> I don’t use RAG, and have no doubt the infrastructure for integrating AI into a large codebase has improved

It really hasn't.

The problem is that a GenAI system needs to not only understand the large codebase but also the latest stable version of every transitive dependency it depends on. Which is typically in the order of hundreds or thousands.

Having it build a component with 10 year old, deprecated, CVE-riddled libraries is of limited use especially when libraries tend to be upgraded in interconnected waves. And so that component will likely not even work anyway.

I was assured that MCP was going to solve all of this but nope.