Hi, I'm trying to integrate the Promotion Engine into our custom storefront extensions. The intent is to leverage the rules system, but I need to work on some POC with the promo engine. I can't seem to find any documentation that describes the setup like some other extensions in versions below 6. Primarily I was looking for documentation that might describe the changes needed for powertools or another sample storefront. I can create the promos successfully in the backoffice, but I don't know where to start to leverage the rules/promo service in cart calculation.
I've been through the promo/rules engine documentation here and haven't found what I was looking for in the promo trail.