interface FrontmatterAlternate {
    hreflang: string;
    href: string;
}
interface FrontmatterFields {
    title?: string;
    description?: string;
    canonical_url?: string;
    last_updated?: string;
    locale?: string;
    alternates?: FrontmatterAlternate[];
}
export declare function buildFrontmatter(fields: FrontmatterFields): string;
export {};