quickly send files or control signals between machines by piping them on the command line, with bidirectional authentication and metadata resistance via tor (built on cwtch)
includes a way to quickly exchange onion addresses using a low-entropy shared secret (using pairwise socialist millionaires' protocol on a bbs) and a contact manager
the pairing feature is experimental and kinda flakey right now. you may find it easier to `sendafriend info` to get your identity string, transfer it over some other secure channel, and then `sendafriend add [make-up-a-name] [identity string]` to add it to the contact list