import type { ContextItem } from '../types';
/**
 * Apply recency bias to an ordered list of items.
 *
 * Items closer to the end of the array (most recent) retain more of their
 * score. Items at the beginning (oldest) are decayed down to `minFactor`.
 *
 * Items that are already `required` priority are never decayed.
 */
export declare function applyRecencyBias(items: ContextItem[], options?: {
    minFactor?: number;
}): void;