Command ID Tagging
Commands may optionally be preceded by a command ID. This is any sequence of characters enclosed in square brackets. When used, at least one explicit reply is always sent for each command.
The reply is then also tagged with the same ID:
[23]ping[23]Ready "2.0" "WATCHPOINT" "Windows" true
Use this feature if you want positive confirmation of commands, or to explicitly associate a feedback message with a command.