/**
 * Bounded-concurrency async iteration helper. Used to parallelize
 * I/O-bound network calls (e.g. `fetchItemData` for each item in a
 * serialization pull) without blasting unbounded request fans out at
 * Sitecore — which would hit rate limits, exhaust local sockets, or
 * blow up memory holding too many in-flight Response bodies.
 *
 * Results preserve input order. The first failure aborts: pending
 * tasks are not started, in-flight tasks are awaited then their
 * results discarded.
 *
 * Default concurrency is 8 (conservative for typical XM Cloud rate
 * limits). Override via `SITECOREAI_HTTP_CONCURRENCY`.
 */
export declare const DEFAULT_CONCURRENCY = 8;
export declare const resolveDefaultConcurrency: () => number;
export interface MapWithConcurrencyOptions {
    concurrency?: number;
}
export declare const mapWithConcurrency: <T, R>(items: readonly T[], worker: (item: T, index: number) => Promise<R>, options?: MapWithConcurrencyOptions) => Promise<R[]>;
/**
 * Sleep for `ms`, optionally abortable via `signal` so a Ctrl-C during a
 * backoff wait exits promptly (rejects with "aborted"). Without a signal it
 * is a plain timeout. Canonical home — do not re-declare per module.
 */
export declare const sleep: (ms: number, signal?: AbortSignal) => Promise<void>;