NodeGui is a Node.js native addon that wraps the Qt framework to enable building native, cross-platform desktop applications using JavaScript or TypeScript. The architecture consists of two layers: TypeScript wrapper classes (under `src/lib/`) that provide a developer-friendly API, and C++ N-API (node-addon-api) wrappers (under `src/cpp/`) that directly interface with Qt widgets, layouts, and core types. A custom Node.js fork called Qode merges the Qt event loop with Node's event loop, and Facebook's Yoga library provides CSS Flexbox layout integration. The project exposes over 100 Qt widgets, including buttons, dialogs, tables, trees, text editors, menus, system tray, and clipboard, along with a comprehensive set of Qt enums and signal/event handling. The build system uses CMake with reusable modules for Qt, Napi, and Qode support, and the project includes a Docusaurus documentation site with API references and development guides.