export type ChatHealthAlertOutcome = {
    status: "healthy";
    turns: number;
    badRate: number;
} | {
    status: "insufficient-data";
    turns: number;
} | {
    status: "cooldown";
    retryAfterMs: number;
} | {
    status: "alerted";
    turns: number;
    badRate: number;
    staleA2ATasks: number;
    recipients: number;
} | {
    status: "delivery-failed";
    reason: string;
} | {
    status: "persistence-failed";
    reason: string;
} | {
    status: "check-failed";
    reason: string;
};
export declare function checkChatHealthAndAlert(now?: number): Promise<ChatHealthAlertOutcome>;