Is There a Condition That Can Trigger After I Type Any Single Character?

Sorry, I forgot to change the KM Search Regex that extracts the script characters.

Just updated OP and Macro with a major update.

Please give this a try. Delete the original macro before importing the new version.

If you want to change the Typed String Trigger, you will also have to change other parts of the Macro, as well as the AppleScript, to match.