diff --git a/dist/index.js b/dist/index.js
index 607119c..2e74238 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -45942,10 +45942,9 @@ async function format(bufPath, inputs) {
     if (result.status == Status.Failed && result.stdout.startsWith("diff")) {
         // If the format step fails, parse the diff and write github annotations.
         const diff = parse_diff(result.stdout);
-        result.stdout = ""; // Clear the stdout.
-        console.log("diff", diff);
+        result.stdout = ""; // Clear the stdout to count the number of changes.
         for (const file of diff) {
-            result.stdout += `::error file=${file.to}::Format failed -${file.deletions} +${file.additions} changes.\n`;
+            result.stdout += `::error file=${file.to},title=Buf format::Diff -${file.deletions}/+${file.additions}.\n`;
         }
         console.log(result.stdout);
     }
diff --git a/src/main.ts b/src/main.ts
index 4d81ede..f0811d1 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -232,10 +232,9 @@ async function format(bufPath: string, inputs: Inputs): Promise<Result> {
   if (result.status == Status.Failed && result.stdout.startsWith("diff")) {
     // If the format step fails, parse the diff and write github annotations.
     const diff = parseDiff(result.stdout);
-    result.stdout = ""; // Clear the stdout.
-    console.log("diff", diff);
+    result.stdout = ""; // Clear the stdout to count the number of changes.
     for (const file of diff) {
-      result.stdout += `::error file=${file.to}::Format failed -${file.deletions} +${file.additions} changes.\n`;
+      result.stdout += `::error file=${file.to},title=Buf format::Diff -${file.deletions}/+${file.additions}.\n`;
     }
     console.log(result.stdout);
   }