📰 Dev.to · Rosen Hristov

Most e-commerce chatbots hallucinate inventory. I added a preprocessing step that checks the real catalog before the agent runs. Four actions, one extra LLM cal

A single agent with 12 tools dropped half of compound questions. I replaced it with four specialized agents using LangGraph's Send API, state reducers, and LLM-

BM25 handles SKUs and brand names. Vector search handles "gift for a coffee lover." I run both in parallel and merge the results.

I spent three weeks on pure vector search for e-commerce. SKU lookups returned random products. Here's how hybrid search fixed it.