diff --git a/public/css/style.css b/public/css/style.css
index e8edf03..83f7f2a 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -44,9 +44,16 @@
 }
 
 /* ─── Reset ──────────────────────────────────────────── */
-*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
 
-html, body {
+html,
+body {
   height: 100%;
   font-family: var(--font-sans);
   font-size: 14px;
@@ -57,13 +64,22 @@ html, body {
 }
 
 /* ─── Scrollbar ──────────────────────────────────────── */
-::-webkit-scrollbar { width: 6px; }
-::-webkit-scrollbar-track { background: transparent; }
+::-webkit-scrollbar {
+  width: 6px;
+}
+
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+
 ::-webkit-scrollbar-thumb {
   background: var(--bg-active);
   border-radius: 3px;
 }
-::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
+
+::-webkit-scrollbar-thumb:hover {
+  background: var(--text-muted);
+}
 
 /* ─── Header ─────────────────────────────────────────── */
 .header {
@@ -77,7 +93,11 @@ html, body {
   z-index: 100;
 }
 
-.header-left { display: flex; align-items: center; gap: 12px; }
+.header-left {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
 
 .logo {
   display: flex;
@@ -94,7 +114,11 @@ html, body {
   -webkit-text-fill-color: transparent;
 }
 
-.header-right { display: flex; align-items: center; gap: 16px; }
+.header-right {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+}
 
 .connection-status {
   display: flex;
@@ -112,8 +136,14 @@ html, body {
   transition: background var(--transition-normal);
 }
 
-.status-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }
-.status-dot.error { background: var(--error); }
+.status-dot.connected {
+  background: var(--success);
+  box-shadow: 0 0 6px var(--success);
+}
+
+.status-dot.error {
+  background: var(--error);
+}
 
 /* ─── Main Layout ────────────────────────────────────── */
 .main-layout {
@@ -181,14 +211,34 @@ html, body {
   flex-shrink: 0;
 }
 
-.session-indicator.connected { background: var(--success); box-shadow: 0 0 4px rgba(52, 211, 153, 0.4); }
-.session-indicator.connecting { background: var(--warning); animation: pulse 1.5s infinite; }
-.session-indicator.disconnected { background: var(--text-muted); }
-.session-indicator.error { background: var(--error); }
+.session-indicator.connected {
+  background: var(--success);
+  box-shadow: 0 0 4px rgba(52, 211, 153, 0.4);
+}
+
+.session-indicator.connecting {
+  background: var(--warning);
+  animation: pulse 1.5s infinite;
+}
+
+.session-indicator.disconnected {
+  background: var(--text-muted);
+}
+
+.session-indicator.error {
+  background: var(--error);
+}
 
 @keyframes pulse {
-  0%, 100% { opacity: 1; }
-  50% { opacity: 0.4; }
+
+  0%,
+  100% {
+    opacity: 1;
+  }
+
+  50% {
+    opacity: 0.4;
+  }
 }
 
 .session-info {
@@ -223,8 +273,14 @@ html, body {
   font-size: 14px;
 }
 
-.session-card:hover .session-remove { opacity: 1; }
-.session-remove:hover { color: var(--error); background: rgba(248, 113, 113, 0.1); }
+.session-card:hover .session-remove {
+  opacity: 1;
+}
+
+.session-remove:hover {
+  color: var(--error);
+  background: rgba(248, 113, 113, 0.1);
+}
 
 /* ─── Chat Area ──────────────────────────────────────── */
 .chat-area {
@@ -317,32 +373,265 @@ html, body {
   font-size: 13px;
 }
 
-/* Antigravity 에서 가져온 HTML을 표시하는 컨테이너 */
-.chat-messages .ag-content {
-  font-family: var(--font-sans);
-  line-height: 1.6;
+/* Antigravity 에서 가져온 구조화 메시지를 렌더링하는 컴포넌트 */
+
+/* --- 메시지 공통 --- */
+.chat-messages>* {
+  margin-bottom: 8px;
+}
+
+/* --- 작업 카드 (Task boundary) --- */
+.msg-card {
+  border: 1px solid var(--border-subtle);
+  border-radius: 10px;
+  overflow: hidden;
+  background: var(--bg-secondary);
+  transition: border-color var(--transition-fast);
+}
+
+.msg-card:hover {
+  border-color: var(--border-medium);
+}
+
+.msg-card-header {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 14px;
+}
+
+.msg-toggle {
+  font-size: 11px;
+  color: var(--text-muted);
+  width: 14px;
+  text-align: center;
+  flex-shrink: 0;
+  transition: color var(--transition-fast);
+}
+
+.msg-card-header:hover .msg-toggle {
   color: var(--text-primary);
 }
 
-.chat-messages .ag-content pre,
-.chat-messages .ag-content code {
-  font-family: var(--font-mono);
+.msg-card-title {
   font-size: 13px;
+  font-weight: 600;
+  color: var(--text-primary);
 }
 
-.chat-messages .ag-content pre {
+.msg-card-summary {
+  width: 100%;
+  font-size: 12px;
+  color: var(--text-secondary);
+  line-height: 1.5;
+  padding-left: 22px;
+}
+
+.msg-card-body {
+  border-top: 1px solid var(--border-subtle);
+  padding: 8px 14px 10px;
+}
+
+.msg-step {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  padding: 3px 0;
+  font-size: 12px;
+  color: var(--text-secondary);
+  line-height: 1.4;
+}
+
+.msg-step-icon {
+  width: 16px;
+  text-align: center;
+  flex-shrink: 0;
+  font-size: 11px;
+}
+
+.msg-step-text {
+  flex: 1;
+  min-width: 0;
+  word-break: break-word;
+}
+
+/* --- 텍스트 메시지 --- */
+.msg-text {
+  font-size: 13px;
+  line-height: 1.6;
+  color: var(--text-primary);
+  padding: 4px 0;
+  word-break: break-word;
+}
+
+.msg-text p {
+  margin: 4px 0;
+}
+
+.msg-text ul,
+.msg-text ol {
+  padding-left: 18px;
+  margin: 4px 0;
+}
+
+.msg-text li {
+  margin: 2px 0;
+}
+
+.msg-text strong {
+  font-weight: 600;
+}
+
+.msg-text a {
+  color: var(--text-accent);
+  text-decoration: none;
+}
+
+.msg-text a:hover {
+  text-decoration: underline;
+}
+
+.msg-text code:not(pre code) {
+  font-family: var(--font-mono);
+  font-size: 12px;
+  background: var(--bg-tertiary);
+  padding: 1px 5px;
+  border-radius: 4px;
+  color: var(--text-accent);
+}
+
+.msg-text pre {
   background: var(--bg-tertiary);
   border: 1px solid var(--border-subtle);
   border-radius: 8px;
-  padding: 14px;
+  padding: 10px 12px;
   overflow-x: auto;
-  margin: 10px 0;
+  margin: 6px 0;
+  font-family: var(--font-mono);
+  font-size: 12px;
+  line-height: 1.5;
 }
 
-.chat-messages .ag-content code {
+.msg-text img {
+  max-width: 320px;
+  max-height: 200px;
+  border-radius: 8px;
+  margin: 4px 0;
+}
+
+/* --- Thought Process --- */
+.msg-thought {
+  margin: 4px 0;
+}
+
+.msg-thought-btn {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  width: 100%;
+  padding: 6px 10px;
+  background: none;
+  border: none;
+  border-radius: 6px;
+  color: var(--text-muted);
+  font-family: var(--font-sans);
+  font-size: 12px;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  text-align: left;
+}
+
+.msg-thought-btn:hover {
+  background: var(--bg-hover);
+  color: var(--text-secondary);
+}
+
+.msg-thought-icon {
+  font-size: 14px;
+}
+
+/* --- 코드 블록 --- */
+.msg-code-block {
+  border: 1px solid var(--border-subtle);
+  border-radius: 8px;
+  overflow: hidden;
+  margin: 4px 0;
+}
+
+.msg-code-lang {
+  padding: 4px 12px;
   background: var(--bg-tertiary);
-  padding: 2px 6px;
-  border-radius: 4px;
+  border-bottom: 1px solid var(--border-subtle);
+  font-family: var(--font-mono);
+  font-size: 11px;
+  color: var(--text-muted);
+  text-transform: lowercase;
+}
+
+.msg-code-block pre {
+  margin: 0;
+  padding: 10px 12px;
+  background: var(--bg-primary);
+  overflow-x: auto;
+  font-size: 12px;
+  line-height: 1.5;
+}
+
+.msg-code-block code {
+  font-family: var(--font-mono);
+  font-size: 12px;
+  color: var(--text-primary);
+}
+
+/* --- 이미지 --- */
+.msg-image {
+  margin: 4px 0;
+}
+
+.msg-image img {
+  max-width: 320px;
+  max-height: 200px;
+  border-radius: 8px;
+  border: 1px solid var(--border-subtle);
+  object-fit: contain;
+}
+
+/* --- 액션 버튼 --- */
+.msg-actions {
+  display: flex;
+  gap: 6px;
+  padding: 4px 0;
+  flex-wrap: wrap;
+}
+
+.msg-action-btn {
+  padding: 4px 12px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-subtle);
+  border-radius: 6px;
+  color: var(--text-secondary);
+  font-family: var(--font-sans);
+  font-size: 12px;
+  cursor: default;
+  transition: all var(--transition-fast);
+}
+
+.msg-action-btn[style*="cursor: pointer"]:hover {
+  background: var(--bg-hover);
+  border-color: var(--border-medium);
+  color: var(--text-primary);
+}
+
+.msg-action-btn.msg-action-primary {
+  background: var(--accent-primary);
+  color: white;
+  border-color: var(--accent-primary);
+}
+
+.msg-action-btn.msg-action-primary:hover {
+  background: var(--accent-secondary);
+  transform: scale(1.02);
 }
 
 /* Chat Input */
@@ -371,8 +660,13 @@ html, body {
   transition: border-color var(--transition-fast);
 }
 
-.chat-input-area textarea::placeholder { color: var(--text-muted); }
-.chat-input-area textarea:focus { border-color: var(--accent-primary); }
+.chat-input-area textarea::placeholder {
+  color: var(--text-muted);
+}
+
+.chat-input-area textarea:focus {
+  border-color: var(--accent-primary);
+}
 
 /* ─── Buttons ────────────────────────────────────────── */
 .btn-icon {
@@ -430,7 +724,9 @@ html, body {
   transform: scale(1.05);
 }
 
-.btn-send:active { transform: scale(0.95); }
+.btn-send:active {
+  transform: scale(0.95);
+}
 
 .btn {
   padding: 8px 16px;
@@ -448,7 +744,9 @@ html, body {
   color: white;
 }
 
-.btn-primary:hover { background: var(--accent-secondary); }
+.btn-primary:hover {
+  background: var(--accent-secondary);
+}
 
 .btn-secondary {
   background: var(--bg-tertiary);
@@ -456,7 +754,9 @@ html, body {
   border: 1px solid var(--border-subtle);
 }
 
-.btn-secondary:hover { background: var(--bg-hover); }
+.btn-secondary:hover {
+  background: var(--bg-hover);
+}
 
 /* ─── Modal ──────────────────────────────────────────── */
 .modal-backdrop {
@@ -471,7 +771,15 @@ html, body {
   animation: fadeIn 0.15s ease;
 }
 
-@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+
+  to {
+    opacity: 1;
+  }
+}
 
 .modal {
   background: var(--bg-elevated);
@@ -483,7 +791,17 @@ html, body {
   animation: slideUp 0.2s ease;
 }
 
-@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: none; opacity: 1; } }
+@keyframes slideUp {
+  from {
+    transform: translateY(20px);
+    opacity: 0;
+  }
+
+  to {
+    transform: none;
+    opacity: 1;
+  }
+}
 
 .modal-header {
   display: flex;
@@ -533,7 +851,9 @@ html, body {
   transition: border-color var(--transition-fast);
 }
 
-.form-group input:focus { border-color: var(--accent-primary); }
+.form-group input:focus {
+  border-color: var(--accent-primary);
+}
 
 .form-hint {
   font-size: 11px;
@@ -605,11 +925,32 @@ html, body {
   animation-fill-mode: forwards;
 }
 
-@keyframes slideInRight { from { transform: translateX(100px); opacity: 0; } to { transform: none; opacity: 1; } }
-@keyframes fadeOut { to { opacity: 0; transform: translateY(10px); } }
+@keyframes slideInRight {
+  from {
+    transform: translateX(100px);
+    opacity: 0;
+  }
 
-.toast.error { border-color: var(--error); }
-.toast.success { border-color: var(--success); }
+  to {
+    transform: none;
+    opacity: 1;
+  }
+}
+
+@keyframes fadeOut {
+  to {
+    opacity: 0;
+    transform: translateY(10px);
+  }
+}
+
+.toast.error {
+  border-color: var(--error);
+}
+
+.toast.success {
+  border-color: var(--success);
+}
 
 /* ─── View Tabs (Chat ↔ Mirror) ──────────────────────── */
 .view-tabs {
@@ -677,5 +1018,4 @@ html, body {
   font-size: 14px;
   pointer-events: none;
   animation: pulse 1.5s infinite;
-}
-
+}
\ No newline at end of file
diff --git a/public/js/app.js b/public/js/app.js
index 54044a8..4103c13 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -98,7 +98,7 @@
 
             case 'chat_update':
                 if (msg.sessionId === sessionPanel.activeSessionId) {
-                    chatPanel.updateChat(msg.html);
+                    chatPanel.updateChat(msg.messages);
                 }
                 break;
 
@@ -129,6 +129,10 @@
             case 'screencast_stopped':
                 break;
 
+            case 'action_clicked':
+                // 서버에서의 확인 응답 (토스트는 이미 프론트엔드에서 표시)
+                break;
+
             case 'error':
                 showToast(msg.message, 'error');
                 break;
@@ -164,6 +168,17 @@
         });
     };
 
+    chatPanel.onActionClick = (button) => {
+        sendWs({
+            type: 'click_action',
+            sessionId: sessionPanel.activeSessionId,
+            label: button.label,
+            x: button.x,
+            y: button.y,
+        });
+        showToast(`"${button.label}" 클릭`, 'success');
+    };
+
     // ─── 미러 패널 이벤트 ─────────────────────────────
     mirrorPanel.onStartScreencast = (sessionId) => {
         sendWs({ type: 'start_screencast', sessionId });
diff --git a/public/js/chat-panel.js b/public/js/chat-panel.js
index 2a8c6e6..fb70cfb 100644
--- a/public/js/chat-panel.js
+++ b/public/js/chat-panel.js
@@ -1,5 +1,5 @@
 /**
- * Chat Panel — 채팅 표시/입력 UI 관리
+ * Chat Panel — 구조화된 메시지 렌더링 (Antigravity 스타일)
  */
 
 class ChatPanel {
@@ -13,22 +13,19 @@ class ChatPanel {
         this.sessionStatusEl = document.getElementById('chatSessionStatus');
 
         this.onSendMessage = null; // callback(text)
+        this.onActionClick = null; // callback(button) - {label, x, y}
         this.activeSession = null;
+        this._lastHash = '';
 
         this._setupInput();
     }
 
-    /**
-     * 입력 이벤트 바인딩
-     */
     _setupInput() {
-        // 자동 높이 조절
         this.inputEl.addEventListener('input', () => {
             this.inputEl.style.height = 'auto';
             this.inputEl.style.height = Math.min(this.inputEl.scrollHeight, 120) + 'px';
         });
 
-        // Enter로 전송 (Shift+Enter는 줄바꿈)
         this.inputEl.addEventListener('keydown', (e) => {
             if (e.key === 'Enter' && !e.shiftKey) {
                 e.preventDefault();
@@ -36,47 +33,27 @@ class ChatPanel {
             }
         });
 
-        this.sendBtn.addEventListener('click', () => {
-            this._sendMessage();
-        });
+        this.sendBtn.addEventListener('click', () => this._sendMessage());
     }
 
     _sendMessage() {
         const text = this.inputEl.value.trim();
         if (!text) return;
-
-        if (this.onSendMessage) {
-            this.onSendMessage(text);
-        }
-
-        // 입력창 초기화
+        if (this.onSendMessage) this.onSendMessage(text);
         this.inputEl.value = '';
         this.inputEl.style.height = 'auto';
     }
 
-    /**
-     * 세션 선택 시 UI 표시
-     */
     showSession(session) {
         this.activeSession = session;
         this.emptyEl.style.display = 'none';
         this.containerEl.style.display = 'flex';
-
         this.sessionNameEl.textContent = session.name;
         this.sessionStatusEl.textContent = session.status === 'connected' ? '● 연결됨' : session.status;
-
-        this.messagesEl.innerHTML = `
-      <div class="chat-welcome">
-        <p>채팅 데이터를 불러오는 중...</p>
-      </div>
-    `;
-
+        this.messagesEl.innerHTML = '<div class="chat-welcome"><p>채팅 데이터를 불러오는 중...</p></div>';
         this.inputEl.focus();
     }
 
-    /**
-     * 빈 상태 표시
-     */
     showEmpty() {
         this.activeSession = null;
         this.emptyEl.style.display = 'flex';
@@ -84,42 +61,258 @@ class ChatPanel {
     }
 
     /**
-     * 채팅 내용 업데이트 (Antigravity DOM HTML)
+     * 구조화된 메시지 배열로 채팅 렌더링
      */
-    updateChat(html) {
-        if (!html || html.includes('chat container not found')) {
+    updateChat(messages) {
+        if (!messages || !Array.isArray(messages) || messages.length === 0) {
             this.messagesEl.innerHTML = `
-        <div class="chat-welcome">
-          <p>⚠️ 채팅 컨테이너를 찾을 수 없습니다.<br>
-          Antigravity에서 채팅을 시작해주세요.</p>
-        </div>
-      `;
+                <div class="chat-welcome">
+                    <p>⚠️ 채팅 데이터를 가져올 수 없습니다.<br>
+                    Antigravity에서 채팅을 시작해주세요.</p>
+                </div>`;
             return;
         }
 
-        // HTML 삽입 (Antigravity에서 가져온 DOM)
+        // 변경 감지 — 같은 내용이면 리렌더 안 함
+        const hash = JSON.stringify(messages).length + ':' + messages.length;
+        if (hash === this._lastHash) return;
+        this._lastHash = hash;
+
         const wasAtBottom = this._isScrolledToBottom();
+        const frag = document.createDocumentFragment();
 
-        this.messagesEl.innerHTML = `<div class="ag-content">${html}</div>`;
+        for (const msg of messages) {
+            const el = this._renderMessage(msg);
+            if (el) frag.appendChild(el);
+        }
 
-        // 스크롤 유지
-        if (wasAtBottom) {
-            this._scrollToBottom();
+        this.messagesEl.innerHTML = '';
+        this.messagesEl.appendChild(frag);
+
+        if (wasAtBottom) this._scrollToBottom();
+    }
+
+    /**
+     * 메시지 타입별 렌더러
+     */
+    _renderMessage(msg) {
+        switch (msg.type) {
+            case 'task': return this._renderTask(msg);
+            case 'text': return this._renderText(msg);
+            case 'thought': return this._renderThought(msg);
+            case 'code': return this._renderCode(msg);
+            case 'image': return this._renderImage(msg);
+            case 'actions': return this._renderActions(msg);
+            default: return null;
         }
     }
 
     /**
-     * 세션 상태 업데이트
+     * 작업 카드 — Antigravity의 task boundary 카드
      */
+    _renderTask(msg) {
+        const card = document.createElement('div');
+        card.className = 'msg-card';
+
+        // 헤더
+        const header = document.createElement('div');
+        header.className = 'msg-card-header';
+
+        const toggle = document.createElement('span');
+        toggle.className = 'msg-toggle';
+        toggle.textContent = msg.collapsed ? '▸' : '▾';
+
+        const title = document.createElement('span');
+        title.className = 'msg-card-title';
+        title.textContent = msg.title || 'Task';
+
+        header.appendChild(toggle);
+        header.appendChild(title);
+
+        // 요약
+        if (msg.summary) {
+            const summary = document.createElement('div');
+            summary.className = 'msg-card-summary';
+            summary.textContent = msg.summary;
+            header.appendChild(summary);
+        }
+
+        card.appendChild(header);
+
+        // 하위 항목
+        if (msg.steps && msg.steps.length > 0) {
+            const body = document.createElement('div');
+            body.className = 'msg-card-body';
+            if (msg.collapsed) body.style.display = 'none';
+
+            for (const step of msg.steps) {
+                const row = document.createElement('div');
+                row.className = 'msg-step';
+
+                const icon = document.createElement('span');
+                icon.className = 'msg-step-icon';
+                icon.textContent = step.icon || '•';
+
+                const text = document.createElement('span');
+                text.className = 'msg-step-text';
+                text.textContent = step.text;
+
+                row.appendChild(icon);
+                row.appendChild(text);
+                body.appendChild(row);
+            }
+
+            card.appendChild(body);
+
+            // 접기/펴기 토글
+            header.style.cursor = 'pointer';
+            header.addEventListener('click', () => {
+                const isHidden = body.style.display === 'none';
+                body.style.display = isHidden ? '' : 'none';
+                toggle.textContent = isHidden ? '▾' : '▸';
+            });
+        }
+
+        return card;
+    }
+
+    /**
+     * 텍스트 메시지 — 마크다운 렌더링
+     */
+    _renderText(msg) {
+        const div = document.createElement('div');
+        div.className = 'msg-text';
+
+        if (msg.html) {
+            // Antigravity에서 가져온 렌더링된 HTML (sanitized subset)
+            div.innerHTML = this._sanitizeHtml(msg.html);
+        } else {
+            div.textContent = msg.content || '';
+        }
+
+        return div;
+    }
+
+    /**
+     * Thought Process — 접을 수 있는 블록
+     */
+    _renderThought(msg) {
+        const div = document.createElement('div');
+        div.className = 'msg-thought';
+
+        const btn = document.createElement('button');
+        btn.className = 'msg-thought-btn';
+        btn.innerHTML = `<span class="msg-thought-icon">💭</span> ${this._escapeHtml(msg.label || 'Thought')}`;
+
+        div.appendChild(btn);
+        return div;
+    }
+
+    /**
+     * 코드 블록
+     */
+    _renderCode(msg) {
+        const wrapper = document.createElement('div');
+        wrapper.className = 'msg-code-block';
+
+        if (msg.language) {
+            const lang = document.createElement('div');
+            lang.className = 'msg-code-lang';
+            lang.textContent = msg.language;
+            wrapper.appendChild(lang);
+        }
+
+        const pre = document.createElement('pre');
+        const code = document.createElement('code');
+        code.textContent = msg.content || '';
+        pre.appendChild(code);
+        wrapper.appendChild(pre);
+
+        return wrapper;
+    }
+
+    /**
+     * 이미지 — 크기 제한 적용
+     */
+    _renderImage(msg) {
+        const div = document.createElement('div');
+        div.className = 'msg-image';
+
+        const img = document.createElement('img');
+        img.src = msg.src;
+        img.alt = msg.alt || '';
+        img.loading = 'lazy';
+        // 최대 크기 제한
+        img.style.maxWidth = '320px';
+        img.style.maxHeight = '200px';
+
+        div.appendChild(img);
+        return div;
+    }
+
+    /**
+     * 액션 버튼 영역
+     */
+    _renderActions(msg) {
+        const div = document.createElement('div');
+        div.className = 'msg-actions';
+
+        for (const btn of (msg.buttons || [])) {
+            const el = document.createElement('button');
+            el.className = 'msg-action-btn';
+            el.textContent = btn.label || btn;
+
+            // Proceed/Review 등 주요 액션은 강조
+            const label = btn.label || btn;
+            if (['Proceed', 'Approve', 'Accept', 'Yes', 'Allow'].some(k => label.includes(k))) {
+                el.classList.add('msg-action-primary');
+            }
+
+            // 좌표가 있으면 클릭 가능
+            if (btn.x && btn.y) {
+                el.style.cursor = 'pointer';
+                el.addEventListener('click', () => {
+                    if (this.onActionClick) {
+                        this.onActionClick({ label: btn.label, x: btn.x, y: btn.y });
+                    }
+                });
+            }
+
+            div.appendChild(el);
+        }
+
+        return div;
+    }
+
+    /**
+     * HTML sanitize (간단히 위험 태그 제거)
+     */
+    _sanitizeHtml(html) {
+        // script, iframe, object, embed, on* 속성 제거
+        return html
+            .replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi, '')
+            .replace(/<iframe\b[^>]*>[\s\S]*?<\/iframe>/gi, '')
+            .replace(/<object\b[^>]*>[\s\S]*?<\/object>/gi, '')
+            .replace(/<embed\b[^>]*>/gi, '')
+            .replace(/\bon\w+\s*=\s*"[^"]*"/gi, '')
+            .replace(/\bon\w+\s*=\s*'[^']*'/gi, '')
+            // 이미지 크기 제한 인라인 추가
+            .replace(/<img\b/gi, '<img style="max-width:320px;max-height:200px;border-radius:8px;" ');
+    }
+
+    _escapeHtml(str) {
+        const div = document.createElement('div');
+        div.textContent = str;
+        return div.innerHTML;
+    }
+
     updateSessionStatus(status) {
         if (!this.activeSession) return;
-
         const statusText = {
             connected: '● 연결됨',
             disconnected: '○ 연결 끊김',
             error: '⚠ 오류',
         };
-
         this.sessionStatusEl.textContent = statusText[status] || status;
     }
 
diff --git a/server/cdp-client.js b/server/cdp-client.js
index 03f4bd5..745a499 100644
--- a/server/cdp-client.js
+++ b/server/cdp-client.js
@@ -95,9 +95,17 @@ class CDPClient {
   }
 
   /**
-   * 채팅 영역의 DOM을 스크래핑
+   * 채팅 영역의 DOM을 구조화된 JSON으로 추출
    * 
-   * Antigravity의 에이전트 사이드 패널에서 대화 내용을 추출
+   * Antigravity DOM을 순회하여 메시지 블록을 타입별로 분류:
+   * - task: 작업 카드 (접기/펼치기 가능한 그룹)
+   * - text: 마크다운 텍스트
+   * - thought: Thought Process 블록
+   * - tool: 도구 호출/결과
+   * - code: 코드 블록
+   * - image: 이미지
+   * - user: 사용자 메시지
+   * - status: 상태 표시 (진행 중 등)
    */
   async scrapeChatDOM() {
     if (!this.connected || !this.client) return null;
@@ -106,29 +114,168 @@ class CDPClient {
       const { result } = await this.client.Runtime.evaluate({
         expression: `
           (function() {
-            // Antigravity 실제 DOM 셀렉터 (우선순위 순)
-            const selectors = [
-              '#conversation',
-              '.antigravity-agent-side-panel',
-            ];
-            
-            for (const sel of selectors) {
-              const el = document.querySelector(sel);
-              if (el) {
-                return el.innerHTML;
+            const conv = document.querySelector('#conversation');
+            if (!conv) return JSON.stringify([]);
+
+            const scrollEl = conv.querySelector('.overflow-y-auto');
+            if (!scrollEl) return JSON.stringify([]);
+
+            const messages = [];
+
+            // 뷰포트에 실제 렌더링된 최상위 컨테이너 찾기
+            const topContainer = scrollEl.querySelector('.mx-auto.w-full > div > div');
+            if (!topContainer) return JSON.stringify([]);
+
+            // 각 turn(대화 턴)을 순회
+            const turns = topContainer.children;
+            for (let i = 0; i < turns.length; i++) {
+              const turn = turns[i];
+              
+              // placeholder 블록 건너뛰기 (가상 스크롤)
+              const isPlaceholder = turn.children.length > 0 && 
+                Array.from(turn.children).every(c => 
+                  c.classList.contains('rounded-lg') && 
+                  c.classList.contains('bg-gray-500/10') &&
+                  c.textContent.trim() === ''
+                );
+              if (isPlaceholder) continue;
+
+              // 턴 내부의 각 메시지 블록 순회
+              const blocks = turn.querySelectorAll(':scope > *');
+              for (const block of blocks) {
+                // placeholder 개별 블록도 건너뛰기
+                if (block.classList.contains('bg-gray-500/10') && block.textContent.trim() === '') continue;
+
+                // --- 작업 카드 (task boundary) ---
+                const taskCard = block.querySelector('.isolate');
+                if (taskCard || block.classList.contains('isolate')) {
+                  const card = taskCard || block;
+                  const titleEl = card.querySelector('.font-semibold');
+                  const summaryEl = card.querySelector('.text-sm .leading-relaxed');
+                  const expanded = card.querySelector('[aria-expanded]');
+                  
+                  // 하위 항목들 추출
+                  const steps = [];
+                  card.querySelectorAll('.flex.items-center.gap-2, .flex.w-full.items-center.gap-2').forEach(step => {
+                    const txt = step.textContent.trim();
+                    if (txt && txt.length > 2) {
+                      const svg = step.querySelector('svg');
+                      let icon = '';
+                      if (svg) {
+                        const cls = svg.getAttribute('class') || '';
+                        if (cls.includes('check')) icon = '✓';
+                        else if (cls.includes('loader') || cls.includes('spin')) icon = '⟳';
+                        else if (cls.includes('x-circle') || cls.includes('alert')) icon = '⚠';
+                      }
+                      steps.push({ icon, text: txt.substring(0, 200) });
+                    }
+                  });
+
+                  messages.push({
+                    type: 'task',
+                    title: titleEl ? titleEl.textContent.trim() : '',
+                    summary: summaryEl ? summaryEl.textContent.trim().substring(0, 500) : '',
+                    collapsed: expanded ? expanded.getAttribute('aria-expanded') === 'false' : true,
+                    steps: steps.slice(0, 20),
+                  });
+                  continue;
+                }
+
+                // --- Thought Process ---
+                const thoughtBtn = block.querySelector('button');
+                if (thoughtBtn && thoughtBtn.textContent.includes('Thought for')) {
+                  messages.push({
+                    type: 'thought',
+                    label: thoughtBtn.textContent.trim(),
+                    collapsed: true,
+                  });
+                  continue;
+                }
+
+                // --- 코드 블록 ---
+                const pre = block.querySelector('pre');
+                if (pre && !block.querySelector('.isolate')) {
+                  const codeEl = pre.querySelector('code');
+                  const lang = codeEl ? (codeEl.className.match(/language-(\\w+)/) || [])[1] || '' : '';
+                  messages.push({
+                    type: 'code',
+                    language: lang,
+                    content: (codeEl || pre).textContent.substring(0, 2000),
+                  });
+                  continue;
+                }
+
+                // --- 이미지 ---
+                const img = block.querySelector('img');
+                if (img && img.src) {
+                  messages.push({
+                    type: 'image',
+                    src: img.src,
+                    alt: img.alt || '',
+                    width: img.naturalWidth || img.width || 200,
+                    height: img.naturalHeight || img.height || 150,
+                  });
+                  continue;
+                }
+
+                // --- 버튼 영역 (Proceed, Cancel 등) ---
+                const actionBtns = block.querySelectorAll('button');
+                if (actionBtns.length > 0) {
+                  const actionKeywords = ['Proceed','Cancel','Open','View','Review','Approve','Reject','Yes','No','Accept','Deny','Allow','Skip'];
+                  const buttons = Array.from(actionBtns).map(b => {
+                    const label = b.textContent.trim();
+                    const rect = b.getBoundingClientRect();
+                    return {
+                      label,
+                      x: Math.round(rect.left + rect.width / 2),
+                      y: Math.round(rect.top + rect.height / 2),
+                      w: Math.round(rect.width),
+                      h: Math.round(rect.height),
+                    };
+                  }).filter(b => b.label && b.w > 0);
+
+                  if (buttons.length > 0 && buttons.some(b => actionKeywords.some(k => b.label.includes(k)))) {
+                    messages.push({
+                      type: 'actions',
+                      buttons: buttons.slice(0, 8),
+                    });
+                    continue;
+                  }
+                }
+
+                // --- 일반 텍스트 ---
+                const text = block.textContent.trim();
+                if (text.length > 0) {
+                  // CSS 코드나 내부 스타일은 건너뛰기
+                  if (text.startsWith('/*') || text.startsWith('@media') || text.startsWith('.') && text.includes('{')) continue;
+
+                  // leading-relaxed select-text → 마크다운 렌더링 텍스트
+                  const mkEl = block.querySelector('.leading-relaxed.select-text');
+                  const htmlContent = mkEl ? mkEl.innerHTML : block.innerHTML;
+                  
+                  messages.push({
+                    type: 'text',
+                    content: text.substring(0, 3000),
+                    html: htmlContent.substring(0, 5000),
+                  });
+                }
               }
             }
             
-            return '<!-- agent chat panel not found -->';
+            return JSON.stringify(messages);
           })()
         `,
         returnByValue: true,
       });
 
-      return result.value || null;
+      try {
+        return JSON.parse(result.value) || [];
+      } catch {
+        return [];
+      }
     } catch (err) {
       console.error('[CDP] 채팅 스크래핑 오류:', err.message);
-      return null;
+      return [];
     }
   }
 
diff --git a/server/index.js b/server/index.js
index 7083873..62e9f79 100644
--- a/server/index.js
+++ b/server/index.js
@@ -179,6 +179,30 @@ async function handleWsMessage(ws, msg) {
             break;
         }
 
+        case 'click_action': {
+            // 채팅 탭에서 Proceed/Cancel 등 버튼 클릭
+            const session = sessionManager.getSession(msg.sessionId || state.activeSessionId);
+            if (!session) {
+                ws.send(JSON.stringify({ type: 'error', message: '활성 세션 없음' }));
+                return;
+            }
+
+            const { x, y } = msg;
+            try {
+                // mousePressed + mouseReleased = 클릭
+                await session.client.dispatchInput({
+                    type: 'mouse', action: 'mousePressed', x, y, button: 'left', clickCount: 1,
+                });
+                await session.client.dispatchInput({
+                    type: 'mouse', action: 'mouseReleased', x, y, button: 'left', clickCount: 1,
+                });
+                ws.send(JSON.stringify({ type: 'action_clicked', success: true, label: msg.label }));
+            } catch (err) {
+                ws.send(JSON.stringify({ type: 'error', message: `버튼 클릭 실패: ${err.message}` }));
+            }
+            break;
+        }
+
         default:
             ws.send(JSON.stringify({ type: 'error', message: `알 수 없는 메시지 타입: ${msg.type}` }));
     }
@@ -188,12 +212,12 @@ async function handleWsMessage(ws, msg) {
  * 특정 세션의 CDP 채팅 폴링을 시작하고 결과를 ws 클라이언트에 전송
  */
 function startSessionPolling(session, ws) {
-    session.client.onChatUpdate = (html) => {
+    session.client.onChatUpdate = (messages) => {
         if (ws.readyState === WebSocket.OPEN) {
             ws.send(JSON.stringify({
                 type: 'chat_update',
                 sessionId: session.id,
-                html: html,
+                messages: messages,
                 timestamp: Date.now(),
             }));
         }