OS-specific targets?

I just learned about this project from a Fosdem talk - looks super interesting! Having the library be OS-agnostic for maximum portability makes logical sense. However, practical embedded applications tend to use an OS. Have you looked into adding targets, either in tree or as separate examples? I'd propose Zephyr RTOS as it is under a permissive license, includes many things like HW & network abstractions and is growing in popularity.