/**
 * daemon/mailbox-watch.ts — a queued message that never gets read is not queued.
 *
 * `send_to_session` now says "queued" when it could not confirm the target took
 * the message, which is honest at the moment of sending. It stops being honest
 * with time. A message queued at 14:00 and still undrained at 18:00 is not
 * pending — it is lost, and an audit trail that still calls it "queued" is a
 * silent failure wearing a truthful label. That is harder to spot than an
 * obvious lie, because nothing looks wrong.
 *
 * So every state that can persist has to know how long it has been in that
 * state. The mailbox already stamps each message; this is the thing that looks.
 */
import { type MailboxMessage } from "../core/state.js";
/** How long a message may sit undrained before it is a fault rather than a wait. */
export declare const STALE_AFTER_MS: number;
/**
 * Report messages that have outlived "queued".
 *
 * Exported for tests and callable directly; `now` is injected so ageing can be
 * exercised without waiting a quarter of an hour.
 */
export declare function sweepStaleMailboxes(now?: number): MailboxMessage[];
export declare function startMailboxWatch(): void;
export declare function stopMailboxWatch(): void;
//# sourceMappingURL=mailbox-watch.d.ts.map