[plt-scheme] debugging [mini rant]

2009/7/29 Gregory Cooper <ghcooper at gmail.com>:
>> Indeed, a command line debugger would make easy to connect the
>> debugger from other environments (SLIME?), but it's understand that it
>> could be a lot of work if such debugger is currently embedded into the
>> graphical environment.
>
> Support for setting breakpoints and inspecting the stack is
> implemented by source annotation and continuation marks.  All of this
> is independent of any graphical interface, and an interested
> programmer with some free time could build a text-based interface atop
> the same underlying mechanism.

Could you provide some link, please? I have not found any reference in PLT docs.

Thanks.