/**
 * HTML to text parser — converts HTML to readable plain text without external dependencies.
 * Used internally by the web_fetch tool to extract readable content from web pages.
 */
/**
 * Convert HTML to readable plain text.
 * - Strips HTML tags
 * - Converts HTML entities (& < > "   &#NNN; &#xHHH;)
 * - Preserves paragraph breaks
 * - Removes script, style, nav, footer, header blocks entirely
 * - Extracts title separately
 * - Collapses multiple blank lines
 * - Trims whitespace
 *
 * @param html - Raw HTML string
 * @returns Plain text with preserved structure
 */
export declare function htmlToText(html: string): string;