diff --git a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef
new file mode 100644
index 0000000..ad3d122
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef	
@@ -0,0 +1,16 @@
+{
+    "name": "YooAsset.RuntimeExtension",
+    "rootNamespace": "",
+    "references": [
+        "GUID:e34a5702dd353724aa315fb8011f08c3"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}
\ No newline at end of file
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef.meta b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef.meta
new file mode 100644
index 0000000..3348f8e
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef.meta	
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 3fe1a3e70da50184f9897101cad7e4f2
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: