export interface Message {
    data: string | Promise<string>;
    event?: "tool-init" | "tool-update" | "tool-completion" | "tool-error";
    id?: string;
    retry?: number;
}
export type SseMessage<T = unknown> = {
    type: "progress" | "error" | "complete";
    data: T;
    timestamp: number;
} | string;
export type SendData = ({ data, event, id, retry, }: Message) => void | Promise<void>;