Dev vs prod app development

We have a dev app and prod app that both need to integrate with our Alexa skill. We want to develop our Alexa skill using our dev environment/app, and then publish to production after we have completed testing.

From looking at Alexa certification documentation, it appears the dev version of the Alexa skill is always pushed to registered developers and the prod version (certified version) is pushed to all other users of our Alexa skill.

I need to figure out how to decipher between an Alexa skill setup using our dev app vs one setup using our prod app. It would be great if I could set a user context variable or something else that I could use to change which APIs are called from our Alexa skill in voiceflow.

Has anyone done that before? Is there another way people decipher between their dev and prod apps for Alexa skills?