mcp-apps-project-standard

Development

MCP Apps项目规范 - 后端驱动UI渲染架构。所有页面由后端生成HTML通过MCP协议返回渲染。Invoke when developing or maintaining MCP Apps projects, especially when creating new pages, tools, or stores.

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MCP Apps 项目规范

核心架构原则

后端驱动UI渲染（MVP模式）

Model（数据层）：后端存储和管理所有业务数据
View（视图层）：前端仅负责渲染，不包含业务逻辑
Presenter（展示层）：后端生成完整的HTML页面，通过MCP协议返回

数据流向

用户操作 → iframe → postMessage → MCP Host → MCP Tool Call → 后端处理 → 返回结果
                                                              │
                                                              ▼
                                                     更新数据/生成新UI
                                                              │
                                                              ▼
                                                     返回UI Resource → 重新渲染iframe

目录结构

src/
├── components/           # 前端组件（仅Host）
│   └── MCPHost.tsx      # MCP客户端Host
├── server/              # 后端服务
│   ├── tools/           # MCP工具定义
│   ├── ui/              # UI页面生成器（HTML模板）
│   ├── stores/          # 数据存储层
│   └── index.ts         # 服务器入口
├── shared/              # 共享类型定义
├── App.tsx              # 前端入口
└── main.tsx             # React挂载点

工具命名规范

工具类型	命名格式	示例
UI获取	`get{PageName}UI`	`getFamilyTreeUI`, `getMemberManageUI`
数据查询	`list{Entity}`, `get{Entity}`	`listFamilies`, `getMemberById`
数据创建	`create{Entity}`	`createFamily`, `createMember`
数据更新	`update{Entity}`	`updateFamily`, `updateMember`
数据删除	`delete{Entity}`	`deleteFamily`, `deleteMember`

UI页面生成规范

HTML模板结构

<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>页面标题</title>
  <script src="https://cdn.tailwindcss.com"></script>
  <style>/* 自定义样式 */</style>
</head>
<body class="bg-gray-100 min-h-screen p-4">
  <!-- 页面内容 -->
  <script>
    function mcpCallTool(toolName, params) {
      return new Promise((resolve, reject) => {
        const messageId = 'msg-' + Date.now() + '-' + Math.random();
        const handler = (event) => {
          if (event.data && event.data.messageId === messageId) {
            window.removeEventListener('message', handler);
            if (event.data.error) {
              reject(new Error(event.data.error));
            } else {
              resolve(event.data.response);
            }
          }
        };
        window.addEventListener('message', handler);
        window.parent.postMessage({
          messageId: messageId,
          type: 'tool',
          payload: { toolName, params }
        }, '*');
      });
    }
  </script>
</body>
</html>

样式规范

主色调：绿色系列 (#10B981)
辅助色：蓝色系列 (#3B82F6)
成功色：#10B981
警告色：#F59E0B
错误色：#EF4444

JavaScript规范

防抖机制：防止重复请求导致界面闪烁
innerHTML渲染：使用innerHTML一次性渲染，优化性能
错误处理：完善的错误捕获和用户提示

开发工作流

创建数据存储（Store）
创建MCP工具（Tools）
创建UI页面（HTML）
注册工具到Server
更新前端菜单
测试验证

质量保证

使用严格模式TypeScript
使用Zod进行参数验证
完善的错误处理
防抖机制防止闪烁
输入验证防止XSS