diff --git a/frontend/.windsurfrules/global_rules.md b/frontend/.windsurfrules
similarity index 100%
rename from frontend/.windsurfrules/global_rules.md
rename to frontend/.windsurfrules
diff --git a/frontend/packages/core/src/pages/playground/index.tsx b/frontend/packages/core/src/pages/playground/index.tsx
index 8d902c26..1fe7cc70 100644
--- a/frontend/packages/core/src/pages/playground/index.tsx
+++ b/frontend/packages/core/src/pages/playground/index.tsx
@@ -1,46 +1,147 @@
+'use client'
+
+import { Icon } from '@iconify/react'
 import type { Edge, Node } from '@xyflow/react'
-import { addEdge, Background, Controls, MiniMap, ReactFlow, useEdgesState, useNodesState } from '@xyflow/react'
+import { addEdge, Background, Controls, ReactFlow, useEdgesState, useNodesState } from '@xyflow/react'
 import '@xyflow/react/dist/style.css'
 import React, { useCallback } from 'react'
+import './styles.css'
+
+interface ModelCardProps {
+  title: string
+  status: 'success' | 'failure'
+  defaultModel: string
+  onSettingClick?: () => void
+}
+
+const ModelCard: React.FC<ModelCardProps> = ({ title, status, defaultModel, onSettingClick }) => (
+  <div className="bg-white rounded-lg shadow-sm p-4 w-[280px] border border-[#ededed]">
+    <div className="flex justify-between items-center mb-3">
+      <div className="flex gap-2 items-center">
+        <Icon icon="mdi:robot" className="text-xl text-[--primary-color]" />
+        <span className="font-medium text-gray-800">{title}</span>
+      </div>
+      <div className="flex gap-2 items-center">
+        <span
+          className={`w-2 h-2 rounded-full ${status === 'success' ? 'bg-green-500' : 'bg-red-500'}`}
+          title={status === 'success' ? 'Connected' : 'Disconnected'}
+        />
+        <Icon
+          icon="mdi:cog"
+          className="text-xl text-gray-400 cursor-pointer hover:text-[--primary-color]"
+          onClick={onSettingClick}
+        />
+      </div>
+    </div>
+    <div className="text-sm text-gray-500">{defaultModel}</div>
+  </div>
+)
+
+interface KeyStatusCardProps {
+  keys: Array<'success' | 'failure'>
+  title: string
+}
+
+const KeyStatusCard: React.FC<KeyStatusCardProps> = ({ keys, title }) => (
+  <div className="bg-white rounded-lg shadow-sm p-4 w-[280px] border border-[#ededed]">
+    <div className="flex items-center mb-3">
+      <span className="text-sm font-medium text-gray-700">{title}</span>
+    </div>
+    <div className="grid grid-cols-4 gap-2">
+      {keys.map((status, index) => (
+        <div
+          key={index}
+          className={`aspect-square rounded-md ${status === 'success' ? 'bg-green-500' : 'bg-red-500'}`}
+          title={status === 'success' ? 'Active' : 'Inactive'}
+        />
+      ))}
+    </div>
+  </div>
+)
+
+const ServiceCard: React.FC = () => (
+  <div className="bg-white rounded-lg shadow-sm p-4 w-[200px] border border-[#ededed]">
+    <div className="flex flex-col gap-3 items-center">
+      <Icon icon="mdi:robot" className="text-3xl text-[--primary-color]" />
+      <span className="font-medium text-gray-800">AI Service</span>
+    </div>
+  </div>
+)
 
 const initialNodes: Node[] = [
   {
-    id: '1',
-    position: { x: 100, y: 100 },
-    data: { label: 'Node 1' },
-    type: 'input'
+    id: 'service',
+    type: 'custom',
+    position: { x: 50, y: 100 },
+    data: { component: <ServiceCard /> }
   },
   {
-    id: '2',
-    position: { x: 100, y: 200 },
-    data: { label: 'Node 2' }
+    id: 'openai',
+    type: 'custom',
+    position: { x: 400, y: 50 },
+    data: {
+      component: <ModelCard title="OpenAI" status="success" defaultModel="gpt-4" />
+    }
   },
   {
-    id: '3',
-    position: { x: 100, y: 300 },
-    data: { label: 'Node 3' },
-    type: 'output'
+    id: 'anthropic',
+    type: 'custom',
+    position: { x: 400, y: 200 },
+    data: {
+      component: <ModelCard title="Anthropic" status="success" defaultModel="claude-2" />
+    }
+  },
+  {
+    id: 'gemini',
+    type: 'custom',
+    position: { x: 400, y: 350 },
+    data: {
+      component: <ModelCard title="Google Gemini" status="failure" defaultModel="gemini-pro" />
+    }
+  },
+  {
+    id: 'openai-keys',
+    type: 'custom',
+    position: { x: 750, y: 50 },
+    data: {
+      component: <KeyStatusCard title="API Keys" keys={['success', 'success', 'failure', 'success']} />
+    }
+  },
+  {
+    id: 'anthropic-keys',
+    type: 'custom',
+    position: { x: 750, y: 200 },
+    data: {
+      component: <KeyStatusCard title="API Keys" keys={['success', 'success', 'success']} />
+    }
+  },
+  {
+    id: 'gemini-keys',
+    type: 'custom',
+    position: { x: 750, y: 350 },
+    data: {
+      component: <KeyStatusCard title="API Keys" keys={['failure', 'failure']} />
+    }
   }
 ]
 
 const initialEdges: Edge[] = [
-  { id: 'e1-2', source: '1', target: '2' },
-  { id: 'e2-3', source: '2', target: '3' }
+  { id: 'service-openai', source: 'service', target: 'openai', animated: true, label: 'Connected' },
+  { id: 'service-anthropic', source: 'service', target: 'anthropic', animated: true, label: 'Connected' },
+  { id: 'service-gemini', source: 'service', target: 'gemini', animated: true, label: 'Disconnected' },
+  { id: 'openai-keys', source: 'openai', target: 'openai-keys', animated: true },
+  { id: 'anthropic-keys', source: 'anthropic', target: 'anthropic-keys', animated: true },
+  { id: 'gemini-keys', source: 'gemini', target: 'gemini-keys', animated: true }
 ]
 
 const Playground: React.FC = () => {
   const [nodes, setNodes, onNodesChange] = useNodesState(initialNodes)
   const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges)
 
-  const onConnect = useCallback(
-    (params: any) => {
-      setEdges((eds) => addEdge(params, eds))
-    },
-    [setEdges]
-  )
+  const onConnect = useCallback((params: any) => setEdges((eds) => addEdge(params, eds)), [setEdges])
 
   return (
-    <div style={{ width: '100%', height: '600px' }}>
+    <div className="w-full h-screen bg-gray-50">
       <ReactFlow
         nodes={nodes}
         edges={edges}
@@ -51,7 +152,6 @@ const Playground: React.FC = () => {
       >
         <Background />
         <Controls />
-        <MiniMap />
       </ReactFlow>
     </div>
   )
diff --git a/frontend/packages/core/src/pages/playground/styles.css b/frontend/packages/core/src/pages/playground/styles.css
new file mode 100644
index 00000000..b482a35e
--- /dev/null
+++ b/frontend/packages/core/src/pages/playground/styles.css
@@ -0,0 +1,91 @@
+/* Flow Chart Styles */
+.react-flow__node {
+  padding: 0;
+  border-radius: 8px;
+  min-width: 150px;
+}
+
+.react-flow__edge-path {
+  stroke: var(--primary-color);
+  stroke-width: 2;
+}
+
+.react-flow__edge-text {
+  font-size: 12px;
+  fill: #666;
+}
+
+.react-flow__controls {
+  box-shadow: 0 0 2px rgba(0, 0, 0, 0.1);
+  border: 1px solid #ededed;
+}
+
+.react-flow__controls-button {
+  border: none;
+  background: white;
+  border-bottom: 1px solid #ededed;
+  box-sizing: content-box;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: 16px;
+  height: 16px;
+  cursor: pointer;
+  user-select: none;
+  padding: 5px;
+}
+
+.react-flow__controls-button:hover {
+  background: #f8f8f8;
+}
+
+/* Custom Node Styles */
+.custom-node {
+  background: white;
+  border: 1px solid #ededed;
+  border-radius: 8px;
+  padding: 10px;
+  width: 280px;
+}
+
+.custom-node:hover {
+  box-shadow: 0 0 0 1px var(--primary-color);
+}
+
+/* API Key Status Grid */
+.api-key-grid {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 8px;
+}
+
+.api-key-status {
+  aspect-ratio: 1;
+  border-radius: 4px;
+  transition: all 0.2s ease;
+}
+
+.api-key-status:hover {
+  transform: scale(1.05);
+}
+
+/* Responsive Breakpoints */
+@media (max-width: 768px) {
+  .custom-node {
+    width: 240px;
+  }
+
+  .api-key-grid {
+    grid-template-columns: repeat(3, 1fr);
+  }
+}
+
+@media (max-width: 576px) {
+  .custom-node {
+    width: 200px;
+  }
+
+  .api-key-grid {
+    grid-template-columns: repeat(2, 1fr);
+  }
+}