Currently the AL Language Extension don't work in Visual Studio Codespaces (https://visualstudio.microsoft.com/de/services/visual-studio-codespaces/). You can install the extension, but almost all except of three commands are missing and the few that are there don't work, e.g. Command 'AL: Go!' resulted in an error (command 'al.go' not found) or Command 'AL: Open Events Recorder' resulted in an error (command 'al.openEventRecorder' not found).