# 0004: Netcode Per Cell

Status: Accepted

Date: 2026-05-25

## Context

V5 includes single-player campaigns, high-density open-world multiplayer,
bounded co-op, and twitch PvP. One replication model would either over-serve
offline content or under-serve competitive modes.

## Decision

V5 uses dedicated client-server as the default model, rollback-emulated
prediction for twitch PvP, and offline-deterministic execution for single-player
simulation paths that do not require online authority.

## Consequences

- Urban Freeroam, Frontier Posse, and Capital Raid use authoritative dedicated
  servers.
- Urban Deathmatch and Ship Duel can opt into rollback-emulated prediction.
- Offline campaigns remain playable without deterministic gameplay depending on
  service responses.