A reference architecture for conversational and autonomous-agent AI built on the Azure Databricks Lakehouse — from data ingestion and processing to consumption and governance — with Unity Catalog as the single access-control and audit plane, customer-managed encryption, private networking, and Mosaic AI Gateway guardrails. Vertex AI and Gemini plug in as a multi-cloud model option, and every layer is continuously tested, evaluated, and monitored for data and model drift.