---

name: doc-sync description: Sync .claude/ documentation with code changes. Use when models/migrations/routes change, after completing features, or user says "update docs", "sync documentation", "docs out of date", "update DATABASE.md/API.md/TASKS.md".

Documentation Sync

Keep .claude/ docs current with code changes.

Quick Start

CopyTask Progress (copy and check off):
- [ ] 1. Detect changes (git diff or user input)
- [ ] 2. Determine which docs to update
- [ ] 3. Read current schema/routes/code
- [ ] 4. Generate updated content
- [ ] 5. Update documentation files
- [ ] 6. Validate consistency

Target Documents

Auto-Detection

Map file changes to docs:

Copydb/migrate/*.rb → DATABASE.md
db/schema.rb → DATABASE.md
app/models/*.rb → DATABASE.md, API.md
app/controllers/*.rb → API.md
config/routes.rb → API.md
Gemfile → ARCHITECTURE.md

DATABASE.md Updates

Generate ERD

Copy┌─────────────────────┐
│       users         │
├─────────────────────┤
│ id (PK)             │
│ email (unique)      │
│ name                │
└─────────────────────┘
          │ 1
          │ has_many
          ▼ N
┌─────────────────────┐
│       posts         │
├─────────────────────┤
│ id (PK)             │
│ user_id (FK)        │
│ title               │
└─────────────────────┘

Table Schema

Read db/schema.rb and generate:

Copy## users 테이블

| 컬럼명 | 타입 | Null | Default | 설명 |
|--------|------|------|---------|------|
| id | bigint | NO | AUTO | Primary Key |
| email | string | NO | - | 이메일 (unique) |
| name | string | NO | - | 사용자 이름 |

**인덱스**:
- UNIQUE INDEX index_users_on_email (email)

**연관관계**:
- has_many :posts
- has_many :comments

API.md Updates

Routes Table

Copyrails routes --expanded

Parse into markdown:

Copy| HTTP | Path | Controller#Action | 설명 |
|------|------|-------------------|------|
| GET | / | posts#index | 커뮤니티 홈 |
| GET | /posts/:id | posts#show | 게시글 상세 |
| POST | /posts | posts#create | 게시글 생성 |

Controller Actions

Document each action:

Copy### PostsController#index

**경로**: `GET /posts`
**인증**: 불필요
**N+1 방지**: `includes(:user)`

TASKS.md Updates

Calculate Progress

Copytotal = 20
completed = 8
progress = (8.0 / 20 * 100).round  # => 40%

Update:

Copy## 📊 전체 진행률

- 1주차: ✅✅✅✅✅ 100% (5/5)
- 2주차: ✅✅✅⬜⬜ 60% (3/5)

**전체**: 40% (8/20)

Mark Complete

Check git commits:

Copygit log --grep="notification"

Update checkboxes:

Copy- [x] User 모델 구현 ← 완료
- [x] 알림 시스템 ← 완료
- [ ] 이메일 인증 ← 진행 중

Validation

Compare code vs docs:

Copy⚠️ 문서 불일치:

DATABASE.md:
  - Notification 모델이 코드에만 존재 (문서에 없음)

API.md:
  - /notifications routes가 문서에 없음

수정:
  - DATABASE.md에 Notification 추가
  - API.md에 notifications routes 추가

Automation Scripts

• Database sync: sync_database_docs.rb - Auto-generates DATABASE.md from schema
• API sync: sync_api_docs.sh - Auto-generates API.md from routes

Copy# Run database sync
ruby .claude/skills/doc-sync/scripts/sync_database_docs.rb

# Run API sync
bash .claude/skills/doc-sync/scripts/sync_api_docs.sh

Commands Reference

Copycat db/schema.rb           # Read schema
rails routes --expanded    # Get routes
ls app/models/*.rb         # List models
git diff HEAD~5            # Recent changes

Examples

New model added:

CopyUser: "I added Notification model, update docs"

Actions:
1. Read db/schema.rb for notifications table
2. Update DATABASE.md with ERD and schema
3. Run rails routes
4. Update API.md with notification routes
5. Mark task complete in TASKS.md

Routes changed:

CopyModified: config/routes.rb

Actions:
1. Run rails routes
2. Update API.md routes table

Checklist

• DATABASE.md has all current tables
• ERD shows relationships
• API.md has all routes
• TASKS.md progress updated
• No broken references
• Manual content preserved