diff --git a/src/github/operations/comment-logic.ts b/src/github/operations/comment-logic.ts
index bc0253d..6a4551a 100644
--- a/src/github/operations/comment-logic.ts
+++ b/src/github/operations/comment-logic.ts
@@ -183,7 +183,7 @@ export function updateCommentBody(input: CommentUpdateInput): string {
 
   // Add error details if available
   if (actionFailed && errorDetails) {
-    newBody += `\n\n<details>\n<summary>Error details</summary>\n\n\`\`\`\n${errorDetails}\n\`\`\`\n\n</details>`;
+    newBody += `\n\n\`\`\`\n${errorDetails}\n\`\`\``;
   }
 
   newBody += `\n\n---\n`;
diff --git a/test/comment-logic.test.ts b/test/comment-logic.test.ts
index 7488400..82fec08 100644
--- a/test/comment-logic.test.ts
+++ b/test/comment-logic.test.ts
@@ -51,11 +51,9 @@ describe("updateCommentBody", () => {
       const result = updateCommentBody(input);
       expect(result).toContain("**Claude encountered an error after 45s**");
       expect(result).toContain("[View job]");
-      expect(result).toContain("<details>");
-      expect(result).toContain("<summary>Error details</summary>");
-      expect(result).toContain("Failed to fetch issue data");
+      expect(result).toContain("```\nFailed to fetch issue data\n```");
       // Ensure error details come after the header/links
-      const errorIndex = result.indexOf("<details>");
+      const errorIndex = result.indexOf("```");
       const headerIndex = result.indexOf("**Claude encountered an error");
       expect(errorIndex).toBeGreaterThan(headerIndex);
     });