spex-mcp/bin/spex-mcp.js

MCP server for Figma SpeX plugin and Cursor AI integration

#!/usr/bin/env node

// For MCP server communication, stdout must be reserved for JSON-RPC
// All diagnostic output must go to stderr

import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
import { pathToFileURL } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// Function to safely redirect output to stderr
function logToStderr(message) {
    process.stderr.write(message + '\n');
}

async function main() {
    try {
        // Resolve the main module path
        const mainModulePath = join(__dirname, '..', 'src', 'index.js');
        const mainModuleUrl = pathToFileURL(mainModulePath);
        
        // Import and start the main module
        await import(mainModuleUrl);
        
    } catch (error) {
        // All error output goes to stderr to preserve stdout for MCP communication
        if (error.code === 'ERR_MODULE_NOT_FOUND') {
            logToStderr('❌ Dependencies not found. Please install spex-mcp properly:');
            logToStderr('');
            logToStderr('Global installation:');
            logToStderr('  npm install -g spex-mcp');
            logToStderr('');
            logToStderr('Local installation:');
            logToStderr('  npm install spex-mcp');
            logToStderr('  npx spex-mcp');
            logToStderr('');
            logToStderr('Or run directly from source:');
            logToStderr('  git clone <repository>');
            logToStderr('  cd spex-mcp');
            logToStderr('  npm install');
            logToStderr('  npm start');
            logToStderr('');
            logToStderr(`Error details: ${error.message}`);
        } else {
            logToStderr(`❌ Error starting SpeX MCP server: ${error.message}`);
        }
        process.exit(1);
    }
}

// Run the main function
main().catch((error) => {
    logToStderr(`❌ Unexpected error: ${error.message}`);
    process.exit(1);
});