MCP Prompt Server

Implementation Reference

• src/index.js:155-172 (registration)

  Registration of the 'get_prompt_names' tool using server.tool(), including empty input schema, inline handler, and description.

  server.tool(
    "get_prompt_names",
    {},
    async () => {
      const promptNames = loadedPrompts.map(p => p.name);
      return {
        content: [
          {
            type: "text",
            text: `可用的prompts (${promptNames.length}):\n${promptNames.join('\n')}`
          }
        ]
      };
    },
    {
      description: "获取所有可用的prompt名称"
    }
  );

• src/index.js:158-168 (handler)

  Inline handler function for 'get_prompt_names' that extracts names from loadedPrompts and returns them as a text content response.

  async () => {
    const promptNames = loadedPrompts.map(p => p.name);
    return {
      content: [
        {
          type: "text",
          text: `可用的prompts (${promptNames.length}):\n${promptNames.join('\n')}`
        }
      ]
    };
  },

• src/index.js:157-157 (schema)

  Empty input schema object for the 'get_prompt_names' tool (no parameters required).

  {},

• src/index.js:22-65 (helper)

  loadPrompts function that loads prompt files from 'prompts' directory into the global loadedPrompts array, used by the get_prompt_names handler.

  async function loadPrompts() {
    try {
      // 确保prompts目录存在
      await fs.ensureDir(PROMPTS_DIR);
      
      // 读取prompts目录中的所有文件
      const files = await fs.readdir(PROMPTS_DIR);
      
      // 过滤出YAML和JSON文件
      const promptFiles = files.filter(file => 
        file.endsWith('.yaml') || file.endsWith('.yml') || file.endsWith('.json')
      );
      
      // 加载每个prompt文件
      const prompts = [];
      for (const file of promptFiles) {
        const filePath = path.join(PROMPTS_DIR, file);
        const content = await fs.readFile(filePath, 'utf8');
        
        let prompt;
        if (file.endsWith('.json')) {
          prompt = JSON.parse(content);
        } else {
          // 假设其他文件是YAML格式
          prompt = YAML.parse(content);
        }
        
        // 确保prompt有name字段
        if (!prompt.name) {
          console.warn(`Warning: Prompt in ${file} is missing a name field. Skipping.`);
          continue;
        }
        
        prompts.push(prompt);
      }
      
      loadedPrompts = prompts;
      console.log(`Loaded ${prompts.length} prompts from ${PROMPTS_DIR}`);
      return prompts;
    } catch (error) {
      console.error('Error loading prompts:', error);
      return [];
    }
  }