"We are going to work on trust" is not a plan.
It is an intention.
After betrayal, intentions need structure.
A trust rebuild plan does not guarantee reconciliation.
It gives both people a way to see whether reconciliation is becoming more realistic.
Step 1: establish the truth
Before rebuilding, both people need to know what they are rebuilding from.
Agree on the factual questions that must be answered.
Timeline.
Contact.