A — 0: The same examples guide training and prove success, or no test exists. B — 1: A holdout exists, but related templates, customer groups or synthetic lineage have not been checked. C — 2: The buyer controls a locked test with a justified split, access limits and leakage checks.
Evidence to attach: split manifest and access record. If weak: rebuild the test before awarding a performance-based pilot. Group-aware splitting can help implement separation, but cannot certify it automatically.