> and the guidance we got was to use an existing non-google github account for contributions if you had one and wanted to.
This is correct. Use an existing github account, but your contributions should be under your @google email address. There's nothing that ties your github account to a git email. I've committed through github from like 4 different email addresses (@google, @gmail, @uni.edu, and a shared organizational one for a project from a shared machine).
Ah gotcha, yes we're agreed then. The underlying commits are supposed to be tied to your @google account (though a not insignificant number slip through)
This is correct. Use an existing github account, but your contributions should be under your @google email address. There's nothing that ties your github account to a git email. I've committed through github from like 4 different email addresses (@google, @gmail, @uni.edu, and a shared organizational one for a project from a shared machine).