I have just pushed an initial release of reflex-libtelnet to Hackage.
reflex-libtelnet wraps libtelnet in a Reflex interface, so that you
can describe data flows through a telnet state tracker using Reflex
Events. Even if you're not using Telnet in 2019, you might find it
interesting as a study in binding Reflex to a callback-oriented
A telnet echo server is provided as an example.
Bug reports and questions/patches are welcome on Sourcehut.