What problem does it solve? After backend API work is finished, frontend developers often lack the business context, validation rules, and edge-case knowledge needed to build integrations without repeatedly asking backend developers questions. This Skill analyzes completed backend code and produces a complete, structured handoff document so frontend work can start immediately. ## Core Features & Use Cases - Structured Handoff Generation: Produces a markdown document covering business context, endpoints, DTOs, TypeScript interfaces, enums, validation rules, edge cases, integration guidance, and test scenarios. - Versioned Output: Saves documents to .claude/docs/ai/<feature-name>/api-handoff.md and automatically increments version suffixes (-v2, -v3) when regenerating after feedback. - Simple API Shortcut: For straightforward CRUD endpoints, skips the full template and outputs just the method, path, and example request/response JSON. - Use Case: After implementing an expense approval API, ask for a handoff document and receive a file with endpoint details, approval status enums, permission rules, optimistic UI guidance, and acceptance test scenarios ready for the frontend team. ## Quick Start Ask the assistant to create API handoff documentation for the backend feature you just completed, naming the feature and its endpoints.