Sequelize UI is a browser-based code generation tool that allows users to visually design database schemas and generate a complete Node.js/TypeScript project using the Sequelize ORM. The application is built as a Next.js static export (client-side only) with React and Tailwind CSS, storing schemas and user preferences in localStorage. It provides a rich UI for defining models, fields, and associations, and then generates a full project scaffold including model classes, migrations, configuration files, and a minimal server. The codebase is well-structured with a clear separation between core domain logic (schema types, file tree, code generation utilities), a pluggable framework interface for code generation, and a comprehensive set of UI components. It includes extensive unit tests and end-to-end migration tests against real databases. While primarily an application, it also contains example schemas and snapshot-based test fixtures that serve as data for verifying code generation correctness.