Segment Protocols treats a Tracking Plan as the central source of truth for what events, properties, and values a data pipeline should accept. It detects violations against connected sources in real time and can block or quarantine offending events before they reach downstream destinations. Transformations can then repair events that do not conform to the plan.

Because the plan is enforced inside the customer data platform rather than after the fact, violations surface at the point of capture. The capability targets the same buyer problem as capture-side event data quality tooling.