import { type DemoWatchRegistration } from './demoWatchRegistry.js';
export type DemoWatchObservation = {
    key: string | null;
    state: 'completed' | 'failed' | 'timed_out';
    stage: string | null;
    sourceState: string | null;
    code: string | null;
};
type CycleResult = {
    stage: string;
    sourceSync?: {
        state: string;
    };
};
export declare function runDemoSupervisor(input: {
    list: () => Promise<DemoWatchRegistration[]>;
    cycle: (registration: DemoWatchRegistration, signal: AbortSignal) => Promise<CycleResult>;
    intervalMs?: number;
    cycleTimeoutMs?: number;
    concurrency?: number;
    once?: boolean;
    signal?: AbortSignal;
    now?: () => number;
    wait?: (durationMs: number, signal?: AbortSignal) => Promise<void>;
    onObservation?: (observation: DemoWatchObservation) => void;
}): Promise<{
    ok: boolean;
    stage: string;
    polls: number;
    completed: number;
    failures: number;
}>;
export {};
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