I've never seen this work. With Claude at least (even Opus), you'll get "Sure – no em-dashes in the text." or "P.S. – one last thing..."
and then if asked to review, it will show in its thinking trace "the command said no em dashes. But this is in a P.S., so that's normal use – keep."
I've never seen this work. With Claude at least (even Opus), you'll get "Sure – no em-dashes in the text." or "P.S. – one last thing..."
and then if asked to review, it will show in its thinking trace "the command said no em dashes. But this is in a P.S., so that's normal use – keep."