Where are app shortcut and intents being executed when called from Apple Watch

Dear community, 3 Questions

1 On which processor are shortcuts being executed (the script flow) when started from Apple Watch?

2 Same question for the single intents execution.

3 Is there a good documentation and hopefully some architectural block diagram?

What is the issue or problem you are trying to solve?

I am trying to understand how to put shortcut scripts together in a meaningful way. For example, I want to know, if I switch on the battery save mode, which device is going to respond depending on where I let it run. but there are many more situations where I am asking myself the same. Also: all of the interests designed for Apple Watch: in which context are they executed? I just want to see this concept documented somewhere. I know: I could try it out. But why should I do this if there is any documentation somewhere. I am that kind of person who looks in documentation before I do something. However, I don’t find the documentation. Any good hint?

Where are app shortcut and intents being executed when called from Apple Watch
 
 
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