/** The shell as it is on disk right now, not as it was when the server started. */
export declare function pageHtml(): string;
/**
 * The shell, or an explanation of why there isn't one.
 *
 * A shell the build forgot to copy is a blank screen, and a blank screen is the
 * hardest kind of failure to diagnose. This says which file is missing instead,
 * the same answer a missing stylesheet already gets.
 */
export declare function servePage(): Response;