refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: wiki-2026-0508-extreme-programming-xp
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title: Extreme Programming (XP)
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category: 10_Wiki/Topics
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status: verified
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canonical_id: self
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aliases: [XP, Beck XP, pair programming, TDD, continuous integration, refactoring]
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duplicate_of: none
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source_trust_level: A
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confidence_score: 0.96
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verification_status: applied
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tags: [agile, xp, tdd, pair-programming, ci, software-engineering, beck]
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raw_sources: []
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last_reinforced: 2026-05-10
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github_commit: pending
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tech_stack:
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language: Universal
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applicable_to: [Agile, Software Process]
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---
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# Extreme Programming (XP)
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## 매 한 줄
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> **"매 best practice 의 의 의 의 extreme 의 turn"**. Kent Beck 1999. 매 TDD, 매 pair, 매 CI, 매 refactoring, 매 simple design. 매 modern: 매 XP 의 practices 의 mainstream — 매 XP 의 brand 의 fade, 매 spirit 의 retain (DevOps, trunk-based, AI-paired).
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## 매 핵심
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### 매 12 practices
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1. **Planning game** (story points).
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2. **Small releases**.
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3. **Metaphor**.
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4. **Simple design** (YAGNI).
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5. **Testing** (TDD).
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6. **Refactoring**.
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7. **Pair programming**.
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8. **Collective ownership**.
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9. **Continuous integration**.
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10. **40-hour week**.
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11. **On-site customer**.
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12. **Coding standards**.
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### 매 5 values
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- Communication, Simplicity, Feedback, Courage, Respect.
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### 매 modern legacy
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- **Trunk-based development**.
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- **CI/CD**.
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- **TDD** (still controversial).
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- **AI-paired** (Copilot, Cursor) = modern pair.
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- **Mob programming**.
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## 💻 패턴
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### TDD cycle (Red-Green-Refactor)
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```python
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# 매 1. Red — failing test
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def test_email_validate():
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assert validate_email('a@b.com') is True
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assert validate_email('invalid') is False
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# 매 2. Green — minimum
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def validate_email(email):
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return '@' in email
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# 매 3. Refactor — pattern
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import re
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def validate_email(email):
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return bool(re.match(r'^[^\s@]+@[^\s@]+\.[^\s@]+$', email))
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```
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### Pair programming roles
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```yaml
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driver:
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- types code
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- tactical focus
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- explains as goes
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navigator:
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- reviews + thinks ahead
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- strategic
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- catches bugs / typos
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rotation: every 25 minutes
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```
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### Mob programming
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```yaml
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mob:
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size: 3-5 people
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driver_rotation: 5-10 min
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laptop: single
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goal: continuous learning + team alignment
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```
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### CI pipeline
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```yaml
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on: { push: { branches: [main] } }
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jobs:
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test:
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steps:
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- uses: actions/checkout@v4
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- run: npm ci
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- run: npm test
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- run: npm run lint
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```
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### Story (planning game)
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```markdown
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## Story: User can reset password
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### As a user
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I want to reset my password
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So that I can regain access
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### Acceptance criteria
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- [ ] Email field validates format
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- [ ] Confirmation email sent
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- [ ] Token expires after 1 hour
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- [ ] Old password invalidated
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### Estimate: 3 points
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```
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### Refactor — Extract Method
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```typescript
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// 매 before
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function processOrder(order) {
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// 매 20 lines mixing validation + calculation + persist
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}
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// 매 after
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function processOrder(order) {
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validate(order);
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const total = calculateTotal(order);
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persist({ ...order, total });
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}
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```
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### Simple design (YAGNI)
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```typescript
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// 매 ❌ premature abstraction
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class GenericRepository<T, K, ...> { ... }
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// 매 ✅ simple
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class UserRepository {
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async find(id: string): Promise<User | null> { ... }
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async save(u: User): Promise<void> { ... }
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}
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// 매 abstract 매 매 3rd similar repo
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```
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### Continuous integration (trunk-based)
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```bash
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# 매 short-lived branch (< 1 day)
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git checkout -b feat/quick-fix
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# 매 work
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npm test
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git add -p; git commit
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git push
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# 매 PR → review → merge → CI deploy
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```
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### TDD with AI pair
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```python
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# 매 modern XP: AI as pair
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# 매 driver: human writes test
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def test_calculate_discount():
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assert discount(100, 'STUDENT') == 10
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assert discount(100, 'NONE') == 0
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# 매 navigator (AI): suggests implementation
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def discount(amount, code):
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rules = {'STUDENT': 0.1, 'SENIOR': 0.15}
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return amount * rules.get(code, 0)
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```
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### On-site customer (modern proxy)
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```yaml
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modern_equivalent:
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- product_owner: dedicated PM
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- user_research_loop: weekly
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- support_rotation: engineers in support 1d/sprint
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- real_user_feedback: in-app survey + hotjar
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```
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### Test coverage gate
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```yaml
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# 매 fail PR if coverage drops
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- run: npm run coverage
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- run: |
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pct=$(jq '.total.lines.pct' coverage/coverage-summary.json)
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if (( $(echo "$pct < 80" | bc -l) )); then exit 1; fi
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```
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### Refactoring catalog (Fowler)
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```typescript
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// 매 Inline Variable
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// before
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const result = calculate(); return result;
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// after
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return calculate();
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// 매 Replace Magic Number
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const TAX_RATE = 0.08;
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return total * (1 + TAX_RATE);
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```
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## 매 결정 기준
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| 상황 | Practice |
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|---|---|
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| Greenfield | All-in XP |
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| Legacy + tests | TDD selectively |
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| Solo dev | TDD + CI |
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| Distributed team | CI + async pair |
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| Scale-up | Trunk + feature flags |
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| AI-augmented | Copilot + TDD |
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**기본값**: 매 modern XP = TDD + CI/CD + trunk-based + pair (or AI-pair) + simple design + small release.
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## 🔗 Graph
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- 부모: [[Agile]]
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- 변형: [[Scrum]] · [[Kanban]] · [[Mob-Programming]]
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- 응용: [[TDD]] · [[CI CD]] · [[Pair-Programming]] · [[Refactoring_Best_Practices|Refactoring]]
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- Adjacent: [[Trunk-Based-Development]] · [[Development Communication Standards]] · [[Enterprise-Software-Engineering]]
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## 🤖 LLM 활용
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**언제**: 매 small team. 매 high-quality requirement. 매 evolving requirement.
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**언제 X**: 매 strict regulatory waterfall.
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## ❌ 안티패턴
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- **Cherry-pick practices**: 매 synergy lose.
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- **TDD without refactor**: 매 cruft.
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- **Pair as overhead**: 매 communication 의 ignore.
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- **No on-site customer**: 매 wrong product.
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- **CI without tests**: 매 false safety.
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## 🧪 검증 / 중복
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- Verified (Beck XP Explained 1999/2004).
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- 신뢰도 A.
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## 🕓 Changelog
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| 날짜 | 변경 |
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|---|---|
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| 2026-04-26 | XP auto |
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| 2026-05-08 | Phase 1 |
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| 2026-05-10 | Manual cleanup — 12 practices + 매 TDD / pair / mob / CI / refactor code |
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