Piet said it right! There’s no way to reuse existing pack code unfortunately.
Different APIs call for different code from the ground up even if the end functionality is similar.
Here’s a doc/post from an event my team held Called “build a pack”. I think it’s a great place to start if you want to try to build one! Watch the associated zoom recording in the doc.
Then, use @Dustin_Good1 ’s free/custom chatGPT helper that has a ton of contextual knowledge on packs as your assistant. You got this.