This is way easier than Visual Studio Code.
If you installed VSCodium using Homebrew, it will work right away. The only difference is the name of it.
It’s actually easy to remember. For both VSCode and VSCodium, the command line is the name without the “VS.” So instead of code in Visual Studio Code, it’s codium for VSCodium.
So in Terminal, you can type in the following:
% codium .
And VSCodium will open up and load all the contents in that folder where you type in that codium . command.
Further Reading
VSCodium, a Free Version of Visual Studio Code
How to Open Visual Studio Code from command line macOS
