Do you know when the change request cutoff date is? I have a WIP that is almost finished and I would like to get it in before 1.13 is no longer accepting new code.

See https://github.com/golang/go/wiki/Go-Release-Cycle. We're one month into the three-month freeze, so it's unlikely that new features are going to be merged in before the tree reopens.

Bugfixes are still welcome, though, as long as they're safe enough for 1.13.

cool