...ASM libraries are missing. Execution of C programs (and use of C libraries) is missing.
There is nothing to be implemented for this. The system for library loading is completely independent of a shell, and can be run from either the homescreen or within a shell without any need for hooks. As long as nostub assembly execution works, libraries will work as well. More information to come soon.
By the way, good luck! Looks like it is coming right along