/**
 * Does this markup look like a web page rather than a standalone card?
 *
 * `render_html` draws one isolated document: it strips scripts, never touches
 * the network, and knows nothing about a project's stylesheets, routes or dev
 * server. A model asked to check a website will still reach for it, because the
 * tool *looks* like a page renderer and returns a picture that seems to prove
 * the site works. This check names that mistake in the tool result so the model
 * can correct itself instead of reporting a screenshot that is not the site.
 *
 * Deliberately advisory: a card that embeds a local logo still renders, and the
 * warning says what was missing rather than refusing the call.
 *
 * @module dsh-arya-image-gen/render/web-page-guard
 */
/**
 * Explain why this markup looks like a web page, or return undefined when it
 * reads as a standalone card.
 *
 * @param markup - the HTML handed to `render_html`.
 * @returns one short reason, or undefined.
 */
export declare function looksLikeWebPage(markup: string): string | undefined;
/** The sentence appended to the tool result when the guard fires. */
export declare function pageWarning(reason: string): string;