diff --git a/src/config/settings.ts b/src/config/settings.ts
index 15ce17d..442ebc3 100644
--- a/src/config/settings.ts
+++ b/src/config/settings.ts
@@ -1,9 +1,15 @@
 /**
  * 配置管理
- * 后端地址已预配置，用户无需手动设置
+ * 支持 dev（本地开发）和 test（测试服务器）两种环境
  */
 import * as vscode from "vscode";
 
+/** 环境类型 */
+type Environment = "dev" | "test" | "prod";
+
+/** 当前环境 - 修改这里切换环境 */
+const CURRENT_ENV: Environment = "dev";
+
 /** 配置项接口 */
 export interface IccoderConfig {
   /** 后端服务地址 */
@@ -14,19 +20,40 @@ export interface IccoderConfig {
   userId: string;
 }
 
-/** 默认配置（预配置，不暴露给用户） */
-const DEFAULT_CONFIG: IccoderConfig = {
-  backendUrl: "http://192.168.1.108:2233",
-  timeout: 60000,
-  userId: "default-user",
+/** 环境配置 */
+const ENV_CONFIG: Record<Environment, IccoderConfig> = {
+  /** 本地开发环境 */
+  dev: {
+    backendUrl: "http://localhost:2233",
+    timeout: 60000,
+    userId: "default-user",
+  },
+  /** 测试服务器环境 */
+  test: {
+    backendUrl: "http://192.168.1.108:2233",
+    timeout: 60000,
+    userId: "default-user",
+  },
+  /** 生产环境 */
+  prod: {
+    backendUrl: "https://api.iccoder.com",  // TODO: 替换为实际生产地址
+    timeout: 60000,
+    userId: "default-user",
+  },
 };
 
+/**
+ * 获取当前环境
+ */
+export function getCurrentEnv(): Environment {
+  return CURRENT_ENV;
+}
+
 /**
  * 获取配置项
- * 直接返回预配置的值，用户无需手动配置
  */
 export function getConfig(): IccoderConfig {
-  return { ...DEFAULT_CONFIG };
+  return { ...ENV_CONFIG[CURRENT_ENV] };
 }
 
 /**
@@ -34,7 +61,6 @@ export function getConfig(): IccoderConfig {
  */
 export function getApiUrl(path: string): string {
   const { backendUrl } = getConfig();
-  // 确保 URL 格式正确
   const baseUrl = backendUrl.endsWith("/")
     ? backendUrl.slice(0, -1)
     : backendUrl;
diff --git a/src/panels/ICHelperPanel.ts b/src/panels/ICHelperPanel.ts
index 7d9c114..df0a0b0 100644
--- a/src/panels/ICHelperPanel.ts
+++ b/src/panels/ICHelperPanel.ts
@@ -12,7 +12,9 @@ import {
   handlePlanAction,
   setPendingPlanExecution,
   getCurrentTaskId,
+  setLastTaskId,
 } from "../utils/messageHandler";
+import { compactDialog } from "../services/apiClient";
 import { VCDViewerPanel } from "./VCDViewerPanel";
 import { ChatHistoryManager } from "../utils/chatHistoryManager";
 import { MessageType } from "../types/chatHistory";
@@ -193,7 +195,40 @@ export async function showICHelperPanel(
           break;
         // 新增：中止对话
         case "abortDialog":
-          abortCurrentDialog();
+          void abortCurrentDialog();
+          break;
+        // 新增：压缩会话
+        case "compressConversation":
+          {
+            const taskId = getCurrentTaskId();
+            if (taskId) {
+              compactDialog(taskId)
+                .then((result) => {
+                  if (result.success) {
+                    panel.webview.postMessage({
+                      command: "receiveMessage",
+                      text: "✅ 会话压缩完成",
+                    });
+                  } else {
+                    panel.webview.postMessage({
+                      command: "receiveMessage",
+                      text: `❌ 压缩失败: ${result.error || "未知错误"}`,
+                    });
+                  }
+                })
+                .catch((err) => {
+                  panel.webview.postMessage({
+                    command: "receiveMessage",
+                    text: `❌ 压缩失败: ${err.message || "网络错误"}`,
+                  });
+                });
+            } else {
+              panel.webview.postMessage({
+                command: "receiveMessage",
+                text: "❌ 没有活跃的会话",
+              });
+            }
+          }
           break;
         // 处理计划操作（只做模式切换，响应已通过 submitAnswer 发送）
         case "planAction":
@@ -528,6 +563,9 @@ async function selectConversation(
       return;
     }
 
+    // 设置 lastTaskId，用于压缩等操作
+    setLastTaskId(taskId);
+
     // 更新面板的任务映射，确保后续对话保存到正确的任务中
     const panelId = (panel as any).__uniqueId;
     historyManager.setPanelTask(panelId, taskId, workspacePath);
diff --git a/src/services/apiClient.ts b/src/services/apiClient.ts
index b8ab7b1..bbc312d 100644
--- a/src/services/apiClient.ts
+++ b/src/services/apiClient.ts
@@ -126,6 +126,55 @@ export async function healthCheck(): Promise<{ status: string }> {
   });
 }
 
+/**
+ * 停止对话请求
+ */
+export interface StopDialogRequest {
+  taskId: string;
+}
+
+/**
+ * 停止对话响应
+ */
+export interface StopDialogResponse {
+  success: boolean;
+  taskId: string;
+  message?: string;
+  error?: string;
+}
+
+/**
+ * 停止对话
+ * POST /api/dialog/stop
+ */
+export async function stopDialog(taskId: string): Promise<StopDialogResponse> {
+  console.log(`[API] 停止对话: taskId=${taskId}`);
+  return request<StopDialogResponse>('/api/dialog/stop', {
+    method: 'POST',
+    body: { taskId }
+  });
+}
+
+/** 压缩对话响应 */
+export interface CompactDialogResponse {
+  success: boolean;
+  taskId: string;
+  message?: string;
+  error?: string;
+}
+
+/**
+ * 手动压缩对话历史
+ * POST /api/dialog/compact
+ */
+export async function compactDialog(taskId: string): Promise<CompactDialogResponse> {
+  console.log(`[API] 压缩对话: taskId=${taskId}`);
+  return request<CompactDialogResponse>('/api/dialog/compact', {
+    method: 'POST',
+    body: { taskId }
+  });
+}
+
 /**
  * 创建成功的工具结果
  */
diff --git a/src/services/dialogService.ts b/src/services/dialogService.ts
index 4d304f7..3f6b6ca 100644
--- a/src/services/dialogService.ts
+++ b/src/services/dialogService.ts
@@ -3,12 +3,15 @@
  * 整合 SSE 通信、工具执行、用户交互
  */
 import * as vscode from 'vscode';
+import * as fs from 'fs';
+import * as path from 'path';
 import { startStreamDialog, generateTaskId, SSEController, SSECallbacks } from './sseHandler';
 import { executeToolCall, createToolExecutorContext, ToolExecutorContext } from './toolExecutor';
 import { userInteractionManager } from './userInteraction';
 import { getConfig } from '../config/settings';
 import type { DialogRequest, ToolCallRequest, AskUserEvent, RunMode, ToolConfirmEvent, PlanConfirmEvent } from '../types/api';
-import { submitToolConfirm, submitAnswer } from './apiClient';
+import { submitToolConfirm, submitAnswer, stopDialog } from './apiClient';
+import { ChatHistoryManager } from '../utils/chatHistoryManager';
 
 /**
  * 消息段落类型
@@ -70,6 +73,8 @@ export interface DialogCallbacks {
   onError?: (message: string) => void;
   /** 通知消息 */
   onNotification?: (message: string) => void;
+  /** 上下文使用量更新 */
+  onContextUsage?: (data: { currentTokens: number; maxTokens: number; percentage: number }) => void;
 }
 
 /**
@@ -152,6 +157,120 @@ export class DialogSession {
     return this.isActive;
   }
 
+  /**
+   * 加载知识图谱数据
+   * 从 .iccoder/knowledge.json 读取
+   */
+  private async loadKnowledgeData(): Promise<string | null> {
+    console.log('[DialogSession] loadKnowledgeData 开始执行');
+
+    // 等待 workspaceFolders 就绪（首次打开窗口/首次触发命令时可能为空）
+    const workspaceFolders = await this.waitForWorkspaceFolders();
+    if (!workspaceFolders || workspaceFolders.length === 0) {
+      console.log('[DialogSession] 没有工作区文件夹');
+      return null;
+    }
+
+    // 多根工作区场景：优先读取实际存在 knowledge.json 的根目录
+    for (const folder of this.getWorkspaceFolderCandidates(workspaceFolders)) {
+      const knowledgeUri = vscode.Uri.joinPath(folder.uri, '.iccoder', 'knowledge.json');
+      console.log('[DialogSession] 知识图谱 URI:', knowledgeUri.toString());
+
+      try {
+        const content = await this.readTextFileWithRetry(knowledgeUri, 5);
+        if (!content) {
+          continue;
+        }
+
+        // 基础校验 + 清洗：避免偶发读取到半截内容导致后端反序列化失败
+        try {
+          const parsed = JSON.parse(content) as any;
+
+          // 兼容：后端 KnowledgeGraph.isEmpty() 可能被序列化为 "empty"，老后端反序列化会失败
+          if (parsed && typeof parsed === 'object' && 'empty' in parsed) {
+            delete parsed.empty;
+          }
+
+          const sanitized = JSON.stringify(parsed);
+          console.log('[DialogSession] 知识图谱已清洗, sanitizedLen:', sanitized.length);
+          return sanitized;
+        } catch (e) {
+          console.warn('[DialogSession] 知识图谱 JSON 解析失败，跳过本次读取:', e);
+          continue;
+        }
+      } catch (error) {
+        console.warn('[DialogSession] 加载知识图谱失败:', error);
+      }
+    }
+
+    return null;
+  }
+
+  private async waitForWorkspaceFolders(): Promise<readonly vscode.WorkspaceFolder[] | undefined> {
+    for (let i = 0; i < 10; i++) {
+      const folders = vscode.workspace.workspaceFolders;
+      if (folders && folders.length > 0) {
+        return folders;
+      }
+      await new Promise(resolve => setTimeout(resolve, 100));
+    }
+    return vscode.workspace.workspaceFolders;
+  }
+
+  private getWorkspaceFolderCandidates(
+    workspaceFolders: readonly vscode.WorkspaceFolder[]
+  ): vscode.WorkspaceFolder[] {
+    const result: vscode.WorkspaceFolder[] = [];
+
+    // 1) 当前激活文件所在的 workspace folder（如果有）
+    const activeUri = vscode.window.activeTextEditor?.document?.uri;
+    const activeFolder = activeUri ? vscode.workspace.getWorkspaceFolder(activeUri) : undefined;
+    if (activeFolder) {
+      result.push(activeFolder);
+    }
+
+    // 2) 其它 workspace folders（去重）
+    for (const folder of workspaceFolders) {
+      if (!result.some(f => f.uri.toString() === folder.uri.toString())) {
+        result.push(folder);
+      }
+    }
+
+    return result;
+  }
+
+  private async readTextFileWithRetry(uri: vscode.Uri, maxAttempts: number): Promise<string | null> {
+    for (let attempt = 1; attempt <= maxAttempts; attempt++) {
+      try {
+        const bytes = await vscode.workspace.fs.readFile(uri);
+        const text = Buffer.from(bytes).toString('utf-8');
+        if (!text || !text.trim()) {
+          return null;
+        }
+        return text;
+      } catch (error) {
+        // 文件不存在：不是错误，直接返回 null
+        if (error instanceof vscode.FileSystemError && error.code === 'FileNotFound') {
+          return null;
+        }
+
+        const retryable =
+          (error instanceof vscode.FileSystemError && error.code === 'Unavailable') ||
+          (typeof (error as any)?.code === 'string' && ['EBUSY', 'EPERM', 'EACCES'].includes((error as any).code));
+
+        if (!retryable || attempt >= maxAttempts) {
+          throw error;
+        }
+
+        const delayMs = 50 * attempt;
+        console.log(`[DialogSession] 读取知识图谱失败（可重试）: attempt=${attempt}/${maxAttempts}, delay=${delayMs}ms`);
+        await new Promise(resolve => setTimeout(resolve, delayMs));
+      }
+    }
+
+    return null;
+  }
+
   /**
    * 获取工具操作描述（用于确认对话框）
    */
@@ -210,13 +329,29 @@ export class DialogSession {
     this.currentTextSegment = null;
 
     const config = getConfig();
+
+    // 获取压缩数据和新消息（用于后端重启后恢复）
+    const historyManager = ChatHistoryManager.getInstance();
+    const compactedData = await historyManager.loadCompactedData(this.taskId);
+    const newMessages = historyManager.getNewMessagesSinceCompaction();
+
+    // 加载知识图谱数据
+    const knowledgeData = await this.loadKnowledgeData();
+    console.log('[DialogSession] knowledgeData 加载结果:', knowledgeData ? `${knowledgeData.length} 字符` : 'null');
+
     const request: DialogRequest = {
       taskId: this.taskId,
       message,
       userId: config.userId,
-      mode: mode || 'agent'
+      mode: mode || 'agent',
+      compactedData: compactedData || undefined,
+      newMessages: newMessages.length > 0 ? newMessages : undefined,
+      knowledgeData: knowledgeData || undefined
     };
 
+    // 追踪用户消息
+    historyManager.trackUserMessage(message);
+
     const sseCallbacks: SSECallbacks = {
       onTextDelta: (data) => {
         this.accumulatedText += data.text;
@@ -420,6 +555,12 @@ export class DialogSession {
       onComplete: (data) => {
         this.isActive = false;
         this.finalizeTextSegment();
+
+        // 追踪 AI 消息（用于后端重启后恢复）
+        if (this.accumulatedText) {
+          historyManager.trackAiMessage(this.accumulatedText);
+        }
+
         // 发送所有段落
         callbacks.onComplete?.(this.segments);
       },
@@ -500,6 +641,17 @@ export class DialogSession {
         }
       },
 
+      onMemoryCompacted: async (data) => {
+        console.log('[DialogSession] onMemoryCompacted:', data.taskId);
+        // 保存压缩数据到本地
+        await historyManager.saveCompactedData(data.compactedData);
+      },
+
+      onContextUsage: (data) => {
+        console.log('[DialogSession] onContextUsage:', data.currentTokens, '/', data.maxTokens);
+        callbacks.onContextUsage?.(data);
+      },
+
       onOpen: () => {
         console.log('[DialogSession] SSE 连接已建立');
       },
@@ -530,6 +682,25 @@ export class DialogSession {
     }
     this.isActive = false;
     userInteractionManager.cancelAll();
+
+    // 通知后端停止处理
+    stopDialog(this.taskId).catch(err => {
+      console.warn('[DialogSession] 停止对话请求失败:', err);
+    });
+  }
+
+  /**
+   * 获取当前的消息段落（用于中止时保存）
+   */
+  getSegments(): MessageSegment[] {
+    return this.segments;
+  }
+
+  /**
+   * 获取累积的文本内容
+   */
+  getAccumulatedText(): string {
+    return this.accumulatedText;
   }
 
   /**
diff --git a/src/services/sseHandler.ts b/src/services/sseHandler.ts
index d150c1f..d2c94bf 100644
--- a/src/services/sseHandler.ts
+++ b/src/services/sseHandler.ts
@@ -27,8 +27,10 @@ import type {
   AgentStartEvent,
   AgentProgressEvent,
   AgentCompleteEvent,
-  AgentErrorEvent
+  AgentErrorEvent,
+  ContextUsageEvent
 } from '../types/api';
+import type { MemoryCompactedEvent } from '../types/memory';
 
 /**
  * SSE 事件回调接口
@@ -68,6 +70,10 @@ export interface SSECallbacks {
   onAgentComplete?: (data: AgentCompleteEvent) => void;
   /** 子智能体错误 */
   onAgentError?: (data: AgentErrorEvent) => void;
+  /** 记忆压缩完成 */
+  onMemoryCompacted?: (data: MemoryCompactedEvent) => void;
+  /** 上下文使用量更新 */
+  onContextUsage?: (data: ContextUsageEvent) => void;
   /** 连接打开 */
   onOpen?: () => void;
   /** 连接关闭 */
@@ -319,6 +325,12 @@ function dispatchEvent(
     case 'agent_error':
       callbacks.onAgentError?.(data as AgentErrorEvent);
       break;
+    case 'memory_compacted':
+      callbacks.onMemoryCompacted?.(data as MemoryCompactedEvent);
+      break;
+    case 'context_usage':
+      callbacks.onContextUsage?.(data as ContextUsageEvent);
+      break;
     default:
       console.log(`[SSE] 未知事件类型: ${eventType}`, data);
   }
diff --git a/src/services/toolExecutor.ts b/src/services/toolExecutor.ts
index 51edda2..824a6b0 100644
--- a/src/services/toolExecutor.ts
+++ b/src/services/toolExecutor.ts
@@ -313,22 +313,19 @@ async function executeWaveformSummary(args: WaveformSummaryArgs): Promise<string
  * 保存知识图谱到 .iccoder/knowledge.json
  */
 async function executeKnowledgeSave(args: KnowledgeSaveArgs): Promise<string> {
-  const workspaceFolders = vscode.workspace.workspaceFolders;
-  if (!workspaceFolders || workspaceFolders.length === 0) {
+  const workspaceFolder = getWorkspaceFolder();
+  if (!workspaceFolder) {
     throw new Error('请先打开一个工作区');
   }
 
-  const workspacePath = workspaceFolders[0].uri.fsPath;
-  const iccoderDir = path.join(workspacePath, '.iccoder');
-  const knowledgePath = path.join(iccoderDir, 'knowledge.json');
+  const iccoderDirUri = vscode.Uri.joinPath(workspaceFolder.uri, '.iccoder');
+  const knowledgeUri = vscode.Uri.joinPath(iccoderDirUri, 'knowledge.json');
 
-  // 确保 .iccoder 目录存在
-  if (!fs.existsSync(iccoderDir)) {
-    fs.mkdirSync(iccoderDir, { recursive: true });
-  }
+  // 确保 .iccoder 目录存在（兼容远程/虚拟工作区）
+  await vscode.workspace.fs.createDirectory(iccoderDirUri);
 
-  // 写入知识图谱
-  fs.writeFileSync(knowledgePath, args.data, 'utf-8');
+  // 写入知识图谱（UTF-8）
+  await vscode.workspace.fs.writeFile(knowledgeUri, Buffer.from(args.data || '', 'utf-8'));
 
   return `知识图谱已保存: .iccoder/knowledge.json`;
 }
@@ -338,21 +335,36 @@ async function executeKnowledgeSave(args: KnowledgeSaveArgs): Promise<string> {
  * 从 .iccoder/knowledge.json 加载知识图谱
  */
 async function executeKnowledgeLoad(): Promise<string> {
-  const workspaceFolders = vscode.workspace.workspaceFolders;
-  if (!workspaceFolders || workspaceFolders.length === 0) {
+  const workspaceFolder = getWorkspaceFolder();
+  if (!workspaceFolder) {
     throw new Error('请先打开一个工作区');
   }
 
-  const workspacePath = workspaceFolders[0].uri.fsPath;
-  const knowledgePath = path.join(workspacePath, '.iccoder', 'knowledge.json');
+  const knowledgeUri = vscode.Uri.joinPath(workspaceFolder.uri, '.iccoder', 'knowledge.json');
 
-  // 如果文件不存在，返回空图谱
-  if (!fs.existsSync(knowledgePath)) {
-    return JSON.stringify({ directed: true, nodes: [], links: [] });
+  try {
+    const bytes = await vscode.workspace.fs.readFile(knowledgeUri);
+    const content = Buffer.from(bytes).toString('utf-8');
+    return content;
+  } catch (error) {
+    // 文件不存在：返回空图谱
+    if (error instanceof vscode.FileSystemError && error.code === 'FileNotFound') {
+      // 与后端 KnowledgeGraph 结构保持一致（nodes/edges + nodeClass 多态字段）
+      return JSON.stringify({ taskId: '', version: 1, module: null, nodes: [], edges: [] });
+    }
+    throw error;
+  }
+}
+
+function getWorkspaceFolder(): vscode.WorkspaceFolder | undefined {
+  const folders = vscode.workspace.workspaceFolders;
+  if (!folders || folders.length === 0) {
+    return undefined;
   }
 
-  const content = fs.readFileSync(knowledgePath, 'utf-8');
-  return content;
+  const activeUri = vscode.window.activeTextEditor?.document?.uri;
+  const activeFolder = activeUri ? vscode.workspace.getWorkspaceFolder(activeUri) : undefined;
+  return activeFolder ?? folders[0];
 }
 
 /**
diff --git a/src/services/userInteraction.ts b/src/services/userInteraction.ts
index 0879224..a5fea5a 100644
--- a/src/services/userInteraction.ts
+++ b/src/services/userInteraction.ts
@@ -32,6 +32,13 @@ export class UserInteractionManager {
     this.webviewPanel = panel;
   }
 
+  /**
+   * 获取 WebView 面板
+   */
+  getWebviewPanel(): vscode.WebviewPanel | null {
+    return this.webviewPanel;
+  }
+
   /**
    * 处理 ask_user 事件
    * @param event ask_user 事件数据
@@ -60,13 +67,13 @@ export class UserInteractionManager {
         reject
       });
 
-      // 设置超时（5分钟）
+      // 设置超时（2小时）
       setTimeout(() => {
         if (this.pendingQuestions.has(askId)) {
           this.pendingQuestions.delete(askId);
           reject(new Error('用户回答超时'));
         }
-      }, 300000);
+      }, 7200000);
     });
   }
 
diff --git a/src/types/api.ts b/src/types/api.ts
index 7f3d227..991f300 100644
--- a/src/types/api.ts
+++ b/src/types/api.ts
@@ -3,6 +3,8 @@
  * 对应后端 IC Coder Backend 的接口格式
  */
 
+import { CompactedMemory, CompactedMessage } from './memory';
+
 // ============== 对话请求/响应 ==============
 
 /**
@@ -27,6 +29,12 @@ export interface DialogRequest {
   userId: string;
   /** 运行模式 */
   mode: RunMode;
+  /** 压缩后的记忆数据（用于后端重启后恢复） */
+  compactedData?: CompactedMemory;
+  /** 压缩后产生的新消息 */
+  newMessages?: CompactedMessage[];
+  /** 知识图谱数据（JSON 字符串，用于恢复知识图谱） */
+  knowledgeData?: string;
 }
 
 // ============== SSE 事件类型 ==============
@@ -45,6 +53,8 @@ export type SSEEventType =
   | 'agent_progress'  // 子智能体进度
   | 'agent_complete'  // 子智能体完成
   | 'agent_error'     // 子智能体错误
+  | 'memory_compacted' // 记忆压缩完成
+  | 'context_usage'   // 上下文使用量
   | 'complete'        // 对话完成
   | 'error'           // 错误
   | 'warning'         // 警告
@@ -172,6 +182,13 @@ export interface AgentErrorEvent {
   timestamp: number;
 }
 
+/** context_usage 事件数据 */
+export interface ContextUsageEvent {
+  currentTokens: number;
+  maxTokens: number;
+  percentage: number;
+}
+
 // ============== 工具调用协议 (MCP 格式) ==============
 
 /**
diff --git a/src/types/chatHistory.ts b/src/types/chatHistory.ts
index ebb33dd..d0c4750 100644
--- a/src/types/chatHistory.ts
+++ b/src/types/chatHistory.ts
@@ -5,7 +5,8 @@ export enum MessageType {
   SYSTEM = "SYSTEM",
   USER = "USER",
   AI = "AI",
-  TOOL_EXECUTION_RESULT = "TOOL_EXECUTION_RESULT"
+  TOOL_EXECUTION_RESULT = "TOOL_EXECUTION_RESULT",
+  COMPACTION_SUMMARY = "COMPACTION_SUMMARY"  // 压缩摘要
 }
 
 /**
@@ -69,10 +70,22 @@ export interface ToolExecutionResultMessage extends BaseMessage {
   text: string; // JSON字符串
 }
 
+/**
+ * 压缩摘要消息
+ */
+export interface CompactionSummaryMessage extends BaseMessage {
+  type: MessageType.COMPACTION_SUMMARY;
+  summary: string;
+  version: number;
+  compactedAt: string;
+  originalMessageCount: number;
+  compactedMessageCount: number;
+}
+
 /**
  * 联合消息类型
  */
-export type ChatMessage = SystemMessage | UserMessage | AiMessage | ToolExecutionResultMessage;
+export type ChatMessage = SystemMessage | UserMessage | AiMessage | ToolExecutionResultMessage | CompactionSummaryMessage;
 
 /**
  * 对话轮次元数据
diff --git a/src/types/memory.ts b/src/types/memory.ts
new file mode 100644
index 0000000..31844ad
--- /dev/null
+++ b/src/types/memory.ts
@@ -0,0 +1,42 @@
+/**
+ * 压缩记忆相关类型定义
+ */
+
+/**
+ * 压缩后的记忆数据
+ */
+export interface CompactedMemory {
+  taskId: string;
+  version: number;
+  compactedAt: string;
+  summary: string;
+  recentMessages: CompactedMessage[];
+  originalMessageCount: number;
+  compactedMessageCount: number;
+}
+
+/**
+ * 压缩消息格式
+ */
+export interface CompactedMessage {
+  type: 'USER' | 'AI' | 'SYSTEM' | 'TOOL_RESULT';
+  content: string;
+  toolCall?: ToolCallInfo;
+}
+
+/**
+ * 工具调用信息
+ */
+export interface ToolCallInfo {
+  toolName: string;
+  toolInput: string;
+  toolOutput?: string;
+}
+
+/**
+ * 记忆压缩 SSE 事件
+ */
+export interface MemoryCompactedEvent {
+  taskId: string;
+  compactedData: CompactedMemory;
+}
diff --git a/src/utils/chatHistoryManager.ts b/src/utils/chatHistoryManager.ts
index 17609e1..9f702d4 100644
--- a/src/utils/chatHistoryManager.ts
+++ b/src/utils/chatHistoryManager.ts
@@ -9,8 +9,10 @@ import {
   UserMessage,
   AiMessage,
   SystemMessage,
-  ToolExecutionResultMessage
+  ToolExecutionResultMessage,
+  CompactionSummaryMessage
 } from '../types/chatHistory';
+import { CompactedMemory, CompactedMessage } from '../types/memory';
 
 /**
  * 会话历史管理器
@@ -23,6 +25,8 @@ export class ChatHistoryManager {
   private currentProjectPath: string | null = null;
   // 存储每个面板的任务信息（taskId 和 projectPath）
   private panelTaskMap: Map<string, { taskId: string; projectPath: string }> = new Map();
+  // 追踪压缩后产生的新消息
+  private newMessagesSinceCompaction: CompactedMessage[] = [];
 
   private constructor() {
     // 设置存储路径: ~/.iccoder
@@ -690,4 +694,203 @@ export class ChatHistoryManager {
       hasMore: end < total
     };
   }
+
+  // ========== 压缩数据相关方法 ==========
+
+  /**
+   * 保存压缩数据（存入 conversation.json 作为压缩摘要消息）
+   */
+  public async saveCompactedData(compacted: CompactedMemory): Promise<void> {
+    // 尝试从多个来源获取 projectPath
+    let projectPath = this.currentProjectPath;
+
+    if (!projectPath) {
+      for (const [, taskInfo] of this.panelTaskMap) {
+        if (taskInfo.taskId === compacted.taskId) {
+          projectPath = taskInfo.projectPath;
+          break;
+        }
+      }
+    }
+
+    if (!projectPath) {
+      console.error('[ChatHistoryManager] 无法保存压缩数据：projectPath 为空');
+      return;
+    }
+
+    // 读取现有对话历史
+    const taskDir = this.getTaskDir(projectPath, compacted.taskId);
+    const conversationPath = path.join(taskDir, 'conversation.json');
+    let messages: ChatMessage[] = [];
+
+    try {
+      const uri = vscode.Uri.file(conversationPath);
+      const content = await vscode.workspace.fs.readFile(uri);
+      messages = JSON.parse(Buffer.from(content).toString('utf-8'));
+    } catch {
+      // 文件不存在，使用空数组
+    }
+
+    // 创建压缩摘要消息
+    const summaryMessage: CompactionSummaryMessage = {
+      type: MessageType.COMPACTION_SUMMARY,
+      summary: compacted.summary,
+      version: compacted.version,
+      compactedAt: compacted.compactedAt,
+      originalMessageCount: compacted.originalMessageCount,
+      compactedMessageCount: compacted.compactedMessageCount
+    };
+
+    // 添加到对话历史
+    messages.push(summaryMessage);
+
+    // 保存
+    const uri = vscode.Uri.file(conversationPath);
+    const content = Buffer.from(JSON.stringify(messages, null, 2), 'utf-8');
+    await vscode.workspace.fs.writeFile(uri, content);
+
+    // 重置新消息追踪
+    this.newMessagesSinceCompaction = [];
+
+    console.log(`[ChatHistoryManager] 压缩摘要已保存到 conversation.json: taskId=${compacted.taskId}`);
+  }
+
+  /**
+   * 加载压缩数据（从 conversation.json 构建）
+   */
+  public async loadCompactedData(taskId: string): Promise<CompactedMemory | null> {
+    // 尝试从多个来源获取 projectPath
+    let projectPath = this.currentProjectPath;
+
+    if (!projectPath) {
+      for (const [, taskInfo] of this.panelTaskMap) {
+        if (taskInfo.taskId === taskId) {
+          projectPath = taskInfo.projectPath;
+          break;
+        }
+      }
+    }
+
+    if (!projectPath) {
+      console.log('[ChatHistoryManager] loadCompactedData: projectPath 为空');
+      return null;
+    }
+
+    // 读取 conversation.json
+    const taskDir = this.getTaskDir(projectPath, taskId);
+    const conversationPath = path.join(taskDir, 'conversation.json');
+
+    try {
+      const uri = vscode.Uri.file(conversationPath);
+      const content = await vscode.workspace.fs.readFile(uri);
+      const messages: ChatMessage[] = JSON.parse(Buffer.from(content).toString('utf-8'));
+
+      if (messages.length === 0) {
+        console.log('[ChatHistoryManager] conversation.json 为空');
+        return null;
+      }
+
+      // 从 conversation.json 构建 CompactedMemory
+      return this.buildCompactedMemoryFromConversation(taskId, messages);
+    } catch {
+      console.log('[ChatHistoryManager] conversation.json 不存在:', conversationPath);
+      return null;
+    }
+  }
+
+  /**
+   * 从 conversation.json 构建 CompactedMemory
+   */
+  private buildCompactedMemoryFromConversation(taskId: string, messages: ChatMessage[]): CompactedMemory {
+    // 查找最后一个压缩摘要消息
+    let lastSummary: CompactionSummaryMessage | null = null;
+    let summaryIndex = -1;
+
+    for (let i = messages.length - 1; i >= 0; i--) {
+      if (messages[i].type === MessageType.COMPACTION_SUMMARY) {
+        lastSummary = messages[i] as CompactionSummaryMessage;
+        summaryIndex = i;
+        break;
+      }
+    }
+
+    // 获取摘要后的消息（或全部消息）
+    const recentMessages = summaryIndex >= 0
+      ? messages.slice(summaryIndex + 1)
+      : messages;
+
+    // 转换为 CompactedMessage 格式
+    const compactedMessages: CompactedMessage[] = recentMessages.map(msg => ({
+      type: this.mapMessageType(msg.type),
+      content: this.extractMessageContent(msg)
+    }));
+
+    return {
+      taskId,
+      version: lastSummary?.version || Date.now(),
+      compactedAt: lastSummary?.compactedAt || new Date().toISOString(),
+      summary: lastSummary?.summary || '',
+      recentMessages: compactedMessages,
+      originalMessageCount: messages.length,
+      compactedMessageCount: compactedMessages.length
+    };
+  }
+
+  /**
+   * 映射消息类型
+   */
+  private mapMessageType(type: MessageType): 'USER' | 'AI' | 'SYSTEM' | 'TOOL_RESULT' {
+    switch (type) {
+      case MessageType.USER: return 'USER';
+      case MessageType.AI: return 'AI';
+      case MessageType.SYSTEM: return 'SYSTEM';
+      case MessageType.TOOL_EXECUTION_RESULT: return 'TOOL_RESULT';
+      default: return 'USER';
+    }
+  }
+
+  /**
+   * 提取消息内容
+   */
+  private extractMessageContent(msg: ChatMessage): string {
+    switch (msg.type) {
+      case MessageType.USER:
+        return (msg as UserMessage).contents?.[0]?.text || '';
+      case MessageType.AI:
+        return (msg as AiMessage).text || '';
+      case MessageType.SYSTEM:
+        return (msg as SystemMessage).text || '';
+      case MessageType.TOOL_EXECUTION_RESULT:
+        return (msg as ToolExecutionResultMessage).text || '';
+      default:
+        return '';
+    }
+  }
+
+  /**
+   * 获取压缩后产生的新消息
+   */
+  public getNewMessagesSinceCompaction(): CompactedMessage[] {
+    return this.newMessagesSinceCompaction;
+  }
+
+  /**
+   * 追踪新消息（用户消息）
+   */
+  public trackUserMessage(text: string): void {
+    this.newMessagesSinceCompaction.push({
+      type: 'USER',
+      content: text
+    });
+  }
+
+  /**
+   * 追踪新消息（AI消息）
+   */
+  public trackAiMessage(text: string): void {
+    this.newMessagesSinceCompaction.push({
+      type: 'AI',
+      content: text
+    });
+  }
 }
diff --git a/src/utils/messageHandler.ts b/src/utils/messageHandler.ts
index ff72b6a..a173fb6 100644
--- a/src/utils/messageHandler.ts
+++ b/src/utils/messageHandler.ts
@@ -27,6 +27,9 @@ let useBackendService = true;
 /** 当前对话会话 */
 let currentSession: DialogSession | null = null;
 
+/** 最后一个活跃的 taskId（用于压缩等操作） */
+let lastTaskId: string | null = null;
+
 /** 待执行的计划（Plan 模式确认后自动执行） */
 let pendingPlanExecution: {
   panel: vscode.WebviewPanel;
@@ -127,6 +130,8 @@ async function handleUserMessageWithBackend(
   // 创建或复用会话
   if (!currentSession || !currentSession.active) {
     currentSession = dialogManager.createSession(extensionPath, reuseTaskId);
+    // 保存 taskId 用于后续操作（如压缩）
+    lastTaskId = currentSession.getTaskId();
     if (reuseTaskId) {
       console.log("[MessageHandler] 复用 taskId 创建会话:", reuseTaskId);
     }
@@ -273,6 +278,16 @@ async function handleUserMessageWithBackend(
         onNotification: (message) => {
           vscode.window.showInformationMessage(message);
         },
+
+        onContextUsage: (data) => {
+          // 发送上下文使用量到 WebView
+          panel.webview.postMessage({
+            command: "contextUsage",
+            currentTokens: data.currentTokens,
+            maxTokens: data.maxTokens,
+            percentage: data.percentage,
+          });
+        },
       },
       mode
     );
@@ -295,7 +310,35 @@ export async function handleUserAnswer(
 /**
  * 中止当前对话
  */
-export function abortCurrentDialog(): void {
+export async function abortCurrentDialog(): Promise<void> {
+  if (currentSession) {
+    // 保存当前已有的对话内容
+    const segments = currentSession.getSegments();
+    if (segments && segments.length > 0) {
+      try {
+        const historyManager = ChatHistoryManager.getInstance();
+        const textContent = segments
+          .filter((s) => s.type === "text" && s.content)
+          .map((s) => s.content)
+          .join("\n");
+
+        // 添加中止标记
+        const abortedContent = textContent + "\n\n[对话已被用户中止]";
+        await historyManager.addAiMessage(abortedContent, undefined, segments);
+        console.log("[MessageHandler] 已保存中止前的对话内容");
+      } catch (error) {
+        console.warn("[MessageHandler] 保存中止对话失败:", error);
+      }
+    }
+  }
+
+  // 通知 WebView 重置分段消息容器
+  const panel = userInteractionManager.getWebviewPanel();
+  if (panel) {
+    panel.webview.postMessage({ command: "resetSegmentedMessage" });
+    console.log("[MessageHandler] 已发送重置分段消息命令");
+  }
+
   dialogManager.abortCurrentSession();
   currentSession = null;
 }
@@ -304,7 +347,15 @@ export function abortCurrentDialog(): void {
  * 获取当前会话的 taskId
  */
 export function getCurrentTaskId(): string | null {
-  return currentSession?.getTaskId() || null;
+  return currentSession?.getTaskId() || lastTaskId;
+}
+
+/**
+ * 设置最后的 taskId（加载历史会话时调用）
+ */
+export function setLastTaskId(taskId: string): void {
+  lastTaskId = taskId;
+  console.log("[MessageHandler] 设置 lastTaskId:", taskId);
 }
 
 /**
diff --git a/src/views/ICViewProvider.ts b/src/views/ICViewProvider.ts
index 286ac2b..74fce75 100644
--- a/src/views/ICViewProvider.ts
+++ b/src/views/ICViewProvider.ts
@@ -90,7 +90,7 @@ export function showICHelperPanel(context: vscode.ExtensionContext) {
           break;
         // 新增：中止对话
         case "abortDialog":
-          abortCurrentDialog();
+          void abortCurrentDialog();
           break;
       }
     },
diff --git a/src/views/webviewContent.ts b/src/views/webviewContent.ts
index 3b63b1a..2eb90e6 100644
--- a/src/views/webviewContent.ts
+++ b/src/views/webviewContent.ts
@@ -562,6 +562,19 @@ export function getWebviewContent(iconUri?: string): string {
           }
           break;
 
+        case 'resetSegmentedMessage':
+          // 重置分段消息容器（停止对话时调用）
+          console.log('[WebView] 重置分段消息容器');
+          currentSegmentedMessage = null;
+          break;
+
+        case 'contextUsage':
+          // 更新上下文使用量显示
+          if (typeof updateContextDisplay === 'function') {
+            updateContextDisplay(message.currentTokens, message.maxTokens);
+          }
+          break;
+
         case 'hideLoading':
           // 隐藏加载指示器
           hideLoadingIndicator();