reka-ui - SKILL.md Agent Skill

name: reka-ui description: Use when building with Reka UI (headless Vue components) - provides component API, accessibility patterns, composition (asChild), controlled/uncontrolled state, virtualization, and styling integration. Formerly Radix Vue. license: MIT

Reka UI

Unstyled, accessible Vue 3 component primitives. WAI-ARIA compliant. Previously Radix Vue.

Current version: v2.8.0 (January 2026)

When to Use

Building headless/unstyled components from scratch
Need WAI-ARIA compliant components
Using Nuxt UI, shadcn-vue, or other Reka-based libraries
Implementing accessible forms, dialogs, menus, popovers

For Vue patterns: use vue skill

Available Guidance

File	Topics
references/components.md	Component index by category (Form, Date, Overlay, Menu, Data, etc.)
*components/.md**	Per-component details (dialog.md, select.md, etc.)

Guides (see reka-ui.com): Styling, Animation, Composition, SSR, Namespaced, Dates, i18n, Controlled State, Inject Context, Virtualization, Migration

Loading Files

Consider loading these reference files based on your task:

references/components.md - if browsing component index by category or searching for specific components

DO NOT load all files at once. Load only what's relevant to your current task.

For styled Nuxt components built on Reka UI: use nuxt-ui skill

Key Concepts

Concept	Description
`asChild`	Render as child element instead of wrapper, merging props/behavior
Controlled/Uncontrolled	Use `v-model` for controlled, `default*` props for uncontrolled
Parts	Components split into Root, Trigger, Content, Portal, etc.
`forceMount`	Keep element in DOM for animation libraries
Virtualization	Optimize large lists (Combobox, Listbox, Tree) with virtual scrolling
Context Injection	Access component context from child components

Installation

// nuxt.config.ts (auto-imports all components)
export default defineNuxtConfig({
  modules: ['reka-ui/nuxt']
})

import { RekaResolver } from 'reka-ui/resolver'
// vite.config.ts (with auto-import resolver)
import Components from 'unplugin-vue-components/vite'

export default defineConfig({
  plugins: [
    vue(),
    Components({ resolvers: [RekaResolver()] })
  ]
})

Basic Patterns

<!-- Dialog with controlled state -->
<script setup>
import { DialogRoot, DialogTrigger, DialogPortal, DialogOverlay, DialogContent, DialogTitle, DialogDescription, DialogClose } from 'reka-ui'
const open = ref(false)
</script>

<template>
  <DialogRoot v-model:open="open">
    <DialogTrigger>Open</DialogTrigger>
    <DialogPortal>
      <DialogOverlay class="fixed inset-0 bg-black/50" />
      <DialogContent class="fixed left-1/2 top-1/2 -translate-x-1/2 -translate-y-1/2 bg-white p-6 rounded">
        <DialogTitle>Title</DialogTitle>
        <DialogDescription>Description</DialogDescription>
        <DialogClose>Close</DialogClose>
      </DialogContent>
    </DialogPortal>
  </DialogRoot>
</template>

<!-- Select with uncontrolled default -->
<SelectRoot default-value="apple">
  <SelectTrigger>
    <SelectValue placeholder="Pick fruit" />
  </SelectTrigger>
  <SelectPortal>
    <SelectContent>
      <SelectViewport>
        <SelectItem value="apple"><SelectItemText>Apple</SelectItemText></SelectItem>
        <SelectItem value="banana"><SelectItemText>Banana</SelectItemText></SelectItem>
      </SelectViewport>
    </SelectContent>
  </SelectPortal>
</SelectRoot>

<!-- asChild for custom trigger element -->
<DialogTrigger as-child>
  <button class="my-custom-button">Open</button>
</DialogTrigger>

Recent Updates (v2.6.0-v2.8.0)

New component: Rating (v2.8.0)
ScrollArea: Added "glimpse" scrollbar mode (v2.8.0)
PopperContent: Added hideShiftedArrow prop (v2.8.0)
TimeField: Added stepSnapping support (v2.8.0)
Breaking: weekStartsOn now locale-independent for date components (v2.8.0)
Virtualization: estimateSize accepts function for Listbox/Tree (v2.7.0)
Composables: useLocale, useDirection exposed (v2.6.0)
Select: disableOutsidePointerEvents prop on Content (v2.7.0)
Toast: disableSwipe prop (v2.6.0)

Resources

Reka UI Docs
GitHub
Nuxt UI (styled Reka components)
shadcn-vue (styled Reka components)

Token efficiency: ~350 tokens base, components.md index ~100 tokens, per-component ~50-150 tokens