Building a Chat Assistant Module for Magento 2: Observers, Message Queues, and 10K Products

Magento stores are large. Not WooCommerce "500 products with a few categories" large. Magento stores run 10,000+ SKUs, configurable products with dozens of variations, multiple store views for different languages, and Multi-Source Inventory across warehouses. I built Emporiqa , a chat assistant for e-commerce stores. After shipping integrations for Drupal Commerce , WooCommerce, and Sylius, Magento was next. The catalog complexity made it the most interesting one to build. Here's how the module works under the hood. The Problem: Chat That Knows Nothing Most chat solutions for Magento are JavaScript widgets that sit on the page and know nothing about your catalog. Customer asks "do you have running shoes under 80 euros in size 42?" The widget either sends them to the search page or gives a generic response. To answer product questions, the chat assistant needs the actual catalog data: product names, descriptions, prices, stock levels, categories, images, and variation attributes. For Ma