diff --git a/src/Layout.tsx b/src/Layout.tsx
index ad24c11..053926e 100644
--- a/src/Layout.tsx
+++ b/src/Layout.tsx
@@ -19,7 +19,15 @@ export default function Layout() {
   }, [pathname]);
 
   return (
-    <div className="bg-[#f7f7f9] flex h-screen w-screen overflow-hidden text-txt font-sans">
+    <div className="bg-[#f7f7f9] flex h-screen w-screen overflow-hidden text-txt font-sans relative">
+      {/* Demo Badge */}
+      <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 pointer-events-none z-50 select-none opacity-[0.08] flex flex-col items-center">
+        <div className="border-[8px] border-magenta px-10 py-4 transform -rotate-12 flex flex-col items-center">
+            <span className="text-8xl font-black text-magenta tracking-widest">DEMO ONLY</span>
+            <span className="text-3xl font-bold text-magenta mt-2">TECHNICAL SHARING 2026</span>
+        </div>
+      </div>
+      
       {/* 侧边栏导航 */}
       <aside className="w-64 bg-white border-r border-border flex flex-col z-10 shrink-0">
         <div className="h-16 flex items-center px-6 border-b border-border">
@@ -102,6 +110,12 @@ export default function Layout() {
             </p>
           </div>
         </div>
+
+        {/* Sidebar Demo Badge */}
+        <div className="mx-4 my-4 p-3 border-2 border-dashed border-magenta/20 rounded-xl flex flex-col items-center justify-center text-center bg-magenta/5 rotate-1">
+          <p className="text-[10px] font-black text-magenta uppercase tracking-tighter opacity-70">Tech Sharing</p>
+          <p className="text-[13px] font-black text-magenta -mt-1 uppercase tracking-[0.1em] italic">DEMO ONLY</p>
+        </div>
       </aside>
 
       {/* 主内容区 */}
diff --git a/src/pages/PlanningAgent.tsx b/src/pages/PlanningAgent.tsx
index ac0f8b1..9a9d7d1 100644
--- a/src/pages/PlanningAgent.tsx
+++ b/src/pages/PlanningAgent.tsx
@@ -14,10 +14,25 @@ type ChatMessage = {
 };
 
 type StreamEvent = {
-  type: "thought" | "tool_call" | "tool_result" | "final" | "error";
+  type: "thought" | "tool_call" | "tool_result" | "final" | "error" | "workspace_start" | "workspace_delta" | "workspace_end";
   content: string;
   step?: number;
   tool_name?: string;
+  workspace_title?: string;
+};
+
+type WorkspaceState = {
+  isOpen: boolean;
+  title: string;
+  content: string;
+  isGenerating: boolean;
+};
+
+const WORKSPACE_INIT: WorkspaceState = {
+  isOpen: false,
+  title: "",
+  content: "",
+  isGenerating: false,
 };
 
 type HistorySession = {
@@ -34,6 +49,7 @@ type State = {
   reasoning: Record<string, string>; // Map message ID to its reasoning/traces
   chatting: boolean;
   historySessions: HistorySession[];
+  workspace: WorkspaceState;
   error?: string;
 };
 
@@ -45,7 +61,11 @@ type Action =
   | { type: "set-error"; v?: string }
   | { type: "set-history"; sessions: HistorySession[] }
   | { type: "load-session"; sessionId: string; messages: ChatMessage[] }
-  | { type: "reset"; sessionId: string; userId: string };
+  | { type: "reset"; sessionId: string; userId: string }
+  | { type: "ws-start"; title: string }
+  | { type: "ws-delta"; content: string }
+  | { type: "ws-end" }
+  | { type: "ws-toggle"; open: boolean };
 
 /* ─── Helpers ─── */
 function uid() {
@@ -129,9 +149,30 @@ function reducer(state: State, action: Action): State {
         reasoning: {},
         chatting: false,
         historySessions: state.historySessions,
+        workspace: WORKSPACE_INIT,
         error: undefined,
       };
     }
+    case "ws-start":
+      return {
+        ...state,
+        workspace: { isOpen: true, title: action.title || "New Artifact", content: "", isGenerating: true },
+      };
+    case "ws-delta":
+      return {
+        ...state,
+        workspace: { ...state.workspace, content: state.workspace.content + action.content },
+      };
+    case "ws-end":
+      return {
+        ...state,
+        workspace: { ...state.workspace, isGenerating: false },
+      };
+    case "ws-toggle":
+      return {
+        ...state,
+        workspace: { ...state.workspace, isOpen: action.open },
+      };
     default:
       return state;
   }
@@ -212,6 +253,7 @@ export default function PlanningAgent() {
     reasoning: {},
     chatting: false,
     historySessions: getStoredHistory(),
+    workspace: WORKSPACE_INIT,
   });
 
   const [input, setInput] = useState("");
@@ -285,7 +327,13 @@ export default function PlanningAgent() {
           file_ids: files.map((f) => f.id),
         },
         (evt) => {
-          if (evt.type === "final") {
+          if (evt.type === "workspace_start") {
+            dispatch({ type: "ws-start", title: evt.workspace_title || "New Artifact" });
+          } else if (evt.type === "workspace_delta") {
+            dispatch({ type: "ws-delta", content: evt.content });
+          } else if (evt.type === "workspace_end") {
+            dispatch({ type: "ws-end" });
+          } else if (evt.type === "final") {
             finalText += evt.content;
             dispatch({
               type: "update-msg",
@@ -367,8 +415,10 @@ export default function PlanningAgent() {
     setFiles([]);
   };
 
+  const wsHasContent = !state.workspace.isOpen && state.workspace.content.length > 0;
+
   return (
-    <div className="h-full relative overflow-hidden">
+    <div className="h-full relative overflow-hidden flex">
       {/* ─── Sidebar Overlay ─── */}
       {isHistoryOpen && (
         <div 
@@ -434,8 +484,12 @@ export default function PlanningAgent() {
       </div>
 
       {/* ─── Main Chat ─── */}
-      <div className="h-full flex flex-col min-w-0">
-        <div className="flex-1 overflow-y-auto px-[72px] py-8">
+      <div className={`h-full flex flex-col min-w-0 transition-all duration-300 ease-in-out ${
+        state.workspace.isOpen ? 'w-[35%] border-r border-border' : 'w-full'
+      }`}>
+        <div className={`flex-1 overflow-y-auto py-8 ${
+          state.workspace.isOpen ? 'px-4' : 'px-[72px]'
+        }`}>
           {/* History Toggle Button */}
           <button
             onClick={() => setIsHistoryOpen(true)}
@@ -450,7 +504,7 @@ export default function PlanningAgent() {
           <div className="flex flex-col gap-6 w-full">
             {state.messages.length === 0 && (
               <div className="text-center py-20 card">
-                <h2 className="text-2xl font-extrabold mb-2">规划委员会代理</h2>
+                <h2 className={`font-extrabold mb-2 ${state.workspace.isOpen ? 'text-lg' : 'text-2xl'}`}>规划委员会代理</h2>
                 <p className="text-txt-muted text-sm">
                   提供一个高层 Epic，代理将从产品、架构与 RTE 视角进行规划。
                 </p>
@@ -460,7 +514,7 @@ export default function PlanningAgent() {
             {state.messages.map((msg) => (
               <div
                 key={msg.id}
-                className={`max-w-[78%] px-6 py-5 text-[0.95rem] leading-relaxed rounded-2xl shadow-[0_2px_14px_rgba(0,0,0,0.04)] ${
+                className={`${state.workspace.isOpen ? 'max-w-full' : 'max-w-[78%]'} px-6 py-5 text-[0.95rem] leading-relaxed rounded-2xl shadow-[0_2px_14px_rgba(0,0,0,0.04)] ${
                   msg.role === "user"
                     ? "self-end mr-1 bg-surface-muted text-txt border border-border whitespace-pre-wrap"
                     : "self-start bg-white border border-border border-l-4 border-l-magenta"
@@ -504,9 +558,24 @@ export default function PlanningAgent() {
           </div>
         </div>
 
+        {/* Workspace recall button */}
+        {wsHasContent && (
+          <div className={`${state.workspace.isOpen ? 'mx-4' : 'mx-[72px]'} mb-2`}>
+            <button
+              onClick={() => dispatch({ type: "ws-toggle", open: true })}
+              className="flex items-center gap-2 px-4 py-2 bg-magenta/5 border border-magenta/30 rounded-xl text-sm text-magenta hover:bg-magenta/10 transition-colors w-full justify-center"
+            >
+              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+              </svg>
+              查看文档输出 — {state.workspace.title}
+            </button>
+          </div>
+        )}
+
         {/* Error */}
         {state.error && (
-          <div className="mx-[72px] mb-2 px-4 py-2 bg-red-50 text-red-700 text-sm flex justify-between items-center">
+          <div className={`${state.workspace.isOpen ? 'mx-4' : 'mx-[72px]'} mb-2 px-4 py-2 bg-red-50 text-red-700 text-sm flex justify-between items-center`}>
             {state.error}
             <button
               className="text-red-400 hover:text-red-600 font-bold"
@@ -518,7 +587,7 @@ export default function PlanningAgent() {
         )}
 
         {/* Input area */}
-        <div className="px-10 pb-6 pt-4 border-t border-border">
+        <div className={`pb-6 pt-4 border-t border-border ${state.workspace.isOpen ? 'px-4' : 'px-10'}`}>
           {/* File upload row */}
           <div className="flex items-center gap-3 mb-3 text-sm">
             <label className="btn-outline text-xs px-3 py-1.5 cursor-pointer">
@@ -556,6 +625,49 @@ export default function PlanningAgent() {
           </div>
         </div>
       </div>
+
+      {/* ─── Right Panel: Workspace ─── */}
+      {state.workspace.isOpen && (
+        <div className="w-[65%] h-full flex flex-col bg-white border-l border-border">
+          {/* Workspace Header */}
+          <div className="h-14 border-b border-border flex items-center px-6 justify-between bg-white shrink-0">
+            <h3 className="font-semibold text-txt flex items-center gap-2 truncate">
+              <svg className="w-5 h-5 text-magenta shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+              </svg>
+              {state.workspace.title}
+              {state.workspace.isGenerating && (
+                <span className="text-sm text-magenta animate-pulse flex items-center gap-1 ml-2">
+                  <span className="w-1.5 h-1.5 rounded-full bg-magenta animate-pulse" />
+                  生成中...
+                </span>
+              )}
+            </h3>
+            <button
+              onClick={() => dispatch({ type: "ws-toggle", open: false })}
+              className="p-2 hover:bg-surface-muted rounded-full transition-colors shrink-0"
+              title="关闭面板"
+            >
+              <svg className="w-5 h-5 text-txt-muted hover:text-txt" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          {/* Workspace Content */}
+          <div className="flex-1 overflow-y-auto p-8">
+            <div className="prose prose-sm max-w-none prose-p:my-1 prose-pre:bg-gray-800 prose-pre:text-gray-100 prose-code:text-magenta prose-code:bg-magenta/10 prose-code:px-1 prose-code:rounded prose-li:my-0 prose-headings:text-txt">
+              <ReactMarkdown remarkPlugins={[remarkGfm]} rehypePlugins={[rehypeRaw]}>
+                {state.workspace.content}
+              </ReactMarkdown>
+            </div>
+            {state.workspace.isGenerating && !state.workspace.content && (
+              <div className="flex items-center justify-center py-20 text-txt-muted">
+                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-magenta" />
+              </div>
+            )}
+          </div>
+        </div>
+      )}
     </div>
   );
 }