interface ScheduleState {
  nextAt: number;
  consecutiveUnchanged: number;
  policyVersion: number;
}
interface SchedulePolicy {
  readonly version: number;
  initial: (now: number) => ScheduleState;
  observe: (prev: ScheduleState, evt: {
    changed: boolean;
    at: number;
  }) => ScheduleState;
  isDue: (state: ScheduleState, now: number) => boolean;
}
declare const sitemapPolicy: SchedulePolicy;
type InspectionVerdict = 'PASS' | 'FAIL' | 'NEUTRAL';
declare function inspectionPolicy(verdict: InspectionVerdict): SchedulePolicy;
declare function fixedPolicy(intervalMs: number): SchedulePolicy;
export { InspectionVerdict, SchedulePolicy, ScheduleState, fixedPolicy, inspectionPolicy, sitemapPolicy };