That's a great point. Looking at it again, maybe it's just the wording of the prompt that I don't like. For example, we have a #dev channel and it says:

  Message dev

It doesn't quite register for me that the word "dev" is referring to the channel name - it's drowned out by the big word "Message".

And my first subconscious thought is that "Message" is being used as an adjective: are we talking about the "Message dev"? Who is that?

I think it would be helpful if the prompt used the standard notation for channel names:

  Message #dev

But if I had a prompt like this I'd probably spell it out in full to avoid any confusion:

  Send a message to #dev