Within the documentation and config files of stubby you use the address 0::1 for the IPv6 local loopback address (which does work) but I cannot find anywhere else that uses this form, everyone use ::1

I think these instances should be changed to keep things easier to read unless there is a technical reason for this.

These are a few that I found
README.md

listen_addresses:
  - 127.0.0.1
  -  0::1

stubby.yml.example