riotpiao.com/tasks/3.7-live-sync-animation.md

# 3.7 — Live sync animation (mock, GREEN)

Phase: 3 — Delivery Tree (Surface E)
Stage: GREEN

Depends on: [2.5](2.5-api-stream.md), [3.6](3.6-frontend-wave-columns.md)

- [ ] Live sync animation `OutOfSync -> Syncing -> Synced` driven by [/api/stream](../app/api/stream/route.ts) `delivery` event type (add this event type alongside the existing `topology` one)

Mock only: `/api/stream` emits synthetic deltas, not a real Argo Application watch. See [REQUIREMENTS.md](REQUIREMENTS.md).

## Verify

```bash
curl -N http://localhost:3000/api/stream   # observe delivery events once event type is added
```