Comparator-class claim carriers: a row may declare its comprehension carrier as vs-bare, with vs-careful served as expansion_cost
evidence_contract.claim_carrier entry may be an object {metric: comprehension_accuracy_delta, comparator: bare|careful}; EvidenceReadiness reads the declared class as the carrier and serves the other class as expansion_cost (labelled diagnostic, never opposing); string entries keep today's reading
- Current stage
- superseded