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: html-headings
+title: "HTML Headings"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["heading tags", "h1", "h2", "h6", "headings hierarchy", "HTML titles"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.90
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["html", "web", "frontend", "w3schools", "headings", "semantics"]
+raw_sources: ["https://www.w3schools.com/html/html_headings.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HTML Headings]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+HTML headings `<h1>`–`<h6>` express the importance and structure of content (not merely its size), with `<h1>` most important and `<h6>` least. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Six heading levels** — `<h1>` through `<h6>`. [S1]
+- **Importance, not size** — `<h1>` defines the most important heading; `<h6>` the least important. [S1]
+- **Browsers add margins** — browsers automatically add some white space (a margin) before and after a heading. [S1]
+- **Headings are for structure** — search engines use headings to index the structure and content of web pages; users skim them to grasp a page. [S1]
+- **Size is styled with CSS** — use the `style` attribute with `font-size` to change a heading's rendered size. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **One `<h1>` per page** — use `<h1>` for the main title (or logo). [S1]
+- **Logical hierarchy** — `<h1>` for page title → `<h2>` for section titles → `<h3>` for subsections, in order. [S1]
+- **Don't misuse headings for visuals** — do not use headings just to make text big or bold; use CSS for that. [S1]
+- **Resize via inline style** — `<h1 style="font-size:60px;">…</h1>`. [S1]
+
+## 📖 세부 내용 (Details)
+**HTML Headings**
+HTML headings are titles or subtitles that you want to display on a webpage. They are defined with the `<h1>` to `<h6>` tags. `<h1>` defines the most important heading; `<h6>` defines the least important heading: [S1]
+```html
+<h1>Heading 1</h1>
+<h2>Heading 2</h2>
+<h3>Heading 3</h3>
+<h4>Heading 4</h4>
+<h5>Heading 5</h5>
+<h6>Heading 6</h6>
+```
+
+> **Note:** Browsers automatically add some white space (a margin) before and after a heading. [S1]
+
+**Headings Are Important**
+Headings are important. Search engines use the headings to index the structure and content of your web pages. Users often skim a page by its headings; it is important to use headings to show the document structure. `<h1>` headings should be used for main headings, followed by `<h2>` headings, then the less important `<h3>`, and so on. [S1]
+
+> **Note:** Use HTML headings for headings only. Don't use headings to make text BIG or **bold**. [S1]
+
+**Bigger Headings**
+Each HTML heading has a default size. However, you can specify the size for any heading with the `style` attribute, using the CSS `font-size` property: [S1]
+```html
+<h1 style="font-size:60px;">Heading 1</h1>
+```
+
+**Heading reference table**
+
+| Tag | Description |
+|---|---|
+| `<html>` | Defines the root of an HTML document |
+| `<body>` | Defines the document's body |
+| `<h1>` to `<h6>` | Defines HTML headings |
+
+## 🛠️ 적용 사례 (Applied in summary)
+A typical applied structure (e.g. a travel guide) uses `<h1>` for the page title, `<h2>` for region/section titles, and `<h3>` for country/subsection titles — demonstrating heading hierarchy as document outline. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+All six heading levels (HTML):
+```html
+<h1>Heading 1</h1>
+<h2>Heading 2</h2>
+<h3>Heading 3</h3>
+<h4>Heading 4</h4>
+<h5>Heading 5</h5>
+<h6>Heading 6</h6>
+```
+Resizing a heading with inline CSS:
+```html
+<h1 style="font-size:60px;">Heading 1</h1>
+```
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+The source stresses semantics over appearance: headings should encode document structure for search engines and users, not be repurposed to make text big or bold — use CSS `font-size` instead. [S1]
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.90
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[HTML Tutorial]]
+- **관련 개념:** [[HTML Paragraphs]], [[HTML Basic]], [[HTML Styles]], [[HTML Elements]]
+- **참조 맥락:** Referenced whenever structuring page content into titles and sections for readers and search engines.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — HTML Headings — https://www.w3schools.com/html/html_headings.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Headings" page (Astra wiki-curation, P-Reinforce v3.1 format).