# Capability Checks

> A bare token-driven capability checkbox group — three label-wrapped custom checks whose boxes fill with the brand two-color gradient and pop in a springy check mark when selected, announcing a live selected count — themed by the AI Steppers design system in both light and dark.

- Category: Input
- Frameworks: Vanilla, React + CSS, React + Tailwind
- Design system: Caret
- Dark mode: yes
- Access: premium (Atheros AI Pass)
- Tags: checkbox, form
- Page: https://builder.atheros.ai/components/capability-checks
- Preview: https://d17nmjscumqk5d.cloudfront.net/builder/templates/tpl_builder_capability_checks/preview-b8e947c1b397.webp

## Features

- Bare centered checkbox group with a small on-brand title group — no panel card or extra chrome
- Three custom capability checkboxes (Tool use, Vision, Code exec) built on native label-wrapped inputs
- Checked boxes fill with the brand two-color gradient via an animated `::before` layer
- Check mark draws in with a springy scale-and-rotate transition and a gentle pop of the box
- Hover paints the box border with the primary color; checked labels darken and gain weight
- Visually-hidden live region announces "N of 3 capabilities enabled" on every change
- `role="group"` with an accessible name wraps the checkbox set
- Native keyboard support — Space toggles the focused checkbox
- Dark and light themes flip the gradient (pink→blue light, violet→teal dark)
- Responsive layout that adapts down to 320px
- Fully respects `prefers-reduced-motion`

## Accessibility

- **Native semantics** — Each capability is a native `<input type="checkbox">` wrapped in its `<label>`
- **Group semantics** — `role="group"` with `aria-label="Capabilities"` on the checkbox set
- **Live readout** — Visually-hidden `role="status"` with `aria-live="polite"` announces "N of 3 capabilities enabled"
- **Keyboard support** — Space toggles the focused checkbox natively; Tab moves through toggle and checks
- **Theme toggle** — `role="switch"` with `aria-checked` toggled by JS, Enter/Space activation
- **Focus indicators** — `:focus-visible` outline drawn on the visual box when its hidden input is focused
- **Decorative icons** — Check mark SVGs carry `aria-hidden="true"`
- **Reduced motion** — `prefers-reduced-motion: reduce` disables all animations

## Keyboard shortcuts

- `Space` — Toggle the focused capability checkbox or activate the theme toggle
- `Enter` — Activate the theme toggle
- `Tab` — Move focus between the theme toggle and the checkboxes

## Common questions

**Which frameworks is Capability Checks available in?**

Capability Checks ships as Vanilla, React + CSS and React + Tailwind — HTML, CSS, JS and React source you can copy, download or clone into Atheros AI Builder.

**Is the Capability Checks input component free?**

Capability Checks is a premium component. Anyone can preview it; the source, downloads and AI customisation are included with Atheros AI Pass.

**Does Capability Checks support dark mode?**

Yes. Capability Checks ships light and dark themes, both drawn from the Caret design system's tokens. Switch the preview to dark mode to compare them.

## Get the code

Preview Capability Checks live, then sign in to copy or download the source, apply another design system, or ask the AI assistant to change it: https://builder.atheros.ai/components/capability-checks

Every component on https://builder.atheros.ai is also reachable from Claude Code, Cursor and Codex through the Atheros MCP server (paid plans). Component index: https://builder.atheros.ai/llms-components.txt