Handover note for a live issue

Write an internal handover note.

The issue: {{issue}}
Done so far: {{doneSoFar}}

Four lines: where it stands, what has been ruled out, the next thing to try, and
what the customer has been told — that last one matters most, because contradicting
it is the fastest way to lose them.

No narrative. The next person is reading this in a hurry.

What to fill in

{{issue}}

The issue — e.g. a customer's shared board stopped updating

{{doneSoFar}}

What you've done — e.g. confirmed both signed in; ruled out the entitlement