refactor(skills): Restructure skills to dual-platform architecture

Major refactoring of ourdigital-custom-skills with new numbering system:

## Structure Changes
- Each skill now has code/ (Claude Code) and desktop/ (Claude Desktop) versions
- New progressive numbering: 01-09 General, 10-19 SEO, 20-29 GTM, 30-39 OurDigital, 40-49 Jamie

## Skill Reorganization
- 01-notion-organizer (from 02)
- 10-18: SEO tools split into focused skills (technical, on-page, local, schema, vitals, gsc, gateway)
- 20-21: GTM audit and manager
- 30-32: OurDigital designer, research, presentation
- 40-41: Jamie brand editor and audit

## New Files
- .claude/commands/: Slash command definitions for all skills
- CLAUDE.md: Updated with new skill structure documentation
- REFACTORING_PLAN.md: Migration documentation
- COMPATIBILITY_REPORT.md, SKILLS_COMPARISON.md: Analysis docs

## Removed
- Old skill directories (02-05, 10-14, 20-21 old numbering)
- Consolidated into new structure with _archive/ for reference

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ourdigital-custom-skills/21-gtm-manager/code/docs/ecommerce_schema.md

@@ -0,0 +1,216 @@
+# E-commerce DataLayer Schema Reference
+
+## GA4 E-commerce Structure
+
+### Items Array Schema
+Every e-commerce event requires an `items` array:
+
+```javascript
+items: [{
+  // Required
+  item_id: "SKU_12345",
+  item_name: "Blue T-Shirt",
+  
+  // Recommended
+  affiliation: "Store Name",
+  coupon: "SUMMER_SALE",
+  discount: 5.00,
+  index: 0,
+  item_brand: "Brand Name",
+  item_category: "Apparel",
+  item_category2: "Men",
+  item_category3: "Shirts",
+  item_category4: "T-Shirts",
+  item_category5: "Short Sleeve",
+  item_list_id: "related_products",
+  item_list_name: "Related Products",
+  item_variant: "Blue/Large",
+  location_id: "ChIJIQBpAG2ahYAR_6128GcTUEo",
+  price: 29.99,
+  quantity: 1
+}]
+```
+
+### Clear Previous E-commerce Data
+Always clear before new e-commerce event:
+
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "view_item",
+  ecommerce: {
+    // new data
+  }
+});
+```
+
+## Complete Purchase Flow
+
+### 1. Product List View
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "view_item_list",
+  ecommerce: {
+    item_list_id: "category_results",
+    item_list_name: "Category Results",
+    items: [
+      { item_id: "SKU_001", item_name: "Product 1", index: 0, price: 29.99 },
+      { item_id: "SKU_002", item_name: "Product 2", index: 1, price: 39.99 }
+    ]
+  }
+});
+```
+
+### 2. Product Click
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "select_item",
+  ecommerce: {
+    item_list_id: "category_results",
+    item_list_name: "Category Results",
+    items: [{
+      item_id: "SKU_001",
+      item_name: "Product 1",
+      price: 29.99
+    }]
+  }
+});
+```
+
+### 3. Product Detail View
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "view_item",
+  ecommerce: {
+    currency: "USD",
+    value: 29.99,
+    items: [{
+      item_id: "SKU_001",
+      item_name: "Product 1",
+      item_brand: "Brand",
+      item_category: "Category",
+      price: 29.99,
+      quantity: 1
+    }]
+  }
+});
+```
+
+### 4. Add to Cart
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "add_to_cart",
+  ecommerce: {
+    currency: "USD",
+    value: 29.99,
+    items: [{
+      item_id: "SKU_001",
+      item_name: "Product 1",
+      price: 29.99,
+      quantity: 1
+    }]
+  }
+});
+```
+
+### 5. View Cart
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "view_cart",
+  ecommerce: {
+    currency: "USD",
+    value: 59.98,
+    items: [
+      { item_id: "SKU_001", item_name: "Product 1", price: 29.99, quantity: 1 },
+      { item_id: "SKU_002", item_name: "Product 2", price: 29.99, quantity: 1 }
+    ]
+  }
+});
+```
+
+### 6. Begin Checkout
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "begin_checkout",
+  ecommerce: {
+    currency: "USD",
+    value: 59.98,
+    coupon: "DISCOUNT10",
+    items: [...]
+  }
+});
+```
+
+### 7. Add Shipping Info
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "add_shipping_info",
+  ecommerce: {
+    currency: "USD",
+    value: 59.98,
+    shipping_tier: "Standard",
+    items: [...]
+  }
+});
+```
+
+### 8. Add Payment Info
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "add_payment_info",
+  ecommerce: {
+    currency: "USD",
+    value: 59.98,
+    payment_type: "Credit Card",
+    items: [...]
+  }
+});
+```
+
+### 9. Purchase
+```javascript
+dataLayer.push({ ecommerce: null });
+dataLayer.push({
+  event: "purchase",
+  ecommerce: {
+    transaction_id: "T_12345",
+    value: 65.97,
+    tax: 4.99,
+    shipping: 5.99,
+    currency: "USD",
+    coupon: "DISCOUNT10",
+    items: [{
+      item_id: "SKU_001",
+      item_name: "Product 1",
+      affiliation: "Online Store",
+      coupon: "DISCOUNT10",
+      discount: 3.00,
+      item_brand: "Brand",
+      item_category: "Category",
+      price: 29.99,
+      quantity: 1
+    }]
+  }
+});
+```
+
+## Korean E-commerce Considerations
+
+### Currency
+```javascript
+currency: "KRW",
+value: 35000  // No decimals for KRW
+```
+
+### Common Korean Platform Integrations
+- Cafe24: Uses custom dataLayer structure
+- Shopify Korea: Standard GA4 format
+- Naver SmartStore: Custom pixel implementation