/**
 * Format Converter - Content-Type based format detection and conversion
 *
 * Handles format-appropriate conversion based on detected Content-Type.
 * Supports HTML, JSON, XML, and RSS/Atom feeds.
 */
/**
 * Detected format type
 */
export type FormatType = 'html' | 'json' | 'xml' | 'rss';
/**
 * Detect format from Content-Type header
 *
 * @param contentType - Content-Type header value (e.g., "application/json", "text/html; charset=utf-8")
 * @returns Detected format type
 */
export declare function detectFormat(contentType: string): FormatType;
/**
 * Convert JSON content to formatted string
 *
 * @param raw - Raw JSON string
 * @returns Formatted JSON string with prefix, or raw string if parse fails
 */
export declare function convertJson(raw: string): string;
/**
 * Convert XML content to clean text representation
 *
 * @param raw - Raw XML string
 * @returns Formatted XML representation with prefix, or tag-stripped fallback if parse fails
 */
export declare function convertXml(raw: string): string;
/**
 * Convert RSS/Atom feed content to clean Markdown
 *
 * @param raw - Raw RSS/Atom XML string
 * @returns Formatted Markdown representation, or falls back to convertXml if parse fails
 */
export declare function convertRss(raw: string): string;
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