server.js

#!/usr/bin/env node
/**
 * Modular MCP Server - Zero Dependencies
 *
 * A config-driven MCP server that loads plugins/tools from a JSON config file.
 * Implements the Model Context Protocol (JSON-RPC 2.0 over stdio).
 */

import { readFileSync } from 'fs';
import { resolve } from 'path';
import PluginManager from './core/plugin-manager.js';
import { createServer } from './core/mcp-protocol.js';
import { logger } from './core/logger.js';

const CONFIG_FILE = process.argv[2] || 'config.json';

async function main() {
  try {
    // Load configuration
    const configPath = resolve(CONFIG_FILE);
    logger.info(`Loading configuration from: ${configPath}`);

    const configData = readFileSync(configPath, 'utf8');
    const config = JSON.parse(configData);

    // Initialize plugin manager
    const pluginManager = new PluginManager(config);
    await pluginManager.loadPlugins();

    logger.info(`Loaded ${pluginManager.getToolCount()} tools from ${pluginManager.getPluginCount()} plugins`);

    // Create and start MCP server
    const server = createServer(pluginManager, config);

    logger.info('MCP Server started - waiting for requests on stdin/stdout');

    // Start listening on stdin/stdout
    server.listen();

  } catch (err) {
    logger.error('Failed to start MCP server:', err.message);
    process.exit(1);
  }
}

main();