diff --git a/scripts/check-native-shells.mjs b/scripts/check-native-shells.mjs
index 84e7c5125..909290925 100644
--- a/scripts/check-native-shells.mjs
+++ b/scripts/check-native-shells.mjs
@@ -2642,7 +2642,6 @@ function assertAiGameCreatorShellUserDevBoundary() {
     'function resolveEmbeddedPreviewUrl(',
     "url.protocol !== 'http:' || url.hostname !== '127.0.0.1'",
     'sandbox="allow-scripts allow-same-origin allow-forms allow-pointer-lock"',
-    'src={embeddedUrl}',
   ]) {
     if (
       !sourceIncludesSnippet(aiGameCreatorLocalGamePreviewFrameSource, snippet)
@@ -2652,6 +2651,29 @@ function assertAiGameCreatorShellUserDevBoundary() {
       );
     }
   }
+  // 预览框的 `src` 允许经一个短变量中转（刷新时要在地址上叠加 `__agc_reload` 这类非业务参数），
+  // 但这个变量必须由被校验过的 `embeddedUrl` 派生：只换名字、丢掉派生关系仍按漂移处理。
+  const iframeUrlDerivation = aiGameCreatorLocalGamePreviewFrameSource.match(
+    /const\s+iframeUrl\s*=\s*useMemo\(\s*\(\s*\)\s*=>\s*\{[\s\S]*?\}\s*,\s*\[/,
+  );
+  if (
+    !sourceIncludesSnippet(
+      aiGameCreatorLocalGamePreviewFrameSource,
+      'src={embeddedUrl}',
+    ) &&
+    !(
+      sourceIncludesSnippet(
+        aiGameCreatorLocalGamePreviewFrameSource,
+        'src={iframeUrl ?? undefined}',
+      ) &&
+      iframeUrlDerivation !== null &&
+      iframeUrlDerivation[0].includes('embeddedUrl')
+    )
+  ) {
+    throw new Error(
+      'AI game creator embedded preview boundary drifted: iframe src must derive from the validated embeddedUrl',
+    );
+  }
   for (const snippet of [
     "await invoke<LocalPreviewStatus>(\n        'activate_local_game_preview'",
     '已载入客户端运行视图',