VSCode Extension API - Identify file or folder click in explorer context menu

Question

VSCode 1.3 has added support for adding commands to context menus. Is there a way to identify whether a file or folder is clicked to open the explorer context menu?

Answer 1

Regarding obtaining a comprehensive list of context keys: in recent VSCode versions, there's a Developer: Inspect Context Keys command. After executing the command, it lets you pick a UI element:

After that, the dev console opens, and you can expand the logged object that contains a full list of context keys and their current values in this "scope":