Please contribute to elixr-lang/elixir GitHub project.
Now seriously … I would say that he should look at how Elixir is developed and see how things are working … Secondly I would say something like:
Ask yourself what developers would be interested in your language and why. Then think about solutions which would interest them.
Just for example Elixir is not first language which provides a stable API for writing concurrent code, but I absolutely love how concurrency topic was solved.
For people who are working on framework I would do literally everything to prevent them from working on them, hahah
Pretty similar case … take a look how Phoenix framework (which is basically library) have solved lots of things.
At end I would please to not create a cases which could produce huge stacktrace.
