Good question
.. as MikroC (MikroPascal, MikroBasic) can be debugged only with MikroICD .... The schematic is available (you can take it out of easypic schematic if nothing else) but the firmware is not public nor open source. I tried to read the mikroICD fw from pickit4 and but it was code protected so I gave up (did not try to hack it). I do not believe the firmware will ever be public as mikroelektronika close pretty much everything (all libraries you get with mikroC are closed source
for example).... I know they were working on cli compiler and that they were in some negotiations with microchip (at least they said so) to make mikroC debuggable via mplab envinronment but they posted info that "they did not manage to find common language with microchip and they will continue with existing mikroICD" ... that's the info from mikroe forum .. maybe there are some news now, I have not visited it for some time now...
I still use MikroC from time to time and I'm pretty pissed off every time I need to debug anything ...