It's likely smart enough. It just needs to be told to do it and provided the ability to introspect it. How close could foundational models get to building this harness if explicitly prompted to?

We've only just started training models to use tools. Next, we'll train them to build them. Harness engineering is an ephemeral art.

Letting the provider decide for the harness is a terrible idea in my eyes. Outsourcing harnessing is giving up control over the AI and equivalent to abandoning your sovereignty. It is a regression to a pre-enlightenment era.