If anyone here still uses Zmud, I have a basic question.

Why doesn't this work:

#TRIGGER {^You are a Moonchilde.$} {#sub%ansi(cyan){Moonchilde}}

Thanks!

Looks like it's using a regular expression for the capture. If so, and I'm not sure if Zmud requires this, you may need to escape the period. ^You are a Moonchilde\\.$ or something similar ought to work.

Does: #SUB {You are a Moonchilde.} {%ansi(cyan)Moonchilde} not work?

Long, long time since I used zMUD, though.

As you pasted it here there's no space between #sub and %ansi. That's the only thing I see that's definitely wrong, though I'm dubious about the {}s as well. My guess is that this is what you actually wanted:
#TRIGGER {^You are a Moonchilde.$} {#sub {%ansi(cyan)Moonchilde}}

Draylor/Lendren are correct about what the problem is, and their solutions are both theoretically correct (I forget what constitutes a proper argument for %ansi). Lilija is not, as #TRIGGER does not use regular expressions.

#TRIGGER can use regex, but you have to put it in the options parameter then. Alternatively, you use #REGEX to make the trigger.

That worked. Thank you!