/**
 * Pairwise Comparison utility module.
 *
 * Provides schedule generation for head-to-head matchups and
 * Bradley-Terry MLE estimation for computing priority scores.
 */
export interface PairwiseMatchup {
    matchupIndex: number;
    leftValue: string;
    rightValue: string;
}
export interface PairwiseMatchupAnswer {
    matchupIndex: number;
    leftValue: string;
    rightValue: string;
    winnerValue: string;
}
/**
 * Generate a pairwise comparison schedule for the given items.
 *
 * - If S <= 8: generates ALL S*(S-1)/2 unique pairs (Req 15.1)
 * - If S > 8: generates a balanced subset where each item appears
 *   approximately equally (Req 15.2)
 *
 * @param itemValues Array of item value strings advancing to the Pairwise step
 * @returns Array of PairwiseMatchup objects
 */
export declare function generatePairwiseSchedule(itemValues: string[]): PairwiseMatchup[];
/**
 * Compute Bradley-Terry scores from pairwise matchup results using
 * iterative maximum likelihood estimation.
 *
 * The Bradley-Terry model estimates a "strength" parameter for each item
 * such that P(i beats j) = strength_i / (strength_i + strength_j).
 *
 * If MLE does not converge within 100 iterations, falls back to raw
 * win-rate proportions.
 *
 * @param matchups Array of completed matchup answers
 * @returns Map of item value → score, sorted by score descending (Req 7.7)
 */
export declare function computeBradleyTerryScores(matchups: PairwiseMatchupAnswer[]): Map<string, number>;