Greg, I feel your pain. That said, there ARE solutions to the problems you describe. You say, "I’ll give you an example. I’m trying to get the Dez codebase to properly use SBP with MVC. The model doesn’t get it, even with examples of code I’ve written." Greg, this is typical for vanilla commercial AI. I ran into the same problem trying to use mine for advanced scientific research.

Greg, here's a white paper I wrote about how to roll your own AI that avoids the failure modes you mention.

https://energyscholar.github.io/persistent-ai-collaboration

This system now allows me to train my custom AI on specialty domain knowledge. it will retain and apply that knowledge weeks and months later with zero degradation. It could do the same for your team's need for it to understand specialty codebases and associated design patterns.

Bruce