diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
index 1907ea4d3..0f6b61662 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
@@ -59,6 +59,8 @@ pub(crate) struct DesignEvent {
     kind: String,
     message_id: Option<String>,
     text: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    reasoning_text: Option<String>,
     view: Option<DesignView>,
 }
 
@@ -97,6 +99,7 @@ fn design_event(
         kind: kind.to_string(),
         message_id: id.map(str::to_string),
         text,
+        reasoning_text: None,
         view,
     }
 }
diff --git a/apps/ai-game-creator-shell/src/App.tsx b/apps/ai-game-creator-shell/src/App.tsx
index f404ddd84..e6d659cea 100644
--- a/apps/ai-game-creator-shell/src/App.tsx
+++ b/apps/ai-game-creator-shell/src/App.tsx
@@ -742,6 +742,7 @@ export function App({
   );
   planningV2SessionRef.current = planningV2Session;
   const [planningV2TransientReply, setPlanningV2TransientReply] = useState('');
+  const [planningV2Reasoning, setPlanningV2Reasoning] = useState('');
   const planningV2TurnRef = useRef<{
     projectPath: string;
     clientTurnId: string;
@@ -1915,6 +1916,9 @@ export function App({
       if (payload.kind === 'text' && payload.text != null) {
         setPlanningV2TransientReply(payload.text);
       }
+      if (payload.reasoningText != null) {
+        setPlanningV2Reasoning(payload.reasoningText);
+      }
       if (payload.kind === 'tool' && payload.text) {
         setPlanningV2TransientReply(payload.text);
       }
@@ -11641,6 +11645,7 @@ export function App({
               ? directCodexTransientReply
               : projectSupervisorTransientReply
         }
+        designReasoning={planningV2Reasoning}
         visibleMessages={visibleMessages}
         visibleProfessionalAgentCards={visibleProfessionalAgentCards}
         showProfessionalCollaboration={
diff --git a/apps/ai-game-creator-shell/src/app/types.ts b/apps/ai-game-creator-shell/src/app/types.ts
index 81b84b326..cf57ba3a4 100644
--- a/apps/ai-game-creator-shell/src/app/types.ts
+++ b/apps/ai-game-creator-shell/src/app/types.ts
@@ -993,6 +993,7 @@ export interface DesignEvent {
   kind: string;
   messageId?: string | null;
   text?: string | null;
+  reasoningText?: string | null;
   view?: DesignView | null;
 }
 
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 17499d5a9..10a3c515c 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
@@ -90,6 +90,7 @@ type ProjectSupervisorViewProps = RuntimePanelProps & {
   projectPath: string;
   showProfessionalCollaboration?: boolean;
   transientReply: string;
+  designReasoning?: string;
   visibleMessages: ChatMessage[];
   visibleProfessionalAgentCards: AgentStatusCard[];
   workspaceStatus: string;
@@ -142,6 +143,7 @@ export function ProjectSupervisorView({
   projectPath,
   showProfessionalCollaboration = true,
   transientReply,
+  designReasoning = '',
   visibleMessages,
   visibleProfessionalAgentCards,
   workspaceStatus,
@@ -245,6 +247,12 @@ export function ProjectSupervisorView({
               />
             </div>
           ))}
+          {designReasoning ? (
+            <details className="design-agent-reasoning">
+              <summary>显示思考过程</summary>
+              <pre>{designReasoning}</pre>
+            </details>
+          ) : null}
           {directCodex &&
           (runtimePanelProps.controlBusy || Boolean(directProcessDetail)) ? (
             <section
diff --git a/apps/ai-game-creator-shell/src/styles.css b/apps/ai-game-creator-shell/src/styles.css
index 0d6577870..16d1e0e0f 100644
--- a/apps/ai-game-creator-shell/src/styles.css
+++ b/apps/ai-game-creator-shell/src/styles.css
@@ -9149,3 +9149,15 @@ button.design-workspace-tree__entry:hover,
   background: #fff;
   font-size: 12px;
 }
+.design-agent-reasoning {
+  margin: 8px 0;
+  color: var(--text-muted);
+  font-size: 0.82em;
+}
+.design-agent-reasoning summary { cursor: pointer; }
+.design-agent-reasoning pre {
+  margin: 6px 0 0;
+  white-space: pre-wrap;
+  font: inherit;
+  opacity: 0.8;
+}
diff --git a/docs/technical/【技术方案】策划Agent生产迁移与工作区浏览-2026-09-10.md b/docs/technical/【技术方案】策划Agent生产迁移与工作区浏览-2026-09-10.md
index 8cb5b54eb..c726c04fc 100644
--- a/docs/technical/【技术方案】策划Agent生产迁移与工作区浏览-2026-09-10.md
+++ b/docs/technical/【技术方案】策划Agent生产迁移与工作区浏览-2026-09-10.md
@@ -339,3 +339,9 @@ UI 使用“批准”和“继续修改”两个文字按钮，分别配 Lucide
 - 多个策划身份提示词同时存在；
 - 多 Agent 协作；
 - 旧 Fast GDD 展示和 GDD schema 兼容。
+
+## 14. 策划 Agent reasoning 展示现状
+
+右侧栏已预留策划 Agent 的 `reasoningText` 事件字段和默认折叠的展示样式，但当前 Provider 解析链仍会过滤 reasoning 内容，尚未向策划 Runtime 产出该字段。因此现阶段只展示用户可见正文和工具状态；reasoning 折叠区在没有数据时不会出现。
+
+后续若补充 reasoning，需要在策划 Agent 专用 Provider 解析层接入，不能直接修改共享 Provider 以免影响 GameAgent。