/** Resolve a front-door resume: pick a target root (MRU or via picker), then
 *  take over this terminal to view it. On success it execs the viewer inline and
 *  never returns. Otherwise reports why it did not: `'empty'` (no resumable root
 *  here → caller boots a fresh one) or `'aborted'` (the picker was dismissed →
 *  caller exits without surprise-booting). */
export declare function resumeRoot(cwd: string, pick: boolean): Promise<'empty' | 'aborted'>;