import type { Grade } from "./types.js";
/**
 * Combine the k single-shot trials of one grader into a single Grade.
 * Scalar scores are averaged; binary scores use `any`/`all`; feedback is the
 * newline-joined non-empty feedback across trials (undefined if none).
 *
 * Throws on an empty trials array: an empty `every`/`some` would silently
 * report a passing binary grade. Callers guarantee at least one trial.
 */
export declare function aggregateGrades(trials: Grade[], mode: "any" | "all"): Grade;