Decide which UE5 systems are deliberately out of scope for the current phase and write bans an agent will actually respect — replication and networking, ability and gameplay-effect frameworks, Mass Entity and ECS paths, World Partition and large-world streaming, and test infrastructure beyond the minimum. Use when starting a prototype or vertical slice, when an agent proposes a heavyweight subsystem for a small problem, when an installed skill recommends a system the phase does not need, when scope keeps growing without a decision, or when deciding whether a ban should now lift.