Today, I took a 8 year old code base I had up on GitHub that I documented super badly. And used what I learned to write comprehensive documentation for it.
The original code base is here: github.com/ssdug/Gringo...
github.com
GitHub - ssdug/Gringotts: A fully realized Accounting System for the Ministry of Magic
A fully realized Accounting System for the Ministry of Magic - ssdug/Gringotts