I came across a fascinating bug the other day. Some code that involved parsing dates from incoming text had passed testing, but when running on a live server it failed. But not consistently - some dates continued to parse fine, but others would cause errors. The answer was... not what I expected. So maybe some of you might want to be aware of this too:
If you're creating custom Entities in Content Hub then you're likely going to be setting up some fields which relate to image assets. There is a default picker for these relation fields, but it's not a great editorial experience most of the time. So having worked through how to set up something better, I'm writing it down as a crib-sheet for myself next time. And maybe it will help you too...