VSCodium is a community-driven, fully open-source binary distribution of Visual Studio Code (VS Code), built from the same open-source repository (Code-OSS) but without Microsoft's proprietary components.

The most used opencode plugins for VSCode have issues when installed in VSCodium except OpenChamber.

Install OpenChamber plugin:

in the left sidebar select Extentions(Ctrl+Shift+X) in the search bar type OpenChamber and in the list press Install✔