/**
 * `sdocs check` — compile every documentation stage and validate the site
 * structure, reporting what breaks without starting a server or writing a
 * build. Exits non-zero on any error so CI can gate on it.
 *
 * The structure half matters as much as the compile half, and used to be
 * missing: an unknown `@section`, two entities claiming one route, or a `home`
 * pointing nowhere all fail `sdocs build`, so a `check` that ignored them
 * passed sites that could not be built — in the one command CI is told to run.
 */
export declare function checkCommand(): Promise<void>;