How We Built AI Search for WooCommerce Using RAG

TL;DR: Default WooCommerce search is a glorified blog search engine. We built a RAG-based AI search layer that understands natural language queries like "running shoes under $120" and translates them into structured product retrieval. Here's the full architecture, code, and lessons learned. WooCommerce powers over 6M online s. Yet one core feature still behaves almost the same way it did a decade ago: product search. Most s rely on the default WordPress search system, which was never designed for e-commerce. It was designed for finding blog posts.