pack archive | ssh host2 pack extract
Which is a weird gripe - in this use case, `tar` makes most sense to use. It's not like this format claims to be a full replacement for tar or anything close to that.
> Most popular solutions like Zip, gzip, tar, RAR, or 7-Zip are near or more than three decades old. While holding value for such a long time (in the computer world) is testimony to their greatness, the work is far from done.
> Pack tries to continue this path as the next step and proposes the next universal choice in the field.
About piping, it can be done, and it is on my list. I will finish features based on their popularity and making sense.
As Pack has random access support, you can choose a file in a big pack, and it can stream it out to the output. It is already able to unpack partially to your file system (using --include="file path in pack"); streaming/piping it would not be a problem.