/**
 * Whether the requested document replaced the mounted content. Read this result,
 * not `onReady`: recovery can make the previous document ready after a failed attempt.
 * A failure does not guarantee that the previous document is still available.
 */
export type DocumentReplacementResult = {
    ok: true;
} | {
    ok: false;
    /** Runtime refusal or failure code, when provided. */
    reason?: string;
    /** Additional runtime context, when provided. */
    detail?: string;
};