/**
 * formatEvent turns a progress event into a single human-readable markdown line.
 * Shared by the stdout sink (printed as-is) and the Telegram sink (which then
 * runs it through renderTelegramHtml). Pure (no I/O) so it is unit-tested
 * directly and both sinks render identical content.
 */
import type { ProgressEvent } from "../ports/progress.ts";
export declare function formatEvent(event: ProgressEvent): string;
/**
 * Formats a millisecond duration as a compact human string: "45s", "2m5s",
 * "1h3m". Seconds are dropped once past an hour (minute resolution is enough
 * for a long run). Used by the heartbeat line so the user sees how long the
 * current step has been running.
 */
export declare function formatDuration(ms: number): string;