/**
 * Register a sync exit handler that persists unsent events to disk.
 * Called once at startup. Uses PID in filename to prevent concurrent
 * CLI invocations from colliding.
 */
export declare function installStoreForward(): void;
/**
 * On startup, check for ANY pending files from previous invocations
 * (could be from different PIDs) and send them. Non-blocking, fire-and-forget.
 */
export declare function recoverPendingEvents(): Promise<void>;