At least when running under Franz emacs interface, the
PS command (which should dump a description of a
selected schema to the terminal) doesn't function.
Possibly an issue with binding the terminal identifier
This is not a bug. At least, the code works as intended. The problem is that the interaction is non-intuitive.
Yes, I wasted a couple hours trying to "fix" this problem before reading the code more carefully. And of course the instructions actually say that you need to use middledown.