These are just my notes, and described process worked for me on my 1C robot
If anything goes wrong, having USB adapter for FEL flashing might be the only way to restore your robot
this is not an official guide
oh, and I'm not responsible for any damage blah blah
and huge thanks to Dennis and Hypfer, and everyone behind this root :)
to enter uboot shell on 1C you have to: 0. turn robot off normally
Side note: The latest edge build of KeeAgent plugin offers an option for creating a WSL compatible socket. This would be very handy. I already tried to use that socket, but the socket file is currently empty and ssh inside WSL 2 is unable to use it. This appears to be a very new, unreleased and unstable feature. I will follow the development of it and when it finally works (well, for me) I will update this HOWTO. But until then, please use the proven wsl-ssh-agent/npiperelay.exe approach below.
Thanks to the instructions for WSL 2 of the wsl-ssh-agent project, KeeAgent works great in WSL 2 now:
https://github.com/rupor-github/wsl-ssh-agent#wsl-2-compatibility
The approach uses minimal and well maintained tools.
7z and wslvar being available (thanks @johnzielke