I never understood why croc chose to copy the features of Magic Wormhole but implement them in an incompatible way.
Partially out of my annoyance with this I implemented a port of Magic Wormhole in Go that fully interoperates with the official python version: https://github.com/psanford/wormhole-william
Partially out of my annoyance with this I implemented a port of Magic Wormhole in Go that fully interoperates with the official python version: https://github.com/psanford/wormhole-william