Apply this patch to your Xcode Server if you’re trying to edit a Bot’s test devices/simulators and see either ‘No Devices Found’ or if you see the list populated very, very slowly:

https://github.com/juce/xcs-tweaks

This is a wonderful tool to gain broad insight into your Xcode Server without messing around with its UI one-bot-at-a-time.

https://github.com/buildasaurs/xcskarel

A handy reference when writing pre- and post-trigger scripts for Xcode Server bots:

https://developer.apple.com/library/content/documentation/IDEs/Conceptual/xcode_guide-continuous_integration/EnvironmentVariableReference.html

An old article for the previous iteration of Xcode Server, but it’s a good starting point:

https://honzadvorsky.com/articles/2015-05-04-under-the-hood-of-xcode-server/