diff --git a/frontend/src/components/workspace/messages/message-list-item.tsx b/frontend/src/components/workspace/messages/message-list-item.tsx
index 209af955..07c4bcd1 100644
--- a/frontend/src/components/workspace/messages/message-list-item.tsx
+++ b/frontend/src/components/workspace/messages/message-list-item.tsx
@@ -53,6 +53,22 @@ function localizeAssistantFixedCopy(content: string, localized: string): string
   return content;
 }
 
+function buildClipboardData(message: Message): string {
+  const raw =
+    extractContentFromMessage(message) ??
+    extractReasoningContentFromMessage(message) ??
+    "";
+  if (!raw) {
+    return "";
+  }
+
+  const cleaned = stripUploadedFilesTag(raw);
+  if (message.type === "human") {
+    return normalizeHumanMessageDisplayText(stripPriorityHintSuffix(cleaned));
+  }
+  return cleaned;
+}
+
 export function MessageListItem({
   className,
   message,
@@ -90,13 +106,7 @@ export function MessageListItem({
           )}
         >
           <div className="flex gap-1">
-            <CopyButton
-              clipboardData={
-                extractContentFromMessage(message) ??
-                extractReasoningContentFromMessage(message) ??
-                ""
-              }
-            />
+            <CopyButton clipboardData={buildClipboardData(message)} />
           </div>
         </MessageToolbar>
       )}