• Load balancing and distribution

Decision Checkpoints

Architectural decisions require user approval when:

• Introducing new service boundaries
• Changing data flow patterns
• Adding new external dependencies
• Modifying public API contracts

When to Use

• During PLAN workflow architecture phases
• During BUILD when architectural choices arise
• When reviewing system design in REVIEW workflow

Agents Used

• planner (architecture planning)
• component-builder (architecture implementation)
• code-reviewer (architecture review)