Imagine a hypothetical case where you have two skills one for food near me and one for the weather near me. The food skill will ask for my current zip code to use to help search near me. On subsequent requests it should know the zip code as I already gave that information. Then I invoke a new skills that gives me the weather near me. Can it use that zip code from the other skill or will it have to prompt the user again? I would like to do this without setting up my own external resources for storing this information. So is there a core level way to share variables across skills. I just saw this project for the first time today, so new and just curious.