claude-code/.claude/rules/common/patterns.md

Common Patterns

Skeleton Projects

When implementing new functionality:

1. Search for battle-tested skeleton projects
2. Use parallel agents to evaluate options:
   • Security assessment
   • Extensibility analysis
   • Relevance scoring
   • Implementation planning
3. Clone best match as foundation
4. Iterate within proven structure

Design Patterns

Repository Pattern

Encapsulate data access behind a consistent interface:

• Define standard operations: findAll, findById, create, update, delete
• Concrete implementations handle storage details (database, API, file, etc.)
• Business logic depends on the abstract interface, not the storage mechanism
• Enables easy swapping of data sources and simplifies testing with mocks

API Response Format

Use a consistent envelope for all API responses:

• Include a success/status indicator
• Include the data payload (nullable on error)
• Include an error message field (nullable on success)
• Include metadata for paginated responses (total, page, limit)