export declare function levenshtein(a: string, b: string): number;
/**
 * Find the candidate string closest to `name` by edit distance. Returns null
 * when no candidate is close enough to be a likely typo (max 2 edits, and the
 * distance must be strictly less than the input's own length so a totally
 * unrelated short name doesn't trigger).
 */
export declare function closestNameTo(name: string, candidates: Iterable<string>): string | null;
/**
 * Build the trailing " Did you mean 'X'?" hint for a rejection against a closed
 * set of names — the canonical way to satisfy the closest-name DX mandate (see
 * the error-consistency rules in CLAUDE.md). Returns "" when no candidate is
 * close enough, so the call site can interpolate the result unconditionally.
 *
 * `format` renders the suggestion the way the surrounding message spells the
 * name: the default is the instance-method form (`.foo()`); pass
 * `(s) => \`Class.\${s}\`` for statics, or `(s) => s` for bare names (stages).
 */
export declare function didYouMean(name: string, candidates: Iterable<string>, format?: (s: string) => string): string;
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