What VRA checks first
- The relevant building or city function is unlocked and visible.
- Existing and completed queues are distinguished from idle capacity.
- Resources, workers and configured prerequisite rules allow the requested operation.
Outcomes
Repair Wall reaches and verifies its declared customer-visible terminal state.
Queue already active
No idle worker or eligible upgrade
Prerequisite or resources unavailable
When VRA stops
- The destination or required control cannot be identified safely.
- A possible side effect cannot be reconciled.
- The bounded action or recovery deadline is exhausted.
- The observed state falls outside the released support contract.