> struggle to scale beyond much more than a single module

Yes. You must guide coding agents at the level of modules and above. In fact, you have to know good coding patterns and make these patterns explicit.

Claude 4 won’t use uv, pytest, pydantic, mypy, classes, small methods, and small files unless you tell it to.

Once you tell it to, it will do a fantastic job generating well-structured, type-checked Python.

Those are different kind of issues. Improving the quality of actions is what we're seeing here. Then for the larger projects/contexts the leaders will have to battle it out between the improved agents, or actually moving to something like RWKV and processing the whole project in one go.

They may be different kinds of issues but they are the issues that actually matter.