React Cosmos is designed as a sandbox for developing and testing UI components in isolation. It aims to help users prototype quickly, debug easily, and maintain quality at scale, while also helping maintain organization through a well-designed component library.

Features:

1. Fixtures: This feature utilizes a file-system based module convention for effortlessly defining component states.

2. User Interface: This functions as a playground designed for browsing fixtures and manipulating components. (The UI is also listed under Usage guides).

3. Static Export: This allows for the deployment of an interactive component library to any static hosting service.

4. Integration: React Cosmos supports integration with several systems, including Vite, Webpack, React Native, and Next.js, in addition to supporting custom setups. (These specific integrations are also listed in the Guides section).

5. Plugins: The tool offers a full-stack plugin system that enables users to extend every aspect of React Cosmos. (Plugins are also detailed in the Usage section).

6. High Quality: The tool is characterized as 100% TypeScript, having minimal dependencies ("minimal deps"), and being meticulously designed and tested.