OpenAPI Documentation Generator

## Overview This crystal reads your backend routing code — supporting Express, FastAPI, and Gin — and automatically extracts routes, path parameters, query parameters, request bodies, and response schemas to produce a standards-compliant OpenAPI 3.1 YAML file. ## Features - Automatic request/response schema inference, including nested object types - Realistic example value generation for every parameter and response field - Logical grouping of endpoints by resource using OpenAPI tags - Optional Swagger UI HTML output for one-command interactive API documentation hosting