# Scroll Progress

Thin fixed progress bar at the top of the viewport showing scroll position

## Surfaces

web, google-apps-script-web, mcp-apps

## Fields

| Field | Type |
|---|---|
| color | string (optional, hex, default #6366f1) |
| height | number (optional, px, default 3) |

## Example payload

```json
{
  "type": "scroll_progress"
}
```

Live page: https://a2uicatalog.ai/atoms/scroll_progress/
Full field contract: https://a2uicatalog.ai/spec.json