Slice 3: Expedition Combat Spine — epoch-seeded zone waves (DR-040)

Reactivate the dormant Expedition region as a procedural combat venue.
v1 loop: walk the gate -> fight an epoch-seeded enemy wave in the
expedition -> clear -> return -> flat Ore reward (once per epoch) ->
escalated retaliation base siege.

- New sim types: ZoneEnemyTag, ZoneEnemyDirector (+ ZoneEnemyPrefab
  buffer), ZoneEnemyState, ZoneEnemyMath (grunt->charger composition
  by epoch). ZoneEnemyDirectorSystem (server, Burst): drip-spawns the
  wave at a deterministic ring under a MaxAlive cap while a player is
  out and the base is Calm; marks ClearedThisEpoch on a real clear.
  [UpdateAfter(ExpeditionFieldSystem)] only (avoids a sort cycle).
- BLOCKER 1: EnemyAISystem region-filters target selection (player +
  structure snapshots gain parallel region lists; no base structures /
  no Core fallback for expedition husks).
- BLOCKER 3: WaveSystem, ThreatDirectorSystem timeout cull, and
  CyclePhaseSystem DefendCleared + Core-breach cull all count/cull
  RegionTag{Base} husks only (the breach cull was caught region-blind
  by the post-impl review: a base breach wiped the live expedition
  wave and spuriously paid the reward).
- BLOCKER 4: reward de-duped via CycleRuntime.LastRewardedEpoch +
  ClearedThisEpoch; ExpeditionGateSystem deposits RewardOre once/epoch.
- ExpeditionFieldSystem teardown also culls zone enemies + region-
  guards the clutter loop. Subscene wired with the director + roster.

368/368 EditMode green + clean netcode Play smoke. Docs: DR-040 ->
built, session log, CLAUDE.md cross-region tag-reaudit rule.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/_Project/Scripts/Authoring/Combat/ZoneEnemyDirectorAuthoring.cs

@@ -0,0 +1,65 @@
+using ProjectM.Simulation;
+using Unity.Entities;
+using UnityEngine;
+
+namespace ProjectM.Authoring
+{
+    /// <summary>
+    /// Authoring for the expedition zone-enemy director (singleton). Place ONE on a GameObject in the gameplay
+    /// subscene; the server-only <c>ZoneEnemyDirectorSystem</c> reads it. Bakes a <see cref="ZoneEnemyDirector"/>
+    /// config + a <see cref="ZoneEnemyPrefab"/> pool (index 0 = Grunt variant, index 1 = Charger variant — the
+    /// epoch-seeded composition picks between them) + the initial <see cref="ZoneEnemyState"/>. The entity carries no
+    /// transform; only the referenced prefabs need a runtime transform. The prefabs ALIAS the existing Husk ghost
+    /// prefabs, so zone enemies reuse the whole combat/readability stack with no new ghost type.
+    /// </summary>
+    public class ZoneEnemyDirectorAuthoring : MonoBehaviour
+    {
+        [Tooltip("Zone-enemy variant prefabs. Index 0 = Grunt, index 1 = Charger. Each must carry EnemyAuthoring + an interpolated GhostAuthoringComponent.")]
+        public GameObject[] EnemyPrefabs;
+
+        [Min(1), Tooltip("Max concurrent live zone enemies (the v1 ghost-relevancy budget).")] public int MaxAlive = 12;
+        [Min(0f)] public float RingRadius = 14f;
+        [Min(1)] public int RingSlots = 10;
+        [Min(1), Tooltip("Ticks between individual spawns within a wave (~60/sec).")] public int SpawnIntervalTicks = 30;
+        [Min(0), Tooltip("Grunts in the epoch-1 wave (held roughly constant as the epoch climbs).")] public int GruntsPerWave = 4;
+        [Min(0), Tooltip("Chargers in the epoch-1 wave (grows ~1 per epoch -> charger-heavy).")] public int ChargersPerWave = 1;
+        [Min(0), Tooltip("Flat Ore banked to the shared ledger on a real clear, once per sortie.")] public int RewardOre = 25;
+
+        private class ZoneEnemyDirectorBaker : Baker<ZoneEnemyDirectorAuthoring>
+        {
+            public override void Bake(ZoneEnemyDirectorAuthoring authoring)
+            {
+                var entity = GetEntity(authoring, TransformUsageFlags.None);
+
+                AddComponent(entity, new ZoneEnemyDirector
+                {
+                    MaxAlive = authoring.MaxAlive,
+                    RingRadius = authoring.RingRadius,
+                    RingSlots = authoring.RingSlots,
+                    SpawnIntervalTicks = authoring.SpawnIntervalTicks,
+                    GruntsPerWave = authoring.GruntsPerWave,
+                    ChargersPerWave = authoring.ChargersPerWave,
+                    RewardOre = authoring.RewardOre,
+                });
+
+                var buffer = AddBuffer<ZoneEnemyPrefab>(entity);
+                if (authoring.EnemyPrefabs != null)
+                {
+                    foreach (var prefab in authoring.EnemyPrefabs)
+                    {
+                        if (prefab != null)
+                            buffer.Add(new ZoneEnemyPrefab { Prefab = GetEntity(prefab, TransformUsageFlags.Dynamic) });
+                    }
+                }
+
+                AddComponent(entity, new ZoneEnemyState
+                {
+                    SpawnCounter = 0,
+                    RemainingToSpawn = 0,
+                    NextSpawnTick = 0,
+                    SeededEpoch = 0,
+                });
+            }
+        }
+    }
+}

Assets/_Project/Scripts/Authoring/Combat/ZoneEnemyDirectorAuthoring.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 5918787bb2ebb7747afe473a7937ed53

Assets/_Project/Scripts/Server/Combat/EnemyAISystem.cs

@@ -40,8 +40,9 @@ namespace ProjectM.Server
             // Snapshot living player targets once this tick (stable query order).
             var playerEntities = new NativeList<Entity>(Allocator.Temp);
             var playerPositions = new NativeList<float3>(Allocator.Temp);
-            foreach (var (xform, health, entity) in
-                     SystemAPI.Query<RefRO<LocalTransform>, RefRO<Health>>()
+            var playerRegions = new NativeList<byte>(Allocator.Temp);
+            foreach (var (xform, health, region, entity) in
+                     SystemAPI.Query<RefRO<LocalTransform>, RefRO<Health>, RefRO<RegionTag>>()
                          .WithAll<PlayerTag>()
                          .WithEntityAccess())
             {
@@ -49,6 +50,7 @@ namespace ProjectM.Server
                     continue; // don't chase or strike a corpse
                 playerEntities.Add(entity);
                 playerPositions.Add(xform.ValueRO.Position);
+                playerRegions.Add(region.ValueRO.Region);
             }
 
             // EB-1 fortress aggro: also snapshot live structures (Turret/Wall/Pylon carry Health; automation
@@ -56,8 +58,9 @@ namespace ProjectM.Server
             // the base even with every player dead/away (the locked 'push for structures' fork).
             var structureEntities = new NativeList<Entity>(Allocator.Temp);
             var structurePositions = new NativeList<float3>(Allocator.Temp);
-            foreach (var (sx, sh, se) in
-                     SystemAPI.Query<RefRO<LocalTransform>, RefRO<Health>>()
+            var structureRegions = new NativeList<byte>(Allocator.Temp);
+            foreach (var (sx, sh, sr, se) in
+                     SystemAPI.Query<RefRO<LocalTransform>, RefRO<Health>, RefRO<RegionTag>>()
                          .WithAll<PlacedStructure>()
                          .WithEntityAccess())
             {
@@ -65,6 +68,7 @@ namespace ProjectM.Server
                     continue; // skip a structure already at 0 (pending destroy this tick)
                 structureEntities.Add(se);
                 structurePositions.Add(sx.ValueRO.Position);
+                structureRegions.Add(sr.ValueRO.Region);
             }
 
             // END-1: the Engine Core is a FALLBACK target. When no living player/structure remains, undefended
@@ -77,8 +81,10 @@ namespace ProjectM.Server
             {
                 playerEntities.Dispose();
                 playerPositions.Dispose();
+                playerRegions.Dispose();
                 structureEntities.Dispose();
                 structurePositions.Dispose();
+                structureRegions.Dispose();
                 return;
             }
 
@@ -95,12 +101,14 @@ namespace ProjectM.Server
             bool sweep = havePhysics && envMask != 0u;
             const float SweepRadius = 0.5f; // collide-and-slide sphere radius for Husk movement
 
-            foreach (var (xform, stats, cooldown, knockback, windup) in
+            foreach (var (xform, stats, cooldown, knockback, windup, region) in
                      SystemAPI.Query<RefRW<LocalTransform>, RefRO<EnemyStats>, RefRW<EnemyAttackCooldown>,
-                             RefRW<KnockbackState>, RefRW<AttackWindup>>()
+                             RefRW<KnockbackState>, RefRW<AttackWindup>, RefRO<RegionTag>>()
                          .WithAll<EnemyTag>().WithNone<LungeState>())
             {
                 float3 pos = xform.ValueRO.Position;
+                byte huskRegion = region.ValueRO.Region;
+                bool huskCoreAlive = coreAlive && huskRegion == RegionId.Base;
 
                 // Knockback overrides seek/strike for its window — EnemyAISystem stays the SOLE writer of Position.
                 var kb = knockback.ValueRO;
@@ -122,8 +130,8 @@ namespace ProjectM.Server
 
                 // EB-1 fortress aggro: nearest of players (weight 1) + structures (StructureAggroWeight) — a wall/
                 // turret is the preferred target unless a player is in the way (closer after weighting).
-                EnemyAIMath.PickWeightedNearest(pos, playerPositions, structurePositions, structAggro, out bool tgtIsStruct, out int tgtIdx);
-                if (tgtIdx < 0 && !coreAlive)
+                EnemyAIMath.PickWeightedNearest(pos, playerPositions, playerRegions, structurePositions, structureRegions, huskRegion, structAggro, out bool tgtIsStruct, out int tgtIdx);
+                if (tgtIdx < 0 && !huskCoreAlive)
                     continue; // no player/structure and no Core -> nothing to seek
                 Entity targetEntity = tgtIdx < 0 ? Entity.Null
                     : (tgtIsStruct ? structureEntities[tgtIdx] : playerEntities[tgtIdx]);
@@ -201,12 +209,14 @@ namespace ProjectM.Server
             uint  ChargerWindupTicks = (uint)math.max(1f, tune.ChargerWindupTicks); // readable telegraph lead
             uint  ChargerWhiffStaggerTicks = (uint)math.max(1f, tune.ChargerWhiffStaggerTicks);   // punish window
             uint chargerWhiffsThisTick = 0;
-            foreach (var (xform, stats, cooldown, knockback, windup, lunge) in
+            foreach (var (xform, stats, cooldown, knockback, windup, lunge, region) in
                      SystemAPI.Query<RefRW<LocalTransform>, RefRO<EnemyStats>, RefRW<EnemyAttackCooldown>,
-                             RefRW<KnockbackState>, RefRW<AttackWindup>, RefRW<LungeState>>()
+                             RefRW<KnockbackState>, RefRW<AttackWindup>, RefRW<LungeState>, RefRO<RegionTag>>()
                          .WithAll<EnemyTag>())
             {
                 float3 pos = xform.ValueRO.Position;
+                byte cHuskRegion = region.ValueRO.Region;
+                bool cHuskCoreAlive = coreAlive && cHuskRegion == RegionId.Base;
 
                 // 1. Knockback wins (and cancels any in-flight lunge so Position keeps a single writer).
                 var kb = knockback.ValueRO;
@@ -227,8 +237,8 @@ namespace ProjectM.Server
                 }
 
                 // EB-1 fortress aggro: same weighted target selection as the Grunt pass (shared helper).
-                EnemyAIMath.PickWeightedNearest(pos, playerPositions, structurePositions, structAggro, out bool cIsStruct, out int cIdx);
-                if (cIdx < 0 && !coreAlive)
+                EnemyAIMath.PickWeightedNearest(pos, playerPositions, playerRegions, structurePositions, structureRegions, cHuskRegion, structAggro, out bool cIsStruct, out int cIdx);
+                if (cIdx < 0 && !cHuskCoreAlive)
                     continue;
                 Entity cTargetEntity = cIdx < 0 ? Entity.Null
                     : (cIsStruct ? structureEntities[cIdx] : playerEntities[cIdx]);
@@ -340,8 +350,10 @@ namespace ProjectM.Server
             ecb.Dispose();
             playerEntities.Dispose();
             playerPositions.Dispose();
+            playerRegions.Dispose();
             structureEntities.Dispose();
             structurePositions.Dispose();
+            structureRegions.Dispose();
         }
 
         // Swept collide-and-slide for server-authoritative Husk movement: sphere-cast the intended step against

Assets/_Project/Scripts/Server/Combat/WaveSystem.cs

@@ -23,7 +23,6 @@ namespace ProjectM.Server
     [UpdateInGroup(typeof(SimulationSystemGroup))]
     public partial struct WaveSystem : ISystem
     {
-        EntityQuery m_AliveHusks;
 
         [BurstCompile]
         public void OnCreate(ref SystemState state)
@@ -31,7 +30,6 @@ namespace ProjectM.Server
             state.RequireForUpdate<WaveDirector>();
             state.RequireForUpdate<WaveState>();
             state.RequireForUpdate<NetworkTime>();
-            m_AliveHusks = state.GetEntityQuery(ComponentType.ReadOnly<EnemyTag>());
         }
 
         [BurstCompile]
@@ -100,11 +98,19 @@ namespace ProjectM.Server
                         wave.NextActionTick = TickUtil.NonZero(now + (uint)math.max(1, director.SpawnIntervalTicks));
                     }
                 }
-                else if (m_AliveHusks.CalculateEntityCount() == 0)
+                else
                 {
-                    // Wave cleared: calm before the next.
-                    wave.Phase = WavePhase.Lull;
-                    wave.NextActionTick = TickUtil.NonZero(now + (uint)math.max(1, director.LullTicks));
+                    // Wave fully spawned: cleared only when no BASE husk remains. Expedition zone enemies are also
+                    // EnemyTag but RegionTag{Expedition}; they must NOT hold the base siege open (DR-040 BLOCKER 3).
+                    int baseHusks = 0;
+                    foreach (var hr in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>())
+                        if (hr.ValueRO.Region == RegionId.Base) baseHusks++;
+                    if (baseHusks == 0)
+                    {
+                        // Wave cleared: calm before the next.
+                        wave.Phase = WavePhase.Lull;
+                        wave.NextActionTick = TickUtil.NonZero(now + (uint)math.max(1, director.LullTicks));
+                    }
                 }
             }
 

Assets/_Project/Scripts/Server/Combat/ZoneEnemyDirectorSystem.cs

@@ -0,0 +1,134 @@
+using ProjectM.Simulation;
+using Unity.Burst;
+using Unity.Collections;
+using Unity.Entities;
+using Unity.Mathematics;
+using Unity.NetCode;
+using Unity.Transforms;
+
+namespace ProjectM.Server
+{
+    /// <summary>
+    /// Server-only expedition zone-enemy director: while a player is OUT in the expedition region and the base is in
+    /// <see cref="CyclePhase.Calm"/>, it seeds and drip-spawns one epoch-seeded combat wave around the expedition
+    /// origin. The wave size + grunt/charger composition is pure <see cref="ZoneEnemyMath"/> of the
+    /// <see cref="CycleRuntime.ExpeditionEpoch"/> (grunt-heavy -&gt; charger-heavy as the epoch climbs), spawned one
+    /// every <see cref="ZoneEnemyDirector.SpawnIntervalTicks"/> at a deterministic ring, capped at
+    /// <see cref="ZoneEnemyDirector.MaxAlive"/> concurrent (the v1 ghost-relevancy budget). Each enemy is the
+    /// existing Husk ghost prefab + <c>RegionTag{Expedition}</c> + <see cref="ZoneEnemyTag"/>, so it reuses the whole
+    /// combat/readability/AI stack (the per-region AI filter keeps it seeking the expedition player only). When the
+    /// wave is fully spawned and every zone enemy is dead, it marks <see cref="CycleRuntime.ClearedThisEpoch"/> once —
+    /// the gate's once-per-epoch Ore reward reads that on the player's return.
+    ///
+    /// Ordering: <c>[UpdateAfter(ExpeditionFieldSystem)]</c> ONLY. ExpeditionFieldSystem is itself
+    /// <c>[UpdateAfter(CyclePhaseSystem)]</c>, so ALSO declaring <c>[UpdateBefore(CyclePhaseSystem)]</c> here (as the
+    /// v1 plan first sketched) would close a CyclePhase-&gt;Field-&gt;Zone-&gt;CyclePhase sort cycle that throws at Play
+    /// world creation and is invisible to EditMode. Running after the field manager also reads the freshly-bumped
+    /// epoch + current phase. Zone enemies are interpolated ghosts, moved server-only — no prediction.
+    /// </summary>
+    [BurstCompile]
+    [WorldSystemFilter(WorldSystemFilterFlags.ServerSimulation)]
+    [UpdateInGroup(typeof(SimulationSystemGroup))]
+    [UpdateAfter(typeof(ExpeditionFieldSystem))]
+    public partial struct ZoneEnemyDirectorSystem : ISystem
+    {
+        EntityQuery m_ZoneEnemies;
+
+        [BurstCompile]
+        public void OnCreate(ref SystemState state)
+        {
+            state.RequireForUpdate<NetworkTime>();
+            state.RequireForUpdate<CycleState>();
+            state.RequireForUpdate<ZoneEnemyDirector>();
+            m_ZoneEnemies = state.GetEntityQuery(ComponentType.ReadOnly<ZoneEnemyTag>());
+        }
+
+        [BurstCompile]
+        public void OnUpdate(ref SystemState state)
+        {
+            var serverTick = SystemAPI.GetSingleton<NetworkTime>().ServerTick;
+            if (!serverTick.IsValid)
+                return;
+            uint now = serverTick.TickIndexForValidTick;
+
+            // Per-player presence: only run while someone is OUT in the expedition (mirrors ExpeditionFieldSystem).
+            int expeditionPlayers = 0;
+            foreach (var region in SystemAPI.Query<RefRO<RegionTag>>().WithAll<PlayerTag>())
+                if (region.ValueRO.Region == RegionId.Expedition)
+                    expeditionPlayers++;
+            if (expeditionPlayers == 0)
+                return; // nobody out there: the field manager owns teardown, we do nothing
+
+            var directorEntity = SystemAPI.GetSingletonEntity<ZoneEnemyDirector>();
+            var dir = SystemAPI.GetComponent<ZoneEnemyDirector>(directorEntity);
+            var zs = SystemAPI.GetComponent<ZoneEnemyState>(directorEntity);
+            var prefabs = SystemAPI.GetBuffer<ZoneEnemyPrefab>(directorEntity);
+            if (prefabs.Length == 0)
+                return;
+
+            var cycleEntity = SystemAPI.GetSingletonEntity<CycleState>();
+            var cycle = SystemAPI.GetComponent<CycleState>(cycleEntity);
+            var runtime = SystemAPI.GetComponent<CycleRuntime>(cycleEntity);
+            int epoch = runtime.ExpeditionEpoch;
+
+            // (Re)seed this epoch's wave once — its OWN counter, never WaveState's.
+            if (zs.SeededEpoch != epoch)
+            {
+                zs.SeededEpoch = epoch;
+                zs.SpawnCounter = 0;
+                zs.RemainingToSpawn = ZoneEnemyMath.WaveSize(epoch, dir.GruntsPerWave, dir.ChargersPerWave);
+                zs.NextSpawnTick = TickUtil.NonZero(now); // first enemy this tick
+            }
+
+            int aliveZone = m_ZoneEnemies.CalculateEntityCount();
+
+            if (zs.RemainingToSpawn > 0)
+            {
+                // Spawn only in Calm (a base Siege pauses the expedition wave; it resumes when the base is safe), one
+                // per cadence, and only while under the concurrent cap.
+                bool calm = cycle.Phase == CyclePhase.Calm;
+                bool dueNow = zs.NextSpawnTick == 0 || !new NetworkTick(zs.NextSpawnTick).IsNewerThan(serverTick);
+                if (calm && dueNow && aliveZone < math.max(1, dir.MaxAlive))
+                {
+                    float3 baseCenter = new float3(0f, 1f, 0f);
+                    if (SystemAPI.TryGetSingleton<BaseAnchor>(out var anchor))
+                        baseCenter = BaseGridMath.PlotCenter(anchor);
+                    float3 origin = RegionMath.RegionOrigin(RegionId.Expedition, baseCenter);
+
+                    int slot = (int)zs.SpawnCounter;
+                    bool charger = ZoneEnemyMath.IsChargerSlot(epoch, slot, dir.GruntsPerWave, dir.ChargersPerWave);
+                    int prefabIdx = charger ? 1 : 0;
+                    if (prefabIdx >= prefabs.Length) prefabIdx = prefabs.Length - 1;
+                    var prefab = prefabs[prefabIdx].Prefab;
+
+                    float3 pos = EnemyAIMath.RingPosition(origin, slot, math.max(1, dir.RingSlots), dir.RingRadius);
+                    pos.y = origin.y;
+
+                    var ecb = new EntityCommandBuffer(Allocator.Temp);
+                    var enemy = ecb.Instantiate(prefab);
+                    // Preserve the prefab's baked Scale ([GhostField]) + rotation — FromPosition would reset Scale->1.
+                    var baked = state.EntityManager.GetComponentData<LocalTransform>(prefab);
+                    ecb.SetComponent(enemy, baked.WithPosition(pos));
+                    ecb.AddComponent(enemy, new RegionTag { Region = RegionId.Expedition });
+                    ecb.AddComponent<ZoneEnemyTag>(enemy);
+                    ecb.Playback(state.EntityManager);
+                    ecb.Dispose();
+
+                    zs.SpawnCounter += 1;
+                    zs.RemainingToSpawn -= 1;
+                    zs.NextSpawnTick = TickUtil.NonZero(now + (uint)math.max(1, dir.SpawnIntervalTicks));
+                }
+            }
+            else if (aliveZone == 0 && runtime.ClearedThisEpoch == 0)
+            {
+                // Wave fully spawned AND every zone enemy dead -> a REAL clear (the player killed them; the empty-edge
+                // teardown can't reach here because we early-return when no one is out). Mark once; the gate pays the
+                // once-per-epoch Ore reward on the player's return to base.
+                runtime.ClearedThisEpoch = 1;
+                SystemAPI.SetComponent(cycleEntity, runtime);
+            }
+
+            SystemAPI.SetComponent(directorEntity, zs);
+        }
+    }
+}

Assets/_Project/Scripts/Server/Combat/ZoneEnemyDirectorSystem.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4dc121e99d0e53640b5e6815640a0bc6

Assets/_Project/Scripts/Server/Economy/ExpeditionFieldSystem.cs

@@ -50,7 +50,10 @@ namespace ProjectM.Server
 
             // empty -> occupied: a new sortie begins; bump the epoch so the field reseeds fresh.
             if (occupied && !wasOccupied)
+            {
                 runtime.ExpeditionEpoch += 1;
+                runtime.ClearedThisEpoch = 0; // a fresh sortie has not been cleared yet (gates the once-per-epoch reward)
+            }
 
             float3 baseCenter = new float3(0f, 1f, 0f);
             if (SystemAPI.TryGetSingleton<BaseAnchor>(out var anchor))
@@ -112,7 +115,7 @@ namespace ProjectM.Server
                 runtime.LastSpawnedEpoch = runtime.ExpeditionEpoch;
             }
 
-            // DESTROY: the last player left the expedition — clear the whole field (nodes + clutter).
+            // DESTROY: the last player left the expedition — clear the whole field (nodes + clutter + zone enemies).
             if (wasOccupied && !occupied)
             {
                 // Only EXPEDITION nodes — the base field is permanent RegionTag{Base} and must NOT be torn down here.
@@ -120,8 +123,17 @@ namespace ProjectM.Server
                          SystemAPI.Query<RefRO<ResourceNode>, RefRO<RegionTag>>().WithEntityAccess())
                     if (region.ValueRO.Region == RegionId.Expedition)
                         ecb.DestroyEntity(e);
-                foreach (var (bc, e) in SystemAPI.Query<RefRO<BlightClutter>>().WithEntityAccess())
-                    ecb.DestroyEntity(e);
+                // Blight clutter is Expedition-only today; guard by region defensively (DR-040 MINOR 1).
+                foreach (var (region, e) in
+                         SystemAPI.Query<RefRO<RegionTag>>().WithAll<BlightClutter>().WithEntityAccess())
+                    if (region.ValueRO.Region == RegionId.Expedition)
+                        ecb.DestroyEntity(e);
+                // Zone combat enemies share this single lifetime point (DR-040). EnemyTag + ZoneEnemyTag +
+                // RegionTag{Expedition}; disjoint from the node/clutter queries, so no double-destroy.
+                foreach (var (region, e) in
+                         SystemAPI.Query<RefRO<RegionTag>>().WithAll<ZoneEnemyTag>().WithEntityAccess())
+                    if (region.ValueRO.Region == RegionId.Expedition)
+                        ecb.DestroyEntity(e);
             }
 
             runtime.PrevExpeditionOccupied = (byte)(occupied ? 1 : 0);

Assets/_Project/Scripts/Server/World/CyclePhaseSystem.cs

@@ -25,14 +25,11 @@ namespace ProjectM.Server
     [UpdateBefore(typeof(WaveSystem))]
     public partial struct CyclePhaseSystem : ISystem
     {
-        EntityQuery m_AliveHusks;
-
         [BurstCompile]
         public void OnCreate(ref SystemState state)
         {
             state.RequireForUpdate<NetworkTime>();
             state.RequireForUpdate<CycleState>();
-            m_AliveHusks = state.GetEntityQuery(ComponentType.ReadOnly<EnemyTag>());
         }
 
         [BurstCompile]
@@ -104,15 +101,17 @@ namespace ProjectM.Server
                     cycle.Phase = CyclePhase.Calm;
                     cycle.PhaseEndTick = 0;
 
-                    // The siege ends: despawn every remaining Husk (the locked despawn-on-breach fork) + reset the wave
-                    // so the NEXT armed siege starts clean (WaveSystem idles in Calm anyway). Shared by both paths.
-                    var husks = m_AliveHusks.ToEntityArray(Allocator.Temp);
+                    // The siege ends: despawn the base siege Husks (the locked despawn-on-breach fork) + reset the
+                    // wave so the NEXT armed siege starts clean (WaveSystem idles in Calm anyway). Shared by both paths.
                     var ecb = new EntityCommandBuffer(Allocator.Temp);
-                    for (int hi = 0; hi < husks.Length; hi++)
-                        ecb.DestroyEntity(husks[hi]);
+                    // Slice 3: cull the BASE wave only — an Expedition wave runs in its own region and must
+                    // survive a base Core breach. A region-blind EnemyTag wipe would also spuriously trip the
+                    // zone director's aliveZone==0 clear/reward edge. Mirrors ThreatDirectorSystem + DefendCleared.
+                    foreach (var (hr, he) in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>().WithEntityAccess())
+                        if (hr.ValueRO.Region == RegionId.Base)
+                            ecb.DestroyEntity(he);
                     ecb.Playback(state.EntityManager);
                     ecb.Dispose();
-                    husks.Dispose();
                     if (SystemAPI.TryGetSingletonEntity<WaveState>(out var waveLost))
                     {
                         var wl = SystemAPI.GetComponent<WaveState>(waveLost);
@@ -189,9 +188,14 @@ namespace ProjectM.Server
         {
             if (!SystemAPI.TryGetSingleton<WaveState>(out var wave))
                 return false;
+            // Cleared only when no BASE husk remains: expedition zone enemies (EnemyTag + RegionTag{Expedition})
+            // must not hold the base siege open (DR-040 BLOCKER 3 — same global-count soft-lock as WaveSystem).
+            int baseHusks = 0;
+            foreach (var hr in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>())
+                if (hr.ValueRO.Region == RegionId.Base) baseHusks++;
             return wave.WaveNumber > defendStartWave
                    && wave.RemainingToSpawn == 0
-                   && m_AliveHusks.CalculateEntityCount() == 0;
+                   && baseHusks == 0;
         }
     }
 }

Assets/_Project/Scripts/Server/World/ExpeditionGateSystem.cs

@@ -73,12 +73,33 @@ namespace ProjectM.Server
 
             // A player returned to base from an expedition -> signal the ThreatDirector (it sizes/arms any
             // retaliation siege). The gate teleports the returner out of its radius, so this fires once per return.
-            if (returnedToBase && SystemAPI.TryGetSingletonEntity<ThreatState>(out var threatEntity))
+            if (returnedToBase)
             {
-                var threat = SystemAPI.GetComponent<ThreatState>(threatEntity);
-                threat.PendingReturns += 1;
-                threat.ExpeditionsCompleted += 1;
-                SystemAPI.SetComponent(threatEntity, threat);
+                if (SystemAPI.TryGetSingletonEntity<ThreatState>(out var threatEntity))
+                {
+                    var threat = SystemAPI.GetComponent<ThreatState>(threatEntity);
+                    threat.PendingReturns += 1;
+                    threat.ExpeditionsCompleted += 1;
+                    SystemAPI.SetComponent(threatEntity, threat);
+                }
+
+                // Once-per-epoch zone-clear reward: a returner banks flat Ore IFF this epoch's expedition wave was
+                // actually cleared and not yet rewarded. Resolved ONCE here (not per-returner) so two same-tick co-op
+                // returns pay exactly once (DR-040 BLOCKER 4) and gate re-entry before a clear can't farm (MINOR 2).
+                if (SystemAPI.HasSingleton<CycleState>()
+                    && SystemAPI.TryGetSingleton<ZoneEnemyDirector>(out var zoneDir)
+                    && SystemAPI.HasSingleton<ResourceLedger>())
+                {
+                    var cycleEntity = SystemAPI.GetSingletonEntity<CycleState>();
+                    var runtime = SystemAPI.GetComponent<CycleRuntime>(cycleEntity);
+                    if (runtime.ClearedThisEpoch != 0 && runtime.LastRewardedEpoch != runtime.ExpeditionEpoch)
+                    {
+                        var ledger = SystemAPI.GetBuffer<StorageEntry>(SystemAPI.GetSingletonEntity<ResourceLedger>());
+                        StorageMath.Deposit(ledger, (ushort)ResourceId.Ore, zoneDir.RewardOre);
+                        runtime.LastRewardedEpoch = runtime.ExpeditionEpoch;
+                        SystemAPI.SetComponent(cycleEntity, runtime);
+                    }
+                }
             }
         }
     }

Assets/_Project/Scripts/Server/World/ThreatDirectorSystem.cs

@@ -28,7 +28,6 @@ namespace ProjectM.Server
     [UpdateBefore(typeof(CyclePhaseSystem))]
     public partial struct ThreatDirectorSystem : ISystem
     {
-        EntityQuery m_Husks;
 
         [BurstCompile]
         public void OnCreate(ref SystemState state)
@@ -37,7 +36,6 @@ namespace ProjectM.Server
             state.RequireForUpdate<CycleState>();
             state.RequireForUpdate<ThreatState>();
             state.RequireForUpdate<ThreatConfig>();
-            m_Husks = state.GetEntityQuery(ComponentType.ReadOnly<EnemyTag>());
         }
 
         [BurstCompile]
@@ -109,17 +107,14 @@ namespace ProjectM.Server
                     var start = new NetworkTick(threat.SiegeStartTick);
                     if (start.IsValid && serverTick.TicksSince(start) > (int)config.SiegeTimeoutTicks)
                     {
-                        // Collapse the siege: cull every remaining Husk (a cached tag query, never RefRO on a tag).
-                        var husks = m_Husks.ToEntityArray(Allocator.Temp);
-                        if (husks.Length > 0)
-                        {
-                            var ecb = new EntityCommandBuffer(Allocator.Temp);
-                            for (int i = 0; i < husks.Length; i++)
-                                ecb.DestroyEntity(husks[i]);
-                            ecb.Playback(state.EntityManager);
-                            ecb.Dispose();
-                        }
-                        husks.Dispose();
+                        // Collapse the siege: cull every remaining BASE Husk only (expedition zone enemies are also
+                        // EnemyTag but RegionTag{Expedition}; the timeout must not destroy them — DR-040 BLOCKER 3).
+                        var ecb = new EntityCommandBuffer(Allocator.Temp);
+                        foreach (var (hr, he) in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>().WithEntityAccess())
+                            if (hr.ValueRO.Region == RegionId.Base)
+                                ecb.DestroyEntity(he);
+                        ecb.Playback(state.EntityManager);
+                        ecb.Dispose();
 
                         if (SystemAPI.TryGetSingletonEntity<WaveState>(out var waveEntity))
                         {

Assets/_Project/Scripts/Simulation/Combat/EnemyAIMath.cs

@@ -95,5 +95,36 @@ namespace ProjectM.Simulation
                 if (sq < bestSq) { bestSq = sq; index = i; isStructure = true; }
             }
         }
+
+        /// <summary>
+        /// Region-scoped variant of <see cref="PickWeightedNearest(float3,NativeList{float3},NativeList{float3},float,out bool,out int)"/>:
+        /// considers ONLY targets whose stored region byte equals <paramref name="region"/>, so a Husk seeks within
+        /// its own region only (an expedition Husk never paths across the 1000-unit gap to a base player/structure,
+        /// and a base Husk never to an expedition target). <paramref name="playerRegions"/> /
+        /// <paramref name="structureRegions"/> are parallel to the position lists; the returned <paramref name="index"/>
+        /// maps to the FULL list so the caller's by-index entity lookup stays valid. Pure, Burst-safe (byte compares).
+        /// </summary>
+        public static void PickWeightedNearest(float3 from, NativeList<float3> playerPositions,
+            NativeList<byte> playerRegions, NativeList<float3> structurePositions, NativeList<byte> structureRegions,
+            byte region, float structureWeight, out bool isStructure, out int index)
+        {
+            isStructure = false;
+            index = -1;
+            float bestSq = float.MaxValue;
+            for (int i = 0; i < playerPositions.Length; i++)
+            {
+                if (playerRegions[i] != region) continue;
+                float sq = math.lengthsq(playerPositions[i].xz - from.xz);
+                if (sq < bestSq) { bestSq = sq; index = i; isStructure = false; }
+            }
+            float w = math.max(0f, structureWeight);
+            float wsq = w * w; // applied to SQUARED distance so the weight scales true distance
+            for (int i = 0; i < structurePositions.Length; i++)
+            {
+                if (structureRegions[i] != region) continue;
+                float sq = math.lengthsq(structurePositions[i].xz - from.xz) * wsq;
+                if (sq < bestSq) { bestSq = sq; index = i; isStructure = true; }
+            }
+        }
     }
 }

Assets/_Project/Scripts/Simulation/Combat/ZoneEnemyComponents.cs

@@ -0,0 +1,57 @@
+using Unity.Entities;
+
+namespace ProjectM.Simulation
+{
+    /// <summary>
+    /// Marker on a runtime-spawned EXPEDITION combat enemy (a Husk variant the server's ZoneEnemyDirectorSystem
+    /// instantiates in the expedition region). Distinguishes zone enemies from base-siege Husks for the single
+    /// teardown point in ExpeditionFieldSystem and for the per-epoch clear count. Zone enemies ALSO keep
+    /// <c>EnemyTag</c> + <c>RegionTag{Expedition}</c>, so Slice-1 readability/health-bars/telegraphs/damage and the
+    /// per-region AI target filter all work for them unchanged.
+    /// </summary>
+    public struct ZoneEnemyTag : IComponentData { }
+
+    /// <summary>
+    /// Baked config for the expedition zone-enemy director (one singleton in the gameplay subscene; the server-only
+    /// ZoneEnemyDirectorSystem reads it). One epoch-seeded wave per sortie: a <see cref="GruntsPerWave"/> +
+    /// <see cref="ChargersPerWave"/> baseline that shifts grunt-&gt;charger as the expedition epoch climbs (the
+    /// highest-leverage variety lever), spawned one every <see cref="SpawnIntervalTicks"/> at a deterministic ring of
+    /// <see cref="RingSlots"/> slots / <see cref="RingRadius"/> around the expedition origin, capped at
+    /// <see cref="MaxAlive"/> concurrent (the v1 ghost-relevancy mitigation). On a real clear the returning player
+    /// banks <see cref="RewardOre"/> to the shared ledger, once per epoch.
+    /// </summary>
+    public struct ZoneEnemyDirector : IComponentData
+    {
+        public int MaxAlive;
+        public float RingRadius;
+        public int RingSlots;
+        public int SpawnIntervalTicks;
+        public int GruntsPerWave;
+        public int ChargersPerWave;
+        public int RewardOre;
+    }
+
+    /// <summary>
+    /// Baked pool of zone-enemy prefab variants the director draws from by composition. Index 0 = Grunt variant,
+    /// index 1 = Charger variant (see <see cref="ZoneEnemyMath.IsChargerSlot"/>). Aliases the existing Husk ghost
+    /// prefabs so zone enemies reuse the whole combat/readability stack with no new ghost type.
+    /// </summary>
+    public struct ZoneEnemyPrefab : IBufferElementData
+    {
+        public Entity Prefab;
+    }
+
+    /// <summary>
+    /// Runtime state of the zone-enemy director (server-only singleton; NOT replicated). Tracks its OWN spawn
+    /// counter (never WaveState.SpawnCounter), how many enemies remain to spawn for the current epoch's wave, the
+    /// next spawn tick, and the epoch the current wave was seeded for (re-syncs when CycleRuntime.ExpeditionEpoch
+    /// bumps). All session-scoped: 0-defaults safely on load (no SaveData field — DR-040 defers SaveData v6).
+    /// </summary>
+    public struct ZoneEnemyState : IComponentData
+    {
+        public uint SpawnCounter;
+        public int RemainingToSpawn;
+        public uint NextSpawnTick;
+        public int SeededEpoch;
+    }
+}

Assets/_Project/Scripts/Simulation/Combat/ZoneEnemyComponents.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 0aedc87a4719411418ca5f914af613b8

Assets/_Project/Scripts/Simulation/Combat/ZoneEnemyMath.cs

@@ -0,0 +1,42 @@
+using Unity.Mathematics;
+
+namespace ProjectM.Simulation
+{
+    /// <summary>
+    /// Pure, deterministic composition math for the expedition zone-enemy wave — no RNG state, no wall-clock — so the
+    /// per-epoch wave is reproducible across restarts/saves and EditMode-unit-testable without an ECS world (mirrors
+    /// <see cref="EnemyAIMath"/> / <c>ProductionMath</c>). The highest-leverage Slice-3 variety lever: the encounter
+    /// COMPOSITION shifts grunt-heavy -&gt; charger-heavy as the expedition <c>epoch</c> climbs (grunt count stays
+    /// fixed; the per-epoch growth is all chargers).
+    /// </summary>
+    public static class ZoneEnemyMath
+    {
+        /// <summary>
+        /// Total enemies in this epoch's wave: the baked <paramref name="gruntsPerWave"/> + <paramref name="chargersPerWave"/>
+        /// baseline plus one extra per epoch beyond the first (a gentle ramp). Lower-bounded at 1 so an occupied
+        /// expedition always has a fight. <paramref name="epoch"/> is the monotonic sortie counter (&gt;=1 in practice).
+        /// </summary>
+        public static int WaveSize(int epoch, int gruntsPerWave, int chargersPerWave)
+        {
+            int e = math.max(1, epoch);
+            int baseCount = math.max(0, gruntsPerWave) + math.max(0, chargersPerWave);
+            return math.max(1, baseCount + (e - 1));
+        }
+
+        /// <summary>
+        /// Deterministic grunt/charger pick for spawn <paramref name="slot"/> of this epoch's wave. The charger
+        /// count is <paramref name="chargersPerWave"/> + (epoch - 1), clamped to the wave size, assigned to the LAST
+        /// slots; everything earlier is a Grunt. So the grunt count stays fixed at <paramref name="gruntsPerWave"/>
+        /// and the wave skews charger-heavy as the epoch climbs. Returns true for a Charger slot. Stable per
+        /// (epoch, slot) — a replayed wave is identical. Pure integer math (Burst-safe; no enum, no RNG).
+        /// </summary>
+        public static bool IsChargerSlot(int epoch, int slot, int gruntsPerWave, int chargersPerWave)
+        {
+            int e = math.max(1, epoch);
+            int size = WaveSize(epoch, gruntsPerWave, chargersPerWave);
+            int chargers = math.clamp(math.max(0, chargersPerWave) + (e - 1), 0, size);
+            int s = ((slot % size) + size) % size;
+            return s >= size - chargers;
+        }
+    }
+}

Assets/_Project/Scripts/Simulation/Combat/ZoneEnemyMath.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: bff328839d124da48bd8a43b9d77f543

Assets/_Project/Scripts/Simulation/World/CycleComponents.cs

@@ -76,5 +76,11 @@ namespace ProjectM.Simulation
 
         /// <summary>Previous-tick expedition occupancy (1 = at least one player out), for the empty&lt;-&gt;occupied edge.</summary>
         public byte PrevExpeditionOccupied;
+
+        /// <summary>The <see cref="ExpeditionEpoch"/> a zone-clear Ore reward was last banked for — gates the once-per-epoch reward so two same-tick co-op returners pay once and gate re-entry can't farm (int equality, never tick math).</summary>
+        public int LastRewardedEpoch;
+
+        /// <summary>1 once the current epoch's expedition wave has FULLY spawned and been cleared to zero live zone enemies; reset to 0 on the empty-&gt;occupied epoch bump. The reward fires only on a REAL clear.</summary>
+        public byte ClearedThisEpoch;
     }
 }

Assets/_Project/Subscenes/Gameplay.unity

@@ -2848,54 +2848,6 @@ Transform:
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@@ -3360,6 +3312,60 @@ BoxCollider:
   serializedVersion: 3
   m_Size: {x: 15.610933, y: 5, z: 1.5}
   m_Center: {x: 0, y: 2.5, z: 0}
+--- !u!1 &1957070222
+GameObject:
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+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1957070224}
+  - component: {fileID: 1957070223}
+  m_Layer: 0
+  m_Name: ZoneEnemyDirector
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!114 &1957070223
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+  m_Script: {fileID: 11500000, guid: 5918787bb2ebb7747afe473a7937ed53, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: ProjectM.Authoring::ProjectM.Authoring.ZoneEnemyDirectorAuthoring
+  EnemyPrefabs:
+  - {fileID: 3885353946372160549, guid: a6c2004a3cc32cc44b1bb7a795f86519, type: 3}
+  - {fileID: 3885353946372160549, guid: 0d42b4a8ef76489458ee1ecf51b4dbca, type: 3}
+  MaxAlive: 12
+  RingRadius: 14
+  RingSlots: 10
+  SpawnIntervalTicks: 30
+  GruntsPerWave: 4
+  ChargersPerWave: 1
+  RewardOre: 25
+--- !u!4 &1957070224
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
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+  m_ConstrainProportionsScale: 0
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+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
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@@ -3791,3 +3747,4 @@ SceneRoots:
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+  - {fileID: 1957070224}

Assets/_Project/Tests/EditMode/ChargerTests.cs

@@ -44,6 +44,7 @@ namespace ProjectM.Tests
             em.AddComponentData(e, new Health { Current = 100f, Max = 100f });
             em.AddComponent<PlayerTag>(e);
             em.AddBuffer<DamageEvent>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 
@@ -59,6 +60,7 @@ namespace ProjectM.Tests
             em.AddComponent<IsLunging>(e);
             em.SetComponentEnabled<IsLunging>(e, false); // baked DISABLED on the real Charger (spawns not-lunging)
             em.AddComponent<EnemyTag>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 

Assets/_Project/Tests/EditMode/CyclePhaseSystemTests.cs

@@ -173,8 +173,9 @@ namespace ProjectM.Tests
                 ledger.Add(new StorageEntry { ItemId = 2, Count = 100 });
                 ledger.Add(new StorageEntry { ItemId = 4, Count = 40 });
                 MakeWaveState(em, waveNumber: 6, phase: WavePhase.Spawning, remainingToSpawn: 3);
-                em.CreateEntity(typeof(EnemyTag)); // two live husks the team failed to clear
-                em.CreateEntity(typeof(EnemyTag));
+                // two live BASE husks the team failed to clear (RegionTag defaults to Region 0 = Base)
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
 
                 group.Update();
 
@@ -193,6 +194,38 @@ namespace ProjectM.Tests
             }
         }
 
+        [Test]
+        public void Base_Overrun_Disperses_Base_Husks_But_Spares_Expedition_Husks()
+        {
+            // Slice 3 regression: a BASE Core breach must NOT wipe an in-progress EXPEDITION wave (both share
+            // EnemyTag but live in different regions). A region-blind cull would also spuriously trip the zone
+            // director's aliveZone==0 clear/reward edge on the player's return.
+            var (world, group) = MakeWorld("BaseOverrunSparesExpedition", serverTick: 200);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var cycle = MakeCycle(em, CyclePhase.Siege, defendStartWave: 5);
+                em.AddComponentData(cycle, new GoalProgress { Charge = 3, Target = 10 });
+                em.AddComponentData(cycle, new CoreIntegrity { Current = 0, Max = 100, OverrunTick = 0 }); // breached
+                var ledger = em.AddBuffer<StorageEntry>(cycle);
+                ledger.Add(new StorageEntry { ItemId = 2, Count = 100 });
+                ledger.Add(new StorageEntry { ItemId = 4, Count = 40 });
+                MakeWaveState(em, waveNumber: 6, phase: WavePhase.Spawning, remainingToSpawn: 3);
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag)); // BASE husk (RegionTag defaults to Region 0 = Base)
+                var exp = em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
+                em.SetComponentData(exp, new RegionTag { Region = RegionId.Expedition }); // a husk out on the expedition
+
+                group.Update();
+
+                Assert.IsTrue(em.Exists(exp), "the expedition husk survives a base Core breach.");
+                using var huskQ = em.CreateEntityQuery(typeof(EnemyTag));
+                Assert.AreEqual(1, huskQ.CalculateEntityCount(),
+                    "only the BASE husk is dispersed by the breach; the in-progress expedition wave is untouched.");
+                Assert.AreEqual(RegionId.Expedition, em.GetComponentData<RegionTag>(exp).Region,
+                    "the survivor is the expedition-region husk.");
+            }
+        }
+
         [Test]
         public void Overrun_Resolves_Once_Then_Stays_Calm_Without_Recharging()
         {

Assets/_Project/Tests/EditMode/EndgameWinLoseTests.cs

@@ -184,8 +184,8 @@ namespace ProjectM.Tests
                 ledger.Add(new StorageEntry { ItemId = ResourceId.Ore, Count = 100 });
                 ledger.Add(new StorageEntry { ItemId = ResourceId.Charge, Count = 40 });
                 MakeWave(em, waveNumber: 6, phase: WavePhase.Spawning, remaining: 3);
-                em.CreateEntity(typeof(EnemyTag));
-                em.CreateEntity(typeof(EnemyTag));
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
 
                 group.Update();
 
@@ -216,8 +216,8 @@ namespace ProjectM.Tests
                 ledger.Add(new StorageEntry { ItemId = ResourceId.Ore, Count = 100 });
                 ledger.Add(new StorageEntry { ItemId = ResourceId.Charge, Count = 40 });
                 MakeWave(em, waveNumber: 6, phase: WavePhase.Spawning, remaining: 0);
-                em.CreateEntity(typeof(EnemyTag));
-                em.CreateEntity(typeof(EnemyTag));
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
+                em.CreateEntity(typeof(EnemyTag), typeof(RegionTag));
 
                 group.Update();
 
@@ -275,7 +275,7 @@ namespace ProjectM.Tests
                 var w = em.CreateEntity(typeof(WaveState));
                 em.SetComponentData(w, new WaveState { RemainingToSpawn = 5, Phase = WavePhase.Spawning });
                 for (int i = 0; i < 3; i++)
-                    em.CreateEntity(typeof(EnemyTag));
+                    em.CreateEntity(typeof(EnemyTag), typeof(RegionTag)); // base husks (RegionTag defaults to Base)
 
                 group.Update();
 

Assets/_Project/Tests/EditMode/EnemyAIMathTests.cs

@@ -170,5 +170,65 @@ namespace ProjectM.Tests
             Assert.AreEqual(-1, idx);
         }
 
+        // ---- Region-aware PickWeightedNearest (Slice 3: per-region target filter, DR-040 BLOCKER 1) ----
+
+        [Test]
+        public void PickWeightedNearest_Region_BaseHusk_PicksBasePlayer_IgnoringCloserExpedition()
+        {
+            using var players = new NativeList<float3>(Allocator.Temp);
+            using var pRegions = new NativeList<byte>(Allocator.Temp);
+            using var structs = new NativeList<float3>(Allocator.Temp);
+            using var sRegions = new NativeList<byte>(Allocator.Temp);
+            players.Add(new float3(10, 0, 0)); pRegions.Add(RegionId.Base);       // base player, far
+            players.Add(new float3(3, 0, 0));  pRegions.Add(RegionId.Expedition); // expedition player, closer
+            EnemyAIMath.PickWeightedNearest(float3.zero, players, pRegions, structs, sRegions,
+                RegionId.Base, 0.7f, out bool isStruct, out int idx);
+            Assert.IsFalse(isStruct);
+            Assert.AreEqual(0, idx, "a base Husk targets the base player (idx 0), never the closer expedition player across the gap");
+        }
+
+        [Test]
+        public void PickWeightedNearest_Region_ExpeditionHusk_PicksExpeditionPlayer()
+        {
+            using var players = new NativeList<float3>(Allocator.Temp);
+            using var pRegions = new NativeList<byte>(Allocator.Temp);
+            using var structs = new NativeList<float3>(Allocator.Temp);
+            using var sRegions = new NativeList<byte>(Allocator.Temp);
+            players.Add(new float3(10, 0, 0)); pRegions.Add(RegionId.Base);
+            players.Add(new float3(3, 0, 0));  pRegions.Add(RegionId.Expedition);
+            EnemyAIMath.PickWeightedNearest(float3.zero, players, pRegions, structs, sRegions,
+                RegionId.Expedition, 0.7f, out bool isStruct, out int idx);
+            Assert.IsFalse(isStruct);
+            Assert.AreEqual(1, idx, "an expedition Husk targets the expedition player (idx 1)");
+        }
+
+        [Test]
+        public void PickWeightedNearest_Region_ExpeditionHusk_NoExpeditionTarget_ReturnsMinusOne()
+        {
+            using var players = new NativeList<float3>(Allocator.Temp);
+            using var pRegions = new NativeList<byte>(Allocator.Temp);
+            using var structs = new NativeList<float3>(Allocator.Temp);
+            using var sRegions = new NativeList<byte>(Allocator.Temp);
+            players.Add(new float3(3, 0, 0)); pRegions.Add(RegionId.Base);   // only a base player
+            structs.Add(new float3(5, 0, 0)); sRegions.Add(RegionId.Base);   // only a base structure
+            EnemyAIMath.PickWeightedNearest(float3.zero, players, pRegions, structs, sRegions,
+                RegionId.Expedition, 0.7f, out bool isStruct, out int idx);
+            Assert.AreEqual(-1, idx, "an expedition Husk with only base targets finds nothing in-region -> idles (no Core fallback)");
+        }
+
+        [Test]
+        public void PickWeightedNearest_Region_BaseHusk_StillRazesBaseStructures()
+        {
+            using var players = new NativeList<float3>(Allocator.Temp);
+            using var pRegions = new NativeList<byte>(Allocator.Temp);
+            using var structs = new NativeList<float3>(Allocator.Temp);
+            using var sRegions = new NativeList<byte>(Allocator.Temp);
+            structs.Add(new float3(0, 0, 12)); sRegions.Add(RegionId.Base);
+            EnemyAIMath.PickWeightedNearest(float3.zero, players, pRegions, structs, sRegions,
+                RegionId.Base, 0.7f, out bool isStruct, out int idx);
+            Assert.IsTrue(isStruct, "a base Husk still targets a base structure (the fortress-aggro path is unchanged in-region)");
+            Assert.AreEqual(0, idx);
+        }
+
     }
 }

Assets/_Project/Tests/EditMode/ExpeditionGateRewardTests.cs

@@ -0,0 +1,109 @@
+using NUnit.Framework;
+using ProjectM.Server;
+using ProjectM.Simulation;
+using Unity.Core;
+using Unity.Entities;
+using Unity.Mathematics;
+using Unity.Transforms;
+
+namespace ProjectM.Tests
+{
+    /// <summary>
+    /// Plain-Entities EditMode tests for the once-per-epoch zone-clear reward folded into
+    /// <see cref="ExpeditionGateSystem"/> (DR-040 BLOCKER 4). A returning player banks flat Ore to the shared ledger
+    /// IFF this epoch's expedition wave was actually cleared and not yet rewarded — and never twice for the same
+    /// epoch (the co-op same-tick / gate-re-entry de-dup).
+    /// </summary>
+    public class ExpeditionGateRewardTests
+    {
+        static (World world, SimulationSystemGroup group, Entity cycle) MakeWorld(string name,
+            int epoch, byte clearedThisEpoch, int lastRewardedEpoch)
+        {
+            var world = new World(name);
+            var group = world.GetOrCreateSystemManaged<SimulationSystemGroup>();
+            group.AddSystemToUpdateList(world.GetOrCreateSystem<ExpeditionGateSystem>());
+            group.SortSystems();
+            world.SetTime(new TimeData(elapsedTime: 0f, deltaTime: 1f / 60f));
+            var em = world.EntityManager;
+
+            // CycleDirector-like entity: cycle state/runtime + the shared resource ledger + threat state.
+            var cyc = em.CreateEntity(typeof(CycleState), typeof(CycleRuntime), typeof(ResourceLedger), typeof(ThreatState));
+            em.SetComponentData(cyc, new CycleState { Phase = CyclePhase.Calm });
+            em.SetComponentData(cyc, new CycleRuntime
+            {
+                ExpeditionEpoch = epoch, ClearedThisEpoch = clearedThisEpoch, LastRewardedEpoch = lastRewardedEpoch,
+            });
+            em.AddBuffer<StorageEntry>(cyc);
+
+            // Zone-enemy director singleton (only RewardOre matters to the reward fold).
+            var dir = em.CreateEntity(typeof(ZoneEnemyDirector));
+            em.SetComponentData(dir, new ZoneEnemyDirector { RewardOre = 25 });
+
+            // A gate Expedition->Base sitting at the expedition origin.
+            var gate = em.CreateEntity(typeof(ExpeditionGate), typeof(LocalTransform));
+            em.SetComponentData(gate, new ExpeditionGate
+            {
+                FromRegion = RegionId.Expedition, ToRegion = RegionId.Base, Radius = 3f, ArrivalPos = new float3(0, 1, 0),
+            });
+            em.SetComponentData(gate, LocalTransform.FromPosition(new float3(1000, 1, 0)));
+
+            return (world, group, cyc);
+        }
+
+        static Entity MakeExpeditionPlayerAtGate(EntityManager em)
+        {
+            var e = em.CreateEntity();
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Expedition });
+            em.AddComponentData(e, LocalTransform.FromPosition(new float3(1000, 1, 0)));
+            em.AddComponent<PlayerTag>(e);
+            return e;
+        }
+
+        static int OreInLedger(EntityManager em, Entity cyc)
+        {
+            var buf = em.GetBuffer<StorageEntry>(cyc);
+            for (int i = 0; i < buf.Length; i++)
+                if (buf[i].ItemId == (ushort)ResourceId.Ore) return buf[i].Count;
+            return 0;
+        }
+
+        [Test]
+        public void Cleared_Return_Banks_Ore_Once()
+        {
+            var (world, group, cyc) = MakeWorld("GateRewardOnce", epoch: 1, clearedThisEpoch: 1, lastRewardedEpoch: 0);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var player = MakeExpeditionPlayerAtGate(em);
+
+                group.Update(); // player walks the gate back to base -> reward
+
+                Assert.AreEqual(25, OreInLedger(em, cyc), "a cleared return banks RewardOre to the shared ledger");
+                Assert.AreEqual(1, em.GetComponentData<CycleRuntime>(cyc).LastRewardedEpoch, "the epoch is marked rewarded");
+
+                // Force a second same-epoch return (the player is back in the expedition at the gate).
+                em.SetComponentData(player, new RegionTag { Region = RegionId.Expedition });
+                em.SetComponentData(player, LocalTransform.FromPosition(new float3(1000, 1, 0)));
+
+                group.Update(); // returns again, but the epoch was already rewarded
+
+                Assert.AreEqual(25, OreInLedger(em, cyc), "the same epoch never pays twice (co-op / re-entry de-dup)");
+            }
+        }
+
+        [Test]
+        public void Uncleared_Return_Banks_Nothing()
+        {
+            var (world, group, cyc) = MakeWorld("GateRewardUncleared", epoch: 1, clearedThisEpoch: 0, lastRewardedEpoch: 0);
+            using (world)
+            {
+                var em = world.EntityManager;
+                MakeExpeditionPlayerAtGate(em);
+
+                group.Update();
+
+                Assert.AreEqual(0, OreInLedger(em, cyc), "returning without clearing the wave banks nothing (no farming)");
+            }
+        }
+    }
+}

Assets/_Project/Tests/EditMode/ExpeditionGateRewardTests.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 825422a92eb4b1d4eb4cdafc57884a01

Assets/_Project/Tests/EditMode/KnockbackTests.cs

@@ -83,6 +83,7 @@ namespace ProjectM.Tests
             em.AddComponentData(e, new Health { Current = 100f, Max = 100f });
             em.AddComponent<PlayerTag>(e);
             em.AddBuffer<DamageEvent>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 
@@ -95,6 +96,7 @@ namespace ProjectM.Tests
             em.AddComponentData(e, kb);
             em.AddComponentData(e, new AttackWindup());
             em.AddComponent<EnemyTag>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 

Assets/_Project/Tests/EditMode/TelegraphTests.cs

@@ -44,6 +44,7 @@ namespace ProjectM.Tests
             em.AddComponentData(e, new Health { Current = 100f, Max = 100f });
             em.AddComponent<PlayerTag>(e);
             em.AddBuffer<DamageEvent>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 
@@ -56,6 +57,7 @@ namespace ProjectM.Tests
             em.AddComponentData(e, new KnockbackState());
             em.AddComponentData(e, new AttackWindup());
             em.AddComponent<EnemyTag>(e);
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Base });
             return e;
         }
 

Assets/_Project/Tests/EditMode/ThreatDirectorSystemTests.cs

@@ -138,7 +138,10 @@ namespace ProjectM.Tests
 
                 // Three Husks still on the field with no one to clear them.
                 for (int i = 0; i < 3; i++)
-                    em.CreateEntity(typeof(EnemyTag));
+                {
+                    var h = em.CreateEntity(typeof(EnemyTag));
+                    em.AddComponentData(h, new RegionTag { Region = RegionId.Base });
+                }
 
                 group.Update();
 

Assets/_Project/Tests/EditMode/ZoneEnemyDirectorSystemTests.cs

@@ -0,0 +1,193 @@
+using NUnit.Framework;
+using ProjectM.Server;
+using ProjectM.Simulation;
+using Unity.Collections;
+using Unity.Core;
+using Unity.Entities;
+using Unity.Mathematics;
+using Unity.NetCode;
+using Unity.Transforms;
+
+namespace ProjectM.Tests
+{
+    /// <summary>
+    /// Plain-Entities EditMode tests for the server-only <see cref="ZoneEnemyDirectorSystem"/>. A bare world is
+    /// seeded with NetworkTime, a CycleDirector entity (CycleState + CycleRuntime) and a zone-enemy director
+    /// (ZoneEnemyDirector + ZoneEnemyState + a Prefab-tagged enemy in the ZoneEnemyPrefab buffer). Pins: it spawns
+    /// only while a player is OUT in the expedition AND the base is Calm; tags spawns RegionTag{Expedition} +
+    /// ZoneEnemyTag at the deterministic ring origin (Scale preserved); and marks CycleRuntime.ClearedThisEpoch on a
+    /// real clear.
+    /// </summary>
+    public class ZoneEnemyDirectorSystemTests
+    {
+        static (World world, SimulationSystemGroup group, Entity cycle) MakeWorld(string name, uint serverTick, byte phase, int epoch)
+        {
+            var world = new World(name);
+            var group = world.GetOrCreateSystemManaged<SimulationSystemGroup>();
+            group.AddSystemToUpdateList(world.GetOrCreateSystem<ZoneEnemyDirectorSystem>());
+            group.SortSystems();
+            world.SetTime(new TimeData(elapsedTime: 0f, deltaTime: 1f / 60f));
+            var em = world.EntityManager;
+            var nt = em.CreateEntity(typeof(NetworkTime));
+            em.SetComponentData(nt, new NetworkTime { ServerTick = new NetworkTick(serverTick) });
+            var cyc = em.CreateEntity(typeof(CycleState), typeof(CycleRuntime));
+            em.SetComponentData(cyc, new CycleState { Phase = phase });
+            em.SetComponentData(cyc, new CycleRuntime { ExpeditionEpoch = epoch });
+            return (world, group, cyc);
+        }
+
+        static Entity MakeZonePrefab(EntityManager em)
+        {
+            var e = em.CreateEntity(typeof(LocalTransform), typeof(EnemyTag));
+            em.SetComponentData(e, LocalTransform.Identity); // Scale = 1 so WithPosition keeps it
+            em.AddComponent<Prefab>(e);
+            return e;
+        }
+
+        static Entity MakeDirector(EntityManager em, Entity grunt, Entity charger,
+            int maxAlive, int gruntsPerWave, int chargersPerWave,
+            uint nextSpawnTick, int remainingToSpawn, int seededEpoch, uint spawnCounter)
+        {
+            var e = em.CreateEntity(typeof(ZoneEnemyDirector), typeof(ZoneEnemyState));
+            em.SetComponentData(e, new ZoneEnemyDirector
+            {
+                MaxAlive = maxAlive, RingRadius = 14f, RingSlots = 10, SpawnIntervalTicks = 10,
+                GruntsPerWave = gruntsPerWave, ChargersPerWave = chargersPerWave, RewardOre = 25,
+            });
+            em.SetComponentData(e, new ZoneEnemyState
+            {
+                SpawnCounter = spawnCounter, RemainingToSpawn = remainingToSpawn,
+                NextSpawnTick = nextSpawnTick, SeededEpoch = seededEpoch,
+            });
+            var buf = em.AddBuffer<ZoneEnemyPrefab>(e);
+            buf.Add(new ZoneEnemyPrefab { Prefab = grunt });
+            buf.Add(new ZoneEnemyPrefab { Prefab = charger });
+            return e;
+        }
+
+        static Entity MakeExpeditionPlayer(EntityManager em, float3 pos)
+        {
+            var e = em.CreateEntity();
+            em.AddComponentData(e, new RegionTag { Region = RegionId.Expedition });
+            em.AddComponentData(e, LocalTransform.FromPosition(pos));
+            em.AddComponent<PlayerTag>(e);
+            return e;
+        }
+
+        static int ZoneCount(EntityManager em)
+        {
+            using var q = em.CreateEntityQuery(typeof(ZoneEnemyTag));
+            return q.CalculateEntityCount();
+        }
+
+        [Test]
+        public void Spawns_Expedition_Tagged_Enemy_When_Occupied_And_Calm()
+        {
+            var (world, group, _) = MakeWorld("ZoneSpawn", serverTick: 100, phase: CyclePhase.Calm, epoch: 1);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var grunt = MakeZonePrefab(em);
+                var charger = MakeZonePrefab(em);
+                var dir = MakeDirector(em, grunt, charger, maxAlive: 12, gruntsPerWave: 2, chargersPerWave: 0,
+                    nextSpawnTick: 0, remainingToSpawn: 0, seededEpoch: 0, spawnCounter: 0);
+                MakeExpeditionPlayer(em, new float3(1000, 1, 0));
+
+                group.Update();
+
+                Assert.AreEqual(1, ZoneCount(em), "one zone enemy spawns this tick");
+                using var q = em.CreateEntityQuery(typeof(ZoneEnemyTag), typeof(RegionTag));
+                var arr = q.ToComponentDataArray<RegionTag>(Allocator.Temp);
+                Assert.AreEqual(RegionId.Expedition, arr[0].Region, "the spawn is tagged RegionTag{Expedition}");
+                arr.Dispose();
+
+                var zs = em.GetComponentData<ZoneEnemyState>(dir);
+                Assert.AreEqual(1u, zs.SpawnCounter, "spawn counter advanced");
+                Assert.AreEqual(1, zs.RemainingToSpawn, "wave size 2 seeded, 1 spawned -> 1 remaining");
+            }
+        }
+
+        [Test]
+        public void Spawn_Lands_On_Expedition_Ring_Origin_With_Scale_Preserved()
+        {
+            var (world, group, _) = MakeWorld("ZoneRing", serverTick: 100, phase: CyclePhase.Calm, epoch: 1);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var grunt = MakeZonePrefab(em);
+                var charger = MakeZonePrefab(em);
+                MakeDirector(em, grunt, charger, maxAlive: 12, gruntsPerWave: 2, chargersPerWave: 0,
+                    nextSpawnTick: 0, remainingToSpawn: 0, seededEpoch: 0, spawnCounter: 0);
+                MakeExpeditionPlayer(em, new float3(1000, 1, 0));
+
+                group.Update();
+
+                using var q = em.CreateEntityQuery(typeof(ZoneEnemyTag), typeof(LocalTransform));
+                var arr = q.ToComponentDataArray<LocalTransform>(Allocator.Temp);
+                // origin = base(0,1,0) + (1000,0,0); ring slot 0 of a 10-slot radius-14 ring -> +X.
+                Assert.AreEqual(1014f, arr[0].Position.x, 1e-2f, "deterministic ring slot 0 at the expedition origin (+radius on X)");
+                Assert.AreEqual(1f, arr[0].Scale, 1e-3f, "baked Scale preserved (WithPosition, not FromPosition)");
+                arr.Dispose();
+            }
+        }
+
+        [Test]
+        public void Does_Not_Spawn_When_No_Expedition_Player()
+        {
+            var (world, group, _) = MakeWorld("ZoneEmpty", serverTick: 100, phase: CyclePhase.Calm, epoch: 1);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var grunt = MakeZonePrefab(em);
+                var charger = MakeZonePrefab(em);
+                MakeDirector(em, grunt, charger, maxAlive: 12, gruntsPerWave: 2, chargersPerWave: 0,
+                    nextSpawnTick: 0, remainingToSpawn: 0, seededEpoch: 0, spawnCounter: 0);
+                // no expedition player out there
+
+                group.Update();
+
+                Assert.AreEqual(0, ZoneCount(em), "nobody out in the expedition -> nothing spawns");
+            }
+        }
+
+        [Test]
+        public void Does_Not_Spawn_During_Base_Siege()
+        {
+            var (world, group, _) = MakeWorld("ZoneSiege", serverTick: 100, phase: CyclePhase.Siege, epoch: 1);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var grunt = MakeZonePrefab(em);
+                var charger = MakeZonePrefab(em);
+                MakeDirector(em, grunt, charger, maxAlive: 12, gruntsPerWave: 2, chargersPerWave: 0,
+                    nextSpawnTick: 0, remainingToSpawn: 0, seededEpoch: 0, spawnCounter: 0);
+                MakeExpeditionPlayer(em, new float3(1000, 1, 0));
+
+                group.Update();
+
+                Assert.AreEqual(0, ZoneCount(em), "the expedition wave pauses while the base is under siege (Calm-only spawning)");
+            }
+        }
+
+        [Test]
+        public void Cleared_Wave_Marks_ClearedThisEpoch()
+        {
+            var (world, group, cyc) = MakeWorld("ZoneCleared", serverTick: 100, phase: CyclePhase.Calm, epoch: 1);
+            using (world)
+            {
+                var em = world.EntityManager;
+                var grunt = MakeZonePrefab(em);
+                var charger = MakeZonePrefab(em);
+                // already seeded this epoch + fully spawned (RemainingToSpawn 0) + no live zone enemies.
+                MakeDirector(em, grunt, charger, maxAlive: 12, gruntsPerWave: 2, chargersPerWave: 0,
+                    nextSpawnTick: 0, remainingToSpawn: 0, seededEpoch: 1, spawnCounter: 2);
+                MakeExpeditionPlayer(em, new float3(1000, 1, 0));
+
+                group.Update();
+
+                Assert.AreEqual((byte)1, em.GetComponentData<CycleRuntime>(cyc).ClearedThisEpoch,
+                    "wave fully spawned + no live zone enemies -> a real clear is marked");
+            }
+        }
+    }
+}

Assets/_Project/Tests/EditMode/ZoneEnemyDirectorSystemTests.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: f307978f01b668b42ba10eea2029091b

Assets/_Project/Tests/EditMode/ZoneEnemyMathTests.cs

@@ -0,0 +1,60 @@
+using NUnit.Framework;
+using ProjectM.Simulation;
+
+namespace ProjectM.Tests
+{
+    /// <summary>
+    /// Pure-function tests for <see cref="ZoneEnemyMath"/> (no ECS world): the deterministic, save-reproducible
+    /// expedition-wave composition. Pins the lower bound, the per-epoch ramp, and the grunt-heavy -> charger-heavy
+    /// shift (grunt count held fixed; the per-epoch growth is all chargers).
+    /// </summary>
+    public class ZoneEnemyMathTests
+    {
+        [Test]
+        public void WaveSize_LowerBoundedAtOne()
+        {
+            Assert.AreEqual(1, ZoneEnemyMath.WaveSize(0, 0, 0), "an occupied expedition always has at least one enemy");
+            Assert.AreEqual(1, ZoneEnemyMath.WaveSize(-5, 0, 0), "epoch is floored at 1 internally");
+        }
+
+        [Test]
+        public void WaveSize_BaselinePlusOnePerEpoch()
+        {
+            Assert.AreEqual(5, ZoneEnemyMath.WaveSize(1, 4, 1), "epoch 1: 4 grunts + 1 charger");
+            Assert.AreEqual(7, ZoneEnemyMath.WaveSize(3, 4, 1), "epoch 3: baseline 5 + (3-1) ramp");
+        }
+
+        [Test]
+        public void IsChargerSlot_Epoch1_GruntsFirst_OneChargerLast()
+        {
+            // epoch 1, G=4 C=1 -> size 5, only the last slot is a charger.
+            Assert.IsFalse(ZoneEnemyMath.IsChargerSlot(1, 0, 4, 1));
+            Assert.IsFalse(ZoneEnemyMath.IsChargerSlot(1, 3, 4, 1));
+            Assert.IsTrue(ZoneEnemyMath.IsChargerSlot(1, 4, 4, 1));
+        }
+
+        [Test]
+        public void Composition_GruntCountFixed_ChargerShareGrowsWithEpoch()
+        {
+            AssertComposition(epoch: 1, grunts: 4, chargers: 1, expectGrunts: 4, expectChargers: 1);
+            AssertComposition(epoch: 5, grunts: 4, chargers: 1, expectGrunts: 4, expectChargers: 5);
+        }
+
+        static void AssertComposition(int epoch, int grunts, int chargers, int expectGrunts, int expectChargers)
+        {
+            int size = ZoneEnemyMath.WaveSize(epoch, grunts, chargers);
+            int g = 0, c = 0;
+            for (int slot = 0; slot < size; slot++)
+                if (ZoneEnemyMath.IsChargerSlot(epoch, slot, grunts, chargers)) c++; else g++;
+            Assert.AreEqual(expectGrunts, g, $"grunt count at epoch {epoch}");
+            Assert.AreEqual(expectChargers, c, $"charger count at epoch {epoch}");
+        }
+
+        [Test]
+        public void IsChargerSlot_Deterministic()
+        {
+            for (int slot = 0; slot < 9; slot++)
+                Assert.AreEqual(ZoneEnemyMath.IsChargerSlot(5, slot, 4, 1), ZoneEnemyMath.IsChargerSlot(5, slot, 4, 1));
+        }
+    }
+}

Assets/_Project/Tests/EditMode/ZoneEnemyMathTests.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: e61ab20e496e331449ba6e26440ad000

CLAUDE.md

@@ -9,7 +9,7 @@ Multiplayer game on **Unity DOTS (Entities) + Netcode for Entities** — server-
 - **Size check** — bash: `wc -c CLAUDE.md` · PowerShell: `(Get-Item CLAUDE.md).Length`. Must be `< 40960`.
 - **Archive, don't delete.** When trimming, append the verbose / least-hot detail to the obsidian reference note `Docs/Vault/_Meta/CLAUDE_Build_Gotchas_Archive.md` under a **new dated heading** (never overwrite an older snapshot), and leave a one-line pointer + the relevant `[[DR-###]]` link here. Design rationale already lives in the per-milestone DRs (`Docs/Vault/07_Sessions/_Decisions/DR-###`).
 - **Net-zero rule:** every addition is paid for by a condensation elsewhere. Keep only the hottest, highest-recurrence operational rules inline (flag them **★**); depth lives in the archive + DRs.
-- Condensation history: 2026-06-04 · 06-07 · 06-08 · 06-13 (M1–END-2 long-form → archive); 06-17 (6.5 stack swap).
+- Condensation history: 06-04 → 06-17 (M1–END-2 long-form + 6.5 stack swap → archive).
 
 ## Stack — Unity 6.5.0 (`6000.5.0f1`, stable) as of 2026-06-17
 
@@ -73,8 +73,8 @@ Long-form originals + the milestone each came from: `Docs/Vault/_Meta/CLAUDE_Bui
 - **A dev/debug `IRpcCommand` wire TYPE must be UNCONDITIONAL (no `#if`)** — the reflection-built RpcCollection hash must match across release/dev peers or the handshake refuses; `#if UNITY_EDITOR`-gate only the send/receive SYSTEMS, never the request struct. **Re-mean bytes, don't rename**: unchanged byte VALUES keep the `[GhostField]` serializer identical → re-bake-free (only authoring *default-value* edits re-bake the subscene).
 - **Derive enableable gates instead of replicating them.** e.g. player `Dead` = a LOCAL enableable derived every predicted tick from replicated `Health<=0` (rollback-correct, no `[GhostEnabledBit]`). To write the bit on a disabled entity the query must visit it (`.WithPresent<Dead>()`); **bake the enableable DISABLED** so instances spawn off. Respawn/death *timing* is server-only.
 - **Cooldown/spawn "next tick" sentinels:** route every stored tick through **`TickUtil.NonZero(...)`** (a computed `ServerTick+delay` can wrap to 0, the "ready" sentinel) and compare with `NetworkTick.IsNewerThan` / `.TicksSince`, **never** raw `uint <` / subtraction.
-- **`GhostRelevancy` for region splits:** use `GhostRelevancyMode.SetIsIrrelevant` (not `SetIsRelevant`) so untagged/global ghosts stay relevant for free — only enumerate cross-region ghosts to hide. `RegionTag{byte Region}` is **server-only, NOT a `[GhostField]`**. `RelevantGhostForConnection{int Connection (=NetworkId.Value); int Ghost (=GhostInstance.ghostId)}`. See [[DR-013_M6_Aether_Cycle_Region_Split]].
-- **Shared GLOBAL state (cycle phase, resource ledger, goal meter) rides an UNTAGGED ghost**, never a region-tagged one (`SetIsIrrelevant` would hide it cross-region). Resolve a ledger buffer via a DISTINCT tag (`ResourceLedger`), **never `GetSingleton<StorageEntry>`** when a second `StorageEntry` buffer exists elsewhere → "multiple instances" throw.
+- **`GhostRelevancy` for region splits:** use `GhostRelevancyMode.SetIsIrrelevant` (not `SetIsRelevant`) so untagged/global ghosts stay relevant for free — only enumerate cross-region ghosts to hide. `RegionTag{byte Region}` is **server-only, NOT a `[GhostField]`**. **★ A 2nd region sharing an EXISTING tag (`EnemyTag`) → re-audit every query/cull over it: once-safe global despawns/cleared-checks then wipe or block cross-region (DR-031, DR-040).** `RelevantGhostForConnection` = `{int Connection=NetworkId.Value; int Ghost=ghostId}`. See [[DR-013_M6_Aether_Cycle_Region_Split]].
+- **Shared GLOBAL state (cycle phase, resource ledger, goal meter) rides an UNTAGGED ghost**, never a region-tagged one (`SetIsIrrelevant` would hide it cross-region). Resolve the ledger via its DISTINCT `ResourceLedger` tag (the multi-`StorageEntry` "multiple instances" rule — EB-2 line).
 - **Frontend world lifecycle (menu → on-demand worlds) ★:** `CreateLocalWorld` is `internal` in 1.13.2 — use public `CreateClientWorld`/`CreateServerWorld` (they register the `ServerWorld`/`ClientWorld` statics the UI reads); menu world via `DefaultWorldInitialization.Initialize(name, false)`. **Never dispose/create worlds inside an ECS system** — do it on a frame-boundary coroutine (`SessionRunner`, `DontDestroyOnLoad`). The gameplay subscene streams in ONLY if a netcode world is the `DefaultGameObjectInjectionWorld` at `LoadScene` time. See [[DR-019_Frontend_Menu_Settings_Saves_Build]].
 
 ### Physics & character controller

Docs/Vault/07_Sessions/2026/2026-06-21_Slice3_Expedition_Combat_Spine_Build.md

@@ -0,0 +1,49 @@
+---
+date: 2026-06-21
+type: session
+tags:
+- session
+- combat
+- expedition
+- netcode
+- procgen
+- slice
+- slice-3
+permalink: gamevault/07-sessions/2026/2026-06-21-slice3-expedition-combat-spine-build
+---
+
+# Slice 3 — Expedition Combat Spine (build)
+
+> Built the v1 loop locked in [[DR-040_Slice3_Expedition_Combat_Spine]] — the third build slice of the co-op-roguelite redirect ([[DR-037_Procedural_Expedition_Spine_Two_Classes_Persistent_Meta]]), the heaviest netcode slice. Full [[dots-dev]] Feature track, two-review sandwich. Reuses the region split ([[DR-013_M6_Aether_Cycle_Region_Split]]), the base-local core loop ([[DR-031_Base_Mining_Loop_Cohesion]]), epoch-seeded chassis, ring math, and the threat retaliation ([[DR-017_Persistent_Base_Player_Driven_Pacing]]).
+
+## The loop that shipped
+Walk to the Expedition gate → the dormant Expedition region (`base+(1000,0,0)`) drip-spawns an **epoch-seeded enemy wave** in `Calm` → fight & clear it → return to base → a **flat Ore reward** (once per epoch) → the existing `PendingReturns` retaliation arms an **escalated base siege**. Variety comes from epoch-seeded **composition** (grunt-heavy → charger-heavy as the epoch climbs), not arena layout — the highest-leverage lever per the pre-build research.
+
+## What shipped
+- **New sim types** (`ProjectM.Simulation`): `ZoneEnemyTag` (marker); `ZoneEnemyDirector{int MaxAlive; float RingRadius; int RingSlots; int SpawnIntervalTicks; int GruntsPerWave; int ChargersPerWave; int RewardOre}` baked singleton + `ZoneEnemyPrefab` buffer (aliases the existing werewolf/charger prefabs); `ZoneEnemyState{uint SpawnCounter; int RemainingToSpawn; uint NextSpawnTick; int SeededEpoch}` (server-only, its OWN counter — never `WaveState`'s). `ZoneEnemyMath` (pure: `WaveSize` / `IsChargerSlot`, grunt count fixed, chargers grow with epoch, assigned to the LAST slots).
+- **`ZoneEnemyDirectorSystem`** (server, `[BurstCompile]`): runs only while a player is out (a `PlayerTag` whose `RegionTag.Region==Expedition`) and the base is `Calm`; (re)seeds the wave per epoch; spawns one-per-cadence under the `MaxAlive` cap at a deterministic ring via `ecb.Instantiate` + `baked.WithPosition` (preserves the `[GhostField]` Scale) + `AddComponent RegionTag{Expedition}`+`ZoneEnemyTag`; marks `CycleRuntime.ClearedThisEpoch=1` on a real clear.
+- **`EnemyAISystem` region filter** (BLOCKER 1): player + structure snapshots gained parallel `NativeList<byte>` regions; both seek loops gained `RefRO<RegionTag>` + a region-aware `EnemyAIMath.PickWeightedNearest` overload; an expedition husk gets no base structures and no Core fallback (idles if its arena is empty). Burst-safe byte compares.
+- **Base-only cleared-checks** (BLOCKER 3): `WaveSystem`, `ThreatDirectorSystem` SiegeTimeout cull, and `CyclePhaseSystem.DefendCleared` all count/cull `RegionTag{Base}` husks only.
+- **Reward de-dup** (BLOCKER 4): `CycleRuntime` gained `LastRewardedEpoch` (int) + `ClearedThisEpoch` (byte); `ExpeditionGateSystem` deposits `RewardOre` to the shared `ResourceLedger` once per epoch, only after a real clear.
+- **Teardown** (`ExpeditionFieldSystem`): epoch bump also resets `ClearedThisEpoch`; destroy-loop now also culls `ZoneEnemyTag`; added the defensive `RegionTag{Expedition}` guard to the `BlightClutter` loop.
+- **Subscene:** wired a `ZoneEnemyDirector` GameObject (authoring + roster = werewolf + charger) into `Gameplay.unity`, re-baked.
+
+## Deviations from the locked plan (all deliberate)
+- System named **`ZoneEnemyDirectorSystem`** (plan: `ZoneEnemySpawnSystem`).
+- **Ordering = `[UpdateAfter(ExpeditionFieldSystem)]` ONLY.** The plan also sketched `[UpdateBefore(CyclePhaseSystem)]`, but ExpeditionFieldSystem is already `UpdateAfter(CyclePhaseSystem)`, so that would close a `CyclePhase→Field→Zone→CyclePhase` **sort cycle** — which throws at Play world-creation and is **invisible to plain-Entities EditMode** (a recurring trap). Caught at grounding; confirmed clean by the Play smoke.
+- `ZoneEnemyState.SeededEpoch` is `int` (matches `int ExpeditionEpoch`).
+
+## The post-impl review earned its keep again
+The re-run review (`wf_7b45e3c0-b81`, 3 lenses + synth; the first attempt had died on a session-quota limit — empty findings that *look* like a clean pass, [[workflow-agent-quota-failures-look-clean]]) surfaced **1 HIGH**:
+
+**A region-blind Core-breach cull — a THIRD cull path beyond BLOCKER 3's two.** `CyclePhaseSystem`'s overrun/soft-loss branch despawned **all** `EnemyTag` entities. Pre-slice that was safe (every enemy was base-region) — but Slice 3 makes expedition enemies share `EnemyTag`, so a **base** Core breach wiped a live **expedition** wave AND spuriously satisfied the zone director's `aliveZone==0` clear/reward edge (a free Ore reward on return). I had *rationalised* leaving this cull global during implementation ("a Core overrun is terminal"). Fixed to a Base-only filter matching the BLOCKER-3 siblings; removed the now-dead `m_AliveHusks` field; locked with regression test `CyclePhaseSystemTests.Base_Overrun_Disperses_Base_Husks_But_Spares_Expedition_Husks`. Same class of bug the post-impl review caught in [[DR-031_Base_Mining_Loop_Cohesion]] — [[post-impl-review-catches-simplification-regressions]] holds twice now.
+
+## Verification
+- **L1:** console clean (0 ProjectM errors/warnings).
+- **L2:** **368/368 EditMode** (`ProjectM.Tests.EditMode`) — region-filter target correctness (+4), `ZoneEnemyMath` composition (6), `ZoneEnemyDirectorSystem` world tests (5), reward de-dup (2), the breach regression (1), + the pre-existing fixtures patched with `RegionTag{Base}`.
+- **Play smoke:** ServerWorld/ClientWorld boot with **no sort-cycle, no Burst ICE**; the subscene re-baked the singleton (MaxAlive 12 / Ring 14×10 / interval 30 / 4 grunts +1 charger / 25 Ore) + the 2-prefab roster; replicating the director's real spawn sequence tags each enemy `RegionTag{Expedition}`+`ZoneEnemyTag` with no Add-throw and **baked Scale preserved** (0.8 werewolf via `WithPosition`); zero runtime errors; clean cleanup.
+
+## Open / next
+- **Fun-gate (operator):** a hands-on playtest of the full walk-gate→fight→return→reward→siege loop — the logic is unit-covered, the *feel* is not.
+- **Operator fork still open:** OPTIONAL-vs-REQUIRED sortie (default OPTIONAL).
+- **Deferred to v2 (logged in DR-040):** arena-layout pool; zone-theme/depth byte + pre-gate HUD; the felt-beat replicated reward + `TimedModifier` buff; SaveData v6; mini-boss; RegionRelevancy incremental caching.

Docs/Vault/07_Sessions/_Decisions/DR-040_Slice3_Expedition_Combat_Spine.md

@@ -1,7 +1,7 @@
 ---
 id: DR-040
-title: Slice 3 — Expedition Combat Spine (v1 plan, reviewed + locked)
-status: accepted
+title: Slice 3 — Expedition Combat Spine (v1 plan, reviewed + locked → built)
+status: built
 date: 2026-06-18
 tags:
 - decision
@@ -52,4 +52,18 @@ Netcode: **PROCEED WITH BLOCKERS RESOLVED** (the chassis is sound + heavily reus
 - **EditMode tests (planned):** region-filter target correctness; deterministic epoch scatter (same epoch → identical spawns); WaveSystem cleared-check ignores expedition enemies; zone-clear reward deposits once per epoch. **Play-validation:** zone enemies spawn `RegionTag{Expedition}` (visible to expedition player, NOT a base-only connection); kill them, return, retaliation siege arms; expedition player gets no base-Husk aggro; server==client; relevancy cost sane.
 - **Deferred to v2 (logged):** arena-layout pool + authoring; zone-theme/depth byte + pre-gate HUD ("DEPTH 5 — BOSS"); the felt-beat replicated reward + `TimedModifier` buff; SaveData v6 (persist epoch); mini-boss; layout×encounter decoupling; sequential zones; RegionRelevancy incremental caching.
 - **Open (operator):** the OPTIONAL-vs-REQUIRED sortie fork (default OPTIONAL); the Slice 3 fun-gate; the still-open Slice 1 + 2 fun-gates.
-- **Status:** reviewed + locked, **NOT built** — the build is the immediate next unit (start with the new components + the three surgical server-count fixes, then the `EnemyAISystem` region-filter (the riskiest, test it), then `ZoneEnemySpawnSystem` + authoring + the reward, then tests + Play-validate, then commit). Full review (verdicts/blockers/forks/sources) in the run transcript `wf_b8033e26-1f5`.
+- **Status:** **BUILT + verified 2026-06-21** (see build record below). Full pre-build review (verdicts/blockers/forks/sources) in the run transcript `wf_b8033e26-1f5`.
+
+## Build record (2026-06-21)
+
+Built per the locked plan; all four blockers landed. **368/368 EditMode green + a clean netcode Play smoke** (ServerWorld/ClientWorld boot with no sort-cycle, the subscene re-baked the `ZoneEnemyDirector` singleton + 2-prefab roster, real prefabs instantiate `RegionTag{Expedition}`+`ZoneEnemyTag` with baked Scale preserved, zero runtime errors).
+
+**Deviations from the locked text (all deliberate, caught at grounding):**
+- **System renamed `ZoneEnemyDirectorSystem`** (was `ZoneEnemySpawnSystem` in the plan).
+- **Ordering is `[UpdateAfter(ExpeditionFieldSystem)]` ONLY** — the plan's extra `[UpdateBefore(CyclePhaseSystem)]` would close a `CyclePhase→Field→Zone→CyclePhase` sort cycle that throws at Play world-creation and is invisible to EditMode (ExpeditionFieldSystem is itself `UpdateAfter(CyclePhaseSystem)`). Grounding catch.
+- `ZoneEnemyState.SeededEpoch` is **`int`** (not `uint`) to match `int CycleRuntime.ExpeditionEpoch`; `CycleRuntime` gained **both** `LastRewardedEpoch` (int) **and** `ClearedThisEpoch` (byte) — the director sets `ClearedThisEpoch=1` on a real clear, the gate pays `RewardOre` once per epoch on return.
+
+**Post-impl adversarial review (run `wf_7b45e3c0-b81`, 3 lenses + synth) — 1 HIGH found + fixed:**
+- **Region-blind Core-breach cull (a THIRD cull path beyond BLOCKER 3's two).** `CyclePhaseSystem`'s overrun/soft-loss branch despawned **all** `EnemyTag` entities — pre-slice that was safe (all enemies were base), but Slice 3 makes expedition enemies share `EnemyTag`, so a **base** Core breach wiped a live **expedition** wave AND spuriously tripped the zone director's `aliveZone==0` clear/reward edge. **Fix:** Base-only region filter matching the BLOCKER-3 siblings (`ThreatDirectorSystem` timeout + `DefendCleared`); dead `m_AliveHusks` field removed. Locked with regression test `CyclePhaseSystemTests.Base_Overrun_Disperses_Base_Husks_But_Spares_Expedition_Husks`. (Lesson: a cull/query that was region-safe before a region split must be re-audited the moment a second region shares its tag — same class the post-impl review caught in DR-031.)
+
+**Still open (operator):** the OPTIONAL-vs-REQUIRED sortie fork (default OPTIONAL); the Slice 3 fun-gate (needs a hands-on playtest of the full walk-gate→fight→return→reward→siege loop — logic is unit-covered, feel is not).