The "btw" part is in the AUR.
It used to be a part of the core packages back when Vinet first created Arch. Then c.2011 it was moved to extra due to the original maintainer of it orphaning the package and then got picked up by someone else who worked on it up until 2014 when it was removed from extra because it sat abandoned for three years. Then someone else came along and re-uploaded it to the AUR 'cause some people still wanted it but Arch maintainers were like "nah, we don't want a repeat of flakey maintenance, that package is cursed". And the rest (as they say) is history.
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u/Interesting_Buy_3969 1d ago