# Backend Design: ECR-014 MembershipPlan

| ID | BD-2026-014 |
| ECR | ECR-014 |
| Status | Approved |
| Coding | Authorized（Loop） |
| Change Level | L2 |
| Risk | Low |

## Change Boundary

```text
Domain: MembershipPlan
App: admin + membership CreateOrder amount/days
Infra: migration + repo
API: /admin/membership-plans*
Migration: YES
Tests: integration
```

## Rollback

down migration；回退硬编码 planDays/amount