diff --git a/METABOX_COMPAT.md b/METABOX_COMPAT.md
index ce46878..cf86561 100644
--- a/METABOX_COMPAT.md
+++ b/METABOX_COMPAT.md
@@ -1,19 +1,62 @@
 # WooNooW Metabox & Custom Fields Compatibility
 
-## Current Status: ❌ NOT IMPLEMENTED
+## Philosophy: 3-Level Compatibility Strategy
 
-**Critical Gap:** Our SPA admin does NOT currently expose custom meta fields, metaboxes, or third-party plugin data injected via WordPress/WooCommerce hooks.
+Following `ADDON_BRIDGE_PATTERN.md`, we support plugins at 3 levels:
 
-### Example Use Case:
+### **Level 1: Native WP/WooCommerce Hooks** 🟢 (THIS DOCUMENT)
+**Community does NOTHING extra** - We listen automatically
+- Plugins use standard `add_meta_box()`, `update_post_meta()`
+- Store data in WooCommerce order/product meta
+- WooNooW exposes this data via API automatically
+- **Status: ❌ NOT IMPLEMENTED - MUST DO NOW**
+
+### **Level 2: Bridge Snippets** 🟡 (See ADDON_BRIDGE_PATTERN.md)
+**Community creates simple bridge** - For non-standard behavior
+- Plugins that bypass standard hooks (e.g., Rajaongkir custom UI)
+- WooNooW provides hook system + documentation
+- Community creates bridge snippets
+- **Status: ✅ Hook system exists, documentation provided**
+
+### **Level 3: Native WooNooW Addons** 🔵 (See ADDON_BRIDGE_PATTERN.md)
+**Community builds proper addons** - Best experience
+- Native WooNooW integration
+- Uses WooNooW addon system
+- Independent plugins
+- **Status: ✅ Addon system exists, developer docs provided**
+
+---
+
+## Current Status: ❌ LEVEL 1 NOT IMPLEMENTED
+
+**Critical Gap:** Our SPA admin does NOT currently expose custom meta fields from plugins that use standard WordPress/WooCommerce hooks.
+
+### Example Use Case (Level 1):
+```php
+// Plugin: WooCommerce Shipment Tracking
+// Uses STANDARD WooCommerce meta storage
+
+// Plugin stores data (standard WooCommerce way)
+update_post_meta($order_id, '_tracking_number', '1234567890');
+update_post_meta($order_id, '_tracking_provider', 'JNE');
+
+// Plugin displays in classic admin (standard metabox)
+add_meta_box('wc_shipment_tracking', 'Tracking Info', function($post) {
+    $tracking = get_post_meta($post->ID, '_tracking_number', true);
+    echo '<input name="_tracking_number" value="' . esc_attr($tracking) . '">';
+}, 'shop_order');
 ```
-Plugin: WooCommerce Shipment Tracking
-- Adds "Tracking Number" metabox to order edit page
-- Uses: add_meta_box('wc_shipment_tracking', ...)
-- Stores: update_post_meta($order_id, '_tracking_number', $value)
 
-Current Behavior: ❌ Field NOT visible in WooNooW admin
-Expected Behavior: ✅ Field should be visible and editable
-```
+**Current WooNooW Behavior:**
+- ❌ API doesn't expose `_tracking_number` meta
+- ❌ Frontend can't read/write this data
+- ❌ Plugin's data exists in DB but not accessible
+
+**Expected WooNooW Behavior (Level 1):**
+- ✅ API exposes `meta` object with all fields
+- ✅ Frontend can read/write meta data
+- ✅ Plugin works WITHOUT any bridge/addon
+- ✅ **Community does NOTHING extra**
 
 ---