Save an account when your champion leaves

My champion at a customer account just left or changed roles. I need a plan before renewal. Account: {{company, what they use us for, contract value, renewal date}}. Champion: {{role, what they personally cared about, what they left behind}}. Other contacts I have: {{names, roles, last interaction}}. Usage signal: {{who logs in, how often, which teams}}.

Produce:
1. EXPOSURE - state plainly how much of this relationship existed only in one person's head, and the evidence for that.
2. WHO INHERITS - the likely new owner of the problem we solve, by role, and what they will be measured on in their first 90 days.
3. FIRST TOUCH - an email under 120 words to the most likely inheritor. No condolences about the departure, no "reaching out", no mention of renewal.
4. VALUE RECONSTRUCTION - the three facts about our impact that must be re-proved to someone who was not there, and where each one comes from.
5. THIRTY-DAY PLAN - week by week, with the specific signal that means this account is now safe.

Do not assume the departure is bad news. Do not invent usage data.