Clone and open this repo in VS Code Run yarn to install the dependencies. Press F5 to open a new window with your extension loaded Open Code > Preferences > Color Theme [⌘k ⌘t] and pick the "GitHub ..." theme you want to test. Note: It seems this has to be done 2x because the first time it switches back to the default light theme. This might be a bug? Make changes to the /src/theme.js file. UI: Fo