Same as %CMDER_ROOT%, %MSYS2_ROOT% is pointing the root of MSYS2. This will help lot of works.
You mean adding MSYS2_ROOT to msys2.json?
"env_set": {
"MSYS2_ROOT": "$dir"
},
Yes.
Updated: request persistent directory for /home. Most of user individual config files are there.
Help. Today we are having msys2 update. Please consider confirm this issue.