`@implementjs/ui`

The styled layer over @implementjs/primitives: the primitives own the behavior, these own the look. shadcn's design language, expressed in Tailwind classes over a small set of CSS variables.

They are not a dependency. Each component is one TypeScript file that jsrepo copies into your project, and from that moment the file is yours.

npx jsrepo add @implementjs/ui/button

Imports are followed, so select brings dropdown-menu with it, and cn — the one thing every component shares — arrives with the first component that needs it.

What you need first

An implement app with Tailwind CSS v4, and the two packages the components expect to already be there:

npm install @implementjs/core @implementjs/primitives

Those two are the only thing jsrepo add will not install for you. Everything else a component reaches for — tailwind-merge, tailwind-variants, @implementjs/lucide — comes down with it.

The components never name a color directly: every class goes through a token, so the stylesheet that defines them has to be in place before anything renders correctly. implementjs.dev/ui has it to paste, and create-implement-app --ui writes it for you along with everything else on this page.

The components

Every one of them has a page with an editable live demo, its full source, and the packages it pulls in: implementjs.dev/ui.

This is also the README of the docs app the registry is built from — those pages render the same files the registry ships. The rest of it is in the repository.