coyIM has the advantage of being designed around Tor support, forcing encryption by default, including INSTANT XMPP account generation and for using a secure backend written in Go.
The disadvantage is it uses OTR which lack offline message support.
Last blocker to inclusion from Stretch repos was that we needed to confirm stream isolation support which it likely does.
Done. Connects successfully even when Transparent TCP/DNS disabled on gateway. So it uses stream isolation out of the box and is ready for prime time.
Old pull request:
https://github.com/Whonix/anon-meta-packages/pull/8
Please re-base off master so it doesn't erase recent changes by you(?)
Done: https://github.com/Whonix/anon-meta-packages/pull/10
Offtopic: There is a PR from Algernon for intramfs packages, what s their status?
I've improved the package descriptions btw just now to include if it is a GUI or CLI package.
Problem has since been reported and fixed upstream. Let's look into re-including by Bullseye.