Thanks for the mod. This looks really fun.

Instead of making a new item for immunosuppressants it would be interesting if high bio-instability lowered immunity gain speed. Then if cyber psychosis acted like a disease, with infection and immunity, you could treat it using vanilla medicine and vanilla tend quality mechanics. You catch the cyber-psychosis disease more often as your bio-instability increases kinda like how high toxic buildup causes cancer, vomiting, etc. So you need good doctors and good medicine to keep your army of bionic commandos functional, which seems fun and manageable, but you still catch the cyber-psychosis randomly so it can still catch you off-guard and make fun tense scenarios.

I guess the inworld explanation would be that as you graft more things onto your body your immune system gets exhausted trying to reject it. Once the immune system is weakened, the now unmitigated intrusion of foreign material from the implants into the body and brain results in cyber psychosis. That's the opposite of how I understand it to work in cyberpunk, where the problem is that the implants agitate and upregulate the immune system, making cyber-psychosis the result of a sort of autoimmune disorder(?).

Comparing the two, I think keeping immunity gain speed generally good, having it treat cyber-psychosis instead of exacerbate it, keeps it simple for the average rimworld player. Though the inverse would be cool, making cyber-psychosis more dangerous when immunity gain speed is high, with separate immuno-supressants items that actually lower immunity gain speed to combat it. In the jungle, it would be fun to choose between going machine mad or just dying from malaria haha.

I've not coded in Rimworld before so I don't how difficult it would be to make the mental breaks occur when the cyber psychosis disease ramps up vs your current implementation. I am also biased because I prefer mods that use vanilla items/mechanics as much as possible before adding new ones. If you wanted immunosuppressants to be its own item with its own scarcity/mechanics I understand that as well.

Thanks for reading. The concept is interesting. I've not even played it yet and I sat down and wrote a novel. lol