The intention of this library is to provide an idiomatic C++ interface to using Magenta handles and syscalls. This library provides type safety and move semantics on top of the C calls.
This library does not do more than that. In particular, thread and process creation involve a lot more than simply creating the underlying kernel structures. For thread creation you likely want to use the libc (or libc++ etc.) calls, and for process creation the launchpad APIs.
This library is usable both within the Magenta repo as well as the general Fuchsia gn build.