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_Java/Java_Packages.md

@@ -0,0 +1,77 @@
+---
+id: java-packages
+title: "Java Packages"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["import keyword", "자바 패키지"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "oop", "packages", "import"]
+raw_sources: ["https://www.w3schools.com/java/java_packages.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Packages]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Building your own package requires a two-step compile that most beginners miss — first `javac MyPackageClass.java`, then `javac -d . MyPackageClass.java` (the `-d` flag actually creates the package's folder structure); skipping the second step means the package folder never materializes. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Package** — groups related classes, like a folder; avoids name conflicts, improves maintainability. [S1]
+- **Built-in packages** — the Java API, a library of prewritten classes (e.g. `java.util`). [S1]
+- **User-defined packages** — created via the `package` keyword, mapped to actual filesystem directories. [S1]
+- **`import`** — `import package.name.Class;` for a single class, `import package.name.*;` for the whole package. [S1]
+- **`-d` compiler flag** — specifies the destination folder, forcing the compiler to create the package directory structure. [S1]
+- **Lowercase package naming convention** — avoids conflicts with class names (which start uppercase). [S1]
+
+## 📖 세부 내용 (Details)
+- Import a single class: `import java.util.Scanner; ... Scanner myObj = new Scanner(System.in); String userName = myObj.nextLine();`. [S1]
+- Import whole package: `import java.util.*;`. [S1]
+- User-defined package: `package mypack; class MyPackageClass { public static void main(String[] args) { System.out.println("This is my package!"); } }`. [S1]
+- Compile + run: `javac MyPackageClass.java` then `javac -d . MyPackageClass.java`, then run via `java mypack.MyPackageClass`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — Scanner 클래스를 이용한 사용자 입력 처리가 java.util 패키지 활용의 대표 실전 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Using Scanner from java.util for user input (Java):
+```java
+import java.util.Scanner;
+class Main {
+    public static void main(String[] args) {
+        Scanner myObj = new Scanner(System.in);
+        System.out.println("Enter username");
+        String userName = myObj.nextLine();
+        System.out.println("Username is: " + userName);
+    }
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Encapsulation]], [[Java Inheritance]], [[Java User Input]]
+- **참조 맥락:** 클래스 그룹화 및 import 문법 — 사용자 입력(Scanner)/상속 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Packages & API — https://www.w3schools.com/java/java_packages.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Packages & API" page (Astra wiki-curation, P-Reinforce v3.1 format).