Review immediately. Overnight PRs reviewed the next morning.
Label PRs with one of the following:
breaking - The code change in the pull request is backward-compatible with the existing published version of the software.
non-breaking - The code change in the pull request is fully backward-compatible with the existing published version of the software.
next-major - The code change in the pull request may be breaking or non-breaking but is intended to be published in the next major release of the software.
next-minor - The code change in the pull request may only be non-breaking and is intended to be published in the next minor release of the software.
next-patch - The code change in the pull request may only be non-breaking and is intended to be published in the next patch release of the software.
experimental - The code change is experimental and is only intended for peer reivew and local testing.
TBD
enhancement ... I think this is where our process falls down a little. We don't have a concrete idea of what makes a decision 'decided' unless there's a patch and +2. Sometimes it's nice to hammer down "that's a good idea" before actually writing a lot.