export type OutboxKind = 'chat_message' | 'silent_exit_comment' | 'dispatch_ack' | 'command_ack' | 'cli_login_progress';
export type OutboxSendOutcome = 'ok' | 'retryable' | 'permanent';
export type OutboxSender = (payload: any) => Promise<OutboxSendOutcome>;
export interface OutboxEntry {
    id: string;
    kind: OutboxKind;
    enqueued_at_ms: number;
    attempts: number;
    payload: any;
}
export declare const OUTBOX_MAX_AGE_MS: Record<OutboxKind, number>;
export declare const OUTBOX_MAX_ENTRIES = 500;
export declare const OUTBOX_MAX_ATTEMPTS = 50;
export interface MessageOutboxOptions {
    persistPath?: string | null;
    now?: () => number;
    log?: (msg: string) => void;
}
export declare class MessageOutbox {
    #private;
    constructor(opts?: MessageOutboxOptions);
    setSenders(senders: Partial<Record<OutboxKind, OutboxSender>>): void;
    get size(): number;
    snapshot(): OutboxEntry[];
    load(): void;
    enqueue(kind: OutboxKind, payload: unknown): void;
    flush(reason: string): Promise<void>;
}