diff --git a/apps/ai-game-creator-shell/src-tauri/src/main.rs b/apps/ai-game-creator-shell/src-tauri/src/main.rs
index 1f51a98ae..b8096e5d1 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/main.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/main.rs
@@ -334,6 +334,8 @@ async fn separate_ui(
     asset_id: String,
     state: ui_editor::state::State,
 ) -> Result<ui_editor::commands::SeparationDTO, String> {
+    let root = Path::new(project_path.trim());
+    enforce_project_permission_policy(root, "asset.register")?;
     ui_editor::commands::separate_ui_impl(project_path, asset_id, state).await
 }