import { BaseGrader } from "../baseGrader.js";
import type { Grade, GraderInput, GraderOptions, Input, JSONPath } from "../types.js";
/** Graders that compare the agent output against a value read from the input.
 *  `matchOn` defaults to the first-class `expected` field. */
type MatchOptions = GraderOptions & {
    matchOn?: JSONPath;
};
/** Shared base for graders that compare the output against a value read from the
 *  input via a `matchOn` JSONPath. Centralizes the constructor, the resolved
 *  match path (default `["expected"]`), the description, and the pre-flight check. */
declare abstract class MatchGrader extends BaseGrader {
    protected readonly options: MatchOptions;
    constructor(options: MatchOptions);
    protected matchPath(): JSONPath;
    describe(): string;
    validateInput(input: Input): void;
}
/** Binary: the agent output deep-equals the referenced value. */
export declare class ExactMatchGrader extends MatchGrader {
    protected readonly defaultName = "exact-match";
    protected _run({ input, run }: GraderInput): Promise<Grade>;
    private reference;
}
/** Binary: the stringified agent output contains the referenced needle. */
export declare class ContainsGrader extends MatchGrader {
    protected readonly defaultName = "contains";
    protected _run({ input, run }: GraderInput): Promise<Grade>;
}
/** Scalar: normalized Levenshtein similarity between output and the referenced value. */
export declare class SimilarityGrader extends MatchGrader {
    protected readonly defaultName = "similarity";
    protected _run({ input, run }: GraderInput): Promise<Grade>;
}
export {};