/**
 * FanOutProgress forwards each progress event to several sinks (stdout,
 * progress.md, Telegram). Progress is BEST-EFFORT visibility, never the work
 * itself: a failing sink (e.g. Telegram down) must not crash the pipeline, so
 * each sink's error is swallowed and the rest still receive the event.
 */
import type { ProgressEvent, ProgressPort } from "../ports/progress.ts";
export declare class FanOutProgress implements ProgressPort {
    private readonly sinks;
    constructor(sinks: ProgressPort[]);
    emit(event: ProgressEvent): Promise<void>;
}