/**
 * Mutate a tweet (and any quoted tweet) in place so every raw CDN image URL
 * is rewritten to route through the site's `/embed/x-image` proxy. When a
 * `secret` is provided, URLs are HMAC-signed and pass `withSigning` without a
 * page token.
 *
 * Clone the input first if it came from a shared cache — this function does
 * not copy.
 */
export declare function rewriteTweetImages(tweet: any, imagePath: string, secret?: string): void;
/**
 * Mutate a Bluesky post in place so every CDN image URL routes through the
 * site's `/embed/bluesky-image` proxy. Covers author avatar, embedded images
 * (thumb + fullsize), and external embed thumbnails.
 *
 * Clone the input first if it came from a shared cache — this function does
 * not copy.
 */
export declare function rewriteBlueskyPostImages(post: any, imagePath: string, secret?: string): void;