/**
 * Message processing loop.
 *
 * Polls SQLite for pending messages, dispatches to pi agent, sends response
 * back to Discord. Enforces per-channel serial processing and global
 * concurrency limit.
 */
export declare function isChannelProcessing(jid: string): boolean;
export declare function abortChannelTask(jid: string): {
    aborted: boolean;
    cleared: number;
};
export declare function startProcessingLoop(): void;
export declare function stopProcessingLoop(opts?: {
    timeoutMs?: number;
}): Promise<void>;