I am trying to integrate Courier with Formulate to be able to transfer form data from my test site to production.

My question is specific to the HandlePack method within custom ItemProviders. My understanding was that this data would be packed on the sender side, sent to production, unpacked and compared to the data on the production side.

When debugging, HandlePack is only being run on the receiving (production) side and then it doesn't detect any changes.

Is this typical behavior for Courier? Is the packing supposed to be done on the receiving end?