A data pipeline is the plumbing of an AI system — the automated flow that moves data from its source (user interactions, annotation queues, evaluation runs) through transformation steps and into the systems that need it (training data repositories, dashboards, evaluation frameworks). Well-designed pipelines are reliable, reproducible, and auditable — you should be able to trace where any piece of data came from and what happened to it along the way. In behavior architecture work, data pipelines matter because they determine the freshness and quality of the signals you use to understand and improve model behavior. Pipelines that silently drop data, introduce inconsistencies, or don’t version their transformations are a hidden source of behavioral problems.