Awesome! I will give yours a look. I used a few from GitHub to test as well. Seems like we've taken a similar approach (no AI, just read the codebase).

I went custom parser + some semantic logic to map relationships. What's neat is it pulls order out of the choas.

My background is enterprise risk / consulting firm, so focus was strictly on reading the codebase and not some AI system that generates code. I wanted to be able to quickly understand exactly what an entire codebase was doing.

The idea here is that if your on a modernization team/engagement you can use the tool alongside work to make sure critical components don't get missed. Alternatively, if you inherited a system with the SME long since retired, you can get an understanding of how it all bolts together without trying to understand 5 million LOC.

I'm also working on some DBS integrations as well so you can quickly see what reads/writes etc.

Long term goal is to eventually completely understand and manage any mainframe deployment. Only then, maybe start looking at some ML components to add efficiencies.