/**
 * Magic Byte Detection
 *
 * Detects file types by reading magic bytes (file signatures).
 * More reliable than extension-based detection.
 * Uses file-type library for comprehensive format database.
 */
export interface FileTypeInfo {
    mime: string;
    ext: string;
    category: 'image' | 'video' | 'audio' | 'archive' | 'document' | 'unknown';
}
export declare class MagicByteDetector {
    /**
     * Detect file type from magic bytes
     * Falls back to extension if magic bytes not recognized
     */
    detectFileType(filePath: string): Promise<FileTypeInfo>;
    /**
     * Detect from file extension (fallback method)
     */
    private detectFromExtension;
    /**
     * Get MIME type from extension
     */
    private getMimeFromExtension;
    /**
     * Categorize MIME type into broad categories
     */
    private categorizeType;
    /**
     * Check if file is binary (not text)
     */
    isBinary(filePath: string): Promise<boolean>;
}
export declare const magicByteDetector: MagicByteDetector;
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