import type { SchedulerDeps } from "@nanobpm/urban/runtime";
/** A `SchedulerDeps` backed by a virtual clock the test author advances explicitly. */
export interface ManualScheduler extends SchedulerDeps {
    /** Advance the virtual clock by `ms`, firing every timer due within the interval (in
     *  ascending order) and draining each timer's async follow-on before the next fires. */
    advance(ms: number): Promise<void>;
    /** Fire every timer already due at the current time (no clock movement), draining each
     *  timer's async follow-on. Returns the number of timers fired — a fixpoint signal for
     *  `settle()`: zero means nothing was pending. */
    fireDue(): Promise<number>;
    /** How many timers are currently armed (unfired). */
    pending(): number;
}
/** Create a {@link ManualScheduler} whose virtual clock starts at `epochMs` (default 0). An
 *  optional `signal` is surfaced on the returned seam so {@link schedulerClock} can cancel a
 *  handler parked on `app.wait()` at shutdown (see {@link SchedulerDeps.signal}); the scheduler's
 *  own timer bookkeeping is unaffected by it. */
export declare function createManualScheduler(epochMs?: number, signal?: AbortSignal): ManualScheduler;