In my Pulumi console, under each project I see many stacks that have 0 resources in them (which existed for some branch deploy, but those branches no longer exist). Is there a way I can hide stacks without resources, or otherwise really destroy a stack?

you need to do

pulumi stack rm <stackname>

or use

workspace.RemoveStack

Perfect, thanks! I had been calling

stack.destroy

, but not

stack.workspace.removeStack

.