import type { Grader, GraderInput, GraderResult } from "../../graders/types.js";
export declare class ValidRefsGrader implements Grader {
    metadata: {
        name: string;
        description: string;
        behavior: {};
        determinism: "static";
        reference: "reference-free";
        temporalScope: "point-in-time";
        costProfile: "free";
    };
    grade(input: GraderInput): Promise<GraderResult>;
    private gradeSkill;
}
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