On Mar 13, 2017, at 11:54 AM, Barry Warsaw <barry@python.org> wrote:

I actually kind of like the idea of a mentionbot, but the current
implementation has some problems. Rather than calculating who should be
mentioned based on TIL (touched it last), it would be nicer if this got closer
to solving Raymond's comment. If the domain expert could be notified when PRs
touch stuff they care about, that might be better. The mentionbot could then
be opt-in for folks who want to see more detail.

So mention-bot supports that, it just needs configured. I suspect though that it’s touched-it-last mentioning will get better once we get more people with commits under their actual name.