Earlier quoted context omitted.
I don't think being able to reverse engineer your project is actually a good qualification for hiring you, considering your employees don't need to do that. Also, isn't she a high schooler/freshman? There's always internships but it's best to do other things before grinding those out.
If someone understands your codebase without your sources and docs - you can bet that they will also understand it with the help of those. Usually better, if the docs have any value. And this is kind of a valuable skill, considering how many coders don't understand their codebase even with docs.
It's not a negative of course.