This is the Swift OpenAPI Generator, a build-time source generation tool that produces idiomatic Swift client and server code from OpenAPI 3.0/3.1 (preliminary 3.2) documents. The architecture follows a layered pipeline: parsing (using OpenAPIKit + Yams), translation (discovering types, content, operations, and generating a structured Swift AST), and rendering (converting the AST to text). It supports multiple output modes (types-only, client, server) and integrates as a SwiftPM build plugin, command plugin, or standalone CLI. Generated code depends on the companion `OpenAPIRuntime` library and can be paired with transports like URLSession, AsyncHTTPClient, Vapor, Hummingbird, and AWS Lambda. The project includes an extensive suite of reference tests, consumer tests, compatibility tests against real-world APIs, and numerous runnable examples demonstrating middleware, streaming, multipart, and custom configurations. The core library (`_OpenAPIGeneratorCore`) is explicitly internal and not API-stable, but exhibits high engineering quality with clean abstractions, a generic pipeline stage pattern, and reusable utilities for diagnostics, recursion detection, and code rendering. Repo maintenance is active with regular commits, issue triage, and formal design proposals (SOAR-0001–0015).