Tassilo Horn <tsdh@gnu.org> writes:

>> The proposed feature (if enabled) collects such mentions in a
>> separate buffer *rcirc mentions* as clickable text, so that you can
>> navigate to the source of the mention as often as you like.
>
> Attached is a revised version of the patch which uses markers instead
> of point values now and formats the mentions nicely, see this
> screenshot:

And here's a third version which adds a separate major mode for the
mentions buffer including movement commands to TAB (and C-TAB) to the
next (previous) mention link.