Drawer

# Aster Component Implementation Prompt — Drawer

## 1. Component Purpose & Canonical Role
- **Component:** Drawer (`drawer`)
- **Category:** Overlays & Dialogs
- **Native Element:** `<div role="dialog" aria-modal="true">`
- **Summary:** A panel that slides in from the edge and keeps the page in context.
- **When to Use:** Telemetry inspectors, log streams, and multi-field configuration panels.
- **When Not to Use:** Simple yes/no confirmations (use Dialog).

## 2. Authoritative Repository Files
- **Component CSS:** `components/drawer/drawer.css`
- **Component Spec:** `docs/components/drawer.md`
- **Agent Contract:** `skills/using-aster-components/SKILL.md`
- **Compiled Bundle:** `dist/css/aster.css` and `dist/js/aster.js`

## 3. Canonical HTML Structure & Classes
```html
<div class="as-drawer" id="side-drawer" role="dialog" aria-modal="true" aria-labelledby="drawer-title" hidden>
  <div class="as-drawer__backdrop" data-drawer-close></div>
  <div class="as-drawer__panel as-drawer__panel--right">
    <div class="as-drawer__header">
      <h3 class="as-drawer__title" id="drawer-title">Node Telemetry</h3>
      <button type="button" class="as-drawer__close" data-drawer-close aria-label="Close drawer"></button>
    </div>
    <div class="as-drawer__body">Telemetry details...</div>
  </div>
</div>
```

## 4. Measured Geometry
Measured from the rendered component when this page loads.

## 5. Non-Negotiable Aster Constraints
1. **Zero Primitive Color Leaks:** Bind colors strictly to `--as-semantic-color-*` custom properties. Never use `--as-color-primitive-*` or hardcoded hex values in component usage.
2. **Minimum 4px Radius Policy:** Never use `2px` border-radius. Use `--as-radius-sm` (`4px`), `--as-radius-md` (`8px`), `--as-radius-lg` (`12px`), or `--as-radius-full` (`9999px`).
3. **Single Standard Density Mode:** Compact mode (`data-density="compact"` / `.as-*--compact`) is permanently retired. Do not emit compact classes or attributes.
4. **WCAG 2.2 AA Accessibility:** Maintain >= 4.5:1 text contrast, >= 3:1 UI/border contrast, >= 24x24px interactive hit targets, and full keyboard operability (`Tab`, `Enter`, `Space`, `Escape`, Arrow keys).

## 6. Verification Commands
```bash
npm run test:components
npm run test:contrast
npm run test:browser
```