Restructure skill numbering: SEO 11-30, GTM 60-69, reserve 19-28 for future skills

Renumber 12 existing skills to new ranges:
- SEO: 11→13, 12→18, 13→16, 14→17, 15→14, 16→15, 17→29, 18→30, 19→12
- GTM: 20→60, 21→61, 22→62

Update cross-references in gateway architect/builder skills, GTM guardian
README, CLAUDE.md (skill tables + directory layout), and AGENTS.md
(domain routing ranges).

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

custom-skills/30-seo-gateway-builder/code/CLAUDE.md

@@ -0,0 +1,117 @@
+# CLAUDE.md
+
+## Overview
+
+Gateway page content generator for local services. Creates SEO-optimized pages from location/service configurations.
+
+## Quick Start
+
+```bash
+# Generate pages from config
+python scripts/generate_pages.py --config config/services.json --locations config/locations.json
+```
+
+## Scripts
+
+| Script | Purpose |
+|--------|---------|
+| `generate_pages.py` | Generate gateway pages from templates |
+
+## Page Generator
+
+```bash
+# Generate all combinations
+python scripts/generate_pages.py \
+  --config config/services.json \
+  --locations config/locations.json \
+  --output ./pages
+
+# Single service/location
+python scripts/generate_pages.py \
+  --service "laser_hair_removal" \
+  --location "gangnam" \
+  --template templates/gateway-page-medical.md
+```
+
+## Configuration Files
+
+### services.json
+```json
+{
+  "services": [
+    {
+      "id": "laser_hair_removal",
+      "korean": "레이저 제모",
+      "keywords": ["laser hair removal", "permanent hair removal"]
+    }
+  ]
+}
+```
+
+### locations.json
+```json
+{
+  "locations": [
+    {
+      "id": "gangnam",
+      "korean": "강남",
+      "full_address": "서울특별시 강남구"
+    }
+  ]
+}
+```
+
+## Templates
+
+- `templates/gateway-page-medical.md` - Medical service template
+- Supports variables: `{{service}}`, `{{location}}`, `{{brand}}`
+
+## Output
+
+Generates markdown files with:
+- SEO-optimized title and meta
+- Structured content sections
+- Schema markup recommendations
+- Internal linking suggestions
+
+## Workflow
+
+1. Get strategy from `29-seo-gateway-architect`
+2. Configure services and locations
+3. Run generator for content drafts
+4. Review and customize output
+
+## Notion Output (Required)
+
+**IMPORTANT**: All audit reports MUST be saved 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 | Audited website URL |
+| Category | Select | Technical SEO, On-page SEO, Performance, Schema/Structured Data, Sitemap, Robots.txt, Content, Local SEO |
+| Priority | Select | Critical, High, Medium, Low |
+| Found Date | Date | Audit date (YYYY-MM-DD) |
+| Audit ID | Rich Text | Format: [TYPE]-YYYYMMDD-NNN |
+
+### Language Guidelines
+
+- Report content in Korean (한국어)
+- Keep technical English terms as-is (e.g., SEO Audit, Core Web Vitals, Schema Markup)
+- URLs and code remain unchanged
+
+### Example MCP Call
+
+```bash
+mcp-cli call notion/API-post-page '{"parent": {"database_id": "2c8581e5-8a1e-8035-880b-e38cefc2f3ef"}, "properties": {...}}'
+```
+