/**
 * adapters/pailot/message-queue.ts — Persistent message queue for PAILot.
 *
 * Circular buffer of content messages (text, voice, image) saved to disk.
 * Each message gets a monotonic sequence number that survives daemon restarts.
 * The app tracks its lastSeq and requests catch_up on reconnect.
 *
 * Only content messages are queued — typing indicators, status updates,
 * session lists, and other ephemeral messages are not persisted.
 */
export interface QueuedMessage {
    seq: number;
    sessionId: string;
    type: string;
    payload: Record<string, unknown>;
    ts: number;
}
/** Load the queue from disk. Call once at daemon startup. */
export declare function loadQueue(maxMessages?: number, maxQueueBytes?: number): void;
/** Force an immediate save (call on daemon shutdown). */
export declare function flushQueue(): void;
/**
 * Enqueue a content message. Returns the assigned sequence number.
 * Only call this for content messages (text, voice, image).
 */
export declare function enqueue(sessionId: string, type: string, payload: Record<string, unknown>): number;
/**
 * Get all messages with seq > afterSeq.
 * Optionally filter by sessionId (returns all sessions if not specified).
 */
export declare function getAfter(afterSeq: number, sessionId?: string): QueuedMessage[];
/** Get the current latest sequence number (nextSeq - 1). */
export declare function getLatestSeq(): number;
/** Check if a message type should be queued. */
export declare function isContentType(type: string): boolean;
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