Iron Law: Never start implementation without an approved architecture plan; always produce API contracts and sequence diagrams before code.

Architecture Design Skill

Design system architecture, API contracts, deployment topologies, and technology decisions for full-stack applications.

Supported Design Artifacts:

• System context diagrams (C4 model, Mermaid)
• Sequence diagrams (service interactions)
• API contracts (OpenAPI 3.x)
• Deployment topologies (Docker Compose)
• Architecture Decision Records (ADRs)

Process:

1. Analyze Request
   • Identify which artifacts the user needs
   • Determine scope: single service, multi-service, full system