ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(Reflex.getInstance(),
				ListenerPriority.NORMAL,
				PacketType.Play.Client.CLIENT_COMMAND) {
			@Override
			public void onPacketReceiving(PacketEvent event) {
				if (event.getPacketType() == PacketType.Play.Client.CLIENT_COMMAND) {
					final PacketContainer packet = event.getPacket();
					final ClientCommand action = packet.getClientCommands().read(0);
					if (action == ClientCommand.OPEN_INVENTORY_ACHIEVEMENT) {
						//Code goes here
					}
				}
			}
		});