How to properly document a project.

[c0h1b4]

I have a legacy project that is quite extensive (hundreds of files). And I want to create a detailed technical documentation of all the project. From details like functions and variables used. Every time I ask the architect to document it, it creates a technical high level documentation just explaining the language used, some frameworks used, how to build and deploy, etc.
I needed a more detailed documentation on all the functions, files and how they interact and work, showing class/sequence diagrams, use cases, etc. And generate a folder with all the .md files.
Is there a way to do it with roo code?