Sounds good to me, I don't see why not.

What would happen when the command is invoked in a non-whitelisted channel? I suppose it'd have to still send a new message that pings in bot-commands?

Also would the reply be ephemeral? We presumably don't want that, since a lot of the time the eval command is used to showcase something, meaning other people need to see the outcome.

And I believe @bj0key, the user who raised this, said they'd like to implement this fwiw @Robin5605

Yeah this seems good. Sometimes the eval takes a while and returns a few messages after the original !eval, so it's unclear which eval resulted in the output, the reply would provide a clickable link.

Yeah, I wouldn't mind implementing this. I think it'd also be worth having !timeit also reply on response, for the sake of parity between the two evaluation-based commands.

I can take on this!

Sorry for not noticing your message earlier @bj0key, I assigned it to someone else, hope you don't mind.