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/25-seo-kpi-framework/desktop/SKILL.md

@@ -0,0 +1,107 @@
+---
+name: seo-kpi-framework
+description: |
+  SEO KPI and performance framework for unified metrics, health scores, ROI, and period-over-period reporting.
+  Triggers: SEO KPI, performance report, health score, SEO metrics, ROI, baseline, targets.
+---
+
+# SEO KPI & Performance Framework
+
+## Purpose
+
+Aggregate SEO KPIs across all dimensions into a unified dashboard. Establish baselines, set targets (30/60/90-day), generate executive summaries with health scores, provide tactical breakdowns, estimate ROI using Ahrefs traffic cost, and support period-over-period comparison (MoM, QoQ, YoY).
+
+## Core Capabilities
+
+1. **KPI Aggregation** - Unified metrics across 7 dimensions (traffic, rankings, links, technical, content, engagement, local)
+2. **Health Scoring** - Weighted 0-100 score with trend direction
+3. **Baseline & Targets** - Establish baselines and set 30/60/90 day growth targets
+4. **ROI Estimation** - Traffic value from Ahrefs organic cost
+5. **Performance Reporting** - Period-over-period comparison with executive summary
+6. **Tactical Breakdown** - Actionable next steps per dimension
+
+## MCP Tool Usage
+
+### Ahrefs for SEO Metrics
+```
+mcp__ahrefs__site-explorer-metrics: Current organic metrics snapshot
+mcp__ahrefs__site-explorer-metrics-history: Historical trend data
+mcp__ahrefs__site-explorer-metrics-by-country: Country-level breakdown
+mcp__ahrefs__site-explorer-domain-rating-history: Domain rating trend
+mcp__ahrefs__site-explorer-total-search-volume-history: Keyword volume trend
+```
+
+### Notion for Report Storage
+```
+mcp__notion__*: Save reports to SEO Audit Log database
+```
+
+## Workflow
+
+### 1. KPI Aggregation
+1. Fetch site-explorer-metrics for current organic data
+2. Extract traffic, ranking, link, technical, content metrics
+3. Calculate dimension scores with weights (traffic 25%, rankings 20%, technical 20%, content 15%, links 15%, local 5%)
+4. Compute overall health score (0-100)
+5. Set 30/60/90 day targets (5%/10%/20% improvement)
+6. Estimate ROI from Ahrefs traffic cost (divide raw cost by 100 for USD)
+
+### 2. Performance Reporting
+1. Determine date range from period (monthly/quarterly/yearly/custom)
+2. Fetch metrics-history for current and previous period
+3. Calculate period-over-period changes
+4. Identify wins (>5% improvement) and concerns (>5% decline)
+5. Generate executive summary with trend arrows
+6. Create tactical breakdown with actionable next steps
+7. Compare against targets if provided
+
+## Output Format
+
+```markdown
+## SEO KPI Dashboard: [domain]
+
+### Health Score: [score]/100 ([trend])
+
+### KPI Summary
+| Dimension | Score | Key Metric | Trend |
+|-----------|-------|------------|-------|
+| Traffic | [score] | [organic_traffic] | [arrow] |
+| Rankings | [score] | [visibility] | [arrow] |
+| Links | [score] | [DR] | [arrow] |
+| Technical | [score] | [health] | [arrow] |
+| Content | [score] | [indexed_pages] | [arrow] |
+
+### Executive Summary
+- Top Wins: [list]
+- Top Concerns: [list]
+- Recommendations: [list]
+
+### Targets (30/60/90 day)
+[Target table with progress bars]
+```
+
+## Key Metrics
+
+| Dimension | Metrics | Source |
+|-----------|---------|--------|
+| Traffic | Organic traffic, traffic value (USD) | site-explorer-metrics |
+| Rankings | Visibility score, top10 keywords | site-explorer-metrics |
+| Links | Domain rating, referring domains | domain-rating, metrics |
+| Technical | Pages crawled, technical health | site-explorer-metrics |
+| Content | Indexed pages, freshness score | site-explorer-metrics |
+| Local | GBP visibility, review score | External data |
+
+## Limitations
+
+- Local KPIs require external GBP data (not available via Ahrefs)
+- Engagement KPIs (bounce rate, session duration) require Google Analytics
+- Technical health is estimated heuristically from available data
+- ROI is estimated from Ahrefs traffic cost, not actual revenue
+
+## Notion Output (Required)
+
+All reports MUST be saved to OurDigital SEO Audit Log:
+- **Database ID**: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
+- **Properties**: Issue (title), Site (url), Category, Priority, Found Date, Audit ID
+- **Language**: Korean with English technical terms
+- **Audit ID Format**: KPI-YYYYMMDD-NNN

custom-skills/25-seo-kpi-framework/desktop/skill.yaml

@@ -0,0 +1,8 @@
+name: seo-kpi-framework
+description: |
+  SEO KPI and performance framework. Triggers: SEO KPI, performance report, health score, SEO metrics, ROI, baseline, targets.
+allowed-tools:
+  - mcp__ahrefs__*
+  - mcp__notion__*
+  - WebSearch
+  - WebFetch

custom-skills/25-seo-kpi-framework/desktop/tools/ahrefs.md

@@ -0,0 +1,15 @@
+# Ahrefs
+
+> TODO: Document tool usage for this skill
+
+## Available Commands
+
+- [ ] List commands
+
+## Configuration
+
+- [ ] Add configuration details
+
+## Examples
+
+- [ ] Add usage examples

custom-skills/25-seo-kpi-framework/desktop/tools/notion.md

@@ -0,0 +1,15 @@
+# Notion
+
+> TODO: Document tool usage for this skill
+
+## Available Commands
+
+- [ ] List commands
+
+## Configuration
+
+- [ ] Add configuration details
+
+## Examples
+
+- [ ] Add usage examples

custom-skills/25-seo-kpi-framework/desktop/tools/websearch.md

@@ -0,0 +1,15 @@
+# WebSearch
+
+> TODO: Document tool usage for this skill
+
+## Available Commands
+
+- [ ] List commands
+
+## Configuration
+
+- [ ] Add configuration details
+
+## Examples
+
+- [ ] Add usage examples