1 changed files with 5 additions and 2 deletions
@@ -26,13 +26,16 @@ export function createMessage(
  content: string,
  attachments?: ChatAttachment[],
 ): ChatMessage {
-  return {
+  const base = {
    id: crypto.randomUUID(),
    role,
    content,
-    attachments: attachments && attachments.length > 0 ? attachments : undefined,
    timestamp: new Date().toISOString(),
  };
+  if (attachments && attachments.length > 0) {
+    return Object.freeze({ ...base, attachments });
+  }
+  return Object.freeze(base);
 }

 // appendMessageDeduped adds a ChatMessage to `prev` unless the tail