How soon will that be, do you suppose? It's not a blocker for most of my projects, but I can think of a few that I'd like to keep more closed (while still making them publicly cloneable). That doesn't keep me from using Tangled today for the open repos. It just means I'd need to have at least a couple of sharing setups - Tangled plus Forgejo - going at the same time for a while.

Also, will Tangled support private repos that are only visible or fetchable to specific people? Would that even make sense in its model?

for collaboration policies: its already part of the protocol, just needs to be baked into the flagship client!

private repos are coming very soon, we have a working demo of private repositories.