I think you are not missing anything. I have not checked the code itself originally, I am sorry for that. But you are right that there seem to be no actual code for the harness itself. Just the code for (some) mods, plugins and scripts.

I just read the first line in the README file which says:

> Claude Code is an agentic coding tool ...

and I immediately assumed that this is what this repository hosts.

It claims that it includes plugins but that does not mean it does not include anything else. It also never explicitly claims, as far as I can tell, that it does not hold the source code of Claude Code, the harness, itself.

It is all extremely misleading, in my opinion. Which might be on purpose, unfortunately.