Trellis Bank: Use collapsed after a prompt change that made responses longer.

The problem

Branch staff had stopped using an onboarding assistant, and nobody could say when or why.

What we did

Assembly tracked sustained use rather than activation, per branch and per task type.

The result

Use collapsed after a prompt change that made responses longer. Reverting it restored adoption within a week.

Activation looked fine forever. Nobody was measuring whether people came back.