Pass

**Very well done Elias!**

Your division between library and binary in the same package is quite neet. Your code looks good and I love that you unit test!

Nice that you managed to get this far in the tutorial. I suggest that you continue further to gain something cool to show off. I doesn't matter that you follow another ones guidance, as long as you understand the code, it's impressive.


Keep it up!

The issue body contains praise and tutorial feedback but names no files, tests, entry points, or requested change. There is no actionable definition of done to investigate; a maintainer would need to clarify the intended work before anyone can start.

Written by the indexing model from the issue text.