Arvados

Here is a potentially useful streaming zip library: https://github.com/scosman/zipstreamer

In fact, the heavy lifting seems to be all in the "archive/zip" standard library module:

https://pkg.go.dev/archive/zip

The standard module even has feature that walks an entire "FS" object and packs all the files -- perfect for packing up a whole collection.

So zipstreamer might not actually add anything we need.