diff --git a/apps/ai-game-creator-shell/src-tauri/src/export/registry.rs b/apps/ai-game-creator-shell/src-tauri/src/export/registry.rs
index 656f22d8b..cbf66fa52 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/export/registry.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/export/registry.rs
@@ -133,7 +133,12 @@ fn write_atomically(path: &Path, text: &str) -> Result<(), RegistryError> {
     })?;
     let temp = temp_path(path);
     let write = || -> std::io::Result<()> {
-        let mut file = fs::File::create(&temp)?;
+        // `create_new`（O_EXCL）不跟随已存在的路径：项目里预先摆好的同名符号链接或残留文件会让
+        // 这次写入直接失败，而不是把链接指向的文件截断成注册表内容。
+        let mut file = fs::OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .open(&temp)?;
         file.write_all(text.as_bytes())?;
         // 替换前落盘：只 flush 的话，崩溃窗口里换过去的可能是还没写完的内容。
         file.sync_all()