api-documentation-generator

This Skill parses your TypeScript Express source code to automatically generate OpenAPI documentation, keeping your API specs in sync with the implementation and detecting undocumented endpoints.

Yes, you can generate typed API clients and TypeScript DTOs from an OpenAPI spec in Next.js projects, producing type-safe clients directly from your validated API documentation.

Yes, this approach works with Fastify and NestJS frameworks for API validation, parsing their source code to validate endpoint coverage and ensure all routes are fully documented.

You detect drift between your API documentation and code implementation by running a validation command that reports discrepancies, ensuring your OpenAPI specs always match your actual implementation.

The best way to keep OpenAPI specs in sync across multiple repositories is to validate cross-repo contracts, detecting drift and ensuring DTOs and request/response shapes match across different codebases.