The client doesn't compile.
There are instructions on how to check out the base repo, but no instructions on how to build the firmware. Even if you know what to to, the scripts are broken and the toolchain doesn't even get downloaded.
The signet-cli compiles, but it can't access any passwords, only backup/restore/wipe devices and so forth.
There have not been any updates in years to any of the signet repos. There are open pull requests that are one line fixes that fix compilation.