diff --git a/skills/baoyu-compress-image/scripts/main.ts b/skills/baoyu-compress-image/scripts/main.ts
index 28a03e4..6b3b721 100644
--- a/skills/baoyu-compress-image/scripts/main.ts
+++ b/skills/baoyu-compress-image/scripts/main.ts
@@ -147,7 +147,9 @@ async function processFile(
   const outputSize = statSync(tempOutput).size;
 
   if (!opts.keep && absInput !== output) {
-    unlinkSync(absInput);
+    const ext = extname(absInput);
+    const base = absInput.slice(0, -ext.length);
+    renameSync(absInput, `${base}_original${ext}`);
   }
   renameSync(tempOutput, output);