diff --git a/implementation-plan.md b/implementation-plan.md
index 0a616b1..aab3c70 100644
--- a/implementation-plan.md
+++ b/implementation-plan.md
@@ -20,9 +20,7 @@ PHYの正本は相対座標の木だが、既存エディタ(KLE, kle-ng)の移
 
 ### データ例
 
-以下は旧形式(`keys` 配列、`position` / `size.width`)で書かれており、現行のPHYスキーマ(`phase1-json-schema.md`)に合わせた変換が必要。
-
-#### 60% ANSI PHY Layer
+#### 60% ANSI PHY Layer (抜粋)
 
 ```json
 {
@@ -38,20 +36,22 @@ PHYの正本は相対座標の木だが、既存エディタ(KLE, kle-ng)の移
       "unitSize": { "x": 19.05, "y": 19.05 }
     }
   ],
-  "keys": [
-    // Escape key
+  "root": [
     {
-      "id": "k00", "profile": "standard",
-      "position": { "x": 0, "y": 0 },
-      "size": { "width": 1, "height": 1 },
-      "metadata": { "label": "Esc" }
+      "type": "key",
+      "id": "k00",
+      "profile": "standard",
+      "transform": { "x": 0, "y": 0, "rotation": 0 },
+      "size": { "w": 1, "h": 1 },
+      "labels": ["Esc"]
     },
-    // Space bar
     {
-      "id": "k60", "profile": "standard", 
-      "position": { "x": 5, "y": 4 },
-      "size": { "width": 6.25, "height": 1 },
-      "metadata": { "label": "Space" }
+      "type": "key",
+      "id": "k60",
+      "profile": "standard",
+      "transform": { "x": 5, "y": 4, "rotation": 0 },
+      "size": { "w": 6.25, "h": 1 },
+      "labels": ["Space"]
     }
   ]
 }