Postprocessor in NLU stack


I am trying to add a component in the NLU stack that should be run after classification is executed in NLU but before fulfillment is run in core. I am wondering which component I should be extending for that? I will be mainly adding metadata to match DB, but also maybe I can’t find that match so I would need to diverge to a fallback intent? Should I extend general Component class for that purpose?