This post is part of a series that explores proven strategies and practical examples for building reliable AI systems. New to n8n? Start with the introduction.Find out when new topics are added to the Production AI Playbook via RSS, LinkedIn or X.The Silent Drift ProblemYour AI workflow passed every test. Classifications were accurate. Responses were on-point. You shipped it, and for two weeks, everything looked great. Then support tickets started trickling in. Customers were getting responses that missed the point. Classifications were landing in the wrong buckets. Nothing broke.