openapi-generator

To auto-generate OpenAPI specs from code, this skill analyzes your Express or Next.js routes to produce complete OpenAPI 3.0/3.1 specifications with schemas. It outputs YAML or JSON formats suitable for API explorers.

Yes, you can generate OpenAPI documentation for Fastify, Hono, and NestJS frameworks. The skill performs automatic route discovery across these frameworks to build full OpenAPI specifications with embedded human-readable documentation.

To keep your Swagger UI documentation in sync with your API implementation, run the OpenAPI generator against your codebase after each deployment to regenerate the spec directly from your current routes.

Yes, the OpenAPI generator supports exporting schemas for Postman and Insomnia. It outputs YAML or JSON files with inferred request and response schemas that integrate directly into these client testing tools.

The best way to convert API routes into an OpenAPI 3.0 specification is to use an automated code-to-spec generator. This skill discovers your routes and performs schema inference to build complete OpenAPI specifications automatically.

OpenAPI specifications drift from your API implementation when documentation is maintained separately from code. Generating OpenAPI specs directly from your framework routes ensures the documentation accurately reflects the current implementation.