/**
 * A signal that aborts when any of its sources does, and can be let go of.
 *
 * `AbortSignal.any()` cannot be undone: in Node 22 a source signal keeps a reference for every signal
 * ever composed from it, about half a kilobyte each, for as long as the source lives. A graph composes
 * one per task attempt from the run's signal, so a long-lived signal shared by many runs — a server's,
 * a worker's — grew without bound. A linked signal listens to its sources directly and `dispose()`
 * removes the listeners, so a finished attempt keeps nothing.
 */
export interface LinkedSignal {
    /** Aborts, with that source's reason, when any source aborts. */
    readonly signal: AbortSignal;
    /** Stops listening to the sources. Safe to call more than once. */
    dispose(): void;
}
/** Links the given signals; missing ones are ignored, and one signal is returned as it is. */
export declare function linkSignals(sources: ReadonlyArray<AbortSignal | undefined>): LinkedSignal;