I'd do two things before any code changes: 1. Ask the AI to document the code base; either in a single repo or in a sidebyside like <file>.md; then scale up wi

I'd do two things before any code changes: 1. Ask the AI to document the code base; either in a single repo or in a sidebyside like <file>.md; then scale up with larger documents for functionality/submodules etc. This will get you and your team to properly contemplate the monstrosity. 2. Once you have documentation, then you write tests; unit tests, e2e, etc. Make sure everything is passing the tests. After that, you'll hopefully both gained proper insight and solidified functionality. Then you can port whatever you like.