export type TaskState = 'queued' | 'leased' | 'running' | 'waiting_human_input' | 'succeeded' | 'failed' | 'retrying' | 'dead-letter';
export interface TaskRecord {
    id: string;
    command: string;
    state: TaskState;
    attempts: number;
    maxAttempts: number;
    leaseExpiry?: number;
    lastError?: string;
    createdAt: number;
    updatedAt: number;
    backoffStrategy?: 'fixed' | 'exponential';
    backoffBaseMs?: number;
    meta?: Record<string, unknown>;
}
export interface RetryPolicy {
    maxAttempts: number;
    backoffStrategy: 'fixed' | 'exponential';
    backoffBaseMs: number;
    maxBackoffMs?: number;
}
export declare const DEFAULT_RETRY_POLICY: RetryPolicy;
export declare const DEFAULT_MAX_BACKOFF_MS: number;
export declare const DEFAULT_LEASE_TTL_MS: number;
export declare function computeBackoffMs(attempts: number, policy: RetryPolicy): number;