/**
 * Compute the Levenshtein (edit) distance between two strings.
 * Used for fuzzy matching in error suggestions ("Did you mean...?").
 */
export declare function levenshteinDistance(a: string, b: string): number;
/**
 * Find the closest match to target from candidates within maxDistance.
 * Returns null if no candidate is within maxDistance.
 */
export declare function findClosestMatch(target: string, candidates: string[], maxDistance?: number): string | null;
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