Thanks for pointing it out, README is outdated, .rapel-state.json is not being used anymore, as the current state is now calculated from the chunk files downloaded. It doesn't detect remote file changes.
I tried using existing solutions like aria2, but rapel is built to work on constrained machines with limited storage, like a raspberry pi running 24/7. You can use the post-part argument so that after downloading a chunk, you can do something with it (eg. upload it) and remove it afterward. Then, on another bigger machine, download the chunks and merge them
This is similar to what happened with smartphones and the people going back to cellphones without touchscreen.
AI coding hurts your ego. People keep forgetting this is just a tool that accelerate what you want to do. If you leave decisions to the AI you'll be probably disappointed or surprised.
Another thing about this is that artists permit themselves to not fully understand the technology of things, so they just use it, in a way that maybe the ones who understand how it works doesn't because they are already fascinated with how it works