I found information on the official docs that onUri can be used as an activation event. So, my extension can be activated from, say, a WPF program written in C# by calling the URI such as vscode://myextension/arg1=foo&arg2=bar. But nowhere does it say how I can get the arguments that were passed with the URI request. Or even just get a raw string of it.
My question is, can it be done and if not, is there any other way …