When rejecting a candidate with a reject message, and clicking Customize message you have the option to let Co-pilot draft a message for you. It’s provided with this information:
Previous messages to that candidate
It will write in the same language and the same tone of voice
It will not mention the actual scores but could say something like your communication skills were good but your sales experience is a bit low for us
It could say your interview with James and Anne was great …
Which stage they’re being rejected on
You will then be able to edit the message draft just any other message before sending it. Clicking the Draft with Co-pilot button again will clear the message and create a new version.