backend-patterns
OfficialNode.js, Express, Next.js API 라우트를 위한 백엔드 아키텍처 패턴, API 설계, 데이터베이스 최적화 및 서버 사이드 모범 사례.
What this skill does
When applied, it prepends a system prompt before your request is sent — no extra calls and no change to how you are billed beyond the added tokens.
---
name: backend-patterns
description: Node.js, Express, Next.js API 라우트를 위한 백엔드 아키텍처 패턴, API 설계, 데이터베이스 최적화 및 서버 사이드 모범 사례.
origin: ECC
---
# 백엔드 개발 패턴
확장 가능한 서버 사이드 애플리케이션을 위한 백엔드 아키텍처 패턴과 모범 사례.
## 활성화 시점
- REST 또는 GraphQL API 엔드포인트를 설계할 때
- Repository, Service 또는 Controller 레이어를 구현할 때
- 데이터베이스 쿼리를 최적화할 때 (N+1, 인덱싱, 커넥션 풀링)
- 캐싱을 추가할 때 (Redis, 인메모리, HTTP 캐시 헤더)
- 백그라운드 작업이나 비동기 처리를 설정할 때
- API를 위한 에러 처리 및 유효성 검사를 구조화할 때
- 미들웨어를 구축할 때 (인증, 로깅, 요청 제한)
## API 설계 패턴
### RESTful API 구조
```typescript
// PASS: Resource-based URLs
GET /api/markets # List resources
GET /api/markets/:id # Get single resource
POST /api/markets # Create resource
PUT /api/markets/:id # Replace resource
PATCH /api/markets/:id # Update resource
DELETE /api/markets/:id # Delete resource
// PASS: Query parameters for filtering, sorting, pagination
GET /api/markets?status=active&sort=volume&limit=20&offset=0
```
### Repository 패턴
```typescript
// Abstract data access logic
interface MarketRepository {
findAll(filters?: MarketFilters): Promise<Market[]>
findById(id: string): Promise<Market | null>
findByIds(ids: string[]): Promise<Market[]>
create(data: CreateMarketDto): Promise<Market>
update(id: string, data: UpdateMarketDto): Promise<Market>
delete(id: string): Promise<void>
}
class SupabaseMarketRepository implements MarketRepository {
async findAll(filters?: MarketFilters): Promise<Market[]> {
let query = supabase.from('markets').select('*')
if (filters?.status) {
query = query.eq('status', filters.status)
}
if (filters?.limit) {
query = query.limit(filters.limit)
}
const { data, error } = await query
if (error) throw new Error(error.message)
return data
}
// Other methods...
}
```
### Service 레이어 패턴
```typescript
// Business logic separated from data access
class MarketService {
constructor(private marketRepo: MarketRepoUse this skill
Add a "skill" field with the skill’s ID to your chat completion request. It is applied server-side before your prompt is sent — no extra calls.
{
"model": "gpt-4o-mini",
"skill": "imp-4ec8467f-afeb-4f72-89cc-fa74d52343d2",
"messages": [{ "role": "user", "content": "…" }]
}Install the skill, enable it in your dashboard and (optionally) limit it to specific models. It then applies automatically to every matching request — with no "skill" field to send each time.
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