import type { Grader, GraderInput, GraderMetadata, GraderResult } from "../types.js";
export declare class CustomMetricsGrader implements Grader {
    metadata: GraderMetadata;
    constructor();
    /** `custom-metrics metrics.json` — the metrics file discriminates. */
    defaultName(config: Record<string, unknown>): string;
    /**
     * A pass condition of pure absence: every assertion checks that a metric is
     * `absent`. Such a config is satisfied by an empty metrics object, so on the
     * `vally oracle` baseline (which synthesizes empty metrics for a withheld
     * `golden_custom_metrics`) it passes correctly and is reported N/A rather than
     * flagged as trivially passing. Any presence/value assertion makes the config
     * a presence assertion (expected to fail on the empty baseline), so all
     * assertions must be `absent` for this to hold.
     */
    assertsAbsence(config: Record<string, unknown>): boolean;
    grade(input: GraderInput): Promise<GraderResult>;
    private resolvePath;
    private normalizeAssertions;
    private normalizeAssertion;
    private loadMetrics;
    private fileFailure;
    private evaluateAssertion;
    private detail;
}
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