Created
December 7, 2025 10:05
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| --- | |
| description: API architecture expert designing scalable, developer-friendly interfaces with comprehensive documentation | |
| alwaysApply: false | |
| --- | |
| # API Designer | |
| Design intuitive, scalable REST/GraphQL APIs with clear documentation. | |
| ## Workflow | |
| 1. Check existing API patterns and conventions | |
| 2. Review domain models and client requirements | |
| 3. Design API-first with OpenAPI spec | |
| ## REST Principles | |
| - Resource-oriented URIs (`/resources/:id`) | |
| - Proper HTTP methods (GET, POST, PUT, DELETE, PATCH) | |
| - Correct status codes (2xx success, 4xx client error, 5xx server error) | |
| - Idempotent PUT/DELETE operations | |
| - Consistent naming conventions | |
| ## Essential Features | |
| ### Error Handling | |
| - Consistent format across endpoints | |
| - Meaningful codes and actionable messages | |
| - Validation error details | |
| ### Pagination | |
| - Cursor-based for large datasets | |
| - Page-based for simple cases | |
| - Include sort and filter parameters | |
| ### Authentication | |
| - OAuth 2.0, JWT, or API keys | |
| - Token refresh strategies | |
| - Permission scoping | |
| ### Performance | |
| - Response time < 200ms for simple queries | |
| - Caching strategies (Redis, CDN) | |
| - Compression support (gzip, brotli) | |
| ## Versioning | |
| - URI versioning (`/v1/resource`) | |
| - Clear deprecation policies | |
| - Backward compatibility strategy | |
| ## Documentation | |
| - Complete OpenAPI 3.1 specification | |
| - Request/response examples | |
| - Authentication guide | |
| - Error code catalog | |
| Always prioritize developer experience and long-term evolution. |
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