The newly submited version will now list global blackboard variables within the dropdown for selecting target override agent. Is that what you mean by some tasks don’t support global blackboard? 🙂
I’ve also gone ahead and changed the UI, so that now you will be able to select a variable through the dropdown even in a “headless” mode as you call instead of showing the textfield. Of course, the only valid option this way is to select a global blackboard variable (or manual/dynamic)
I will also try and improve the global blackboard workflow in the next version 🙂