I think this is the obvious long term path for software development, but hard to know if it actually works since there's no way to try it. I also wonder if it has rough spots then how well will it be adopted vs tools like copilot that don't require such major change to developer workflows.
It sounds like the focus is on migrations, refactors, hiding stuff behind feature flags, etc. That's useful but it's less than what it sounded like from codegen's marketing materials which makes sense, they are selling the vision and not the current product.
If it's limited in handling complexity right now then it sounds like a nice feature for Linear. That also sounds like a good way to enter developer's workflows if you have some button on linear tasks to just automate it. That's not L5 engineer though and I bet it's expensive on the order of thousands of dollars per month for the OpenAI use.
Congrats to the team on the round, excited to see how it develops.