[justincormack]

Yes I think 1. is true, it is a library OS and your application, but very much in the library OS model.

OSv is a bit unusual architecturally, it is almost a very small OS that runs applications in a single address space. It is perhaps a hybrid architecture.

[amirmc]

I've described it by saying unikernels are constructed by library operating systems. ie, the unikernel is the artefact but the libOS is what you (as a dev) actually work with.

The first line of the Wikipedia page is written this way - https://en.wikipedia.org/wiki/Unikernel