import { type Rng } from "./rng.js";
export type Scored<T> = {
    item: T;
    scores: number[];
};
/** Candidates that achieve the best score on at least one input, with their win counts.
 *  GEPA's "best on ≥1 input" frontier — NOT full multi-objective dominance. */
export declare function paretoFrontier<T>(pool: Scored<T>[]): {
    item: T;
    wins: number;
}[];
/** Sample a frontier member weighted by how many inputs it wins. */
export declare function sampleFrontier<T>(pool: Scored<T>[], rng: Rng): T;