export interface BgWaitGuard {
    /** Re-arm timers after a chained continuation reported new remaining counts.
     *  rearm(0, 0) settles immediately. No-op once settled. */
    rearm(running: number, undelivered: number): void;
    /** Idempotent: clears timers and releases the busy bracket exactly once. */
    settle(): void;
    readonly settled: boolean;
}
export interface BgWaitGuardOpts {
    running: number;
    undelivered: number;
    /** Busy bracket (trackPendingTask). +1 at start, -1 on settle. */
    track: (delta: number) => void;
    /** Fired when undelivered-only work produced no notification within the grace period. */
    onGraceTimeout: () => void;
    /** Fired when running work exceeded the max-wait cap. */
    onMaxWait: () => void;
    graceMs?: number;
    maxWaitMs?: number;
    /** Injectable timers for tests. Production timers are unref'd (never hold the loop). */
    timers?: {
        set: (fn: () => void, ms: number) => unknown;
        clear: (h: unknown) => void;
    };
}
import { getBgGraceMs, getBgMaxWaitMs } from '../agent-adapter/bg-wait.js';
export { getBgGraceMs, getBgMaxWaitMs };
export declare function startBgWaitGuard(opts: BgWaitGuardOpts): BgWaitGuard;