Volume 4 of the Spark 4.0 from Scratch series. The practitioner field manual for production AI on Databricks in 2026. Databricks SQL in production, AI/BI Dashboards, AI/BI Genie, the AI SQL function family (ai_query, vector_search, ai_parse_document, ai_classify, ai_extract, ai_gen, ai_forecast), Model Serving and the AI Gateway, Foundation Model APIs and external models, Mosaic AI Vector Search and RAG patterns, MLflow 3 (experiments, UC Model Registry, traces, evaluation), Feature Store on Unity Catalog, full MLOps (promotion, aliases, champion/challenger, traffic splitting), Lakehouse Monitoring for drift, distributed deep learning (TorchDistributor, DeepSpeed, Ray, serverless GPU), Agent Bricks classification and information extraction, the Multi-Agent Supervisor with MCP, Lakebase managed Postgres in the Lakehouse, an end-to-end retail capstone, and the certification roadmap.https://www.genaiblueprints.com/en-ushttps://www.genaiblueprints.com/blog/welcome/https://www.genaiblueprints.com/blog/welcome/Short field notes between book updates, releases, patterns, and the parts of Databricks platform + AI that change too fast for a book to keep up with.Sun, 17 May 2026 00:00:00 GMT