/etc/desgins/<project_name> path is not recommended in 6.4 but it would still work without any issues.
Same goes with static templates meaning that it would work without any issues.
Are you trying to find design dialog to add your components on page for that static template in touch UI? If yes, you would need to navigate to Design mode from Edit mode to add the components on parsys/container. Refer to - Static Template on the ADOBE AEM 6.4
Thanks for your help. I'll try adding back /etc/designs/project for now to see if that helps.
I'm aware how to add components into the component browser by going to the design mode. However, I want to have that defined on the template level (much like a policy in the new editable templates) so that the author doesn't have to keep doing that after creating a page with that template. Is there a way to do this in 6.4 anymore for static templates?