/**
 * output-matches grader — check agent output against a regex pattern.
 */
import type { Grader, GraderInput, GraderMetadata, GraderResult } from "../../index.js";
export declare class OutputMatchesGrader implements Grader {
    metadata: GraderMetadata;
    private readonly negated;
    constructor(name?: "output-matches" | "output-not-matches");
    /** `output-matches /Cosmos/` — the pattern is what distinguishes instances. */
    defaultName(config: Record<string, unknown>): string;
    /** Negated (`output-not-matches`, or `negate: true`) asserts the output does not match the pattern. */
    assertsAbsence(config: Record<string, unknown>): boolean;
    grade(input: GraderInput): Promise<GraderResult>;
}
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