I assume you are referring to the
IRCv3 message tags feature? I have added support for this to the next version. mIRC will automatically remove message tags (that start with the @ prefix) from all incoming server messages and place them in a $msgtags identifier per event for use by scripts.
That said, it would not be possible to make a /parse command work in specific events as, even with ^ events, a lot of pre-processing and internal state updates can take place based on the incoming line before the ^ event is called. The only place where this could work is in the alias that /debug calls, which takes place before a server message is parsed in any way.
However, while it would be possible to add support for a /parse command to the debug event to allow a script to modify incoming server messages, this would very likely result in unexpected side-effects as mIRC maintains a large number of internal states for many events. A script that changes/halts incoming lines that mIRC is expecting could cause subtle errors in features without realizing it.
