Currently there is the possibility to either process and fill out a field automatically, but also process and give multiple suggestions back and pick from them.
The later can be viewed in the AI Content Suggestions module where it returns a suggestion pick.
This will probably be a common pattern for processors to want to implement, and instead of every plugin implementing this by copy and pasting code, we should have a common method for it, that implements the JS libraries needed and returns an AjaxResponse that can be used as the response of the form.
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This is great. I wonder if it could even be more optimized such that the returnSuggestions method only returns a key/value array and the whole ajax implementation is done by the base class. That way, the implementing developers have even less work to do, and we only maintain the ajax part once.