M365 Copilot DSL Details

It is my understanding that a DSL was created for each Office application. Copilot generates this DSL, which is a simplified view of the app. Then it is transpiled into Graph api calls to actually make the changes to your doc or slide or email safely.  Is there more details on this process and is the DSL documented. I would like to understand better what kind of things can be automated using copilot.