War Story: LangChain 0.3 RAG Pipeline Hallucinated 15% of Answers in Production, Here's How We Fixed It

In Q3 2024, our production LangChain 0.3 RAG pipeline hallucinated 15% of customer support answers, costing us $22,000 in SLA penalties, 12% churn among enterprise clients, and a formal incident report filed by our largest customer before we traced t...