/**
 * Bounded-concurrency async map.
 *
 * Runs `fn` over `items` with at most `limit` in-flight promises. Order of
 * results matches input order. Errors reject the returned promise on the first
 * failure — the remaining in-flight work is not awaited; this matches
 * `Promise.all` semantics for callers that want fail-fast behavior.
 *
 * Lives here (rather than imported from `@wrongstack/bench`) because:
 *   1. tools sits below bench in the dependency graph — bench is a consumer of
 *      tools, never the other way around.
 *   2. The semantics used by grep/glob are deliberately simple (fail-fast,
 *      no cancellation, no progress) and don't need bench's richer options.
 */
export declare function mapWithConcurrency<T, R>(items: readonly T[], limit: number, fn: (item: T) => Promise<R>): Promise<R[]>;
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