diff --git a/API-V2.md b/API-V2.md
new file mode 100644
index 0000000..a5c3648
--- /dev/null
+++ b/API-V2.md
@@ -0,0 +1,394 @@
+# API v2 升级说明
+
+## 🎉 新功能概览
+
+### 1. 项目管理
+- 所有任务必须隶属于项目
+- 项目由人类创建和管理
+
+### 2. 协作规约
+- 每个项目可设置协作规约
+- 智能体领取任务时会收到规约提醒
+- 智能体必须严格遵守规约内容
+
+### 3. 信息共享清单
+- 每个项目维护共享笔记列表
+- 人类和智能体都可以添加/编辑
+- 支持 CRUD 操作
+
+### 4. 任务增强
+- **Markdown 支持**: 任务描述使用 Markdown 格式
+- **附件管理**: 支持文件上传（最大 10MB）
+- **子任务**: 支持父子任务关系
+- **任务类型**: requirement（需求）| design（设计）| development（开发）| testing（测试）| deployment（部署）
+- **新状态流**: initial（初始）→ in_progress（进行中）→ testing_pending（待测试）→ testing（测试中）→ completed（完成）
+
+## 📡 API 端点
+
+### 项目管理
+
+#### 创建项目
+```http
+POST /api/projects
+Content-Type: application/json
+
+{
+  "name": "项目名称",
+  "description": "项目描述",
+  "created_by": "human"
+}
+```
+
+#### 获取所有项目
+```http
+GET /api/projects
+```
+
+#### 获取项目详情
+```http
+GET /api/projects/:id
+```
+
+#### 更新项目
+```http
+PUT /api/projects/:id
+Content-Type: application/json
+
+{
+  "name": "新名称",
+  "description": "新描述",
+  "status": "active" | "archived"
+}
+```
+
+### 协作规约
+
+#### 设置项目协作规约
+```http
+POST /api/projects/:projectId/rules
+Content-Type: application/json
+
+{
+  "content": "协作规约内容（Markdown）",
+  "created_by": "human"
+}
+```
+
+#### 获取协作规约
+```http
+GET /api/projects/:projectId/rules
+```
+
+### 信息共享清单
+
+#### 添加共享笔记
+```http
+POST /api/projects/:projectId/notes
+Content-Type: application/json
+
+{
+  "content": "笔记内容（Markdown）",
+  "created_by": "human" | "agent_id"
+}
+```
+
+#### 获取共享笔记列表
+```http
+GET /api/projects/:projectId/notes
+```
+
+#### 更新共享笔记
+```http
+PUT /api/projects/:projectId/notes/:noteId
+Content-Type: application/json
+
+{
+  "content": "更新后的内容"
+}
+```
+
+#### 删除共享笔记
+```http
+DELETE /api/projects/:projectId/notes/:noteId
+```
+
+### 任务管理（增强）
+
+#### 创建任务
+```http
+POST /api/tasks
+Content-Type: application/json
+
+{
+  "project_id": "项目ID",  // 必填
+  "parent_task_id": "父任务ID",  // 可选，创建子任务时使用
+  "title": "任务标题",
+  "description": "# 任务描述\n\n使用 **Markdown** 格式",
+  "task_type": "development",  // requirement | design | development | testing | deployment
+  "priority": "normal",  // low | normal | high
+  "created_by": "human"
+}
+```
+
+#### 获取任务列表
+```http
+GET /api/tasks?project_id=xxx&status=initial&root=true
+
+参数：
+- project_id: 按项目过滤
+- status: initial | in_progress | testing_pending | testing | completed
+- parent_task_id: 获取某任务的子任务
+- root=true: 只获取根任务（无父任务）
+```
+
+#### 获取任务详情（含子任务和附件）
+```http
+GET /api/tasks/:id
+
+响应:
+{
+  "id": "xxx",
+  "title": "...",
+  ...
+  "subtasks": [ ... ],  // 子任务列表
+  "attachments": [ ... ]  // 附件列表
+}
+```
+
+#### 领取任务（智能体会收到协作规约）
+```http
+POST /api/tasks/:id/claim
+Content-Type: application/json
+
+{
+  "agent_id": "智能体ID"
+}
+
+响应（如果项目有协作规约）:
+{
+  "message": "任务领取成功",
+  "collaboration_rules": "项目协作规约内容",
+  "notice": "⚠️ 请严格遵守项目协作规约"
+}
+```
+
+#### 更新任务
+```http
+PUT /api/tasks/:id
+Content-Type: application/json
+
+{
+  "status": "in_progress",
+  "description": "更新描述",
+  "task_type": "testing",
+  "priority": "high",
+  "result": "任务结果"
+}
+```
+
+### 附件管理
+
+#### 上传附件
+```http
+POST /api/tasks/:taskId/attachments
+Content-Type: multipart/form-data
+
+file: [文件]
+uploaded_by: "human" | "agent_id"
+
+限制：单文件最大 10MB
+```
+
+#### 获取任务附件列表
+```http
+GET /api/tasks/:taskId/attachments
+
+响应:
+[
+  {
+    "id": "xxx",
+    "filename": "...",
+    "original_name": "原始文件名",
+    "file_size": 12345,
+    "mime_type": "image/png",
+    "url": "/uploads/xxx",
+    ...
+  }
+]
+```
+
+#### 删除附件
+```http
+DELETE /api/tasks/:taskId/attachments/:attachmentId
+```
+
+### 统计信息（增强）
+
+```http
+GET /api/stats
+
+响应:
+{
+  "total_agents": 5,
+  "active_agents": 2,
+  "total_projects": 3,
+  "total_tasks": 20,
+  "tasks_by_status": {
+    "initial": 5,
+    "in_progress": 3,
+    "testing_pending": 2,
+    "testing": 1,
+    "completed": 9
+  },
+  "tasks_by_type": {
+    "requirement": 4,
+    "design": 3,
+    "development": 8,
+    "testing": 3,
+    "deployment": 2
+  }
+}
+```
+
+## 🗄️ 数据库变更
+
+### 新增表
+
+1. **projects** - 项目表
+   - id, name, description, created_by, created_at, updated_at, status
+
+2. **collaboration_rules** - 协作规约表
+   - id, project_id, content, created_by, created_at, updated_at
+
+3. **project_notes** - 项目共享笔记表
+   - id, project_id, content, created_by, created_at, updated_at
+
+4. **attachments** - 附件表
+   - id, task_id, filename, original_name, file_path, file_size, mime_type, uploaded_by, uploaded_at
+
+### 修改表
+
+**tasks** 表新增字段：
+- `project_id` - 所属项目（外键，必填）
+- `parent_task_id` - 父任务ID（外键，可选）
+- `task_type` - 任务类型（requirement/design/development/testing/deployment）
+- 状态值更新为：initial | in_progress | testing_pending | testing | completed
+
+## 🔧 使用示例
+
+### Python 客户端示例
+
+```python
+import requests
+
+API_BASE = "http://localhost:3000/api"
+
+# 1. 创建项目
+project = requests.post(f"{API_BASE}/projects", json={
+    "name": "智能客服系统",
+    "description": "基于 AI 的客服系统开发项目"
+}).json()
+
+project_id = project['id']
+
+# 2. 设置协作规约
+requests.post(f"{API_BASE}/projects/{project_id}/rules", json={
+    "content": """
+# 协作规约
+
+1. **代码规范**: 严格遵循 PEP 8
+2. **提交规范**: 每次提交必须包含测试
+3. **沟通规范**: 遇到问题及时在共享清单记录
+4. **测试要求**: 覆盖率不低于 80%
+    """
+})
+
+# 3. 创建任务
+task = requests.post(f"{API_BASE}/tasks", json={
+    "project_id": project_id,
+    "title": "设计数据库架构",
+    "description": "## 需求\n\n设计用户、会话、消息三张表",
+    "task_type": "design",
+    "priority": "high"
+}).json()
+
+task_id = task['id']
+
+# 4. 智能体注册并领取任务
+agent = requests.post(f"{API_BASE}/agents/register", json={
+    "name": "数据库设计专家",
+    "type": "design",
+    "capabilities": ["database_design", "sql"]
+}).json()
+
+response = requests.post(f"{API_BASE}/tasks/{task_id}/claim", json={
+    "agent_id": agent['id']
+}).json()
+
+# 智能体会收到协作规约
+if 'collaboration_rules' in response:
+    print("收到协作规约:")
+    print(response['collaboration_rules'])
+
+# 5. 添加共享笔记
+requests.post(f"{API_BASE}/projects/{project_id}/notes", json={
+    "content": "数据库已选择 PostgreSQL 15",
+    "created_by": agent['id']
+})
+
+# 6. 上传附件（设计图）
+with open('database_schema.png', 'rb') as f:
+    requests.post(
+        f"{API_BASE}/tasks/{task_id}/attachments",
+        files={'file': f},
+        data={'uploaded_by': agent['id']}
+    )
+
+# 7. 完成任务
+requests.put(f"{API_BASE}/tasks/{task_id}", json={
+    "status": "completed",
+    "result": "数据库架构设计完成，详见附件"
+})
+```
+
+## 📝 迁移指南
+
+如果你有使用 v1 版本的数据，需要：
+
+1. **备份数据库**
+```bash
+pg_dump agent_tasks > backup.sql
+```
+
+2. **运行 v2 服务**（会自动创建新表）
+```bash
+node server-v2.js
+```
+
+3. **手动迁移任务**
+   - 创建一个默认项目
+   - 将所有 v1 任务关联到该项目
+
+## 🚀 部署
+
+使用 `server-v2.js` 替代 `server-postgres.js`:
+
+```bash
+DB_HOST=localhost DB_PORT=5433 DB_PASSWORD=postgres node server-v2.js
+```
+
+或更新 `package.json`:
+```json
+{
+  "scripts": {
+    "start": "node server-v2.js"
+  }
+}
+```
+
+## ⚠️ 重要变更
+
+1. **所有任务必须属于项目** - 创建任务时 `project_id` 为必填
+2. **任务状态变更** - 从 3 个状态扩展到 5 个状态
+3. **新增任务类型** - 必须指定任务类型
+4. **协作规约强制推送** - 智能体领取任务时自动获取规约
diff --git a/package-lock.json b/package-lock.json
index f3b6b2a..9b48d52 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "body-parser": "^2.2.2",
         "cors": "^2.8.6",
         "express": "^5.2.1",
+        "multer": "^2.0.2",
         "pg": "^8.18.0",
         "sqlite3": "^5.1.7",
         "uuid": "^9.0.1"
@@ -130,6 +131,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/append-field": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
+      "integrity": "sha512-klpgFSWLW1ZEs8svjfb7g4qWY0YS5imI82dTg+QahUvJ8YqAY0P10Uk8tTyh9ZGuYEZEMaeJYCF5BFuX552hsw==",
+      "license": "MIT"
+    },
     "node_modules/aproba": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/aproba/-/aproba-2.1.0.tgz",
@@ -258,6 +265,23 @@
         "ieee754": "^1.1.13"
       }
     },
+    "node_modules/buffer-from": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
+      "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==",
+      "license": "MIT"
+    },
+    "node_modules/busboy": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-1.6.0.tgz",
+      "integrity": "sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==",
+      "dependencies": {
+        "streamsearch": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=10.16.0"
+      }
+    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -362,6 +386,21 @@
       "license": "MIT",
       "optional": true
     },
+    "node_modules/concat-stream": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-2.0.0.tgz",
+      "integrity": "sha512-MWufYdFw53ccGjCA+Ol7XJYpAlW6/prSMzuPOTRnJGcGzuhLn4Scrz7qf6o8bROZ514ltazcIFJZevcfbo0x7A==",
+      "engines": [
+        "node >= 6.0"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.0.2",
+        "typedarray": "^0.0.6"
+      }
+    },
     "node_modules/console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
@@ -1350,6 +1389,79 @@
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
       "license": "MIT"
     },
+    "node_modules/multer": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/multer/-/multer-2.0.2.tgz",
+      "integrity": "sha512-u7f2xaZ/UG8oLXHvtF/oWTRvT44p9ecwBBqTwgJVq0+4BW1g8OW01TyMEGWBHbyMOYVHXslaut7qEQ1meATXgw==",
+      "license": "MIT",
+      "dependencies": {
+        "append-field": "^1.0.0",
+        "busboy": "^1.6.0",
+        "concat-stream": "^2.0.0",
+        "mkdirp": "^0.5.6",
+        "object-assign": "^4.1.1",
+        "type-is": "^1.6.18",
+        "xtend": "^4.0.2"
+      },
+      "engines": {
+        "node": ">= 10.16.0"
+      }
+    },
+    "node_modules/multer/node_modules/media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha512-dq+qelQ9akHpcOl/gUVRTxVIOkAJ1wR3QAvb4RsVjS8oVoFjDGTc679wJYmUmknUF5HwMLOgb5O+a3KxfWapPQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/mime-db": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "license": "MIT",
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/mkdirp": {
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
+      "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
+      "license": "MIT",
+      "dependencies": {
+        "minimist": "^1.2.6"
+      },
+      "bin": {
+        "mkdirp": "bin/cmd.js"
+      }
+    },
+    "node_modules/multer/node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "license": "MIT",
+      "dependencies": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/napi-build-utils": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/napi-build-utils/-/napi-build-utils-2.0.0.tgz",
@@ -2153,6 +2265,14 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/streamsearch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz",
+      "integrity": "sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/string_decoder": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
@@ -2295,6 +2415,12 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/typedarray": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==",
+      "license": "MIT"
+    },
     "node_modules/unique-filename": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
diff --git a/package.json b/package.json
index d7deb4a..5953c63 100644
--- a/package.json
+++ b/package.json
@@ -8,13 +8,18 @@
     "dev": "node server-postgres.js",
     "sqlite": "node server.js"
   },
-  "keywords": ["multi-agent", "task-management", "ai"],
+  "keywords": [
+    "multi-agent",
+    "task-management",
+    "ai"
+  ],
   "author": "work-1",
   "license": "MIT",
   "dependencies": {
     "body-parser": "^2.2.2",
     "cors": "^2.8.6",
     "express": "^5.2.1",
+    "multer": "^2.0.2",
     "pg": "^8.18.0",
     "sqlite3": "^5.1.7",
     "uuid": "^9.0.1"
diff --git a/server-v2.js b/server-v2.js
new file mode 100644
index 0000000..755d1a9
--- /dev/null
+++ b/server-v2.js
@@ -0,0 +1,861 @@
+const express = require('express');
+const { Pool } = require('pg');
+const cors = require('cors');
+const bodyParser = require('body-parser');
+const { v4: uuidv4 } = require('uuid');
+const os = require('os');
+const multer = require('multer');
+const path = require('path');
+const fs = require('fs');
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+// 中间件
+app.use(cors());
+app.use(bodyParser.json({ limit: '50mb' }));
+app.use(express.static('public'));
+app.use('/uploads', express.static('uploads'));
+
+// 配置文件上传
+const storage = multer.diskStorage({
+  destination: (req, file, cb) => {
+    const dir = 'uploads/';
+    if (!fs.existsSync(dir)) {
+      fs.mkdirSync(dir, { recursive: true });
+    }
+    cb(null, dir);
+  },
+  filename: (req, file, cb) => {
+    const uniqueName = `${Date.now()}-${Math.round(Math.random() * 1E9)}${path.extname(file.originalname)}`;
+    cb(null, uniqueName);
+  }
+});
+
+const upload = multer({ 
+  storage,
+  limits: { fileSize: 10 * 1024 * 1024 } // 10MB
+});
+
+// PostgreSQL 连接池
+const pool = new Pool({
+  host: process.env.DB_HOST || 'postgres',
+  port: process.env.DB_PORT || 5432,
+  database: process.env.DB_NAME || 'agent_tasks',
+  user: process.env.DB_USER || 'postgres',
+  password: process.env.DB_PASSWORD || 'postgres',
+  max: 20,
+  idleTimeoutMillis: 30000,
+  connectionTimeoutMillis: 2000,
+});
+
+// 测试数据库连接
+pool.connect((err, client, release) => {
+  if (err) {
+    console.error('❌ 数据库连接失败:', err.message);
+    process.exit(1);
+  } else {
+    console.log('✅ 已连接到 PostgreSQL 数据库');
+    release();
+    initDatabase();
+  }
+});
+
+// 创建表结构
+async function initDatabase() {
+  const client = await pool.connect();
+  try {
+    await client.query('BEGIN');
+    
+    // 智能体表
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS agents (
+        id VARCHAR(255) PRIMARY KEY,
+        name VARCHAR(255) NOT NULL,
+        type VARCHAR(100),
+        capabilities JSONB,
+        status VARCHAR(50) DEFAULT 'idle',
+        registered_at BIGINT,
+        last_heartbeat BIGINT
+      )
+    `);
+
+    // 项目表
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS projects (
+        id VARCHAR(255) PRIMARY KEY,
+        name VARCHAR(500) NOT NULL,
+        description TEXT,
+        created_by VARCHAR(255),
+        created_at BIGINT,
+        updated_at BIGINT,
+        status VARCHAR(50) DEFAULT 'active'
+      )
+    `);
+
+    // 协作规约表
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS collaboration_rules (
+        id VARCHAR(255) PRIMARY KEY,
+        project_id VARCHAR(255) REFERENCES projects(id) ON DELETE CASCADE,
+        content TEXT NOT NULL,
+        created_by VARCHAR(255),
+        created_at BIGINT,
+        updated_at BIGINT
+      )
+    `);
+
+    // 项目信息共享清单表
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS project_notes (
+        id VARCHAR(255) PRIMARY KEY,
+        project_id VARCHAR(255) REFERENCES projects(id) ON DELETE CASCADE,
+        content TEXT NOT NULL,
+        created_by VARCHAR(255),
+        created_at BIGINT,
+        updated_at BIGINT
+      )
+    `);
+
+    // 任务表（扩展）
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS tasks (
+        id VARCHAR(255) PRIMARY KEY,
+        project_id VARCHAR(255) REFERENCES projects(id) ON DELETE CASCADE,
+        parent_task_id VARCHAR(255) REFERENCES tasks(id) ON DELETE SET NULL,
+        title VARCHAR(500) NOT NULL,
+        description TEXT,
+        task_type VARCHAR(50) DEFAULT 'development',
+        priority VARCHAR(50) DEFAULT 'normal',
+        status VARCHAR(50) DEFAULT 'initial',
+        created_by VARCHAR(255),
+        assigned_to VARCHAR(255),
+        created_at BIGINT,
+        updated_at BIGINT,
+        completed_at BIGINT,
+        result TEXT
+      )
+    `);
+
+    // 附件表
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS attachments (
+        id VARCHAR(255) PRIMARY KEY,
+        task_id VARCHAR(255) REFERENCES tasks(id) ON DELETE CASCADE,
+        filename VARCHAR(500) NOT NULL,
+        original_name VARCHAR(500) NOT NULL,
+        file_path VARCHAR(1000) NOT NULL,
+        file_size BIGINT,
+        mime_type VARCHAR(100),
+        uploaded_by VARCHAR(255),
+        uploaded_at BIGINT
+      )
+    `);
+
+    // 创建索引
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_agents_status ON agents(status)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_tasks_status ON tasks(status)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_tasks_project ON tasks(project_id)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_tasks_parent ON tasks(parent_task_id)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_tasks_assigned ON tasks(assigned_to)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_attachments_task ON attachments(task_id)`);
+    await client.query(`CREATE INDEX IF NOT EXISTS idx_project_notes_project ON project_notes(project_id)`);
+
+    await client.query('COMMIT');
+    console.log('✅ 数据库表已初始化');
+  } catch (err) {
+    await client.query('ROLLBACK');
+    console.error('❌ 数据库初始化失败:', err);
+  } finally {
+    client.release();
+  }
+}
+
+// ==================== 项目管理 API ====================
+
+// 创建项目
+app.post('/api/projects', async (req, res) => {
+  const { name, description, created_by } = req.body;
+  
+  if (!name) {
+    return res.status(400).json({ error: '项目名称不能为空' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    await pool.query(
+      `INSERT INTO projects (id, name, description, created_by, created_at, updated_at, status) 
+       VALUES ($1, $2, $3, $4, $5, $6, 'active')`,
+      [id, name, description || '', created_by || 'human', now, now]
+    );
+    
+    res.json({ 
+      id, 
+      name,
+      status: 'active',
+      message: '项目创建成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取所有项目
+app.get('/api/projects', async (req, res) => {
+  try {
+    const result = await pool.query('SELECT * FROM projects ORDER BY created_at DESC');
+    res.json(result.rows);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取单个项目详情
+app.get('/api/projects/:id', async (req, res) => {
+  try {
+    const result = await pool.query('SELECT * FROM projects WHERE id = $1', [req.params.id]);
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: '项目不存在' });
+    }
+    res.json(result.rows[0]);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 更新项目
+app.put('/api/projects/:id', async (req, res) => {
+  const { id } = req.params;
+  const { name, description, status } = req.body;
+  
+  const updates = [];
+  const params = [];
+  let paramIndex = 1;
+  
+  if (name) {
+    updates.push(`name = $${paramIndex++}`);
+    params.push(name);
+  }
+  if (description !== undefined) {
+    updates.push(`description = $${paramIndex++}`);
+    params.push(description);
+  }
+  if (status) {
+    updates.push(`status = $${paramIndex++}`);
+    params.push(status);
+  }
+  
+  updates.push(`updated_at = $${paramIndex++}`);
+  params.push(Date.now());
+  params.push(id);
+  
+  try {
+    const result = await pool.query(
+      `UPDATE projects SET ${updates.join(', ')} WHERE id = $${paramIndex}`,
+      params
+    );
+    
+    if (result.rowCount === 0) {
+      return res.status(404).json({ error: '项目不存在' });
+    }
+    
+    res.json({ message: '项目更新成功' });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// ==================== 协作规约 API ====================
+
+// 设置协作规约
+app.post('/api/projects/:projectId/rules', async (req, res) => {
+  const { projectId } = req.params;
+  const { content, created_by } = req.body;
+  
+  if (!content) {
+    return res.status(400).json({ error: '规约内容不能为空' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    // 检查项目是否存在
+    const projectCheck = await pool.query('SELECT id FROM projects WHERE id = $1', [projectId]);
+    if (projectCheck.rows.length === 0) {
+      return res.status(404).json({ error: '项目不存在' });
+    }
+
+    // 删除旧规约（每个项目只保留一个）
+    await pool.query('DELETE FROM collaboration_rules WHERE project_id = $1', [projectId]);
+    
+    // 创建新规约
+    await pool.query(
+      `INSERT INTO collaboration_rules (id, project_id, content, created_by, created_at, updated_at) 
+       VALUES ($1, $2, $3, $4, $5, $6)`,
+      [id, projectId, content, created_by || 'human', now, now]
+    );
+    
+    res.json({ 
+      id,
+      message: '协作规约设置成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取协作规约
+app.get('/api/projects/:projectId/rules', async (req, res) => {
+  try {
+    const result = await pool.query(
+      'SELECT * FROM collaboration_rules WHERE project_id = $1',
+      [req.params.projectId]
+    );
+    res.json(result.rows[0] || null);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// ==================== 信息共享清单 API ====================
+
+// 添加共享笔记
+app.post('/api/projects/:projectId/notes', async (req, res) => {
+  const { projectId } = req.params;
+  const { content, created_by } = req.body;
+  
+  if (!content) {
+    return res.status(400).json({ error: '笔记内容不能为空' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    await pool.query(
+      `INSERT INTO project_notes (id, project_id, content, created_by, created_at, updated_at) 
+       VALUES ($1, $2, $3, $4, $5, $6)`,
+      [id, projectId, content, created_by || 'human', now, now]
+    );
+    
+    res.json({ 
+      id,
+      message: '笔记添加成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取共享笔记列表
+app.get('/api/projects/:projectId/notes', async (req, res) => {
+  try {
+    const result = await pool.query(
+      'SELECT * FROM project_notes WHERE project_id = $1 ORDER BY created_at DESC',
+      [req.params.projectId]
+    );
+    res.json(result.rows);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 更新共享笔记
+app.put('/api/projects/:projectId/notes/:noteId', async (req, res) => {
+  const { noteId } = req.params;
+  const { content } = req.body;
+  
+  try {
+    const result = await pool.query(
+      'UPDATE project_notes SET content = $1, updated_at = $2 WHERE id = $3',
+      [content, Date.now(), noteId]
+    );
+    
+    if (result.rowCount === 0) {
+      return res.status(404).json({ error: '笔记不存在' });
+    }
+    
+    res.json({ message: '笔记更新成功' });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 删除共享笔记
+app.delete('/api/projects/:projectId/notes/:noteId', async (req, res) => {
+  try {
+    const result = await pool.query(
+      'DELETE FROM project_notes WHERE id = $1',
+      [req.params.noteId]
+    );
+    
+    if (result.rowCount === 0) {
+      return res.status(404).json({ error: '笔记不存在' });
+    }
+    
+    res.json({ message: '笔记删除成功' });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// ==================== 智能体 API ====================
+
+// 注册智能体
+app.post('/api/agents/register', async (req, res) => {
+  const { name, type, capabilities } = req.body;
+  
+  if (!name) {
+    return res.status(400).json({ error: '智能体名称不能为空' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    await pool.query(
+      `INSERT INTO agents (id, name, type, capabilities, status, registered_at, last_heartbeat) 
+       VALUES ($1, $2, $3, $4, 'idle', $5, $6)`,
+      [id, name, type || 'general', JSON.stringify(capabilities || []), now, now]
+    );
+    
+    res.json({ 
+      id, 
+      name, 
+      type: type || 'general',
+      status: 'idle',
+      message: '智能体注册成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取所有智能体
+app.get('/api/agents', async (req, res) => {
+  try {
+    const result = await pool.query('SELECT * FROM agents ORDER BY registered_at DESC');
+    res.json(result.rows.map(row => ({
+      ...row,
+      capabilities: row.capabilities || []
+    })));
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 更新智能体状态（心跳）
+app.post('/api/agents/:id/heartbeat', async (req, res) => {
+  const { id } = req.params;
+  const { status } = req.body;
+  
+  try {
+    const result = await pool.query(
+      'UPDATE agents SET status = $1, last_heartbeat = $2 WHERE id = $3',
+      [status || 'idle', Date.now(), id]
+    );
+    
+    if (result.rowCount === 0) {
+      return res.status(404).json({ error: '智能体不存在' });
+    }
+    
+    res.json({ message: '心跳更新成功' });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// ==================== 任务管理 API ====================
+
+// 创建任务（支持子任务）
+app.post('/api/tasks', async (req, res) => {
+  const { project_id, parent_task_id, title, description, task_type, priority, created_by } = req.body;
+  
+  if (!title) {
+    return res.status(400).json({ error: '任务标题不能为空' });
+  }
+  
+  if (!project_id) {
+    return res.status(400).json({ error: '必须指定项目ID' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    await pool.query(
+      `INSERT INTO tasks (id, project_id, parent_task_id, title, description, task_type, priority, status, created_by, created_at, updated_at) 
+       VALUES ($1, $2, $3, $4, $5, $6, $7, 'initial', $8, $9, $10)`,
+      [id, project_id, parent_task_id || null, title, description || '', 
+       task_type || 'development', priority || 'normal', created_by || 'human', now, now]
+    );
+    
+    res.json({ 
+      id, 
+      title,
+      status: 'initial',
+      message: '任务创建成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取任务列表（支持按项目、状态、父任务过滤）
+app.get('/api/tasks', async (req, res) => {
+  const { project_id, status, parent_task_id } = req.query;
+  
+  try {
+    let query = 'SELECT * FROM tasks WHERE 1=1';
+    const params = [];
+    let paramIndex = 1;
+    
+    if (project_id) {
+      query += ` AND project_id = $${paramIndex++}`;
+      params.push(project_id);
+    }
+    
+    if (status) {
+      query += ` AND status = $${paramIndex++}`;
+      params.push(status);
+    }
+    
+    if (parent_task_id) {
+      query += ` AND parent_task_id = $${paramIndex++}`;
+      params.push(parent_task_id);
+    } else if (req.query.root === 'true') {
+      query += ' AND parent_task_id IS NULL';
+    }
+    
+    query += ' ORDER BY created_at DESC';
+    
+    const result = await pool.query(query, params);
+    res.json(result.rows);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取任务详情（包含子任务和附件）
+app.get('/api/tasks/:id', async (req, res) => {
+  try {
+    const taskResult = await pool.query('SELECT * FROM tasks WHERE id = $1', [req.params.id]);
+    if (taskResult.rows.length === 0) {
+      return res.status(404).json({ error: '任务不存在' });
+    }
+    
+    const task = taskResult.rows[0];
+    
+    // 获取子任务
+    const subtasksResult = await pool.query(
+      'SELECT * FROM tasks WHERE parent_task_id = $1 ORDER BY created_at',
+      [req.params.id]
+    );
+    
+    // 获取附件
+    const attachmentsResult = await pool.query(
+      'SELECT * FROM attachments WHERE task_id = $1 ORDER BY uploaded_at',
+      [req.params.id]
+    );
+    
+    res.json({
+      ...task,
+      subtasks: subtasksResult.rows,
+      attachments: attachmentsResult.rows
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 领取任务
+app.post('/api/tasks/:id/claim', async (req, res) => {
+  const { id } = req.params;
+  const { agent_id } = req.body;
+  
+  if (!agent_id) {
+    return res.status(400).json({ error: '需要提供智能体ID' });
+  }
+
+  const client = await pool.connect();
+  try {
+    await client.query('BEGIN');
+    
+    const taskResult = await client.query('SELECT status, project_id FROM tasks WHERE id = $1', [id]);
+    
+    if (taskResult.rows.length === 0) {
+      await client.query('ROLLBACK');
+      return res.status(404).json({ error: '任务不存在' });
+    }
+    
+    const task = taskResult.rows[0];
+    
+    if (task.status !== 'initial' && task.status !== 'in_progress') {
+      await client.query('ROLLBACK');
+      return res.status(400).json({ error: '任务状态不允许领取' });
+    }
+    
+    // 获取项目的协作规约
+    const rulesResult = await client.query(
+      'SELECT content FROM collaboration_rules WHERE project_id = $1',
+      [task.project_id]
+    );
+
+    await client.query(
+      'UPDATE tasks SET status = $1, assigned_to = $2, updated_at = $3 WHERE id = $4',
+      ['in_progress', agent_id, Date.now(), id]
+    );
+    
+    await client.query('UPDATE agents SET status = $1 WHERE id = $2', ['busy', agent_id]);
+    
+    await client.query('COMMIT');
+    
+    const response = { 
+      message: '任务领取成功'
+    };
+    
+    // 如果有协作规约，返回给智能体
+    if (rulesResult.rows.length > 0) {
+      response.collaboration_rules = rulesResult.rows[0].content;
+      response.notice = '⚠️ 请严格遵守项目协作规约';
+    }
+    
+    res.json(response);
+  } catch (err) {
+    await client.query('ROLLBACK');
+    res.status(500).json({ error: err.message });
+  } finally {
+    client.release();
+  }
+});
+
+// 更新任务状态
+app.put('/api/tasks/:id', async (req, res) => {
+  const { id } = req.params;
+  const { status, result, description, task_type, priority } = req.body;
+  
+  const client = await pool.connect();
+  try {
+    await client.query('BEGIN');
+    
+    const now = Date.now();
+    const updates = [];
+    const params = [];
+    let paramIndex = 1;
+    
+    if (status) {
+      updates.push(`status = $${paramIndex++}`);
+      params.push(status);
+    }
+    if (result !== undefined) {
+      updates.push(`result = $${paramIndex++}`);
+      params.push(result);
+    }
+    if (description !== undefined) {
+      updates.push(`description = $${paramIndex++}`);
+      params.push(description);
+    }
+    if (task_type) {
+      updates.push(`task_type = $${paramIndex++}`);
+      params.push(task_type);
+    }
+    if (priority) {
+      updates.push(`priority = $${paramIndex++}`);
+      params.push(priority);
+    }
+    if (status === 'completed') {
+      updates.push(`completed_at = $${paramIndex++}`);
+      params.push(now);
+    }
+    
+    updates.push(`updated_at = $${paramIndex++}`);
+    params.push(now);
+    params.push(id);
+    
+    const updateResult = await client.query(
+      `UPDATE tasks SET ${updates.join(', ')} WHERE id = $${paramIndex}`,
+      params
+    );
+    
+    if (updateResult.rowCount === 0) {
+      await client.query('ROLLBACK');
+      return res.status(404).json({ error: '任务不存在' });
+    }
+    
+    // 如果任务完成，将智能体状态改为 idle
+    if (status === 'completed') {
+      const taskResult = await client.query('SELECT assigned_to FROM tasks WHERE id = $1', [id]);
+      if (taskResult.rows.length > 0 && taskResult.rows[0].assigned_to) {
+        await client.query('UPDATE agents SET status = $1 WHERE id = $2', ['idle', taskResult.rows[0].assigned_to]);
+      }
+    }
+    
+    await client.query('COMMIT');
+    res.json({ message: '任务状态更新成功' });
+  } catch (err) {
+    await client.query('ROLLBACK');
+    res.status(500).json({ error: err.message });
+  } finally {
+    client.release();
+  }
+});
+
+// ==================== 附件管理 API ====================
+
+// 上传附件
+app.post('/api/tasks/:taskId/attachments', upload.single('file'), async (req, res) => {
+  const { taskId } = req.params;
+  const { uploaded_by } = req.body;
+  
+  if (!req.file) {
+    return res.status(400).json({ error: '没有上传文件' });
+  }
+
+  const id = uuidv4();
+  const now = Date.now();
+
+  try {
+    await pool.query(
+      `INSERT INTO attachments (id, task_id, filename, original_name, file_path, file_size, mime_type, uploaded_by, uploaded_at) 
+       VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)`,
+      [id, taskId, req.file.filename, req.file.originalname, req.file.path, 
+       req.file.size, req.file.mimetype, uploaded_by || 'human', now]
+    );
+    
+    res.json({ 
+      id,
+      filename: req.file.filename,
+      original_name: req.file.originalname,
+      url: `/uploads/${req.file.filename}`,
+      message: '附件上传成功' 
+    });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 获取任务附件列表
+app.get('/api/tasks/:taskId/attachments', async (req, res) => {
+  try {
+    const result = await pool.query(
+      'SELECT * FROM attachments WHERE task_id = $1 ORDER BY uploaded_at DESC',
+      [req.params.taskId]
+    );
+    res.json(result.rows.map(row => ({
+      ...row,
+      url: `/uploads/${row.filename}`
+    })));
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 删除附件
+app.delete('/api/tasks/:taskId/attachments/:attachmentId', async (req, res) => {
+  try {
+    const result = await pool.query(
+      'SELECT file_path FROM attachments WHERE id = $1',
+      [req.params.attachmentId]
+    );
+    
+    if (result.rows.length === 0) {
+      return res.status(404).json({ error: '附件不存在' });
+    }
+    
+    // 删除文件
+    const filePath = result.rows[0].file_path;
+    if (fs.existsSync(filePath)) {
+      fs.unlinkSync(filePath);
+    }
+    
+    // 删除数据库记录
+    await pool.query('DELETE FROM attachments WHERE id = $1', [req.params.attachmentId]);
+    
+    res.json({ message: '附件删除成功' });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// ==================== 统计信息 API ====================
+
+app.get('/api/stats', async (req, res) => {
+  try {
+    const stats = {
+      total_agents: 0,
+      active_agents: 0,
+      total_projects: 0,
+      total_tasks: 0,
+      tasks_by_status: {},
+      tasks_by_type: {}
+    };
+    
+    const results = await Promise.all([
+      pool.query('SELECT COUNT(*) as count FROM agents'),
+      pool.query('SELECT COUNT(*) as count FROM agents WHERE status = $1', ['busy']),
+      pool.query('SELECT COUNT(*) as count FROM projects'),
+      pool.query('SELECT COUNT(*) as count FROM tasks'),
+      pool.query('SELECT status, COUNT(*) as count FROM tasks GROUP BY status'),
+      pool.query('SELECT task_type, COUNT(*) as count FROM tasks GROUP BY task_type')
+    ]);
+    
+    stats.total_agents = parseInt(results[0].rows[0].count);
+    stats.active_agents = parseInt(results[1].rows[0].count);
+    stats.total_projects = parseInt(results[2].rows[0].count);
+    stats.total_tasks = parseInt(results[3].rows[0].count);
+    
+    results[4].rows.forEach(row => {
+      stats.tasks_by_status[row.status] = parseInt(row.count);
+    });
+    
+    results[5].rows.forEach(row => {
+      stats.tasks_by_type[row.task_type] = parseInt(row.count);
+    });
+    
+    res.json(stats);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// 健康检查
+app.get('/health', async (req, res) => {
+  try {
+    await pool.query('SELECT 1');
+    res.json({ status: 'healthy', database: 'connected' });
+  } catch (err) {
+    res.status(503).json({ status: 'unhealthy', error: err.message });
+  }
+});
+
+// 获取本机 IP 地址
+function getLocalIP() {
+  const interfaces = os.networkInterfaces();
+  for (const name of Object.keys(interfaces)) {
+    for (const iface of interfaces[name]) {
+      if (iface.family === 'IPv4' && !iface.internal) {
+        return iface.address;
+      }
+    }
+  }
+  return 'localhost';
+}
+
+// 启动服务器
+app.listen(PORT, '0.0.0.0', () => {
+  const localIP = getLocalIP();
+  console.log(`🚀 多智能体任务服务已启动 (v2.0)`);
+  console.log(`   本地访问: http://localhost:${PORT}`);
+  console.log(`   远程访问: http://${localIP}:${PORT}`);
+});
+
+// 优雅关闭
+process.on('SIGINT', async () => {
+  console.log('\n正在关闭服务...');
+  await pool.end();
+  console.log('数据库连接已关闭');
+  process.exit(0);
+});
\ No newline at end of file