# Backend Design: ECR-039 FunnelDefinition

| ID | BD-2026-039 |
| Status | Approved |
| Coding | Loop authorized |
| Level | L2 |
| Migration | YES 000040 |

## Backend Change Boundary

```text
Domain: FunnelDefinition (read)
App: AdminHandler → admin.Service → AdminRepo
API: GET /admin/analytics/funnel-definitions; GET /admin/analytics/funnel-definitions/{id}
Permission: admin.analytics.read
Migration: 000040
```

## Out of boundary

漏斗写配置 · UGC · 真支付

Rollback: down migration + remove routes/UI