Build dashboards fast with a code-first design system.
Fragment UI is a code-first design system for modern React applications. It's built on React, TypeScript, shadcn/ui and Tailwind CSS, and gives you a consistent set of components, design tokens, and ready-made blocks you can drop into real products.
You can use it like a regular component library – import a button, build a form, ship a dashboard – but under the hood it's structured so that both your team and AI tools can understand it, extend it, and keep it consistent over time.
Fragment UI is built around a few simple ideas:
Fragment UI doesn't hide anything behind a magical theme layer or opaque runtime. Components are just plain React + TypeScript files in your repository. Styles are expressed with Tailwind and design tokens. Everything lives in your own version control, next to the rest of your app.
In practice this means a few things:
If you've ever tried to change the behavior of a library component and ended up with wrappers, overrides, and brittle workarounds – this is intentionally the opposite. You own the code; Fragment UI gives you a strong, consistent starting point.
Underneath the components and blocks sits a comprehensive design token system. Colors, spacing, typography, density, motion and even i18n/RTL helpers are all expressed as tokens.
Those tokens exist in a few forms at once:
This shared language has two big effects:
If a model is going to touch your UI, it will always touch tokens. Making those tokens intentional and well-documented is one of the highest-leverage places to invest.
Buttons and inputs are essential, but teams ship value through screens: dashboards, settings pages, onboarding flows, navigation shells, and so on.
Fragment UI includes both:
The idea is simple: rather than starting from a blank page every time, you can begin from a sensible dashboard layout, settings page or shell, and adapt it to your product. AI tools can also use these blocks as reference patterns when generating new variants, which leads to more coherent results than building everything from atoms each time.
Over time, your own product screens can be promoted into blocks as well, so the design system grows with your actual use cases, not just with theoretical components.
Today, a lot of teams want AI tools (Cursor, Copilot, custom agents, internal generators) to help them build UI. The problem is that most codebases are not designed to be readable for models. Names are inconsistent, tokens are primitive-only, and patterns vary from file to file.
Fragment UI is structured so that AI doesn't have to guess.
Components follow predictable patterns and naming. Design tokens carry intent (for example color-status-error-bg instead of just red-6). Layouts and screens can be described with a UI-DSL – a structured representation that's easier for a model to generate and validate than free-form JSX.
That lets AI do things like:
Instead of "AI hallucinating Tailwind", you get AI composing UI from a system that was designed to be read, understood, and extended.
Fragment UI is meant to work well even if you never touch AI – but it's built so that when you do, your system is ready for it.