Alright I think everything is working. And #phetch works on openbsd (if you have it build somehow, somewhere with libressl previous current).
phetch in or out of tmux seems to work, dimensions are 40x80 characters, foreground and background uniquely configured. #emacs #elphermode works but black and white for me.
Readme instructions:
gopher://tilde.institute/0/~screwtape/bit-d-generate/README.txt
Web proxy instructions:
https://gopher.floodgap.com/gopher/gw.lite?=tilde.institute+70+302f7e7363726577746170652f6269742d642d67656e65726174652f524541444d452e747874