generating-api-contracts

# Generating API Contracts ## Overview Generate OpenAPI 3.0/3.1 specifications and consumer-driven contract tests from existing API implementations, design documents, or database schemas. Produce machine-readable contracts that serve as the single source of truth for code generation, documentation, testing, and gateway configuration, with Pact integration for consumer-driven contract verification. ## Prerequisites - API implementation with route definitions and handler logic, or design requirements document - OpenAPI authoring tool: Swagger Editor, Stoplight Studio, or IDE with OpenAPI extension - Consumer-driven contract framework: Pact (polyglot), Spring Cloud Contract (Java), or Dredd (generic) - Schema validation tool: Spectral for OpenAPI linting - Version control for contract files with diff-based review process ## Instructions 1. Scan existing route handlers and controller files using Grep and Read to extract all endpoint paths, HTTP methods, request parameter names/types, and response body shapes. 2. Generate OpenAPI 3.0 specification from the extracted data, including `info` (title, version, description), `servers` (environment URLs), `paths` (operations), and `components` (reusable schemas). 3. Define request schemas with field-level constraints: `type`, `format`, `required`, `minimum/maximum`, `pattern` (regex), `enum`, and `example` values for every property. 4. Document all response status codes per endpoint with separate schemas: 200/201 for success, 400 f...