Broken agreements…how do they fit?

I love love, love that the model brings together so many of the other teaching I have read about.
One thing I am pondering is an idea from Gay Hendricks, Conscious Loving: The Journey to Co-Commitment.
In the book, he talks about the importance of keeping agreements.
I understand managing my mind around the experience of a broken agreement and I am improving (without denying or blocking the feelings).
Is an agreement different than a manual?