# Evidence Panel (Lumen Halo): prompt.md (v1.0.0)

- id: `lumen-evidence-panel` · version 1.0.0 · component · pro (All-Access)
- category: AI interfaces
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/lumen-evidence-panel`
- npm dependencies: none
- registry dependencies: utils, @beautiful-ui/lumen-button, https://beautiful-ui.dev/r/lumen-foundation.json
- docs: https://beautiful-ui.dev/components/lumen-evidence-panel
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

What an insight rests on, so a person can check it before acting: chart references, table rows, timeline events, records and sources, each with Show, which selects, brushes or opens what it names in linked views. No evidence reads as unverified.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: none beyond React.
- Files: `components/ui/lumen/controls/evidence-panel.tsx`; shared code: `lib/beautiful-ui/core/insights.ts`, `lib/beautiful-ui/core/coordination.tsx`, `lib/beautiful-ui/core/timeline.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `lumen-button`, `lumen-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: `EvidencePanel`, and every exported type.
- CSS: the install merges this item's rules (the registry `css` field) into your global stylesheet, in `@layer components`, and adds the lumen foundation (tokens, keyframes, motion levels) 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 `--lumen-*` custom properties (`--lumen-accent`, `--lumen-accent-text`, `--lumen-bad`, `--lumen-bad-text`, `--lumen-focus`, `--lumen-good`, `--lumen-good-text`, `--lumen-hairline`, `--lumen-ink`, `--lumen-muted-ink`, `--lumen-series-1`, `--lumen-series-2`, `--lumen-series-3`, `--lumen-series-4`, `--lumen-series-5`, `--lumen-series-6`, `--lumen-warn`, `--lumen-warn-text`); this item's CSS also reads `--lumen-font-mono`, `--lumen-font-sans`, `--lumen-radius-k`. Never add Tailwind colour classes inside the component.

```tsx
import { EvidencePanel } from "@/components/ui/lumen/controls/evidence-panel";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `EvidencePanel` | — | The evidence list with Show. |

## 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 `GlassSoundProvider` once (install: `npx shadcn@latest add https://beautiful-ui.dev/r/glass-sound.json`, import from `@/components/beautiful-ui/glass-sound`); `GlassSoundToggle` is its mute control. Without a provider the audio engine never loads.

## Match the original
- Read `components/ui/lumen/controls/evidence-panel.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
- evidence, sources, citations for an AI insight, verify a recommendation, linked chart selection, Lumen
- Beside an insight or recommendation, so a person can check the claim
- Anywhere a number needs its source and freshness

### Not when
- A general link list: use Item or a table

## Mistakes
- Say when evidence is correlation, not cause, in its note
- Give sources an updatedAt so readers know how fresh the numbers are

## Usage

```tsx
import { EvidencePanel } from "@/components/ui/lumen/controls/evidence-panel";

<EvidencePanel evidence={insight.evidence} onReveal={(e) => e.kind === "record" && drawer.open(String(e.key))} />
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `evidence` | `Evidence[]` |  | chart { chart, dimension?, keys?, range? } · rows { dimension, keys } · event { at } · record { dimension, key } · source { source, updatedAt?, url? }; each has id, label and note?. |
| `onReveal` | `(evidence) => void` |  | Show was pressed. Inside a Coordination provider the selection or range is already applied; open a drawer, scroll or navigate here. |
| `title / timeZone / locale` | `ReactNode / string / string` |  | The heading, and how event times read. |
| `useRevealEvidence(onReveal)` | `hook` |  | The same Show behaviour for your own layouts. |

Full docs: https://beautiful-ui.dev/components/lumen-evidence-panel

## Customising
- Colours: set the `--lumen-*` tokens on `:root`, or on a container with the `lumen-scope` class to retheme one area. Add the `lumen-inherit` class to follow your shadcn palette instead (`--chart-N`, `--destructive`).
- 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 / Enter | Move between pieces and show one |

## Motion inventory

| Interaction | What moves |
|---|---|
| Show | The piece shown stays tinted; linked views move to it |

## Accessibility contract (preserve when editing)
- Every Show button names what it shows
- The kind of each piece is written (Chart, Rows, Event, Record, Source), not only drawn
- Source links open in a new tab with rel=noreferrer

## Install

```bash
npx shadcn@latest add @beautiful-ui-pro/lumen-evidence-panel
```

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 lumen 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/lumen-foundation.json.