/**
 * SEO indexability checker — determines if a page is crawlable and indexable.
 *
 * Checks:
 * 1. X-Robots-Tag response header (noindex, nofollow, noarchive)
 * 2. <meta name="robots"> tag (noindex, nofollow)
 * 3. Canonical URL (self-canonical vs cross-canonical)
 * 4. rel="nofollow" on outbound links
 * 5. hreflang tags (multilingual)
 * 6. Open Graph completeness (og:title, og:description, og:image)
 * 7. Structured data presence (JSON-LD)
 * 8. Meta description
 * 9. Title tag length (< 60 chars recommended)
 * 10. URL structure (query params, fragments, excessive depth)
 */
import type { Page } from 'playwright';
export interface SeoIssue {
    rule: string;
    severity: 'critical' | 'warning' | 'info';
    message: string;
    value?: string;
}
export interface SeoCheckResult {
    url: string;
    isIndexable: boolean;
    canonicalUrl?: string;
    isSelfCanonical?: boolean;
    hreflang: Record<string, string>;
    issues: SeoIssue[];
    score: number;
    checkedAt: string;
}
export declare function checkSeo(page: Page, url: string, responseHeaders?: Record<string, string>): Promise<SeoCheckResult>;