Whilst reading a thread @rlkoshak mentioned about monitoring the openhab server log whenever you make changes to a rule…
I had the idea that perhaps it would be possible for VScode to automatically tail the log - greping the rule and possibly items contained in the rule file when it was saved…thus helping show anything that may be wrong with the rule…
A bit late for an answer, but i just saw this thread for the first time.
Actually the idea of logging presentation is written down one of the oldest issues in the extension github repo.
I use the logreader binding to send me errors from the log. If I save a rule and there is an error reported in the log, logreader picks it up and a pushover rule will send it to my phone immediately.