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E4.M3 — SeamlessHandoffAndRegionState

Summary

Field Value
Module ID E4.M3
Epic Epic 4 — World Topology
Stage target Pre-production
Status Planned (see dependency register)

Purpose

Cross-region handoff behavior and region authority boundaries. Minimal spike: two regions with authority transfer and no duplicate entities.

Epic note: Depends on backend world services in addition to E4.M1; those integrations are out-of-repo contracts until defined.

Responsibilities

  • Orchestrate RegionHandoffEvent; model RegionAuthority and TransferState during handoff.

Key contracts

Contract Role
RegionHandoffEvent Start/complete/fail lifecycle.
RegionAuthority Which service owns simulation for an entity.
TransferState Serializable handoff payload.

Module dependencies

  • E4.M1 — ZoneGraphAndTravelRules.

Dependents (by design)

  • World/shard services (external); client runtime for loading/streaming.

Related implementation slices

Epic 4 Slice 4 — region_handoff_start, region_handoff_complete, rollback path documented.

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