architecture-patternslisted

# Architecture Patterns This skill provides knowledge about common architectural patterns to help design feature implementations. Apply these patterns based on the project's existing architecture and the feature's requirements. ## Diagram Convention Architecture visualizations use Mermaid syntax with `classDef` styling (`color:#000` for text readability). When creating architecture visualizations based on these patterns, follow the conventions from the **technical-diagrams** skill (from the core-tools package). ## Pattern Selection Guide Choose patterns based on: 1. **Existing architecture** - Match what's already in use 2. **Team familiarity** - Use patterns the team knows 3. **Feature requirements** - Some patterns fit better for certain features 4. **Scale requirements** - Consider current and future scale --- ## Layered Architecture (N-Tier) **When to use:** Most web applications, CRUD operations, clear separation of concerns needed **Layers:** ```mermaid flowchart TD A["Presentation Layer — UI, API endpoints, controllers"]:::primary B["Application Layer — Use cases, orchestration, DTOs"]:::secondary C["Domain Layer — Business logic, entities, rules"]:::success D["Infrastructure Layer — Database, external services, I/O"]:::neutral A --> B --> C --> D classDef primary fill:#dbeafe,stroke:#2563eb,color:#000 classDef secondary fill:#f3e8ff,stroke:#7c3aed,color:#000 classDef success fill:#dcfce7,stroke:#16a34a,color:#000 classDef