/**
 * Facebook Messenger JSON Export Parser
 *
 * Parses individual chat JSON files from a Messenger `messages.zip` download.
 * Users extract `messages.zip` locally and upload one chat JSON at a time.
 *
 * Each file looks like:
 *   {
 *     "participants": ["Alice", "Bob"],
 *     "threadName": "Bob_15",
 *     "messages": [
 *       {
 *         "isUnsent": false,
 *         "media": [{ "uri": "..." }],
 *         "reactions": [{ "actor": "Alice", "reaction": "😆" }],
 *         "senderName": "Bob",
 *         "text": "Hello",
 *         "timestamp": 1711913758573,
 *         "type": "text" | "link" | "media" | "placeholder"
 *       }
 *     ]
 *   }
 */
import type { ParsedMessage } from '../types';
/**
 * Detect whether content looks like a Facebook Messenger chat JSON file.
 */
export declare function isMessengerExport(raw: string): boolean;
/**
 * Parse a Facebook Messenger chat JSON file.
 */
export declare function parseMessengerExport(raw: string): ParsedMessage[];
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