import type { LTWorkflowConfig, LTAgent, AgentSchedule } from '../../types';
import type { LTYamlWorkflowRecord } from '../../types/yaml-workflow';
/**
 * Validate a cron expression and enforce a minimum interval.
 * Throws if the expression is invalid or fires more often than once per minute.
 */
export declare function validateCronSchedule(expr: string): void;
/**
 * Singleton registry for workflow cron schedules.
 *
 * Follows the same pattern as maintenanceRegistry:
 * - connect()   — load configs with cron_schedule, start Virtual.cron for each
 * - disconnect() — interrupt all crons
 * - restartCron() — stop + start a single cron after config change
 * - clear()     — reset for tests
 */
declare class LTCronRegistry {
    private activeCrons;
    private connected;
    private systemPrincipal;
    /**
     * Load all workflow configs with a cron_schedule and start Virtual.cron for each.
     * Call after workers and migrations are ready.
     */
    connect(): Promise<void>;
    /**
     * Start a single Virtual.cron for a workflow config.
     */
    startCron(config: LTWorkflowConfig): Promise<void>;
    /**
     * Stop a single cron for a workflow type.
     */
    stopCron(workflowType: string): Promise<void>;
    /**
     * Restart a cron after a config change.
     * Stops the old cron (if any) and starts a new one if cron_schedule is set.
     */
    restartCron(config: LTWorkflowConfig): Promise<void>;
    /**
     * Load all YAML workflows with a cron_schedule and start Virtual.cron for each.
     */
    connectYamlCrons(): Promise<void>;
    /**
     * Start a single Virtual.cron for a YAML workflow.
     */
    startYamlCron(wf: LTYamlWorkflowRecord): Promise<void>;
    /**
     * Stop a single YAML workflow cron.
     */
    stopYamlCron(yamlWfId: string): Promise<void>;
    /**
     * Restart a YAML workflow cron after config change.
     */
    restartYamlCron(wf: LTYamlWorkflowRecord): Promise<void>;
    /**
     * Start a single agent schedule cron.
     */
    startAgentCron(agent: LTAgent, schedule: AgentSchedule, idx: number): Promise<void>;
    /**
     * Stop all cron schedules for an agent.
     */
    stopAgentCrons(agentId: string): Promise<void>;
    /**
     * Restart all cron schedules for an agent (after config change or pause/resume).
     */
    restartAgentCrons(agent: LTAgent): Promise<void>;
    /**
     * Arm all cron schedules for active agents. Called at startup.
     */
    connectAgentCrons(): Promise<void>;
    /**
     * Disconnect on graceful shutdown. Clears the local registry so this
     * container stops consuming cron streams. Does NOT call Virtual.interrupt()
     * — cron jobs are durable rows shared across the fleet. Another container
     * (or this one on restart) will continue servicing them.
     *
     * Use stopCron/stopAgentCrons/stopYamlCron for intentional permanent kills
     * (e.g. user deletes an agent or changes a schedule via the dashboard).
     */
    disconnect(): Promise<void>;
    /**
     * Reset state. Used in tests.
     */
    clear(): void;
    get hasActiveCrons(): boolean;
    get activeWorkflowTypes(): string[];
}
/** Singleton cron registry */
export declare const cronRegistry: LTCronRegistry;
export {};