diff --git a/apps/ai-game-creator-shell/src/App.tsx b/apps/ai-game-creator-shell/src/App.tsx
index e8f3754a3..58526a3db 100644
--- a/apps/ai-game-creator-shell/src/App.tsx
+++ b/apps/ai-game-creator-shell/src/App.tsx
@@ -11946,6 +11946,7 @@ export function App({
               ? directCodexTransientReply
               : projectSupervisorTransientReply
         }
+        showDesignReasoning={planningV2Active}
         designReasoning={planningV2Reasoning}
         designReasoningEntries={
           useDesignAgentSurface ? (designAgentView?.reasoningEntries ?? []) : []
diff --git a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
index 36d6785c8..096a53a00 100644
--- a/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
+++ b/apps/ai-game-creator-shell/src/features/project-workspace/ProjectSupervisorView.tsx
@@ -100,6 +100,7 @@ type ProjectSupervisorViewProps = RuntimePanelProps & {
   projectPath: string;
   showProfessionalCollaboration?: boolean;
   transientReply: string;
+  showDesignReasoning?: boolean;
   designReasoning?: string;
   designReasoningEntries?: DesignReasoningEntry[];
   visibleMessages: ChatMessage[];
@@ -153,6 +154,7 @@ export function ProjectSupervisorView({
   projectPath,
   showProfessionalCollaboration = true,
   transientReply,
+  showDesignReasoning = false,
   designReasoning = '',
   designReasoningEntries = [],
   visibleMessages,
@@ -266,7 +268,7 @@ export function ProjectSupervisorView({
                 role={message.role}
                 text={projectSupervisorChatMessageText(message)}
               />
-              {message.reasoningText ? (
+              {showDesignReasoning && message.reasoningText ? (
                 <details
                   className="design-agent-reasoning"
                   aria-label="策划 Agent 思考过程"
@@ -277,19 +279,20 @@ export function ProjectSupervisorView({
               ) : null}
             </div>
           ))}
-          {designReasoningEntries
-            .filter((entry) => !entry.messageId)
-            .map((entry) => (
-              <details
-                key={`reasoning-${entry.id}`}
-                className="design-agent-reasoning"
-                aria-label="策划 Agent 思考过程"
-              >
-                <summary>思考过程</summary>
-                <pre>{entry.text}</pre>
-              </details>
-            ))}
-          {designReasoning ? (
+          {showDesignReasoning &&
+            designReasoningEntries
+              .filter((entry) => !entry.messageId)
+              .map((entry) => (
+                <details
+                  key={`reasoning-${entry.id}`}
+                  className="design-agent-reasoning"
+                  aria-label="策划 Agent 思考过程"
+                >
+                  <summary>思考过程</summary>
+                  <pre>{entry.text}</pre>
+                </details>
+              ))}
+          {showDesignReasoning && designReasoning ? (
             <details
               className="design-agent-reasoning"
               aria-label="策划 Agent 思考过程"