/**
 * Map over `items` running at most `limit` invocations of `mapper` at once,
 * resolving to results in input order. Mirrors `Promise.allSettled`: the
 * returned promise never rejects — a `mapper` that throws produces a
 * `{ status: "rejected", reason }` slot and the remaining work continues.
 *
 * Use instead of `Promise.allSettled(items.map(mapper))` whenever each task is
 * heavyweight (spawns a process, holds memory, hits a rate-limited API): an
 * unbounded fan-out over N items spawns N tasks at once and falls over at
 * scale, whereas this keeps a fixed working set regardless of N.
 *
 * `limit` is clamped to `[1, items.length]`.
 */
export declare function mapSettledWithConcurrency<T, R>(items: readonly T[], limit: number, mapper: (item: T, index: number) => Promise<R>): Promise<Array<PromiseSettledResult<R>>>;