Comment 1 for bug 1660970

snap info will complete against "any snap name", meaning it will complete directories (so you can find .snaps or directories that have a meta/snap.yaml), installed snaps, and remote snaps. This isn't a priority order, but the remote snaps will only complete if you give it at least three characters to search for (this is the only part that is weird I think, but knowing it also allows you to cheat). It seems to work well for me: having the 'http' snap installed, in a directory with a 'httputil' subdirectory, 'snap info ht<tab>' completes to http and a second tab will offer http, httpstat, and httputil/, as expected. Having rocketchat-server installed, "snap info ro<tab>" offers rocketchat-server, whereas "snap info roc<tab>" only completes as far as rocketchat- because of it now also doing a remote search and finding more stuff.

I'll look into making snap interfaces complete; I thought that was done already (it's probably going to be a two-liner diff to make it work, as the completion logic is already done for connect)

And snap run should be doable :-) I'll get on it in a bit. I think it's the only one completing on snap.app so it'll be more work.