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/22-seo-link-building/desktop/tools/notion.md

@@ -0,0 +1,39 @@
+# Notion
+
+## Tools Used
+
+### notion-create-pages
+- **Purpose**: Save link building audit reports to SEO Audit Log
+- **Database ID**: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
+- **Required Properties**:
+  - Issue (title): Report title in Korean with date
+  - Site (url): Audited website URL
+  - Category (select): "Link Building"
+  - Priority (select): Critical / High / Medium / Low
+  - Found Date (date): YYYY-MM-DD
+  - Audit ID (rich_text): LINK-YYYYMMDD-NNN
+
+### notion-update-page
+- **Purpose**: Update existing audit entries with follow-up findings
+
+## Configuration
+
+- Notion MCP tools available via `mcp__notion__*` prefix
+- Authentication handled by MCP tool server
+
+## Examples
+
+```
+# Create a link building audit report
+mcp__notion__notion-create-pages(
+  parent={"database_id": "2c8581e5-8a1e-8035-880b-e38cefc2f3ef"},
+  properties={
+    "Issue": {"title": [{"text": {"content": "백링크 프로필 분석 - example.com (2025-01-15)"}}]},
+    "Site": {"url": "https://example.com"},
+    "Category": {"select": {"name": "Link Building"}},
+    "Priority": {"select": {"name": "High"}},
+    "Found Date": {"date": {"start": "2025-01-15"}},
+    "Audit ID": {"rich_text": [{"text": {"content": "LINK-20250115-001"}}]}
+  }
+)
+```