diff --git a/apps/ai-game-creator-shell/src/App.tsx b/apps/ai-game-creator-shell/src/App.tsx
index cc58ed5c8..3fefcbd56 100644
--- a/apps/ai-game-creator-shell/src/App.tsx
+++ b/apps/ai-game-creator-shell/src/App.tsx
@@ -731,7 +731,10 @@ export function App({
     null,
   );
   planningV2SessionRef.current = planningV2Session;
-  const [planningV2TransientReply, setPlanningV2TransientReply] = useState('');
+  const [planningV2TransientReply, setPlanningV2TransientReplyVisible] =
+    useState('');
+  const planningV2TransientReplyTargetRef = useRef('');
+  const planningV2VisibleReplyRef = useRef('');
   const [planningV2Reasoning, setPlanningV2Reasoning] = useState('');
   const planningV2TurnRef = useRef<{
     projectPath: string;
@@ -752,6 +755,37 @@ export function App({
     >(),
   );
 
+  function setPlanningV2TransientReplyTarget(next: string) {
+    planningV2TransientReplyTargetRef.current = next;
+    if (!next) {
+      planningV2VisibleReplyRef.current = '';
+      setPlanningV2TransientReplyVisible('');
+    }
+  }
+
+  useEffect(() => {
+    const timer = window.setInterval(() => {
+      const target = planningV2TransientReplyTargetRef.current;
+      setPlanningV2TransientReplyVisible((current) => {
+        if (!target) {
+          planningV2VisibleReplyRef.current = '';
+          return '';
+        }
+        const prefix = target.startsWith(current) ? current : '';
+        if (prefix === target) {
+          planningV2VisibleReplyRef.current = target;
+          return target;
+        }
+        const remaining = target.length - prefix.length;
+        const step = remaining > 160 ? 8 : remaining > 48 ? 4 : 2;
+        const next = target.slice(0, prefix.length + step);
+        planningV2VisibleReplyRef.current = next;
+        return next;
+      });
+    }, 32);
+    return () => window.clearInterval(timer);
+  }, []);
+
   function applyPlanningV2CommandResult(
     result: PlanningSessionCommandResultV2,
     clientTurnId?: string,
@@ -920,7 +954,7 @@ export function App({
     };
     setChatAgentBusy(true);
     setProjectSupervisorRuntimeError('');
-    setPlanningV2TransientReply('');
+    setPlanningV2TransientReplyTarget('');
     try {
       const view = await invoke<DesignView>('continue_design_agent_session', {
         projectPath: nextProjectPath,
@@ -943,7 +977,7 @@ export function App({
       setPlanGddError(message);
     } finally {
       designAgentTurnRef.current = null;
-      setPlanningV2TransientReply('');
+      setPlanningV2TransientReplyTarget('');
       setChatAgentBusy(false);
     }
   }
@@ -1434,7 +1468,7 @@ export function App({
     setProjectSupervisorResponseStream(null);
     setProjectSupervisorRuntimeError('');
     setPlanningV2Session(null);
-    setPlanningV2TransientReply('');
+    setPlanningV2TransientReplyTarget('');
     setPlanningV2Active(planningStartMode);
     planningV2ActiveRef.current = planningStartMode;
     designAgentLaneRef.current = planningStartMode;
@@ -1821,7 +1855,7 @@ export function App({
           return;
         }
         if (payload.status === 'started') {
-          setPlanningV2TransientReply(
+          setPlanningV2TransientReplyTarget(
             payload.accumulatedText || '正在生成策划方案…',
           );
           setProjectSupervisorRuntimeError('');
@@ -1830,7 +1864,7 @@ export function App({
           payload.status === 'delta' &&
           (payload.accumulatedText || payload.deltaText)
         ) {
-          setPlanningV2TransientReply(
+          setPlanningV2TransientReplyTarget(
             payload.accumulatedText || payload.deltaText,
           );
           setProjectSupervisorRuntimeError('');
@@ -1879,13 +1913,13 @@ export function App({
         return;
       }
       if (payload.kind === 'text' && payload.text != null) {
-        setPlanningV2TransientReply(payload.text);
+        setPlanningV2TransientReplyTarget(payload.text);
       }
       if (payload.reasoningText != null) {
         setPlanningV2Reasoning(payload.reasoningText);
       }
       if (payload.kind === 'tool' && payload.text) {
-        setPlanningV2TransientReply(payload.text);
+        setPlanningV2TransientReplyTarget(payload.text);
       }
       if (payload.view) {
         applyDesignView(payload.view, payload.projectPath);
@@ -5916,7 +5950,7 @@ export function App({
     };
     setChatAgentBusy(true);
     setProjectSupervisorRuntimeError('');
-    setPlanningV2TransientReply('');
+    setPlanningV2TransientReplyTarget('');
     try {
       const result = currentSessionId
         ? await invoke<PlanningSessionCommandResultV2>(
@@ -5969,7 +6003,7 @@ export function App({
       ]);
     } finally {
       planningV2TurnRef.current = null;
-      setPlanningV2TransientReply('');
+      setPlanningV2TransientReplyTarget('');
       setChatAgentBusy(false);
     }
   }
@@ -11639,7 +11673,7 @@ export function App({
                   projectPath: nextProjectPath,
                   clientTurnId,
                 };
-                setPlanningV2TransientReply('');
+                setPlanningV2TransientReplyTarget('');
                 setChatAgentBusy(true);
                 setPlanGddDecisionBusy(true);
                 void invoke<DesignView>('decide_design_phase', {
@@ -11680,7 +11714,7 @@ export function App({
                       return;
                     }
                     designAgentTurnRef.current = null;
-                    setPlanningV2TransientReply('');
+                    setPlanningV2TransientReplyTarget('');
                     setChatAgentBusy(false);
                     setPlanGddDecisionBusy(false);
                   });