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>

10_Wiki/Topics/Domain_Programming/Topic_CPP/CPP_References.md

@@ -0,0 +1,68 @@
+---
+id: cpp-references
+title: "C++ References"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["reference variable", "alias", "& operator", "C++ 참조"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.87
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["cpp", "programming-language", "w3schools", "references"]
+raw_sources: ["https://www.w3schools.com/cpp/cpp_references.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CPP References]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A reference isn't a COPY or even a pointer to a variable — it's a genuine ALIAS, meaning `food` and `meal` in `string &meal = food;` are two DIFFERENT NAMES for the exact SAME memory location, so changing `meal` changes `food` directly with no dereference operator ever needed — a concept with NO equivalent in C, where the closest thing (a pointer) always requires explicit `*` to reach the value. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Reference variable (`type &alias = original;`)** — an alias for an EXISTING variable, created with the `&` operator at declaration. [S1]
+- **Same memory location** — the reference and the original variable refer to the identical memory address, not a copy. [S1]
+- **No dereference needed** — unlike a pointer, using a reference to read or write the value requires no `*`; you just use the reference name directly. [S1]
+- **Bidirectional change propagation** — changing either the original variable OR the reference changes the other, since they're the same storage. [S1]
+
+## 📖 세부 내용 (Details)
+- Creating a reference and reading through both names: `string food = "Pizza"; string &meal = food; cout << food; // Pizza cout << meal; // Pizza`. [S1]
+- Changing through the reference affects the original: `meal = "Burger"; cout << food; // Burger cout << meal; // Burger`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **참조는 C에 없던 완전히 새로운 개념**: 포인터처럼 별도의 역참조(*) 연산 없이도 원본 변수와 완전히 동일한 메모리를 가리키는 별칭(alias)이라는 점에서, C의 포인터와도 다른 C++ 고유의 개념임이 확인됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 참조는 이후 함수 매개변수를 값 복사 없이 전달하는 실전 활용(Function Reference 챕터)의 기초가 된다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+A reference variable acting as a true alias — changing it changes the original directly (C++):
+```cpp
+string food = "Pizza";  // food variable
+string &meal = food;    // reference to food (an alias, not a copy)
+meal = "Burger"; // changes both meal and food
+cout << food; // Burger
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.87
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C++ Tutorial]]
+- **관련 개념:** [[CPP Enum]], [[CPP References Memory]], [[CPP Pointers]]
+- **참조 맥락:** 참조·포인터·메모리 섹션 첫 챕터 — 메모리 주소(References Memory) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C++ References — https://www.w3schools.com/cpp/cpp_references.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C++ References" page (Astra wiki-curation, P-Reinforce v3.1 format).