/**
 * Local event outbox for offline/disconnected mode.
 * Buffers structured OrgX events when cloud API is unreachable.
 * Events are flushed on next successful sync.
 */
import type { LiveActivityItem } from "./types.js";
export interface OutboxEvent {
    id: string;
    type: "progress" | "decision" | "artifact" | "changeset" | "retro" | "outcome" | "quality";
    timestamp: string;
    payload: Record<string, unknown>;
    activityItem: LiveActivityItem;
    replayFailures?: number;
    lastReplayError?: string | null;
    lastReplayAt?: string | null;
}
export interface OutboxSummary {
    pendingTotal: number;
    pendingByQueue: Record<string, number>;
    oldestEventAt: string | null;
    newestEventAt: string | null;
}
export declare function appendOutboxDeadLetter(sessionId: string, event: OutboxEvent, reason: string, error?: string | null): Promise<void>;
export declare function readOutbox(sessionId: string): Promise<OutboxEvent[]>;
export declare function appendToOutbox(sessionId: string, event: OutboxEvent): Promise<void>;
export declare function replaceOutbox(sessionId: string, events: OutboxEvent[]): Promise<void>;
export declare function readAllOutboxItems(): Promise<LiveActivityItem[]>;
export declare function readOutboxSummary(): Promise<OutboxSummary>;
export declare function clearOutbox(sessionId: string): Promise<void>;