Prompts MCP Server

#!/usr/bin/env node /** * Main entry point for the prompts MCP server */ import { Server } from '@modelcontextprotocol/sdk/server/index.js'; import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'; import { CallToolRequestSchema, ListToolsRequestSchema, } from '@modelcontextprotocol/sdk/types.js'; import path from 'path'; import { fileURLToPath } from 'url'; import { PromptCache } from './cache.js'; import { PromptFileOperations } from './fileOperations.js'; import { PromptTools } from './tools.js'; import { ServerConfig } from './types.js'; // Server configuration const __filename = fileURLToPath(import.meta.url); const __dirname = path.dirname(__filename); // Read configuration from environment or use defaults const promptsFolderPath = process.env.PROMPTS_FOLDER_PATH; const defaultPromptsDir = path.join(__dirname, '..', 'prompts'); const config: ServerConfig = { name: 'prompts-mcp-server', version: '1.0.0', promptsDir: promptsFolderPath || defaultPromptsDir, ...(promptsFolderPath && { prompts_folder_path: promptsFolderPath }), }; // Initialize components const cache = new PromptCache(config.promptsDir); const fileOps = new PromptFileOperations(config.promptsDir, cache); const tools = new PromptTools(fileOps); // Create MCP server const server = new Server( { name: config.name, version: config.version, }, { capabilities: { tools: {}, }, } ); // Register tool handlers server.setRequestHandler(ListToolsRequestSchema, async () => { return tools.getToolDefinitions(); }); server.setRequestHandler(CallToolRequestSchema, async (request) => { return await tools.handleToolCall(request); }); /** * Main server startup function */ async function main(): Promise<void> { try { // Initialize cache and file watcher on startup await cache.initializeCache(); cache.initializeFileWatcher(); // Connect to stdio transport const transport = new StdioServerTransport(); await server.connect(transport); console.error('Prompts MCP Server running on stdio'); } catch (error) { const errorMessage = error instanceof Error ? error.message : 'Unknown error'; console.error('Failed to start server:', errorMessage); process.exit(1); } } /** * Graceful shutdown handler */ async function shutdown(): Promise<void> { console.error('Shutting down server...'); try { await cache.cleanup(); console.error('Server shutdown complete'); } catch (error) { const errorMessage = error instanceof Error ? error.message : 'Unknown error'; console.error('Error during shutdown:', errorMessage); } process.exit(0); } // Handle shutdown signals process.on('SIGINT', shutdown); process.on('SIGTERM', shutdown); // Start the server main().catch((error: unknown) => { const errorMessage = error instanceof Error ? error.message : 'Unknown error'; console.error('Server error:', errorMessage); process.exit(1); });