/** Default cancel-poll cadence. Snappier than the 60s credit poll so a user's cancel lands within a few
 *  seconds; each poll is a cheap brokered run-status read. */
export declare const DEFAULT_CANCEL_CHECK_INTERVAL_MS = 5000;
export interface CancelWatcherDeps {
    /** The run being watched (for correlation/logging). */
    runId: string;
    /** Resolves true once the run has been asked to cancel. Brokered
     *  (`RunnerControlClient.checkCancelled` → `GET /cancel`), so the runner never reads the DB. */
    isCancelled: () => Promise<boolean>;
    /** Fired exactly once the first time the run is seen to be cancelled. */
    onCancelled: () => void;
    intervalMs?: number;
}
export declare class CancelWatcher {
    private readonly deps;
    private timer;
    private firing;
    private cancelled;
    private stopped;
    constructor(deps: CancelWatcherDeps);
    /** Begin periodic cancel checks. */
    start(): void;
    /** Stop checking and drain any in-flight check. Idempotent. */
    stop(): Promise<void>;
    /** Whether a cancel was detected (the orchestrator may read this to shape the terminal result). */
    wasCancelled(): boolean;
    /** True once the watcher should no longer act. A method (not an inline field read) so it's
     *  re-evaluated after an `await` — `stop()` can flip `stopped` mid-check. */
    private done;
    private check;
}