export interface ArticleResult {
    title: string;
    content: string;
    excerpt: string | null;
    byline: string | null;
    length: number;
}
/**
 * Extract a readable article from HTML using Mozilla's Readability library.
 *
 * Uses dynamic import so the optional @mozilla/readability and linkedom
 * packages are only loaded when this function is actually called. Returns
 * null if either package is not installed or if the page cannot be parsed
 * into an article.
 *
 * @param html - Raw HTML string of the page
 * @param url - The page URL (used for resolving relative URLs internally)
 * @returns An ArticleResult with cleaned content, or null on failure
 */
export declare function extractArticle(html: string, url: string): Promise<ArticleResult | null>;
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