v0

16 files changed, 1099 insertions, 0 deletions

diff --git a/frontend/src/App.css b/frontend/src/App.css
new file mode 100644
index 0000000..6863cd4
--- /dev/null
+++ b/frontend/src/App.css
@@ -0,0 +1,15 @@
+* {
+  box-sizing: border-box;
+}
+
+.app {
+  display: flex;
+  height: 100vh;
+  width: 100vw;
+  overflow: hidden;
+  background: #ffffff;
+  color: #333;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+}
diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
new file mode 100644
index 0000000..0396e3a
--- /dev/null
+++ b/frontend/src/App.jsx
@@ -0,0 +1,120 @@
+import { useState, useEffect } from 'react';
+import Sidebar from './components/Sidebar';
+import ChatInterface from './components/ChatInterface';
+import { api } from './api';
+import './App.css';
+
+function App() {
+  const [conversations, setConversations] = useState([]);
+  const [currentConversationId, setCurrentConversationId] = useState(null);
+  const [currentConversation, setCurrentConversation] = useState(null);
+  const [isLoading, setIsLoading] = useState(false);
+
+  // Load conversations on mount
+  useEffect(() => {
+    loadConversations();
+  }, []);
+
+  // Load conversation details when selected
+  useEffect(() => {
+    if (currentConversationId) {
+      loadConversation(currentConversationId);
+    }
+  }, [currentConversationId]);
+
+  const loadConversations = async () => {
+    try {
+      const convs = await api.listConversations();
+      setConversations(convs);
+    } catch (error) {
+      console.error('Failed to load conversations:', error);
+    }
+  };
+
+  const loadConversation = async (id) => {
+    try {
+      const conv = await api.getConversation(id);
+      setCurrentConversation(conv);
+    } catch (error) {
+      console.error('Failed to load conversation:', error);
+    }
+  };
+
+  const handleNewConversation = async () => {
+    try {
+      const newConv = await api.createConversation();
+      setConversations([
+        { id: newConv.id, created_at: newConv.created_at, message_count: 0 },
+        ...conversations,
+      ]);
+      setCurrentConversationId(newConv.id);
+    } catch (error) {
+      console.error('Failed to create conversation:', error);
+    }
+  };
+
+  const handleSelectConversation = (id) => {
+    setCurrentConversationId(id);
+  };
+
+  const handleSendMessage = async (content) => {
+    if (!currentConversationId) return;
+
+    setIsLoading(true);
+    try {
+      // Optimistically add user message to UI
+      const userMessage = { role: 'user', content };
+      setCurrentConversation((prev) => ({
+        ...prev,
+        messages: [...prev.messages, userMessage],
+      }));
+
+      // Send message and get council response
+      const response = await api.sendMessage(currentConversationId, content);
+
+      // Add assistant message to UI
+      const assistantMessage = {
+        role: 'assistant',
+        stage1: response.stage1,
+        stage2: response.stage2,
+        stage3: response.stage3,
+        metadata: response.metadata,
+      };
+
+      setCurrentConversation((prev) => ({
+        ...prev,
+        messages: [...prev.messages, assistantMessage],
+      }));
+
+      // Reload conversations list to update message count
+      await loadConversations();
+    } catch (error) {
+      console.error('Failed to send message:', error);
+      // Remove optimistic user message on error
+      setCurrentConversation((prev) => ({
+        ...prev,
+        messages: prev.messages.slice(0, -1),
+      }));
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <div className="app">
+      <Sidebar
+        conversations={conversations}
+        currentConversationId={currentConversationId}
+        onSelectConversation={handleSelectConversation}
+        onNewConversation={handleNewConversation}
+      />
+      <ChatInterface
+        conversation={currentConversation}
+        onSendMessage={handleSendMessage}
+        isLoading={isLoading}
+      />
+    </div>
+  );
+}
+
+export default App;
diff --git a/frontend/src/api.js b/frontend/src/api.js
new file mode 100644
index 0000000..479f0ef
--- /dev/null
+++ b/frontend/src/api.js
@@ -0,0 +1,68 @@
+/**
+ * API client for the LLM Council backend.
+ */
+
+const API_BASE = 'http://localhost:8001';
+
+export const api = {
+  /**
+   * List all conversations.
+   */
+  async listConversations() {
+    const response = await fetch(`${API_BASE}/api/conversations`);
+    if (!response.ok) {
+      throw new Error('Failed to list conversations');
+    }
+    return response.json();
+  },
+
+  /**
+   * Create a new conversation.
+   */
+  async createConversation() {
+    const response = await fetch(`${API_BASE}/api/conversations`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({}),
+    });
+    if (!response.ok) {
+      throw new Error('Failed to create conversation');
+    }
+    return response.json();
+  },
+
+  /**
+   * Get a specific conversation.
+   */
+  async getConversation(conversationId) {
+    const response = await fetch(
+      `${API_BASE}/api/conversations/${conversationId}`
+    );
+    if (!response.ok) {
+      throw new Error('Failed to get conversation');
+    }
+    return response.json();
+  },
+
+  /**
+   * Send a message in a conversation.
+   */
+  async sendMessage(conversationId, content) {
+    const response = await fetch(
+      `${API_BASE}/api/conversations/${conversationId}/message`,
+      {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ content }),
+      }
+    );
+    if (!response.ok) {
+      throw new Error('Failed to send message');
+    }
+    return response.json();
+  },
+};
diff --git a/frontend/src/assets/react.svg b/frontend/src/assets/react.svg
new file mode 100644
index 0000000..6c87de9
--- /dev/null
+++ b/frontend/src/assets/react.svg
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/frontend/src/components/ChatInterface.css b/frontend/src/components/ChatInterface.css
new file mode 100644
index 0000000..531d2a3
--- /dev/null
+++ b/frontend/src/components/ChatInterface.css
@@ -0,0 +1,149 @@
+.chat-interface {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  background: #ffffff;
+}
+
+.messages-container {
+  flex: 1;
+  overflow-y: auto;
+  padding: 24px;
+}
+
+.empty-state {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  color: #666;
+  text-align: center;
+}
+
+.empty-state h2 {
+  margin: 0 0 8px 0;
+  font-size: 24px;
+  color: #333;
+}
+
+.empty-state p {
+  margin: 0;
+  font-size: 16px;
+}
+
+.message-group {
+  margin-bottom: 32px;
+}
+
+.user-message,
+.assistant-message {
+  margin-bottom: 16px;
+}
+
+.message-label {
+  font-size: 12px;
+  font-weight: 600;
+  color: #666;
+  margin-bottom: 8px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.user-message .message-content {
+  background: #f0f7ff;
+  padding: 16px;
+  border-radius: 8px;
+  border: 1px solid #d0e7ff;
+  color: #333;
+  line-height: 1.6;
+  max-width: 80%;
+  white-space: pre-wrap;
+}
+
+.loading-indicator {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 16px;
+  color: #666;
+  font-size: 14px;
+}
+
+.spinner {
+  width: 20px;
+  height: 20px;
+  border: 2px solid #e0e0e0;
+  border-top-color: #4a90e2;
+  border-radius: 50%;
+  animation: spin 0.8s linear infinite;
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.input-form {
+  display: flex;
+  align-items: flex-end;
+  gap: 12px;
+  padding: 24px;
+  border-top: 1px solid #e0e0e0;
+  background: #fafafa;
+}
+
+.message-input {
+  flex: 1;
+  padding: 14px;
+  background: #ffffff;
+  border: 1px solid #d0d0d0;
+  border-radius: 8px;
+  color: #333;
+  font-size: 15px;
+  font-family: inherit;
+  line-height: 1.5;
+  outline: none;
+  resize: vertical;
+  min-height: 80px;
+  max-height: 300px;
+}
+
+.message-input:focus {
+  border-color: #4a90e2;
+  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
+}
+
+.message-input:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  background: #f5f5f5;
+}
+
+.send-button {
+  padding: 14px 28px;
+  background: #4a90e2;
+  border: 1px solid #4a90e2;
+  border-radius: 8px;
+  color: #fff;
+  font-size: 15px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: background 0.2s;
+  white-space: nowrap;
+  align-self: flex-end;
+}
+
+.send-button:hover:not(:disabled) {
+  background: #357abd;
+  border-color: #357abd;
+}
+
+.send-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  background: #ccc;
+  border-color: #ccc;
+}
diff --git a/frontend/src/components/ChatInterface.jsx b/frontend/src/components/ChatInterface.jsx
new file mode 100644
index 0000000..951183f
--- /dev/null
+++ b/frontend/src/components/ChatInterface.jsx
@@ -0,0 +1,117 @@
+import { useState, useEffect, useRef } from 'react';
+import ReactMarkdown from 'react-markdown';
+import Stage1 from './Stage1';
+import Stage2 from './Stage2';
+import Stage3 from './Stage3';
+import './ChatInterface.css';
+
+export default function ChatInterface({
+  conversation,
+  onSendMessage,
+  isLoading,
+}) {
+  const [input, setInput] = useState('');
+  const messagesEndRef = useRef(null);
+
+  const scrollToBottom = () => {
+    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
+  };
+
+  useEffect(() => {
+    scrollToBottom();
+  }, [conversation]);
+
+  const handleSubmit = (e) => {
+    e.preventDefault();
+    if (input.trim() && !isLoading) {
+      onSendMessage(input);
+      setInput('');
+    }
+  };
+
+  const handleKeyDown = (e) => {
+    // Submit on Enter (without Shift)
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      handleSubmit(e);
+    }
+  };
+
+  if (!conversation) {
+    return (
+      <div className="chat-interface">
+        <div className="empty-state">
+          <h2>Welcome to LLM Council</h2>
+          <p>Create a new conversation to get started</p>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="chat-interface">
+      <div className="messages-container">
+        {conversation.messages.length === 0 ? (
+          <div className="empty-state">
+            <h2>Start a conversation</h2>
+            <p>Ask a question to consult the LLM Council</p>
+          </div>
+        ) : (
+          conversation.messages.map((msg, index) => (
+            <div key={index} className="message-group">
+              {msg.role === 'user' ? (
+                <div className="user-message">
+                  <div className="message-label">You</div>
+                  <div className="message-content">
+                    <div className="markdown-content">
+                      <ReactMarkdown>{msg.content}</ReactMarkdown>
+                    </div>
+                  </div>
+                </div>
+              ) : (
+                <div className="assistant-message">
+                  <div className="message-label">LLM Council</div>
+                  <Stage1 responses={msg.stage1} />
+                  <Stage2
+                    rankings={msg.stage2}
+                    labelToModel={msg.metadata?.label_to_model}
+                    aggregateRankings={msg.metadata?.aggregate_rankings}
+                  />
+                  <Stage3 finalResponse={msg.stage3} />
+                </div>
+              )}
+            </div>
+          ))
+        )}
+
+        {isLoading && (
+          <div className="loading-indicator">
+            <div className="spinner"></div>
+            <span>Consulting the council...</span>
+          </div>
+        )}
+
+        <div ref={messagesEndRef} />
+      </div>
+
+      <form className="input-form" onSubmit={handleSubmit}>
+        <textarea
+          className="message-input"
+          placeholder="Ask your question... (Shift+Enter for new line, Enter to send)"
+          value={input}
+          onChange={(e) => setInput(e.target.value)}
+          onKeyDown={handleKeyDown}
+          disabled={isLoading}
+          rows={3}
+        />
+        <button
+          type="submit"
+          className="send-button"
+          disabled={!input.trim() || isLoading}
+        >
+          Send
+        </button>
+      </form>
+    </div>
+  );
+}
diff --git a/frontend/src/components/Sidebar.css b/frontend/src/components/Sidebar.css
new file mode 100644
index 0000000..c4f4b97
--- /dev/null
+++ b/frontend/src/components/Sidebar.css
@@ -0,0 +1,78 @@
+.sidebar {
+  width: 260px;
+  background: #f8f8f8;
+  border-right: 1px solid #e0e0e0;
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+}
+
+.sidebar-header {
+  padding: 16px;
+  border-bottom: 1px solid #e0e0e0;
+}
+
+.sidebar-header h1 {
+  font-size: 18px;
+  margin: 0 0 12px 0;
+  color: #333;
+}
+
+.new-conversation-btn {
+  width: 100%;
+  padding: 10px;
+  background: #4a90e2;
+  border: 1px solid #4a90e2;
+  border-radius: 6px;
+  color: #fff;
+  cursor: pointer;
+  font-size: 14px;
+  transition: background 0.2s;
+  font-weight: 500;
+}
+
+.new-conversation-btn:hover {
+  background: #357abd;
+  border-color: #357abd;
+}
+
+.conversation-list {
+  flex: 1;
+  overflow-y: auto;
+  padding: 8px;
+}
+
+.no-conversations {
+  padding: 16px;
+  text-align: center;
+  color: #999;
+  font-size: 14px;
+}
+
+.conversation-item {
+  padding: 12px;
+  margin-bottom: 4px;
+  border-radius: 6px;
+  cursor: pointer;
+  transition: background 0.2s;
+}
+
+.conversation-item:hover {
+  background: #f0f0f0;
+}
+
+.conversation-item.active {
+  background: #e8f0fe;
+  border: 1px solid #4a90e2;
+}
+
+.conversation-title {
+  color: #333;
+  font-size: 14px;
+  margin-bottom: 4px;
+}
+
+.conversation-meta {
+  color: #999;
+  font-size: 12px;
+}
diff --git a/frontend/src/components/Sidebar.jsx b/frontend/src/components/Sidebar.jsx
new file mode 100644
index 0000000..c189690
--- /dev/null
+++ b/frontend/src/components/Sidebar.jsx
@@ -0,0 +1,43 @@
+import { useState, useEffect } from 'react';
+import './Sidebar.css';
+
+export default function Sidebar({
+  conversations,
+  currentConversationId,
+  onSelectConversation,
+  onNewConversation,
+}) {
+  return (
+    <div className="sidebar">
+      <div className="sidebar-header">
+        <h1>LLM Council</h1>
+        <button className="new-conversation-btn" onClick={onNewConversation}>
+          + New Conversation
+        </button>
+      </div>
+
+      <div className="conversation-list">
+        {conversations.length === 0 ? (
+          <div className="no-conversations">No conversations yet</div>
+        ) : (
+          conversations.map((conv) => (
+            <div
+              key={conv.id}
+              className={`conversation-item ${
+                conv.id === currentConversationId ? 'active' : ''
+              }`}
+              onClick={() => onSelectConversation(conv.id)}
+            >
+              <div className="conversation-title">
+                Conversation {conv.id.slice(0, 8)}...
+              </div>
+              <div className="conversation-meta">
+                {conv.message_count} messages
+              </div>
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/Stage1.css b/frontend/src/components/Stage1.css
new file mode 100644
index 0000000..1f5133e
--- /dev/null
+++ b/frontend/src/components/Stage1.css
@@ -0,0 +1,65 @@
+.stage {
+  margin: 24px 0;
+  padding: 20px;
+  background: #fafafa;
+  border-radius: 8px;
+  border: 1px solid #e0e0e0;
+}
+
+.stage-title {
+  margin: 0 0 16px 0;
+  color: #333;
+  font-size: 16px;
+  font-weight: 600;
+}
+
+.tabs {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 16px;
+  flex-wrap: wrap;
+}
+
+.tab {
+  padding: 8px 16px;
+  background: #ffffff;
+  border: 1px solid #d0d0d0;
+  border-radius: 6px 6px 0 0;
+  color: #666;
+  cursor: pointer;
+  font-size: 14px;
+  transition: all 0.2s;
+}
+
+.tab:hover {
+  background: #f0f0f0;
+  color: #333;
+  border-color: #4a90e2;
+}
+
+.tab.active {
+  background: #ffffff;
+  color: #4a90e2;
+  border-color: #4a90e2;
+  border-bottom-color: #ffffff;
+  font-weight: 600;
+}
+
+.tab-content {
+  background: #ffffff;
+  padding: 16px;
+  border-radius: 6px;
+  border: 1px solid #e0e0e0;
+}
+
+.model-name {
+  color: #888;
+  font-size: 12px;
+  margin-bottom: 12px;
+  font-family: monospace;
+}
+
+.response-text {
+  color: #333;
+  line-height: 1.6;
+}
diff --git a/frontend/src/components/Stage1.jsx b/frontend/src/components/Stage1.jsx
new file mode 100644
index 0000000..071937c
--- /dev/null
+++ b/frontend/src/components/Stage1.jsx
@@ -0,0 +1,36 @@
+import { useState } from 'react';
+import ReactMarkdown from 'react-markdown';
+import './Stage1.css';
+
+export default function Stage1({ responses }) {
+  const [activeTab, setActiveTab] = useState(0);
+
+  if (!responses || responses.length === 0) {
+    return null;
+  }
+
+  return (
+    <div className="stage stage1">
+      <h3 className="stage-title">Stage 1: Individual Responses</h3>
+
+      <div className="tabs">
+        {responses.map((resp, index) => (
+          <button
+            key={index}
+            className={`tab ${activeTab === index ? 'active' : ''}`}
+            onClick={() => setActiveTab(index)}
+          >
+            {resp.model.split('/')[1] || resp.model}
+          </button>
+        ))}
+      </div>
+
+      <div className="tab-content">
+        <div className="model-name">{responses[activeTab].model}</div>
+        <div className="response-text markdown-content">
+          <ReactMarkdown>{responses[activeTab].response}</ReactMarkdown>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/Stage2.css b/frontend/src/components/Stage2.css
new file mode 100644
index 0000000..99c460a
--- /dev/null
+++ b/frontend/src/components/Stage2.css
@@ -0,0 +1,153 @@
+.stage2 {
+  background: #fafafa;
+}
+
+.stage2 h4 {
+  margin: 20px 0 8px 0;
+  color: #333;
+  font-size: 14px;
+  font-weight: 600;
+}
+
+.stage2 h4:first-of-type {
+  margin-top: 0;
+}
+
+.stage-description {
+  margin: 0 0 12px 0;
+  color: #666;
+  font-size: 13px;
+  line-height: 1.5;
+}
+
+.aggregate-rankings {
+  background: #f0f7ff;
+  padding: 16px;
+  border-radius: 8px;
+  margin-bottom: 20px;
+  border: 2px solid #d0e7ff;
+}
+
+.aggregate-rankings h4 {
+  margin: 0 0 12px 0;
+  color: #2a7ae2;
+  font-size: 15px;
+}
+
+.aggregate-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.aggregate-item {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px;
+  background: #ffffff;
+  border-radius: 6px;
+  border: 1px solid #d0e7ff;
+}
+
+.rank-position {
+  color: #2a7ae2;
+  font-weight: 700;
+  font-size: 16px;
+  min-width: 35px;
+}
+
+.rank-model {
+  flex: 1;
+  color: #333;
+  font-family: monospace;
+  font-size: 14px;
+  font-weight: 500;
+}
+
+.rank-score {
+  color: #666;
+  font-size: 13px;
+  font-family: monospace;
+}
+
+.stage2 .tabs {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 16px;
+  flex-wrap: wrap;
+}
+
+.stage2 .tab {
+  padding: 8px 16px;
+  background: #ffffff;
+  border: 1px solid #d0d0d0;
+  border-radius: 6px 6px 0 0;
+  color: #666;
+  cursor: pointer;
+  font-size: 14px;
+  transition: all 0.2s;
+}
+
+.stage2 .tab:hover {
+  background: #f0f0f0;
+  color: #333;
+  border-color: #4a90e2;
+}
+
+.stage2 .tab.active {
+  background: #ffffff;
+  color: #4a90e2;
+  border-color: #4a90e2;
+  border-bottom-color: #ffffff;
+  font-weight: 600;
+}
+
+.stage2 .tab-content {
+  background: #ffffff;
+  padding: 16px;
+  border-radius: 6px;
+  border: 1px solid #e0e0e0;
+  margin-bottom: 20px;
+}
+
+.ranking-model {
+  color: #888;
+  font-size: 12px;
+  font-family: monospace;
+  margin-bottom: 12px;
+}
+
+.ranking-content {
+  color: #333;
+  line-height: 1.6;
+  font-size: 14px;
+}
+
+.parsed-ranking {
+  margin-top: 16px;
+  padding-top: 16px;
+  border-top: 2px solid #e0e0e0;
+}
+
+.parsed-ranking strong {
+  color: #2a7ae2;
+  font-size: 13px;
+}
+
+.parsed-ranking ol {
+  margin: 8px 0 0 0;
+  padding-left: 24px;
+  color: #333;
+}
+
+.parsed-ranking li {
+  margin: 4px 0;
+  font-family: monospace;
+  font-size: 13px;
+}
+
+.rank-count {
+  color: #999;
+  font-size: 12px;
+}
diff --git a/frontend/src/components/Stage2.jsx b/frontend/src/components/Stage2.jsx
new file mode 100644
index 0000000..2550fa6
--- /dev/null
+++ b/frontend/src/components/Stage2.jsx
@@ -0,0 +1,99 @@
+import { useState } from 'react';
+import ReactMarkdown from 'react-markdown';
+import './Stage2.css';
+
+function deAnonymizeText(text, labelToModel) {
+  if (!labelToModel) return text;
+
+  let result = text;
+  // Replace each "Response X" with the actual model name
+  Object.entries(labelToModel).forEach(([label, model]) => {
+    const modelShortName = model.split('/')[1] || model;
+    result = result.replace(new RegExp(label, 'g'), `**${modelShortName}**`);
+  });
+  return result;
+}
+
+export default function Stage2({ rankings, labelToModel, aggregateRankings }) {
+  const [activeTab, setActiveTab] = useState(0);
+
+  if (!rankings || rankings.length === 0) {
+    return null;
+  }
+
+  return (
+    <div className="stage stage2">
+      <h3 className="stage-title">Stage 2: Peer Rankings</h3>
+
+      <h4>Raw Evaluations</h4>
+      <p className="stage-description">
+        Each model evaluated all responses (anonymized as Response A, B, C, etc.) and provided rankings.
+        Below, model names are shown in <strong>bold</strong> for readability, but the original evaluation used anonymous labels.
+      </p>
+
+      <div className="tabs">
+        {rankings.map((rank, index) => (
+          <button
+            key={index}
+            className={`tab ${activeTab === index ? 'active' : ''}`}
+            onClick={() => setActiveTab(index)}
+          >
+            {rank.model.split('/')[1] || rank.model}
+          </button>
+        ))}
+      </div>
+
+      <div className="tab-content">
+        <div className="ranking-model">
+          {rankings[activeTab].model}
+        </div>
+        <div className="ranking-content markdown-content">
+          <ReactMarkdown>
+            {deAnonymizeText(rankings[activeTab].ranking, labelToModel)}
+          </ReactMarkdown>
+        </div>
+
+        {rankings[activeTab].parsed_ranking &&
+         rankings[activeTab].parsed_ranking.length > 0 && (
+          <div className="parsed-ranking">
+            <strong>Extracted Ranking:</strong>
+            <ol>
+              {rankings[activeTab].parsed_ranking.map((label, i) => (
+                <li key={i}>
+                  {labelToModel && labelToModel[label]
+                    ? labelToModel[label].split('/')[1] || labelToModel[label]
+                    : label}
+                </li>
+              ))}
+            </ol>
+          </div>
+        )}
+      </div>
+
+      {aggregateRankings && aggregateRankings.length > 0 && (
+        <div className="aggregate-rankings">
+          <h4>Aggregate Rankings (Street Cred)</h4>
+          <p className="stage-description">
+            Combined results across all peer evaluations (lower score is better):
+          </p>
+          <div className="aggregate-list">
+            {aggregateRankings.map((agg, index) => (
+              <div key={index} className="aggregate-item">
+                <span className="rank-position">#{index + 1}</span>
+                <span className="rank-model">
+                  {agg.model.split('/')[1] || agg.model}
+                </span>
+                <span className="rank-score">
+                  Avg: {agg.average_rank.toFixed(2)}
+                </span>
+                <span className="rank-count">
+                  ({agg.rankings_count} votes)
+                </span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/components/Stage3.css b/frontend/src/components/Stage3.css
new file mode 100644
index 0000000..954a9d9
--- /dev/null
+++ b/frontend/src/components/Stage3.css
@@ -0,0 +1,25 @@
+.stage3 {
+  background: #f0fff0;
+  border-color: #c8e6c8;
+}
+
+.final-response {
+  background: #ffffff;
+  padding: 20px;
+  border-radius: 6px;
+  border: 1px solid #c8e6c8;
+}
+
+.chairman-label {
+  color: #2d8a2d;
+  font-size: 12px;
+  font-family: monospace;
+  margin-bottom: 12px;
+  font-weight: 600;
+}
+
+.final-text {
+  color: #333;
+  line-height: 1.7;
+  font-size: 15px;
+}
diff --git a/frontend/src/components/Stage3.jsx b/frontend/src/components/Stage3.jsx
new file mode 100644
index 0000000..9a9dbf7
--- /dev/null
+++ b/frontend/src/components/Stage3.jsx
@@ -0,0 +1,22 @@
+import ReactMarkdown from 'react-markdown';
+import './Stage3.css';
+
+export default function Stage3({ finalResponse }) {
+  if (!finalResponse) {
+    return null;
+  }
+
+  return (
+    <div className="stage stage3">
+      <h3 className="stage-title">Stage 3: Final Council Answer</h3>
+      <div className="final-response">
+        <div className="chairman-label">
+          Chairman: {finalResponse.model.split('/')[1] || finalResponse.model}
+        </div>
+        <div className="final-text markdown-content">
+          <ReactMarkdown>{finalResponse.response}</ReactMarkdown>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/index.css b/frontend/src/index.css
new file mode 100644
index 0000000..698f393
--- /dev/null
+++ b/frontend/src/index.css
@@ -0,0 +1,98 @@
+:root {
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  min-width: 320px;
+  min-height: 100vh;
+  background: #f5f5f5;
+}
+
+#root {
+  height: 100vh;
+  width: 100vw;
+  overflow: hidden;
+}
+
+/* Global markdown styling */
+.markdown-content {
+  padding: 12px;
+}
+
+.markdown-content p {
+  margin: 0 0 12px 0;
+}
+
+.markdown-content p:last-child {
+  margin-bottom: 0;
+}
+
+.markdown-content h1,
+.markdown-content h2,
+.markdown-content h3,
+.markdown-content h4,
+.markdown-content h5,
+.markdown-content h6 {
+  margin: 16px 0 8px 0;
+}
+
+.markdown-content h1:first-child,
+.markdown-content h2:first-child,
+.markdown-content h3:first-child,
+.markdown-content h4:first-child,
+.markdown-content h5:first-child,
+.markdown-content h6:first-child {
+  margin-top: 0;
+}
+
+.markdown-content ul,
+.markdown-content ol {
+  margin: 0 0 12px 0;
+  padding-left: 24px;
+}
+
+.markdown-content li {
+  margin: 4px 0;
+}
+
+.markdown-content pre {
+  background: #f5f5f5;
+  padding: 12px;
+  border-radius: 4px;
+  overflow-x: auto;
+  margin: 0 0 12px 0;
+}
+
+.markdown-content code {
+  background: #f5f5f5;
+  padding: 2px 6px;
+  border-radius: 3px;
+  font-family: monospace;
+  font-size: 0.9em;
+}
+
+.markdown-content pre code {
+  background: none;
+  padding: 0;
+}
+
+.markdown-content blockquote {
+  margin: 0 0 12px 0;
+  padding-left: 16px;
+  border-left: 4px solid #ddd;
+  color: #666;
+}
diff --git a/frontend/src/main.jsx b/frontend/src/main.jsx
new file mode 100644
index 0000000..b9a1a6d
--- /dev/null
+++ b/frontend/src/main.jsx
@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.jsx'
+
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)