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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+---
+id: csharp-variables
+title: "C# Variables"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["int double char string bool", "C# 변수"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.85
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["csharp", "programming-language", "w3schools", "variables"]
+raw_sources: ["https://www.w3schools.com/cs/cs_variables.php"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CSharp Variables]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+C#'s five introductory types (int/double/char/string/bool) match Java's primitive-plus-String lineup almost exactly, but `string` in C# is a genuine built-in keyword-level type from the very first variable chapter — no separate library import, no `<string>` header, no `std::string` namespace qualifier — collapsing what took C an entire "no native strings" caveat and C++ a dedicated Strings section (`<string>` header, `std::string` vs C-style char arrays) into a single bullet point alongside int/double/char/bool. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`int`** — whole numbers without decimals (e.g. `123`, `-123`). [S1]
+- **`double`** — floating-point numbers with decimals (e.g. `19.99`, `-19.99`). [S1]
+- **`char`** — a single character, surrounded by SINGLE quotes (`'a'`). [S1]
+- **`string`** — text, surrounded by DOUBLE quotes (`"Hello World"`) — a first-class type from the start, not a library add-on. [S1]
+- **`bool`** — two states only: `true` or `false`. [S1]
+- **Declaration syntax** — `type variableName = value;`; can also declare without initializing, then assign later (`int myNum; myNum = 15;`). [S1]
+- **Reassignment overwrites** — assigning a new value to an existing variable replaces the old one silently (no warning). [S1]
+
+## 📖 세부 내용 (Details)
+- String declaration + print: `string name = "John"; Console.WriteLine(name);`. [S1]
+- Int declaration + print: `int myNum = 15; Console.WriteLine(myNum);`. [S1]
+- Declare-then-assign: `int myNum; myNum = 15; Console.WriteLine(myNum);`. [S1]
+- Overwrite: `int myNum = 15; myNum = 20; // myNum is now 20`. [S1]
+- All five types declared together: `int myNum = 5; double myDoubleNum = 5.99D; char myLetter = 'D'; bool myBool = true; string myText = "Hello";` — note the `D` suffix on the double literal. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **string이 처음부터 내장 타입으로 취급됨**: C는 문자열이라는 내장 타입 자체가 없어 char 배열로 흉내내야 했고, C++는 `<string>` 헤더와 `std::string`을 별도로 배워야 했지만, C#은 첫 변수 챕터부터 int/double/char/bool과 동일한 급으로 string을 나열한다는 점이 확인됨 — 별도 import나 네임스페이스 한정자 없이 바로 사용 가능. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — name(string)과 myNum(int) 변수를 선언하고 출력하는 기본 예제가 원문에서 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Declaring all five basic C# types (C#):
+```csharp
+int myNum = 5;
+double myDoubleNum = 5.99D;
+char myLetter = 'D';
+bool myBool = true;
+string myText = "Hello";
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.85
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C# Tutorial]]
+- **관련 개념:** [[CSharp Variables Identifiers]], [[CSharp Data Types]], [[CPP Strings]], [[C Strings]]
+- **참조 맥락:** Variables 섹션 — Identifiers 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C# Variables — https://www.w3schools.com/cs/cs_variables.php
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C# Variables" page (Astra wiki-curation, P-Reinforce v3.1 format).