diff --git a/wwwroot/agent/index.ui b/wwwroot/agent/index.ui
index 6f06bb0..62c9559 100644
--- a/wwwroot/agent/index.ui
+++ b/wwwroot/agent/index.ui
@@ -8,7 +8,19 @@
             "subwidgets": [
                 {"widgettype": "Title2", "options": {"text": "智能助手"}},
                 {"widgettype": "Text", "options": {"text": "通用 AI 对话能力", "cfontsize": 0.9, "color": "#94a3b8"}},
-                {"widgettype": "Filler"}
+                {"widgettype": "Filler"},
+                {
+                    "widgettype": "Button",
+                    "id": "new_session_btn",
+                    "options": {"label": "＋ 新建会话", "css": "small"},
+                    "binds": [{
+                        "wid": "self",
+                        "event": "click",
+                        "actiontype": "script",
+                        "target": "self",
+                        "script": "var tp=bricks.getWidgetById('session_tabs',bricks.app);if(!tp)return;var sid='s'+Date.now()+'_'+Math.floor(Math.random()*100000);var n=tp.opts.items.length+1;tp.open_tab({name:'session_'+sid,label:'会话 '+n,removable:true,content:{widgettype:'AgentIO',options:{css:'filler',url:'/pipeline_core/api/agent_chat.dspy?session_id='+sid,model_dataurl:'/pipeline_core/api/agent_model_options.dspy',model_cwidth:14,placeholder:'输入你的需求...'}}});"
+                    }]
+                }
             ]
         },
         {
@@ -17,14 +29,30 @@
             "options": {"url": "{{entire_url('/pipeline_core/api/agent_menus.dspy')}}", "method": "GET"}
         },
         {
-            "widgettype": "AgentIO",
-            "id": "chat_io",
+            "widgettype": "TabPanel",
+            "id": "session_tabs",
             "options": {
                 "css": "filler",
-                "url": "/pipeline_core/api/agent_chat.dspy",
-                "model_dataurl": "/pipeline_core/api/agent_model_options.dspy",
-                "model_cwidth": 14,
-                "placeholder": "输入你的需求..."
+                "width": "100%",
+                "height": "100%",
+                "tab_pos": "top",
+                "items": [
+                    {
+                        "name": "session_default",
+                        "label": "会话 1",
+                        "removable": false,
+                        "content": {
+                            "widgettype": "AgentIO",
+                            "options": {
+                                "css": "filler",
+                                "url": "/pipeline_core/api/agent_chat.dspy?session_id=default",
+                                "model_dataurl": "/pipeline_core/api/agent_model_options.dspy",
+                                "model_cwidth": 14,
+                                "placeholder": "输入你的需求..."
+                            }
+                        }
+                    }
+                ]
             }
         }
     ]
diff --git a/wwwroot/api/agent_chat.dspy b/wwwroot/api/agent_chat.dspy
index 656702a..b0b0780 100644
--- a/wwwroot/api/agent_chat.dspy
+++ b/wwwroot/api/agent_chat.dspy
@@ -74,13 +74,16 @@ if action == 'send_message':
     if not uid:
         uid = 'user-01'  # 测试兼容
 
+    # ── 会话内唯一标识（web 多 tab 独立会话）：前端每个 tab 传独立 session_id ──
+    session_id = (params_kw or {}).get('session_id', '') or ''
+
     # ── 走 gateway 统一入口（Web AgentIO 通道）──
     from pipeline_service.gateway import get_gateway
     gateway = get_gateway()
 
     async def agent_stream():
         _base = entire_url("/")
-        async for chunk in gateway.run_message("web", uid, prompt, base_url=_base):
+        async for chunk in gateway.run_message("web", uid, prompt, base_url=_base, session_id=session_id):
             data = json.loads(chunk)
             t = data.get('type', '')