Use A.I to teach humans about codebases A.I is generating :)

I have been seriously thinking about a tool that could read my recently generated codebase and teach me what is implemented depending on my understanding of the project, my skill level as dev and more other heuristics that could help me actually learn the project.

This could be an essential tool for onboarding people into projects they are not familiar with, but I wanna push this for codebases I may have generated in JAVA a language I have some experience with but not enough to build a SaaS with, but in the case I did, I would love to have a tool handhold me through learning everything and being up to par with the code.

There does not seem to exist a tool as such, would love to hear your thoughts and get feedback.