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: javascript-syntax
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title: "JavaScript Syntax"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["JS syntax", "literals", "identifiers", "case sensitivity", "camelCase"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["javascript", "js", "web", "frontend", "w3schools", "syntax", "identifiers"]
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raw_sources: ["https://www.w3schools.com/js/js_syntax.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[JavaScript Syntax]]
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## 🎯 한 줄 통찰 (One-line insight)
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JavaScript syntax is the set of rules for how programs are constructed — built from values (literals and variables), keywords, operators, expressions, and identifiers, all of which are case-sensitive. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Syntax = construction rules** — JavaScript syntax is the set of rules for how JavaScript programs are constructed. [S1]
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- **Two kinds of values** — fixed values (literals) and variable values (variables). [S1]
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- **Literals** — numbers are written with or without decimals; strings are text written within double or single quotes. [S1]
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- **Keywords create variables** — the `let` and `const` keywords are used to create variables; keywords are case-sensitive. [S1]
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- **Variables store data** — variables are containers for storing data values and must have unique names. [S1]
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- **JavaScript is case-sensitive** — `lastName` and `lastname` are two different variables. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Declare → assign → compute** — declare variables with `let`/`const`, assign values, then combine them in expressions. [S1]
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- **Lower camelCase naming** — hyphens are not allowed; underscores and PascalCase are possible, but JavaScript programmers tend to use lower camelCase. [S1]
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- **Identifier rules** — start with a letter, `_`, or `$`; later characters may include digits; never a reserved keyword; case-sensitive. [S1]
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## 📖 세부 내용 (Details)
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**JavaScript Syntax** — JavaScript syntax is the rules for how JavaScript programs are constructed. A basic program declares variables, computes values, and may contain comments: [S1]
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```javascript
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// How to Declare variables:
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let x = 5;
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let y = 6;
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// How to Compute values:
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let z = x + y;
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// I am a Comment. I do Nothing
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```
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**JavaScript Values** — The JavaScript syntax defines two types of values: fixed values (literals) and variable values (variables). [S1]
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**JavaScript Literals** — Numbers are written with or without decimals: [S1]
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```javascript
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10.50
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1001
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```
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Strings are text, written within double or single quotes: [S1]
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```javascript
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"John Doe"
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'John Doe'
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```
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**JavaScript Keywords** — JavaScript keywords are used to identify actions to be performed. The `let` and `const` keywords tell the browser to create variables: [S1]
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```javascript
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let x = 5;
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const fname = "John";
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```
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**JavaScript Variables** — In a programming language, variables are used to store data values. JavaScript uses the keywords `var`, `let`, and `const` to declare variables. An equal sign (`=`) is used to assign values to variables: [S1]
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```javascript
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// Define x as a variable
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let x;
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// Assign the value 6 to x
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x = 6;
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```
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**JavaScript Operators** — JavaScript uses arithmetic operators (`+`, `-`, `*`, `/`) to compute values, and an assignment operator (`=`) to assign values to variables: [S1]
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```javascript
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let x = 5;
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let y = 6;
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let sum = x + y;
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```
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**JavaScript Expressions** — An expression is a combination of values, variables, and operators which computes to a value. The computation is called an evaluation. Expressions can also contain variable values, and the values can be of various types, such as numbers and strings: [S1]
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```javascript
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5 * 10
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```
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```javascript
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(5 + 6) * 10
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```
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```javascript
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x * 10
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```
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```javascript
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"John" + " " + "Doe"
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```
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**JavaScript Identifiers / Names** — Identifiers are JavaScript names, used to name variables, keywords, and functions. The rules for legal names are: [S1]
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- Names can contain letters, digits, underscores, and dollar signs.
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- Names must begin with a letter, `$`, or `_`.
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- Names are case-sensitive.
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- Reserved words (like JavaScript keywords) cannot be used as names.
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**JavaScript is Case Sensitive** — All JavaScript identifiers are case-sensitive. The variables `lastName` and `lastname` are two different variables: [S1]
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```javascript
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let lastName = "Doe";
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let lastname = "Peterson";
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```
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**JavaScript and Camel Case** — Historically, programmers have used different ways of joining multiple words into one variable name: hyphens (not allowed in JavaScript — they are reserved for subtractions), underscores, Upper Camel Case (Pascal Case), and Lower Camel Case. JavaScript programmers tend to use camel case that starts with a lowercase letter. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The page's own snippets are the canonical applied examples — declaring with `let`/`const`, computing `x + y`, evaluating expressions like `(5 + 6) * 10`, and the case-sensitive `lastName`/`lastname` pair. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Declare, assign, compute:
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```javascript
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let x = 5;
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let y = 6;
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let z = x + y;
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```
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String concatenation expression:
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```javascript
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"John" + " " + "Doe"
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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For joining multiple words into one identifier, the source presents the options and JavaScript's convention: [S1]
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| Style | Example | JavaScript stance |
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|-------|---------|-------------------|
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| Hyphens | `first-name` | Not allowed (reserved for subtraction) |
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| Underscores | `first_name` | Possible |
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| Upper Camel Case (Pascal) | `FirstName` | Possible |
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| Lower Camel Case | `firstName` | Preferred convention by JavaScript programmers |
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[JavaScript Tutorial]]
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- **관련 개념:** [[JavaScript Statements]], [[JavaScript Variables]], [[JavaScript Comments]]
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- **참조 맥락:** The grammar layer underpinning every other JavaScript topic.
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## 📚 출처 (Sources)
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- [S1] W3Schools — JavaScript Syntax — https://www.w3schools.com/js/js_syntax.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript Syntax" page (Astra wiki-curation, P-Reinforce v3.1 format).
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