I did this alone but I agree with these for both:

We will never mention divorce

we will not bring up old unrelated issues from the past

we will never fight in public or in front of kids

we will call time out before it gets hurtful

failure is not an option we will work this out

For myself:

I will listen before speaking quick to hear slow to speak slow to anger

I will deal with my own issues upfront quickly admit when I'm wrong apologize first

Speak gently harsh words stir up anger, fight fair