# Lane D — Netcode (DEFERRED — starts after M0 slice integrates)

Scope when it opens: authoritative Node room server (headless Rapier), 8-player
rooms, client interpolation, input-command protocol, server-side coverage/buff
computation (never trust client %), docker deploy to the games VPS.

Blocking prerequisite: Lane A's sim contract stable (fixed-step, deterministic
inputs) — the integration slice defines the tick/ownership boundary this lane
codes against. Anti-cheat posture is GDD §5.7/§12: server owns physics + paint.