A lot of philosophy is constructed in ways that make interfaces for applications almost impossible or at least unlikely. The same goes for many models of epistemology and phil of science.
I am currently mulling over the idea whether or not the concept of “object-oriented ontology” could be useful for the Underlay.
If somebody wants to jump into this, too, here is a talk/debate where the inventor of the theory presents it in terms that are probably also accessible for non-philosophers: https://youtu.be/XhI-wnwo5Ew