Router policy lab

FUNCTION route_request(request, policy, population)
    contract <- VALIDATE_REQUEST_CONTRACT(request)
    candidates <- FILTER_BY_CAPABILITY(population, contract)
    candidates <- FILTER_BY_DATA_BOUNDARY(candidates, request.privacy_tier)
    candidates <- FILTER_BY_HEALTH_AND_BUDGET(candidates, policy.budget)

    IF candidates.empty THEN
        RETURN NO_OP_OR_HUMAN_REVIEW("no eligible model")
    END IF

    ranked <- RANK_BY_CONFIDENCE_COST_AND_TRACEABILITY(candidates)
    IF ranked.best.confidence < policy.minimum_confidence THEN
        RETURN ESCALATE_OR_ABSTAIN(ranked)
    END IF

    RETURN ranked.best
END FUNCTION