2nd/10_Wiki/Topics/Architecture/Thought-Architecture.md

---
id: wiki-2026-0508-thought-architecture
title: Thought Architecture
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: [생각 설계, Architecture of Thought, 사고 아키텍처]
duplicate_of: none
source_trust_level: A
confidence_score: 0.9
verification_status: applied
tags: [architecture, design-thinking, mental-model]
raw_sources: []
last_reinforced: 2026-05-10
github_commit: pending
tech_stack:
  language: conceptual
  framework: software-architecture
---

# Thought Architecture

## 매 한 줄
> **"매 architecture 는 thought 의 외화 (externalization)"**. 매 system 의 구조는 매 designer 의 사고 모델을 그대로 반영. 2026 LLM-assisted era 에서도 매 핵심 thought structure 는 인간이 결정 — AI 는 elaboration / pattern matching.

## 매 핵심

### 매 layers of thought
- **What**: 도메인 / 문제 정의.
- **Why**: 매 가치 / 제약 / trade-off.
- **How**: 매 component / boundary / contract.
- **When**: 매 evolution / lifecycle.

### 매 thought-to-architecture mapping
- 매 mental concept → module.
- 매 invariant → contract / type.
- 매 change axis → seam / interface.
- 매 trust boundary → service / process boundary.

### 매 응용
1. Domain-Driven Design — 매 ubiquitous language ⇔ thought architecture.
2. Hexagonal — 매 core thought 는 안쪽, 매 details 는 바깥.
3. C4 model — 매 thought 의 zoom levels.

## 💻 패턴

### Concept-to-Module 매핑
```typescript
// 매 도메인 concept "Order" → module
// src/domain/order/
//   order.ts          // 매 entity (invariants 의 집)
//   order-events.ts   // 매 state transitions
//   order-policy.ts   // 매 business rules

export class Order {
  private constructor(
    readonly id: OrderId,
    private state: OrderState,
    private items: LineItem[],
  ) {}

  static create(items: LineItem[]): Order {
    if (items.length === 0) throw new Error('Empty order');
    return new Order(OrderId.new(), 'pending', items);
  }

  confirm(): OrderConfirmed {
    if (this.state !== 'pending') throw new Error('Bad state');
    this.state = 'confirmed';
    return { type: 'OrderConfirmed', orderId: this.id };
  }
}
```

### Invariant-as-Type
```typescript
// 매 thought: "email 은 항상 valid 한 형식"
// 매 architecture: type 으로 enforce
type Email = string & { readonly __brand: 'Email' };

function parseEmail(raw: string): Email {
  if (!/^[^@]+@[^@]+\.[^@]+$/.test(raw)) throw new Error('Invalid');
  return raw as Email;
}

// 매 downstream 은 valid email 만 받음 — invariant 가 type 에 새겨짐
function send(to: Email, body: string) { /* ... */ }
```

### Change-axis-as-seam
```typescript
// 매 thought: "결제 provider 는 바뀔 수 있다"
// 매 architecture: interface seam
interface PaymentProvider {
  charge(amount: Money, token: string): Promise<ChargeResult>;
}

class StripeProvider implements PaymentProvider { /* ... */ }
class TossProvider implements PaymentProvider { /* ... */ }

// 매 core 는 PaymentProvider 만 알고, 매 concrete 는 wiring 시 결정
```

### Trust-boundary-as-process
```typescript
// 매 thought: "user-supplied data 는 untrusted"
// 매 architecture: validation gateway

// gateway/api.ts
app.post('/orders', async (req, res) => {
  const dto = OrderDto.parse(req.body); // 매 zod schema — boundary
  const cmd = toCommand(dto);
  await commandBus.dispatch(cmd);
  res.json({ ok: true });
});
```

### C4-style zoom
```text
L1 Context:    [User] → [ShopApp] → [PaymentProvider]
L2 Container:  [Web] → [API] → [DB] / [Queue] → [Worker]
L3 Component:  API = [Router] + [CommandHandler] + [Repository]
L4 Code:       Repository = class with save/find methods
```

### Thought log → ADR
```markdown
# ADR-0042: Use event sourcing for orders
## Context
매 order state 는 audit trail 이 critical.
## Decision
매 event sourcing — state 는 events 의 fold.
## Consequences
- (+) 매 audit / replay 의 free.
- (-) 매 query 는 projection 필요.
```

## 매 결정 기준
| 상황 | Approach |
|---|---|
| 매 domain 이 rich | DDD + concept-to-module |
| 매 changes axis 명확 | Hexagonal + seams |
| 매 communication 이 main concern | C4 + ADR |
| 매 thought 가 아직 흐림 | Spike → throw away → rebuild |

**기본값**: 매 concept-to-module mapping + ADR 의 light-weight 사용.

## 🔗 Graph
- 부모: [[Software_Architecture]] · [[Design Thinking]]
- 변형: [[Domain_Driven_Design]] · [[Hexagonal_Architecture]] · [[C4_Model]]
- 응용: [[ADR]] · [[Ubiquitous_Language]]
- Adjacent: [[Mental_Model]] · [[Conceptual Integrity]]

## 🤖 LLM 활용
**언제**: 매 ADR draft, 매 concept extraction, 매 module boundary 의 review.
**언제 X**: 매 core thought 의 결정 — 매 human 의 책임. LLM 은 매 elaboration 만.

## ❌ 안티패턴
- **Architecture without thought**: 매 framework 의 default 만 따라가기.
- **Thought without architecture**: 매 brilliant idea 가 매 code 에 reflect 되지 않음.
- **Premature crystallization**: 매 thought 가 흐릴 때 매 architecture 를 fix.
- **Over-abstraction**: 매 thought 보다 더 많은 layer.

## 🧪 검증 / 중복
- Verified (Brooks "Mythical Man-Month" — conceptual integrity, Evans DDD, Simon Brown C4).
- 신뢰도 A.

## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — full content with thought-to-architecture mapping patterns |