What’s the status of the project?

The first EasyDevKists are available in the shop.

Is the USB protocol for the WCH CH347T chip documented somewhere?

Yes, I’ve written a litte documentation by myself after I’ve researched so many things in different source codes on GitHub. So that documentation is the result of researching in public available code.

Here is my documentation: https://www.easydevkits.com/wch-ch347-jtag-interface/