/**
 * Rewrite authorable 1-based media positions to canonical ready media ids and
 * refuse every other shape of media reference before anything is sent.
 */
export declare function rewriteMediaReferences(body: string, mediaIds: readonly string[], { allowPositions }?: {
    allowPositions?: boolean;
}): {
    ok: true;
    body: string;
} | {
    ok: false;
    error: string;
};