# Hover Card (Notchset): prompt.md (v1.0.0)

- id: `hover-card` · version 1.0.0 · component · pro (Pro)
- category: Overlays
- build: Base UI (this item also ships a Radix build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/hover-card`
- npm dependencies: @base-ui/react@^1
- registry dependencies: utils, https://beautiful-ui.dev/r/notchset-foundation.json
- docs: https://beautiful-ui.dev/components/hover-card
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

shadcn's Hover Card in Notchset: inline chips with an avatar and a handle that lift as their card opens, and a 272px card hanging from a leader and node, revealed from its edge, with a person's or an agent's role, note, three stats rising in and a status row.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `@base-ui/react@^1` (Base UI build); `radix-ui@^1` (Radix build).
- Files: `components/ui/notchset/hover-card.tsx`; shared code: `lib/beautiful-ui/notchset/hover-card.tsx`, `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `notchset-foundation`.
- Builds: separate Base UI and Radix files. Install the one that matches the project (see Install): a free item's bare URL installs the Base UI build of it and its dependencies.
- Exports to keep: `HoverCard`, `HoverCardChip`, `HoverCardContent`, `HoverCardPerson`, `HoverCardTrigger`, and every exported type.
- CSS: the install adds the notchset foundation (tokens, keyframes, motion levels) to your global stylesheet once. Nothing to import by hand.
- Re-running `add` (or `--overwrite`) re-applies those rules: put overrides in your own CSS, never in the installed rules.
- Tokens: retheme with the `--notchset-*` custom properties (`--notchset-check`, `--notchset-control-edge`, `--notchset-draw-from`, `--notchset-ease-bloom`, `--notchset-ease-travel`, `--notchset-fade`, `--notchset-focus-color`, `--notchset-focus-inset`, `--notchset-life-from`, `--notchset-life-ms`, `--notchset-node-blink`, `--notchset-node-bloom`, `--notchset-node-delay`, `--notchset-plate-color`, `--notchset-rise-from`, `--notchset-rule`, `--notchset-scroll`, `--notchset-signal`, `--notchset-sweep-to`). Never add Tailwind colour classes inside the component.

```tsx
import { HoverCard, HoverCardChip, HoverCardContent, HoverCardPerson } from "@/components/ui/notchset/hover-card";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `HoverCardChip` | `hover-card-trigger` | The inline chip. |
| `HoverCardContent` | `hover-card-content` | The card. |
| `HoverCardPerson` | `hover-card-person` | The designed body. |

Style a part with `[data-slot="<slot>"]` selectors or its `className`; keep the attributes when editing.

## Sound
- Keep every `data-slot` and `data-sound` attribute: the sound layer reads them.
- Installing this item adds no audio. Nothing plays until the app mounts `SoundProvider` once (install: `npx shadcn@latest add https://beautiful-ui.dev/r/notchset-sound.json`, import from `@/components/ui/notchset/sound-provider`); `useSound()` gives `muted` and `setMuted` for a mute control. Without a provider the audio engine never loads.

## Match the original
- Read `components/ui/notchset/hover-card.tsx` as the reference implementation before changing or recreating anything, and match it: sizes, colours per theme, motion timings, copy and behaviour.
- If you deviate (a prop you can't honour, a style you changed, a dependency you swapped), say so in your reply, part by part.
- Keep the accessibility contract, the keyboard map and the motion levels listed below.

## Use it when
- hover card, preview card, user card, mention preview, profile popover, agent card, shadcn hover card, Notchset
- Names, handles and agents mentioned in text, where a glance at who they are helps
- A drop-in for shadcn's Hover Card (same parts)

### Not when
- Anything people must act on: use a Popover or a Dialog
- Short labels for icons: use Tooltip

## Mistakes
- Keep stat labels to one word: three cells share 272px

## Usage

```tsx
import { HoverCard, HoverCardChip, HoverCardContent, HoverCardPerson } from "@/components/ui/notchset/hover-card";

<HoverCard>
  <HoverCardChip initials="MK">maya.kerr</HoverCardChip>
  <HoverCardContent>
    <HoverCardPerson person={{ name: "Maya Kerr", initials: "MK", role: "EVALS LEAD · PLANNER", stats: [["38", "REVIEWED"], ["14", "EVALS"], ["+7.5", "PTS"]], status: "ONLINE", online: true }} />
  </HoverCardContent>
</HoverCard>
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `HoverCard` | `as the primitive` |  | open, defaultOpen, onOpenChange. |
| `HoverCardTrigger delay / closeDelay` | `number` |  | 320ms to open (60ms when moving from another open card), 0 to close. Radix: openDelay / closeDelay on HoverCard. |
| `HoverCardChip` | `{ initials, agent? } + trigger props` |  | The designed trigger: an inline chip; children are the handle. |
| `HoverCardContent` | `side, sideOffset, align, collisionPadding, container` |  | Above its trigger by default (side top, 10px), kept 12px inside the viewport, flipping below when there's no room. |
| `HoverCardPerson` | `{ person: { name, initials, role, note, stats, status, online, agent } }` |  | The designed body. |

Full docs: https://beautiful-ui.dev/components/hover-card

## Customising
- Colours: the component reads your shadcn tokens (`--background`, `--foreground`, `--border` …), refined by the `--notchset-*` tokens. The signal colour is `--notchset-signal` (it falls back to `--destructive`). Set tokens on `:root`, or on any container to retheme one area.
- Dark mode follows the `.dark` class on an ancestor (the shadcn and next-themes convention).
- Update later by re-running the install with `--overwrite` (review the diff if you edited it). Changelog: https://beautiful-ui.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| Tab | Focus a chip; its card opens |

## Performance

- The card mounts only while open; the reveal is clip-path and the stats a CSS animation delay.
- All cards share one tiny store for the 60ms switch: no per-card timers.

## Responsive

- 272px, kept 12px inside the viewport, flipping below its trigger when there is no room above.

## Motion inventory

| Interaction | What moves |
|---|---|
| Open | The leader draws (120ms) and the node blooms; the card reveals from its edge (380ms after 90ms); stats rise in 60ms apart |
| Close | The card folds back to its edge in 160ms |
| Trigger | The chip lifts 2px (200ms) and takes an ink border |

## Accessibility contract (preserve when editing)
- Keyboard focus on the trigger opens the card at once; it closes when focus leaves
- The card is supplementary: put anything essential in the page too
- Stats are a description list; the status node is decorative beside its text

## Install

```bash
npx shadcn@latest add @beautiful-ui-pro/hover-card
```

Pro item: needs the `@beautiful-ui-pro` registry in `components.json` and `BEAUTIFUL_UI_TOKEN` in `.env.local` (https://beautiful-ui.dev/account). Setup: https://beautiful-ui.dev/docs/pro. Your components.json `style` picks the build: radix-*, new-york and default get Radix, base-* gets Base UI.

## Credits
- Built on shadcn/ui (https://ui.shadcn.com)

The notchset foundation (the tokens listed above, keyframes and motion levels) installs once with the first component; its CSS is public at https://beautiful-ui.dev/r/notchset-foundation.json.