# Logo Marquee (Notchset): prompt.md (v1.0.0)

- id: `logo-marquee` · version 1.0.0 · block · pro (Pro)
- category: Marketing
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add @notchset-pro/logo-marquee`
- npm dependencies: class-variance-authority@^0.7
- registry dependencies: utils, https://notchset.dev/r/notchset-foundation.json
- docs: https://notchset.dev/components/logo-marquee
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

Two rows of customer logos drifting in opposite directions with hard edges, pausing on hover, focus and a PAUSE button; hovering a logo inks it and fills a readout with the customer's industry, volume, start date and outcome with READ THE STORY; a click pins it, and SEE ALL CUSTOMERS unrolls the full grid.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `class-variance-authority@^0.7`.
- Files: `components/ui/notchset/blocks/logo-marquee.tsx`; shared code: `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`, `lib/beautiful-ui/notchset/button-variants.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `notchset-foundation`.
- Builds: one set of files for both, but its dependencies come in Base UI and Radix builds. 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: `LogoMarquee`, 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-glide`, `--notchset-ease-key-down`, `--notchset-ease-key-up`, `--notchset-ease-travel`, `--notchset-fade`, `--notchset-focus-color`, `--notchset-focus-inset`, `--notchset-grow-to`, `--notchset-key-down`, `--notchset-key-up`, `--notchset-life-from`, `--notchset-life-ms`, `--notchset-node-blink`, `--notchset-node-bloom`, `--notchset-node-delay`, `--notchset-plate-color`, `--notchset-rise-from`, `--notchset-rule`, `--notchset-scan-to`, `--notchset-scroll`, `--notchset-sheet-from`, `--notchset-signal`, `--notchset-sweep-to`, `--notchset-travel`). Never add Tailwind colour classes inside the component.

```tsx
import { LogoMarquee, type MarqueeLogo } from "@/components/ui/notchset/blocks/logo-marquee";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `LogoMarquee` | `logo-marquee` | Header with pause, the two rows, the readout and the full list. |

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://notchset.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/blocks/logo-marquee.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
- logo cloud, logo wall, customer logos, social proof, trusted by, marquee, case studies, Notchset
- A landing page's 'trusted by' section with something behind each name
- Leading into case studies

### Not when
- Three or four logos: show them still
- Logos you don't have permission to use

## Mistakes
- Use real logos with permission, not the generated marks
- Keep outcomes short and specific

## Usage

```tsx
import { LogoMarquee, type MarqueeLogo } from "@/components/ui/notchset/blocks/logo-marquee";

export function Customers({ logos }: { logos: MarqueeLogo[] }) {
  return <LogoMarquee eyebrow="240 TEAMS · 31 COUNTRIES" title="Teams that ship agents on Relay" logos={logos} total={240} />;
}
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `logos` | `{ id, name, industry, volume, since, outcome, mark?, type?, href? }[]` |  | mark is a 20×20 fill and stroke path (or swap the Logo for your SVGs); type picks one of four wordmark treatments. |
| `title / eyebrow / note / total` | `ReactNode / string / string / number` |  | The heading, the line above it, the footnote and SEE ALL's count. |
| `onReadStory` | `(logo) => void` |  | READ THE STORY; without it the logo's href is followed. |

Full docs: https://notchset.dev/components/logo-marquee

## 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://notchset.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| Tab then Enter | Pin a customer's readout |

## Performance

- CSS transform animation only; paused rows cost nothing.

## Responsive

- Rows keep their natural width and loop at any size; the readout wraps.

## Motion inventory

| Interaction | What moves |
|---|---|
| Rows | Drift in opposite directions (50s and 58s a loop), no edge fades |
| SEE ALL | The grid unrolls; cells fade in 30ms apart |

## Accessibility contract (preserve when editing)
- PAUSE stops the motion (WCAG 2.2.2); hover and focus also hold a row
- Duplicated logos (for the loop) are hidden from assistive technology and the tab order
- Logos are toggle buttons named with their industry; the readout is a polite live region

## Install

```bash
npx shadcn@latest add @notchset-pro/logo-marquee
```

Pro item: needs the `@notchset-pro` registry in `components.json` and `NOTCHSET_TOKEN` in `.env.local` (https://notchset.dev/account). Setup: https://notchset.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://notchset.dev/r/notchset-foundation.json.