GitHub PR Review Server

#!/usr/bin/env node import { Server } from '@modelcontextprotocol/sdk/server/index.js'; import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'; import { CallToolRequestSchema, ListToolsRequestSchema, McpError, ErrorCode, } from '@modelcontextprotocol/sdk/types.js'; import { GitHubService } from './services/github.js'; import { ConfigService } from './services/config.js'; import { AnalysisService } from './services/analysis.js'; import dotenv from 'dotenv'; import { toolDefinitions, toolHandlers } from './tools/index.js'; // Load environment variables dotenv.config(); class GitHubMCPServer { constructor() { this.server = new Server( { name: 'github-mcp-server', version: '1.0.0', }, { capabilities: { tools: {}, }, } ); this.config = new ConfigService(); this.github = new GitHubService(this.config.get('GITHUB_TOKEN')); this.analysis = new AnalysisService(); this.setupToolHandlers(); } setupToolHandlers() { // Register dynamic list tools handler based on shared tool definitions this.server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: toolDefinitions, })); // Register dynamic call-tool handler which delegates to shared handlers this.server.setRequestHandler(CallToolRequestSchema, async request => { const { name, arguments: args } = request.params; const handler = toolHandlers[name]; if (!handler) { throw new McpError( ErrorCode.MethodNotFound, `Unknown tool: ${name}` ); } try { // Determine expected arguments based on handler arity if (handler.length === 3) { // Handlers that also need the analysis service return await handler(this.github, this.analysis, args); } // Default case: handlers expecting only the GitHub service and args return await handler(this.github, args); } catch (error) { throw new McpError( ErrorCode.InternalError, `Tool execution failed: ${error.message}` ); } }); } // Duplicate handler implementations have been removed. // All tool logic is now centralized in ./tools with shared handlers. async run() { const transport = new StdioServerTransport(); await this.server.connect(transport); console.error('GitHub MCP server running on stdio'); } } const server = new GitHubMCPServer(); server.run().catch(console.error);