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name: typescript-write description: | Write TypeScript/React code following Semicolon team standards with DDD architecture, Supabase integration, and TDD approach. Use when developing Next.js features. tools: [Read, Write, Edit, Bash]

🔔 시스템 메시지: 이 Skill이 호출되면 [SEMO] Skill: typescript-write 호출 시스템 메시지를 첫 줄에 출력하세요.

TypeScript/React Development Skill

@./../_shared/development-workflow.md @./../_shared/nextjs-commands.md @./../_shared/ddd-patterns.md

Quick Start

1. Understand First: 기존 코드/패턴 분석
2. Tests First: 실패하는 테스트 먼저 작성 (TDD)
3. Small Increments: 작고 테스트 가능한 단위로 작업
4. Quality Gates: lint/typecheck 지속 실행

When to Use

• Next.js 기능 구현
• TypeScript/React 코드 작성
• DDD 4-layer 구조 준수 필요 시
• TDD 기반 개발 진행 시

Code Writing Guidelines

DDD Layer Rules

Copy// Repository: Server-only, Supabase RPC
import { createServerSupabaseClient } from '@/lib/supabase/server';

// API Client: Factory Pattern, Singleton
export const {domain}Client = new {Domain}ApiClient();

// Hooks: React Query + API Client
import { useQuery } from '@tanstack/react-query';

// Components: Hooks only, no business logic
import { use{Domain}s } from '../_hooks';

Type Safety

Copy// ✅ CORRECT: Explicit types
function getPosts(params: GetPostsParams): Promise<PostsResponse>

// ❌ WRONG: any usage
function getPosts(params: any): Promise<any>

Error Handling

Copy// ✅ CORRECT: Consistent pattern
try {
  const data = await repository.getData();
  return { data, error: null };
} catch (error) {
  return { data: null, error: error as Error };
}

Integration Points

References

상세 가이드:

• Test Templates - 테스트 작성 템플릿
• Commit Guide - 커밋 규칙
• Quality Gates - 품질 기준