Currently aiming for the following new internal API:

-Owner       string // optional email of owner; empty means golang-dev
-OwnerGithub string // optional GitHub username of owner
+Owners []string // owner entries (can be "github.com/{username}" or email); empty means golang-dev

With a gh helper to make the "github.com/{username}" strings a bit shorter. For example:

Owners: []string{gh("@tuxillo")},

I considered making use of the x/build/internal/gophers package, but that might be one extra step for anyone less familiar with x/build to deal with, so leaving that for later (it's not clear that it'd be better).

One way using x/build/internal/gophers helps is to be able to tell when a GitHub username and email belong to the same person, and avoid displaying/tracking both. It also helps reduce some duplication and chance of typos going unnoticed, and fewer places to update when contact info changes. So, I decided to just go ahead and use it now.

Change https://golang.org/cl/363983 mentions this issue: dashboard, cmd/coordinator: support multiple builder owners