/**
 * Page Schema Extraction
 *
 * Functions for extracting and formatting structured data from pages.
 */
import type { MetaImage, MissingTag, PageSchema, SweetlinkResponse } from '../../types.js';
/** Check whether a meta-tag key holds an image URL (not dimensions/alt/type metadata) */
export declare function isImageKey(key: string): boolean;
/**
 * Extract structured data (JSON-LD, meta tags, Open Graph, etc.) from the page
 */
export declare function extractPageSchema(): PageSchema;
/**
 * Convert a page schema to markdown format
 */
export declare function schemaToMarkdown(schema: PageSchema, extras?: {
    missingTags?: MissingTag[];
    favicons?: MetaImage[];
}): string;
/**
 * Extract favicon and touch-icon links from the page
 */
export declare function extractFavicons(): MetaImage[];
/**
 * Check for missing recommended meta tags
 */
export declare function checkMissingTags(schema: PageSchema): MissingTag[];
/**
 * Handle get-schema command from CLI
 */
export declare function handleGetSchema(): SweetlinkResponse;
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