diff --git a/ui/src/components/task-chat/TaskChatBubble.test.tsx b/ui/src/components/task-chat/TaskChatBubble.test.tsx
index 00d8746155..70fe754ae9 100644
--- a/ui/src/components/task-chat/TaskChatBubble.test.tsx
+++ b/ui/src/components/task-chat/TaskChatBubble.test.tsx
@@ -285,6 +285,29 @@ describe("TaskChatBubble accent-bubble text color", () => {
 });
 
 describe("TaskChatBubble agent page-surface treatment", () => {
+  it("does not show an on-behalf-of badge in the new task view", () => {
+    const container = document.createElement("div");
+    document.body.appendChild(container);
+    const root = createRoot(container);
+
+    flushSync(() =>
+      root.render(
+        <ThemeProvider>
+          <TaskChatBubble
+            item={{ id: "attributed", kind: "message", author: "agent", authorName: "Fable", onBehalfOfUserName: "Dotta", text: "Done." }}
+          />
+        </ThemeProvider>,
+      ),
+    );
+
+    expect(container.textContent).toContain("Fable");
+    expect(container.textContent).not.toContain("for Dotta");
+    expect(container.querySelector('[data-testid="comment-attribution-chip"]')).toBeNull();
+
+    flushSync(() => root.unmount());
+    container.remove();
+  });
+
   it("renders agent prose without a card background or constrained width", () => {
     const container = document.createElement("div");
     document.body.appendChild(container);
diff --git a/ui/src/components/task-chat/TaskChatBubble.tsx b/ui/src/components/task-chat/TaskChatBubble.tsx
index 3caae25934..bc51a51133 100644
--- a/ui/src/components/task-chat/TaskChatBubble.tsx
+++ b/ui/src/components/task-chat/TaskChatBubble.tsx
@@ -11,7 +11,6 @@ import {
 } from "@/components/ImageGalleryModal";
 import { Avatar, AvatarFallback } from "@/components/ui/avatar";
 import { AgentIcon } from "@/components/AgentIconPicker";
-import { CommentAttributionChip } from "@/components/CommentAttributionChip";
 import {
   Attachment,
   AttachmentContent,
@@ -75,11 +74,9 @@ function initialsForName(name: string) {
 export function TaskChatAgentIdentity({
   agentName,
   agentIcon,
-  onBehalfOfUserName,
 }: {
   agentName: string;
   agentIcon?: string | null;
-  onBehalfOfUserName?: string;
 }) {
   return (
     <span
@@ -100,12 +97,6 @@ export function TaskChatAgentIdentity({
         )}
       </Avatar>
       <span className="text-sm font-semibold text-foreground">{agentName}</span>
-      {onBehalfOfUserName ? (
-        <CommentAttributionChip
-          agentName={agentName}
-          userName={onBehalfOfUserName}
-        />
-      ) : null}
     </span>
   );
 }
@@ -241,7 +232,6 @@ function TaskChatBubbleContent({
         <TaskChatAgentIdentity
           agentName={item.authorName}
           agentIcon={item.agentIcon}
-          onBehalfOfUserName={item.onBehalfOfUserName}
         />
       ) : null}
       {bodyText.length > 0 ? (