> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt.

[NEWUltraModern.js 3.0 is ready for SuperApps→](/guides/get-started/ultramodern)

# UltraModern.js 3.0The SuperApp framework for Effect, TanStack, SSR, BFF, and Micro Verticals

[UltraModern Guide](/guides/get-started/ultramodern)[Start Building](/guides/get-started/quick-start)

[Rust BundlerBuilt with Rspack bundler for faster build speed.](/guides/concept/builder)[Integrated BFFDevelop BFF code in the same project, enjoy simple function calls.](/guides/advanced-features/bff/index)[Nested RoutesFile-as-route, comes with lots performance optimizations.](/guides/basic-features/routes/routes)[Multi-Rendering ModeRSC, SSR, SSG, all out of the box for you.](/guides/basic-features/render/ssr)[CSS SolutionsCSS Modules, CSS-in-JS, Tailwind CSS, take your pick.](/guides/basic-features/css/css)[Easy to ConfigureLaunch with zero configuration, then everything is configurable.](/configure/app/usage)

Guide

- [Start Building](/guides/get-started/quick-start)
- [Core Concept](/guides/concept/entries)
- [Basic Features](/guides/basic-features/routes)
- [Advanced Features](/guides/advanced-features/bff)

API

- [Configuration](/configure/app/usage)
- [Command](/apis/app/commands)
- [Runtime](/apis/app/runtime/core/bootstrap)
- [Conventions](/apis/app/hooks/src/app)

Topic

- [Module Federation](/guides/topic-detail/module-federation/introduce)
- [Plugin System](/plugin/plugin-system)

Help

- [Changelog](https://github.com/BleedingDev/ultramodern.js/releases)
- [GitHub Issues](https://github.com/BleedingDev/ultramodern.js/issues)
- [Github Discussion](https://github.com/BleedingDev/ultramodern.js/discussions)