export type CronScheduleField = 'schedule' | 'timezone' | 'until';
export interface CronScheduleValidationError {
    field: CronScheduleField;
    message: string;
}
export interface CronScheduleInput {
    schedule: unknown;
    timezone?: unknown;
    until?: unknown;
}
/** Validate with the same cron parser used by the scheduler plus the platform's
 * IANA timezone implementation. This is safe to call before any persistence. */
export declare function validateCronSchedule(input: CronScheduleInput): CronScheduleValidationError[];
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