The AN2Linux Client is an Android application designed to forward device notifications to a Linux desktop companion server over secure TLS connections. It intercepts notifications via Android's NotificationListenerService, applies user-configured filters (per-app and global), and transmits notification data to configured servers (Wi-Fi, mobile, or Bluetooth) using certificate-based authentication. The architecture combines Android components (Activities, Services, BroadcastReceivers) with modern patterns like ViewModels/LiveData for UI state management, custom preferences for advanced settings, and isolated cryptographic helpers for TLS operations. Key features include foreground service execution to bypass background restrictions, boot-time auto-start, granular notification filtering, and support for multiple connection types with SSID whitelisting for Wi-Fi.