Add SEO skills 19-28, 31-32 with full Python implementations

12 new skills: Keyword Strategy, SERP Analysis, Position Tracking,
Link Building, Content Strategy, E-Commerce SEO, KPI Framework,
International SEO, AI Visibility, Knowledge Graph, Competitor Intel,
and Crawl Budget. ~20K lines of Python across 25 domain scripts.
Updated skill 11 pipeline table and repo CLAUDE.md.
Enhanced skill 18 local SEO workflow from jamie.clinic audit.

Note: Skill 26 hreflang_validator.py pending (content filter block).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom-skills/28-seo-knowledge-graph/desktop/tools/ahrefs.md

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+# Ahrefs MCP Tools
+
+## serp-overview
+
+Retrieve SERP feature overview for specified keywords. Used to detect Knowledge Panel, PAA, FAQ rich results, and other SERP features for entity-related queries.
+
+### Parameters
+
+| Parameter | Type | Required | Description |
+|-----------|------|----------|-------------|
+| keyword | string | Yes | Keyword to check SERP features for |
+| country | string | No | Country code (default: us) |
+
+### Usage
+
+```
+mcp__ahrefs__serp-overview(keyword="Samsung Electronics", country="us")
+```
+
+### Relevant SERP Features
+
+- Knowledge Panel
+- People Also Ask (PAA)
+- FAQ Rich Results
+- Featured Snippet
+- Sitelinks
+- Image Pack
+- Video Carousel
+- Local Pack

custom-skills/28-seo-knowledge-graph/desktop/tools/notion.md

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+# Notion MCP Tools
+
+## Save Audit Report
+
+Save Knowledge Graph & Entity SEO audit reports to the OurDigital SEO Audit Log database.
+
+### Database Configuration
+
+| Field | Value |
+|-------|-------|
+| Database ID | `2c8581e5-8a1e-8035-880b-e38cefc2f3ef` |
+| URL | https://www.notion.so/dintelligence/2c8581e58a1e8035880be38cefc2f3ef |
+
+### Required Properties
+
+| Property | Type | Description |
+|----------|------|-------------|
+| Issue | Title | Report title (Korean + date) |
+| Site | URL | Entity website URL |
+| Category | Select | Knowledge Graph & Entity SEO |
+| Priority | Select | Critical / High / Medium / Low |
+| Found Date | Date | Audit date (YYYY-MM-DD) |
+| Audit ID | Rich Text | Format: KG-YYYYMMDD-NNN |
+
+### Priority Mapping
+
+| Overall Score | Priority |
+|---------------|----------|
+| 0-25 | Critical |
+| 26-50 | High |
+| 51-75 | Medium |
+| 76-100 | Low |
+
+### Example Usage
+
+```
+mcp__notion__notion-create-pages({
+  "parent": {"database_id": "2c8581e5-8a1e-8035-880b-e38cefc2f3ef"},
+  "properties": {
+    "Issue": {"title": [{"text": {"content": "Knowledge Graph 엔티티 분석 - 2025-01-15"}}]},
+    "Site": {"url": "https://example.com"},
+    "Category": {"select": {"name": "Knowledge Graph & Entity SEO"}},
+    "Priority": {"select": {"name": "High"}},
+    "Found Date": {"date": {"start": "2025-01-15"}},
+    "Audit ID": {"rich_text": [{"text": {"content": "KG-20250115-001"}}]}
+  }
+})
+```
+
+### Language Guidelines
+
+- Report content in Korean (한국어)
+- Keep technical English terms as-is (Knowledge Panel, Knowledge Graph, PAA, FAQ, schema)
+- URLs and code remain unchanged

custom-skills/28-seo-knowledge-graph/desktop/tools/websearch.md

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+# WebSearch & WebFetch Tools
+
+## WebSearch
+
+Search the web for entity/brand information to detect Knowledge Panel signals, PAA questions, and SERP features.
+
+### Usage Patterns
+
+#### Knowledge Panel Detection
+```
+WebSearch("Samsung Electronics")
+WebSearch("삼성전자")
+```
+
+#### PAA Question Discovery
+```
+WebSearch("what is Samsung Electronics")
+WebSearch("Samsung Electronics reviews")
+WebSearch("Samsung Electronics alternatives")
+```
+
+#### Brand SERP Analysis
+```
+WebSearch("Brand Name official")
+WebSearch("Brand Name site:wikipedia.org")
+```
+
+## WebFetch
+
+Fetch and analyze specific pages for entity presence data.
+
+### Usage Patterns
+
+#### Wikipedia Check
+```
+WebFetch("https://en.wikipedia.org/wiki/Samsung_Electronics", "Check if article exists and extract entity information")
+```
+
+#### Wikidata Check
+```
+WebFetch("https://www.wikidata.org/w/api.php?action=wbsearchentities&search=Samsung&language=en&format=json", "Find Wikidata QID for entity")
+```
+
+#### Naver Encyclopedia
+```
+WebFetch("https://terms.naver.com/search.naver?query=삼성전자", "Check Naver encyclopedia entry")
+```
+
+#### Naver Knowledge iN
+```
+WebFetch("https://kin.naver.com/search/list.naver?query=삼성전자", "Check knowledge iN entries count")
+```
+
+#### Website Schema Extraction
+```
+WebFetch("https://example.com", "Extract JSON-LD structured data, especially Organization, Person, LocalBusiness schemas and sameAs links")
+```
+
+#### FAQ Schema Check
+```
+WebFetch("https://example.com/faq", "Check for FAQPage JSON-LD schema markup")
+```