/**
 * Jaro-Winkler distance between two strings.
 * Returns a value between 0 (no match) and 1 (exact match).
 */
export declare function jaroWinkler(s1: string, s2: string): number;
import type { SinkRecord } from '../../types.js';
/**
 * Find fuzzy name matches within the same email domain.
 * Only compares records not already marked as duplicates.
 */
export declare function fuzzyMatch(records: SinkRecord[], threshold?: number): SinkRecord[];