/**
 * PDF Content Handler
 *
 * Handles application/pdf content type. Extracts text and metadata from PDF files,
 * passes all text through the injection pattern registry, and returns sanitized plain text.
 *
 * What it handles:
 * - PDF body text (full document)
 * - PDF metadata: title, author, subject, keywords, creator, producer
 * - Annotation text
 * - Form field values
 *
 * What it strips:
 * - Embedded binary objects (fonts, images, attachments)
 * - Returns only extracted text, not original binary
 *
 * What it passes through:
 * - All extracted text after injection pattern sanitization
 */
import type { HandlerResult } from './types.js';
/**
 * Handle PDF content
 *
 * @param content - Raw PDF binary data as Buffer or string
 * @param mimeType - Original MIME type
 * @returns Sanitized handler result
 */
export declare function handlePdf(content: string | Buffer, mimeType: string): Promise<HandlerResult>;
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