/**
 * Minimal SSE connector compatible with browser and Node fetch.
 * Parses Server-Sent Events (text/event-stream) into messages with data field.
 */
export interface SSEOptions {
    fetchImpl?: typeof fetch;
    signal?: AbortSignal;
}
export interface SSEMessage {
    event?: string;
    data?: string;
    id?: string;
}
export declare function connectSSE(url: string, opts?: SSEOptions): AsyncIterable<SSEMessage> & {
    close(): void;
};