diff --git a/src/panels/ICHelperPanel.ts b/src/panels/ICHelperPanel.ts
index 7d9c114..daeeaef 100644
--- a/src/panels/ICHelperPanel.ts
+++ b/src/panels/ICHelperPanel.ts
@@ -193,7 +193,7 @@ export async function showICHelperPanel(
           break;
         // 新增：中止对话
         case "abortDialog":
-          abortCurrentDialog();
+          void abortCurrentDialog();
           break;
         // 处理计划操作（只做模式切换，响应已通过 submitAnswer 发送）
         case "planAction":
diff --git a/src/services/apiClient.ts b/src/services/apiClient.ts
index b8ab7b1..9538b1b 100644
--- a/src/services/apiClient.ts
+++ b/src/services/apiClient.ts
@@ -126,6 +126,35 @@ 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 }
+  });
+}
+
 /**
  * 创建成功的工具结果
  */
diff --git a/src/services/dialogService.ts b/src/services/dialogService.ts
index 7478629..69aac6d 100644
--- a/src/services/dialogService.ts
+++ b/src/services/dialogService.ts
@@ -10,7 +10,7 @@ import { executeToolCall, createToolExecutorContext, ToolExecutorContext } from
 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';
 
 /**
@@ -159,30 +159,111 @@ export class DialogSession {
    * 加载知识图谱数据
    * 从 .iccoder/knowledge.json 读取
    */
-  private loadKnowledgeData(): string | null {
+  private async loadKnowledgeData(): Promise<string | null> {
     console.log('[DialogSession] loadKnowledgeData 开始执行');
 
-    const workspaceFolders = vscode.workspace.workspaceFolders;
+    // 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;
     }
 
-    const workspacePath = workspaceFolders[0].uri.fsPath;
-    const knowledgePath = path.join(workspacePath, '.iccoder', 'knowledge.json');
-    console.log('[DialogSession] 知识图谱路径:', knowledgePath);
+    // 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 exists = fs.existsSync(knowledgePath);
-      console.log('[DialogSession] 文件存在:', exists);
+      try {
+        const content = await this.readTextFileWithRetry(knowledgeUri, 5);
+        if (!content) {
+          continue;
+        }
 
-      if (exists) {
-        const content = fs.readFileSync(knowledgePath, 'utf-8');
-        console.log('[DialogSession] 加载知识图谱成功, 长度:', content.length);
-        return content;
+        // 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));
       }
-    } catch (error) {
-      console.warn('[DialogSession] 加载知识图谱失败:', error);
     }
 
     return null;
@@ -253,7 +334,7 @@ export class DialogSession {
     const newMessages = historyManager.getNewMessagesSinceCompaction();
 
     // 加载知识图谱数据
-    const knowledgeData = this.loadKnowledgeData();
+    const knowledgeData = await this.loadKnowledgeData();
     console.log('[DialogSession] knowledgeData 加载结果:', knowledgeData ? `${knowledgeData.length} 字符` : 'null');
 
     const request: DialogRequest = {
@@ -554,6 +635,25 @@ 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/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 f5e9a21..ff1dcfb 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
diff --git a/src/utils/messageHandler.ts b/src/utils/messageHandler.ts
index 368abcf..ead218a 100644
--- a/src/utils/messageHandler.ts
+++ b/src/utils/messageHandler.ts
@@ -273,7 +273,35 @@ 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;
 }
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 691492a..25bc90f 100644
--- a/src/views/webviewContent.ts
+++ b/src/views/webviewContent.ts
@@ -565,6 +565,12 @@ 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 'hideLoading':
           // 隐藏加载指示器
           hideLoadingIndicator();