export type ViewerOptions = {
    runsDir: string;
    runId?: string | undefined;
    /** Redraw interval for elapsed timers while a run is active. */
    tickMs?: number;
};
/**
 * Interactive live viewer. Watches the runs directory and re-renders as run
 * bundles change on disk. Returns when the user quits.
 */
export declare function runViewer(options: ViewerOptions): Promise<void>;