export declare const streamRouter: import("express-serve-static-core").Router;
export declare const sessionLastEvent: Map<string, {
    type: string;
    ts: number;
}>;
export declare function broadcast(msg: object): void;
export declare function getSseClientsSize(): number;
export declare function setOnCostUpdateRef(cb: (sessionId: string, cost: any, source?: string) => void): void;