This work eschews practicality. The API will be super annoying and no one will want to use it but me. For example, the IO god object is passed to main as a refe

This work eschews practicality. The API will be super annoying and no one will want to use it but me. For example, the IO god object is passed to main as a reference rather than by value. I don't think there's any risk of splitting the ecosystem and I don't expect the cap_std project to really be interested in my BS. That said, I did not know about cap_std until you mentioned it. I might steal the thing where all fs functionality is provided as methods on a `Dir`.