refactor: reorganize documentation and configuration files for improved clarity

src/mcp/index.ts

@@ -3,12 +3,45 @@
 import { N8NDocumentationMCPServer } from './server-update';
 import { logger } from '../utils/logger';
 
+// Add error details to stderr for Claude Desktop debugging
+process.on('uncaughtException', (error) => {
+  console.error('Uncaught Exception:', error);
+  logger.error('Uncaught Exception:', error);
+  process.exit(1);
+});
+
+process.on('unhandledRejection', (reason, promise) => {
+  console.error('Unhandled Rejection at:', promise, 'reason:', reason);
+  logger.error('Unhandled Rejection:', reason);
+  process.exit(1);
+});
+
 async function main() {
   try {
+    console.error('Starting n8n Documentation MCP Server...');
+    console.error('Current directory:', process.cwd());
+    console.error('Script directory:', __dirname);
+    console.error('Node version:', process.version);
+    
     const server = new N8NDocumentationMCPServer();
     await server.run();
   } catch (error) {
+    console.error('Failed to start MCP server:', error);
     logger.error('Failed to start MCP server', error);
+    
+    // Provide helpful error messages
+    if (error instanceof Error && error.message.includes('nodes.db not found')) {
+      console.error('\nTo fix this issue:');
+      console.error('1. cd to the n8n-mcp directory');
+      console.error('2. Run: npm run build');
+      console.error('3. Run: npm run rebuild');
+    } else if (error instanceof Error && error.message.includes('NODE_MODULE_VERSION')) {
+      console.error('\nTo fix this Node.js version mismatch:');
+      console.error('1. cd to the n8n-mcp directory');
+      console.error('2. Run: npm rebuild better-sqlite3');
+      console.error('3. If that doesn\'t work, try: rm -rf node_modules && npm install');
+    }
+    
     process.exit(1);
   }
 }

src/mcp/server-update.ts

@@ -5,6 +5,8 @@ import {
   ListToolsRequestSchema,
 } from '@modelcontextprotocol/sdk/types.js';
 import Database from 'better-sqlite3';
+import { existsSync } from 'fs';
+import path from 'path';
 import { n8nDocumentationTools } from './tools-update';
 import { logger } from '../utils/logger';
 
@@ -31,7 +33,34 @@ export class N8NDocumentationMCPServer {
   private db: Database.Database;
 
   constructor() {
-    this.db = new Database('./data/nodes.db');
+    // Try multiple database paths
+    const possiblePaths = [
+      path.join(process.cwd(), 'data', 'nodes.db'),
+      path.join(__dirname, '../../data', 'nodes.db'),
+      './data/nodes.db'
+    ];
+    
+    let dbPath: string | null = null;
+    for (const p of possiblePaths) {
+      if (existsSync(p)) {
+        dbPath = p;
+        break;
+      }
+    }
+    
+    if (!dbPath) {
+      logger.error('Database not found in any of the expected locations:', possiblePaths);
+      throw new Error('Database nodes.db not found. Please run npm run rebuild first.');
+    }
+    
+    try {
+      this.db = new Database(dbPath);
+      logger.info(`Initialized database from: ${dbPath}`);
+    } catch (error) {
+      logger.error('Failed to initialize database:', error);
+      throw new Error(`Failed to open database: ${error instanceof Error ? error.message : 'Unknown error'}`);
+    }
+    
     logger.info('Initializing n8n Documentation MCP server');
     
     this.server = new Server(