diff --git a/wwwroot/index.ui b/wwwroot/index.ui
index 60a3464..1f8f296 100644
--- a/wwwroot/index.ui
+++ b/wwwroot/index.ui
@@ -33,6 +33,30 @@
                 {
                     "widgettype": "Filler"
                 },
+                {
+                    "widgettype": "Form",
+                    "id": "model_selector",
+                    "options": {
+                        "name": "model_selector",
+                        "cols": 1,
+                        "fields": [
+                            {
+                                "name": "model_id",
+                                "uitype": "code",
+                                "label": "",
+                                "placeholder": "\u9009\u62e9\u6a21\u578b",
+                                "cwidth": 12,
+                                "dataurl": "/pipeline-sdlc/api/cockpit_model_options.dspy",
+                                "valueField": "model_id",
+                                "textField": "model_id_text",
+                                "params": {
+                                    "valueField": "model_id",
+                                    "textField": "model_id_text"
+                                }
+                            }
+                        ]
+                    }
+                },
                 {
                     "widgettype": "Button",
                     "options": {
@@ -139,7 +163,7 @@
                             "event": "inputed",
                             "actiontype": "script",
                             "target": "self",
-                            "script": "var p=params.prompt;var files=params.add_files||[];var iid='';try{var iter=bricks.getWidgetById('current_iteration_id',bricks.app);if(iter)iid=iter.options.value||'';}catch(e){}var chat=bricks.getWidgetById('chat_scroll',bricks.app);var at=null;if(chat){var ub=new bricks.HBox({width:'100%'});var um=new bricks.VBox({width:'85%',alignSelf:'flex-end',bgcolor:'#dbeafe',borderRadius:'12px',padding:'12px 16px',marginBottom:'10px',gap:'4px'});um.add_widget(new bricks.Text({text:'\\u4f60',cfontsize:0.75,color:'#2563eb',fontWeight:'bold'}));um.add_widget(new bricks.Text({text:p,cfontsize:0.95,color:'#1e293b',whiteSpace:'pre-wrap'}));ub.add_widget(new bricks.VBox({css:'filler'}));ub.add_widget(um);ub.add_widget(new bricks.Svg({rate:2,url:bricks_resource('imgs/chat-user.svg')}));chat.add_widget(ub);var ab=new bricks.HBox({width:'100%'});var am=new bricks.VBox({width:'85%',alignSelf:'flex-start',bgcolor:'#e8f0fe',borderRadius:'12px',padding:'12px 16px',marginBottom:'10px',gap:'4px'});am.add_widget(new bricks.Text({text:'Agent',cfontsize:0.75,color:'#3b82f6',fontWeight:'bold'}));at=new bricks.Text({text:'\\u6b63\\u5728\\u5206\\u6790\\u9700\\u6c42...',cfontsize:0.85,color:'#64748b'});am.add_widget(at);ab.add_widget(new bricks.Svg({rate:2,url:bricks_resource('imgs/llm.svg')}));ab.add_widget(am);ab.add_widget(new bricks.VBox({css:'filler'}));chat.add_widget(ab);}var body='message_text='+encodeURIComponent(p)+'&iteration_id='+encodeURIComponent(iid)+'&action=send_message&file_paths='+encodeURIComponent(JSON.stringify(files.map(function(f){return f.name||f})));fetch('/pipeline-sdlc/api/cockpit_chat.dspy',{method:'POST',headers:{'Content-Type':'application/x-www-form-urlencoded'},body:body}).then(function(r){return r.json()}).then(function(r){if(r.success){if(at)at.set_text(r.agent_reply||'\\u5df2\\u5904\\u7406');var s=bricks.getWidgetById('stats_row',bricks.app);if(s)s.render({});}else{if(at)at.set_text('\\u9519\\u8bef: '+(r.error||'\\u672a\\u77e5\\u9519\\u8bef'));}});"
+                            "script": "var p=params.prompt;var files=params.add_files||[];var iid='';try{var iter=bricks.getWidgetById('current_iteration_id',bricks.app);if(iter)iid=iter.options.value||'';}catch(e){}var mid='';try{var ms=bricks.getWidgetById('model_selector',bricks.app);if(ms){var f=ms.form_element;if(f)mid=f.querySelector('[name=model_id]').value||'';}}catch(e){}var chat=bricks.getWidgetById('chat_scroll',bricks.app);var at=null;if(chat){var ub=new bricks.HBox({width:'100%'});var um=new bricks.VBox({width:'85%',alignSelf:'flex-end',bgcolor:'#dbeafe',borderRadius:'12px',padding:'12px 16px',marginBottom:'10px',gap:'4px'});um.add_widget(new bricks.Text({text:'\\u4f60',cfontsize:0.75,color:'#2563eb',fontWeight:'bold'}));um.add_widget(new bricks.Text({text:p,cfontsize:0.95,color:'#1e293b',whiteSpace:'pre-wrap'}));ub.add_widget(new bricks.VBox({css:'filler'}));ub.add_widget(um);ub.add_widget(new bricks.Svg({rate:2,url:bricks_resource('imgs/chat-user.svg')}));chat.add_widget(ub);var ab=new bricks.HBox({width:'100%'});var am=new bricks.VBox({width:'85%',alignSelf:'flex-start',bgcolor:'#e8f0fe',borderRadius:'12px',padding:'12px 16px',marginBottom:'10px',gap:'4px'});am.add_widget(new bricks.Text({text:'Agent',cfontsize:0.75,color:'#3b82f6',fontWeight:'bold'}));at=new bricks.Text({text:'\\u6b63\\u5728\\u5206\\u6790\\u9700\\u6c42...',cfontsize:0.85,color:'#64748b'});am.add_widget(at);ab.add_widget(new bricks.Svg({rate:2,url:bricks_resource('imgs/llm.svg')}));ab.add_widget(am);ab.add_widget(new bricks.VBox({css:'filler'}));chat.add_widget(ab);}var body='message_text='+encodeURIComponent(p)+'&iteration_id='+encodeURIComponent(iid)+'&model_id='+encodeURIComponent(mid)+'&action=send_message&file_paths='+encodeURIComponent(JSON.stringify(files.map(function(f){return f.name||f})));fetch('/pipeline-sdlc/api/cockpit_chat.dspy',{method:'POST',headers:{'Content-Type':'application/x-www-form-urlencoded'},body:body}).then(function(r){return r.json()}).then(function(r){if(r.success){if(at)at.set_text(r.agent_reply||'\\u5df2\\u5904\\u7406');var s=bricks.getWidgetById('stats_row',bricks.app);if(s)s.render({});}else{if(at)at.set_text('\\u9519\\u8bef: '+(r.error||'\\u672a\\u77e5\\u9519\\u8bef'));}});"
                         }
                     ]
                 }