[plt-scheme] debugging [mini rant]

Morning,

I think it's highly likely that I'm influenced by my early learning to
write code days. I much prefer command line and tty systems to any graphic
systems or systems with an attached rodent. Even using my windows (yuck)
workstation my primary interface is an xterm into other systems. I use
Outlook because I must support users having the same. My personal email
program is character based (mutt). I only start a graphic email program
when I need to look at pictures that someone sent.

All that is a preface to the statements that I like command line,
I like vi, I like gdb and perl -d. I would be much happier with
plt-scheme/mzscheme if there is a way to do 'mzscheme -d code.lsp'. Using
trace, like TRON from decades ago for me, does work, but isn't as
satisfying as 'perl -d'.

Is there a command line debugger in mzscheme?

I finally found a way to get vi/vim to lisp indent my code. Now I want
a debugger that I'm happy with.

Mike