Add API Endpoints Automatically

The problem

Manually scaffolding new API endpoints is repetitive and error-prone. It is easy to deviate from established project conventions, miss validation logic, or forget to update the corresponding test suites.

What it does

• Detects existing backend frameworks and routing patterns automatically.
• Generates RESTful routes and controllers following project-specific naming conventions.
• Implements request validation and response handling based on existing middleware.
• Updates or creates test files to match the current testing architecture.
• Validates changes using local linting and test execution tools.

Frameworks & tools

Works with any backend stack including Node.js (Express, Fastify), Python (FastAPI, Flask), Go, and Ruby on Rails. Utilizes Read, Edit, and Bash tools for implementation and verification.

Why this beats prompting it yourself

Generic prompts often produce hallucinated patterns or ignore your project's specific directory structure. This skill enforces a "Safety > Project Convention" priority, ensuring new code integrates with your existing middleware and architecture without manual refactoring.

Use cases

• Adding a new POST endpoint to handle user registration with validation.
• Extending an existing resource controller with a new PATCH route.
• Scaffolding a health-check endpoint for a new microservice.
• Implementing CRUD operations for a newly defined database model.

Known limitations

Requires an existing project structure to detect conventions. It will not invent database models from scratch unless explicitly required for the endpoint logic.