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/31-seo-competitor-intel/desktop/tools/ahrefs.md

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+# Ahrefs
+
+> MCP tool documentation for competitor intelligence skill
+
+## Available Commands
+
+- `site-explorer-metrics` - Get current organic metrics for a domain
+- `site-explorer-metrics-history` - Get historical organic metrics trends
+- `site-explorer-organic-competitors` - Discover organic search competitors
+- `site-explorer-organic-keywords` - Get keyword rankings per domain
+- `site-explorer-top-pages` - Get top performing pages by traffic
+- `site-explorer-pages-by-traffic` - Get pages ranked by organic traffic
+- `site-explorer-domain-rating` - Get Domain Rating score
+- `site-explorer-domain-rating-history` - Get DR trend over time
+- `site-explorer-referring-domains` - Get list of referring domains
+- `site-explorer-backlinks-stats` - Get backlink overview statistics
+- `site-explorer-pages-history` - Get page index history
+
+## Configuration
+
+- Requires Ahrefs MCP server configured in Claude Desktop
+- API access via `mcp__ahrefs__*` tool prefix
+
+## Examples
+
+```
+# Discover competitors
+mcp__ahrefs__site-explorer-organic-competitors(target="example.com")
+
+# Get domain metrics
+mcp__ahrefs__site-explorer-metrics(target="example.com")
+
+# Get keyword rankings
+mcp__ahrefs__site-explorer-organic-keywords(target="example.com", limit=100)
+```

custom-skills/31-seo-competitor-intel/desktop/tools/notion.md

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+# Notion
+
+> MCP tool documentation for saving competitor intelligence reports
+
+## Available Commands
+
+- `notion-create-pages` - Create new pages in the SEO Audit Log database
+- `notion-update-page` - Update existing audit entries
+- `notion-query-database-view` - Query existing reports
+- `notion-search` - Search across Notion workspace
+
+## Configuration
+
+- Database ID: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
+- All reports saved with Category: "Competitor Intelligence"
+- Audit ID format: COMP-YYYYMMDD-NNN
+
+## Examples
+
+```
+# Create competitor intelligence report
+mcp__notion__notion-create-pages(
+  database_id="2c8581e5-8a1e-8035-880b-e38cefc2f3ef",
+  properties={
+    "Issue": {"title": [{"text": {"content": "경쟁사 분석 보고서 - 2025-01-15"}}]},
+    "Site": {"url": "https://example.com"},
+    "Category": {"select": {"name": "Competitor Intelligence"}},
+    "Priority": {"select": {"name": "High"}},
+    "Found Date": {"date": {"start": "2025-01-15"}},
+    "Audit ID": {"rich_text": [{"text": {"content": "COMP-20250115-001"}}]}
+  }
+)
+```

custom-skills/31-seo-competitor-intel/desktop/tools/websearch.md

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+# WebSearch
+
+> Web search tool documentation for competitor intelligence
+
+## Available Commands
+
+- `WebSearch` - Search the web for competitor information, market data, and Korean market presence
+
+## Configuration
+
+- No additional configuration required
+- Available as built-in Claude tool
+
+## Examples
+
+```
+# Check Naver Blog presence
+WebSearch(query="site:blog.naver.com competitor-domain.com")
+
+# Check Naver Cafe presence
+WebSearch(query="site:cafe.naver.com competitor-domain.com")
+
+# Research competitor market presence
+WebSearch(query="competitor-domain.com market share industry analysis")
+
+# Korean market competitor discovery
+WebSearch(query="경쟁사 분석 industry-keyword")
+```