Deep Code Reasoning MCP Server

// Example: E-commerce service with performance issues // This demonstrates a typical N+1 query pattern that Claude Code might struggle to identify import { Database } from './database'; class OrderService { private db: Database; constructor(db: Database) { this.db = db; } // Problematic function with N+1 query pattern async getOrdersWithDetails(userId: string) { // First query: Get all orders for user const orders = await this.db.query( 'SELECT * FROM orders WHERE user_id = ?', [userId] ); // N+1 Problem: For each order, fetch additional data for (const order of orders) { // Additional query for each order (N queries) order.items = await this.db.query( 'SELECT * FROM order_items WHERE order_id = ?', [order.id] ); // Another N queries for customer info order.customer = await this.db.query( 'SELECT * FROM customers WHERE id = ?', [order.customer_id] ); // And N more for shipping info order.shipping = await this.db.query( 'SELECT * FROM shipping_info WHERE order_id = ?', [order.id] ); } return orders; } // Another issue: Memory leak with event listeners startOrderMonitoring() { // Setting up interval without cleanup setInterval(() => { this.checkPendingOrders(); }, 5000); // Adding event listener without removal process.on('order-update', (orderId) => { this.updateOrderCache(orderId); }); } private orderCache: Map<string, any> = new Map(); private async checkPendingOrders() { const pendingOrders = await this.db.query( 'SELECT * FROM orders WHERE status = ?', ['pending'] ); // Potential memory leak: cache grows indefinitely for (const order of pendingOrders) { this.orderCache.set(order.id, order); } } private updateOrderCache(orderId: string) { // Update cache logic } } // Example of cross-service dependency class InventoryService { async updateStock(orderItems: any[]) { // This service is called by OrderService // Changes here could break OrderService for (const item of orderItems) { await this.decrementStock(item.product_id, item.quantity); } } private async decrementStock(productId: string, quantity: number) { // Complex state management that could have race conditions const currentStock = await this.getStock(productId); if (currentStock >= quantity) { await this.setStock(productId, currentStock - quantity); } } private async getStock(productId: string): Promise<number> { // Fetch current stock return 0; } private async setStock(productId: string, quantity: number): Promise<void> { // Update stock } }