A little late to the whole urination thing, but I have made a cos file for that stuff, as well as bleeding (for twb creatures) and visible indicators for hotness and coldness. (Currently unreleased here, have posted in the discords like once or twice?)
Haven't released it, but the urination I just condensed into pooping (like birds I guess?) since it's controlled by the concentration of pistle and urea in a creature's system.
Oh wow. Nice! Super keen. C1, C2, and/or C3? I'm just becoming re-accustomed to these games for the first time in many years. How do I access this Discord server you're referring to? Thanks!