/**
 * [WHO]: sleep()
 * [FROM]: No external dependencies
 * [TO]: Consumed by core/runtime/agent-session.ts
 * [HERE]: core/platform/utils/sleep.ts - sleep helper that respects abort signal; cleans the abort listener on both resolve and reject so repeated sleeps against the same long-lived signal do not stack listeners (Node fires MaxListenersExceededWarning at 11)
 */
export declare function sleep(ms: number, signal?: AbortSignal): Promise<void>;