This is incredibly simple and neat! Love it!

Will have a think about how this can extended to other types of uses.

I have personally been trying to replace all tools/MCPs with a single “write code” tool which is a bit harder to get to work reliably in large projects.

You hit it! I am also thinking of programatic control of DevTools so I made this: https://github.com/devtoolcss/chrome-inspector

It is a core library and I am extending it to usable tools. Hopefully agents can directly script it.