Preserve native chat during terrain takeover with fallback for missing chat

addons/core/Prefabs/ERR/TerrainTakeover.et

@@ -16,9 +16,5 @@ ERR_TerrainTakeoverMode : "{978E045E53EF36C8}Prefabs/ERR/GameMode.et" {
   SCR_LoadoutManager Loadouts : "{97EF4C1A41F63DDB}Prefabs/MP/Managers/Loadouts/LoadoutManager_USxUSSR.et" {
    ID "588AD55F7655278B"
   }
-  ScriptedChatEntity Chat : "{F69BC912AC8236F9}Prefabs/MP/ScriptedChatEntity.et" {
-   ID "85ED17B0836DB4A2"
-   components { RplComponent "{CA456708D69D73BA}" { Streamable Disabled } }
-  }
  }
 }

addons/core/Prefabs/ERR/TerrainTakeoverWithChat.et

@@ -0,0 +1,9 @@
+ERR_TerrainTakeoverMode : "{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et" {
+ ID "CE902374A658BDF1"
+ {
+  ScriptedChatEntity Chat : "{F69BC912AC8236F9}Prefabs/MP/ScriptedChatEntity.et" {
+   ID "85ED17B0836DB4A2"
+   components { RplComponent "{CA456708D69D73BA}" { Streamable Disabled } }
+  }
+ }
+}

addons/core/Prefabs/ERR/TerrainTakeoverWithChat.et.meta

@@ -0,0 +1,4 @@
+MetaFileClass {
+ Name "{DA8E364BC095712F}Prefabs/ERR/TerrainTakeoverWithChat.et"
+ Configurations { ResourceClass PC {} ResourceClass HEADLESS : PC {} }
+}

addons/core/Scripts/Game/ERR/00_Core/ERR_TerrainTakeover.c

@@ -11,6 +11,11 @@ enum ERR_TerrainTakeoverStage
 
 class ERR_TerrainTakeoverRules
 {
+ static ResourceName Bootstrap(bool hasNativeChat)
+ {
+  if (hasNativeChat) return "{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et";
+  return "{DA8E364BC095712F}Prefabs/ERR/TerrainTakeoverWithChat.et";
+ }
  static bool TimedOut(float elapsed) { return elapsed >= 10; }
  static bool MayDrain(float elapsed, bool sameMode) { return elapsed >= 0.5 && sameMode; }
  static bool MayCreate(float elapsed, bool empty) { return empty && !TimedOut(elapsed); }
@@ -68,6 +73,7 @@ modded class ArmaReforgerScripted
  protected ERR_TerrainTakeoverStage m_ERRTerrainStage;
   protected float m_ERRTerrainElapsed;
  protected RadioManagerEntity m_ERRTerrainRadio;
+ protected BaseChatEntity m_ERRTerrainChat;
  protected EntityID m_ERRTerrainOldLoadoutId;
  protected BaseWorld m_ERRTerrainWorld;
  protected SCR_BaseGameMode m_ERRTerrainOriginal;
@@ -110,6 +116,7 @@ modded class ArmaReforgerScripted
   m_ERRTerrainStage = ERR_TerrainTakeoverStage.INACTIVE;
   m_ERRTerrainElapsed = 0;
   m_ERRTerrainRadio = null;
+  m_ERRTerrainChat = null;
   m_ERRTerrainOldLoadoutId = EntityID.INVALID;
   m_ERRTerrainWorld = null;
   m_ERRTerrainOriginal = null;
@@ -130,7 +137,7 @@ modded class ArmaReforgerScripted
    ERR_FailTerrainTakeover("Select a plain scenario with SCR_BaseGameMode and a Soldiers navmesh; original scenario retained.");
    return false;
   }
-  Resource prefab = Resource.Load("{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et");
+  Resource prefab = Resource.Load(ERR_TerrainTakeoverRules.Bootstrap(GetChat() != null));
   if (!prefab || !prefab.IsValid())
   {
    ERR_FailTerrainTakeover("Escape bootstrap prefab is missing; original scenario retained.");
@@ -210,8 +217,13 @@ modded class ArmaReforgerScripted
  {
   SCR_EditorManagerCore editorCore = SCR_EditorManagerCore.Cast(SCR_EditorManagerCore.GetInstance(SCR_EditorManagerCore));
   if (editorCore) editorCore.ERR_SetTerrainModeEvents(m_ERRTerrainOriginal, false);
-  array<IEntity> managers = {m_ERRTerrainOriginal, GetLoadoutManager(), GetFactionManager(), GetPerceptionManager(), GetChat()};
+  array<IEntity> managers = {m_ERRTerrainOriginal, GetLoadoutManager(), GetFactionManager(), GetPerceptionManager()};
   ERR_TerrainTakeoverReplication.CollectDelegates(SCR_DelegateFactionManagerComponent.GetInstance(), managers);
+  // Native chat unregister can clear a newer registration after replication
+  // delivers the replacement. Keep the terrain's chat on both peers instead.
+  m_ERRTerrainChat = GetChat();
+  if (m_ERRTerrainChat && !ERR_TerrainTakeoverReplication.RetainManager(m_ERRTerrainChat, managers))
+  { ERR_FailTerrainTakeover("Could not retain the native chat service; original scenario retained."); return; }
   ChimeraWorld chimera = ChimeraWorld.CastFrom(GetWorld());
   if (chimera) m_ERRTerrainRadio = chimera.GetRadioManager();
   // Native radio teardown clears the world pointer even after a replacement
@@ -230,7 +242,7 @@ modded class ArmaReforgerScripted
     ancestor = ancestor.GetParent();
    }
   }
-  Print("Reintroduced [terrain takeover]: stopping original scenario; preserving radio manager");
+  Print("Reintroduced [terrain takeover]: stopping original scenario; preserving radio and chat managers");
   m_ERRTerrainOriginal.OnGameEnd();
   if (m_DataCollectorComponent && m_DataCollectorComponent.GetOwner() == m_ERRTerrainOriginal) m_DataCollectorComponent = null;
   SCR_EntityCatalogManagerComponent.ERR_ReleaseTerrainCatalog(m_ERRTerrainOriginal);
@@ -258,7 +270,7 @@ modded class ArmaReforgerScripted
  protected bool ERR_TerrainRegistrationsEmpty()
  {
   ChimeraWorld chimera = ChimeraWorld.CastFrom(GetWorld());
-  return !GetGameMode() && !GetLoadoutManager() && !GetFactionManager() && !GetPerceptionManager() && !GetChat() && (!chimera || chimera.GetRadioManager() == m_ERRTerrainRadio) && !SCR_EntityCatalogManagerComponent.GetInstance() && !m_DataCollectorComponent;
+  return !GetGameMode() && !GetLoadoutManager() && !GetFactionManager() && !GetPerceptionManager() && GetChat() == m_ERRTerrainChat && (!chimera || chimera.GetRadioManager() == m_ERRTerrainRadio) && !SCR_EntityCatalogManagerComponent.GetInstance() && !m_DataCollectorComponent;
  }
  protected void ERR_CreateTerrainMode()
  {
@@ -277,9 +289,9 @@ modded class ArmaReforgerScripted
    if (!marker) { ERR_FailTerrainTakeover("Could not create configured airport marker; restart the scenario."); return; }
    marker.SetName("ERR_Airfield_" + m_ERRTerrainMarkerSlots[i].ToString());
   }
-  ERR_GameMode mode = ERR_GameMode.Cast(SpawnEntityPrefab(Resource.Load("{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et"), GetWorld()));
+  ERR_GameMode mode = ERR_GameMode.Cast(SpawnEntityPrefab(Resource.Load(ERR_TerrainTakeoverRules.Bootstrap(m_ERRTerrainChat != null)), GetWorld()));
   if (!mode || GetGameMode() != mode) { ERR_FailTerrainTakeover("Escape game mode could not register; restart the scenario."); return; }
-  if (!ERR_TerrainTakeoverReplication.Link(mode)) { ERR_FailTerrainTakeover("Escape replication hierarchy could not register; restart the scenario."); return; }
+  if (!ERR_TerrainTakeoverReplication.Link(mode, !m_ERRTerrainChat)) { ERR_FailTerrainTakeover("Escape replication hierarchy could not register; restart the scenario."); return; }
   SCR_EditorManagerCore editorCore = SCR_EditorManagerCore.Cast(SCR_EditorManagerCore.GetInstance(SCR_EditorManagerCore));
   if (editorCore) editorCore.ERR_SetTerrainModeEvents(mode, true);
   m_ERRTerrainStage = ERR_TerrainTakeoverStage.RUNNING;

addons/core/Scripts/Game/ERR/00_Core/ERR_TerrainTakeoverClient.c

@@ -57,7 +57,6 @@ modded class ArmaReforgerScripted
   m_ERRClientOldManagers.Insert(GetLoadoutManager());
   m_ERRClientOldManagers.Insert(GetFactionManager());
   m_ERRClientOldManagers.Insert(GetPerceptionManager());
-  m_ERRClientOldManagers.Insert(GetChat());
  }
  override void UnregisterLoadoutManager(SCR_LoadoutManager instance)
  {
@@ -89,6 +88,13 @@ modded class ArmaReforgerScripted
  void ERR_BeginClientTerrainTakeover(ERR_TerrainTakeoverMode incoming)
  {
   if (m_ERRClientOldManagers.IsEmpty()) return;
+  // Match authority retention before deleting any original parent. No second
+  // chat entity is created when the terrain already supplies one.
+  if (GetChat() && !ERR_TerrainTakeoverReplication.RetainManager(GetChat(), m_ERRClientOldManagers))
+  {
+   Print("Reintroduced [terrain client]: could not retain native chat; original managers retained", LogLevel.ERROR);
+   return;
+  }
   m_ERRClientTerrainTakeover = true;
   SCR_BaseGameMode mode = SCR_BaseGameMode.Cast(m_ERRClientOldManagers[0]);
   PrintFormat("Reintroduced [terrain client]: drain retained mode=%1 incoming=%2", mode, incoming);

addons/core/Scripts/Game/ERR/00_Core/ERR_TerrainTakeoverManagers.c

@@ -256,6 +256,25 @@ class ERR_TerrainTakeoverReplication
    if (delegate && delegate.GetOwner() && !entities.Contains(delegate.GetOwner())) entities.Insert(delegate.GetOwner());
   }
  }
+ // Shared world services must survive removal of an old game-mode hierarchy.
+ static bool RetainManager(IEntity entity, array<IEntity> removed)
+ {
+  if (!entity || !removed || removed.Contains(entity)) return false;
+  IEntity ancestor = entity.GetParent();
+  while (ancestor)
+  {
+   if (removed.Contains(ancestor))
+   {
+    entity.GetParent().RemoveChild(entity, true);
+    if (entity.GetParent()) return false;
+    RplComponent rpl = SCR_EntityHelper.GetEntityRplComponent(entity);
+    if (rpl && rpl.GetNode()) rpl.GetNode().SetParent(null);
+    return true;
+   }
+   ancestor = ancestor.GetParent();
+  }
+  return true;
+ }
  protected static bool Parent(IEntity entity, IEntity parent)
  {
   RplComponent childRpl = SCR_EntityHelper.GetEntityRplComponent(entity);
@@ -267,11 +286,14 @@ class ERR_TerrainTakeoverReplication
   if (childNode.GetParent() != parentNode) childNode.SetParent(parentNode);
   return childNode.GetParent() == parentNode;
  }
- static bool Link(ERR_GameMode mode)
+ static bool Link(ERR_GameMode mode, bool ownsChat)
  {
   IEntity factions = GetGame().GetFactionManager();
   if (!factions || !Parent(factions, mode)) return false;
-  if (!Parent(GetGame().GetLoadoutManager(), mode) || !Parent(GetGame().GetChat(), mode)) return false;
+  if (!Parent(GetGame().GetLoadoutManager(), mode)) return false;
+  // Retained native chat stays world-owned. Only a newly supplied fallback
+  // belongs to this replacement mode's replication node.
+  if (ownsChat && !Parent(GetGame().GetChat(), mode)) return false;
   SCR_DelegateFactionManagerComponent manager = SCR_DelegateFactionManagerComponent.GetInstance();
   if (!manager) return false;
   map<Faction, SCR_EditableFactionComponent> delegates = new map<Faction, SCR_EditableFactionComponent>();

docs/terrain-takeover.md

@@ -240,8 +240,12 @@ account admission. Publication and live-server changes remain with the owner.
 - The private `Prefabs/ERR/TerrainTakeover.et` triggers client cleanup. It releases
   only the captured original singleton components, waits for the new factions
   before catalog/identity initialization, and receives the server's faction
-  delegates. Chat is replicated to every client. The ordinary authored connector
+  delegates. The terrain's native chat service is retained on both peers, detached
-  remains separate from this bootstrap.
+  from any removed entity/replication parent, and never replaced or attached to
+  the new mode. The ordinary authored connector retains its own chat service.
+  If the terrain has no chat service, `TerrainTakeoverWithChat.et` supplies a
+  non-streaming replicated chat child instead. Selection depends on service
+  presence, not terrain name; both variants share the same takeover mode.
 - Arsenal, group, support-station and task managers release the original mode's
   cached instances on both peers. Task, map-marker and respawn getters resolve
   the current takeover mode even if an old destructor clears a shared cache.
@@ -260,6 +264,18 @@ account admission. Publication and live-server changes remain with the owner.
   a separate connected Windows client. The connected test recreates the player's
   controller and verifies the replacement managers in both rounds.
 
+On 14 October, the original Everon client log showed delayed removal of the
+original `ScriptedChatEntity` after the replacement registered, followed by
+`Cannot send message - ChatEntity is missing.` This blocked native chat commands,
+including administrator login, before authentication. `test_terrain_chat_retention.py`
+checks shared-service retention, nested parent detachment and fallback selection.
+The revised scripts compiled in Workbench; the authored-world native restart
+smoke completed two rounds and 21 assertions with no script/runtime failures.
+That run still reported existing engine/dependency errors, and the full repository
+check stopped on the existing missing root ID in `ERRM_AtlasLeaf.et`.
+Live remote login and takeover of both chat variants remain separate verification
+steps; the authored-world smoke does not exercise those paths.
+
 The earlier isolated prototype passed a Nogova Workbench prisoner-spawn test with
 16 generated sites and zero script errors. See
 [prototype evidence](evidence/scenario-takeover-2026-10-01/report.json). The current

tests/test_terrain_chat_retention.py

@@ -0,0 +1,89 @@
+"""Native chat stays world-owned across server/client terrain handover."""
+from policy_harness import ROOT, body, run
+
+core = ROOT / 'addons/core/Scripts/Game/ERR/00_Core'
+server = core / 'ERR_TerrainTakeover.c'
+client = core / 'ERR_TerrainTakeoverClient.c'
+managers = core / 'ERR_TerrainTakeoverManagers.c'
+run('#include <cassert>\n#include <string>\nusing ResourceName=std::string;\n' +
+    body(server, 'static ResourceName Bootstrap(') + r'''
+int main(){
+ assert(Bootstrap(true)=="{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et");
+ assert(Bootstrap(false)=="{DA8E364BC095712F}Prefabs/ERR/TerrainTakeoverWithChat.et");
+}
+''')
+retain = body(managers, 'static bool RetainManager(')
+retain = (retain.replace('IEntity entity', 'IEntity* entity')
+          .replace('IEntity ancestor', 'IEntity* ancestor')
+          .replace('array<IEntity> removed', 'Entities* removed')
+          .replace('RplComponent rpl', 'RplComponent* rpl')
+          .replace('SCR_EntityHelper.', 'SCR_EntityHelper::')
+          .replace('null', 'nullptr'))
+for value in ('entity', 'ancestor', 'removed', 'rpl', 'GetParent()', 'GetNode()'):
+    retain = retain.replace(value + '.', value + '->')
+run(r'''
+#include <cassert>
+#include <vector>
+#include <algorithm>
+struct Node {Node* parent=nullptr;int changes=0;void SetParent(Node* p){parent=p;changes++;}};
+struct RplComponent {Node* node=nullptr;Node* GetNode(){return node;}};
+struct IEntity {
+ IEntity* parent=nullptr;RplComponent* rpl=nullptr;bool refuseDetach=false;int removals=0;
+ IEntity* GetParent(){return parent;}
+ void RemoveChild(IEntity* child,bool keepWorld){assert(keepWorld&&child->parent==this);removals++;if(!refuseDetach)child->parent=nullptr;}
+};
+struct Entities:std::vector<IEntity*> {
+ using std::vector<IEntity*>::vector;
+ bool Contains(IEntity* entity){return std::find(begin(),end(),entity)!=end();}
+};
+namespace SCR_EntityHelper {RplComponent* GetEntityRplComponent(IEntity* e){return e->rpl;}}
+''' + retain + r'''
+int main(){
+ IEntity oldMode,chat,intermediate,unrelated;Entities removed{&oldMode,nullptr};
+ Node oldNode,chatNode;chatNode.parent=&oldNode;RplComponent chatRpl{&chatNode};chat.rpl=&chatRpl;
+ // Ordinary terrain chat is standalone: no unregister, replacement or reparent.
+ assert(RetainManager(&chat,&removed)&&chat.parent==nullptr&&chatNode.changes==0);
+ // Nested chat is detached before old hierarchy deletion; replication cannot
+ // later remove the retained service with the discarded mode either.
+ intermediate.parent=&oldMode;chat.parent=&intermediate;
+ assert(RetainManager(&chat,&removed)&&chat.parent==nullptr&&intermediate.removals==1);
+ assert(chatNode.parent==nullptr&&chatNode.changes==1);
+ assert(RetainManager(&chat,&removed)&&chatNode.changes==1);
+ chat.parent=&unrelated;assert(RetainManager(&chat,&removed)&&chat.parent==&unrelated&&unrelated.removals==0);
+ assert(!RetainManager(nullptr,&removed)&&!RetainManager(&chat,nullptr));
+ removed.push_back(&chat);assert(!RetainManager(&chat,&removed)&&chat.parent==&unrelated);removed.pop_back();
+ oldMode.refuseDetach=true;chat.parent=&oldMode;int changes=chatNode.changes;
+ assert(!RetainManager(&chat,&removed)&&chat.parent==&oldMode&&chatNode.changes==changes);
+ oldMode.refuseDetach=false;chat.rpl=nullptr;assert(RetainManager(&chat,&removed)&&chat.parent==nullptr);
+}
+''')
+
+drain = body(server, 'protected void ERR_DrainTerrainMode(')
+capture = body(client, 'void ERR_ClientCaptureOriginal(')
+handover = body(client, 'void ERR_BeginClientTerrainTakeover(')
+assert 'GetChat()' not in drain.split('array<IEntity> managers =', 1)[1].split(';', 1)[0]
+assert 'm_ERRClientOldManagers.Insert(GetChat())' not in capture
+assert drain.index('RetainManager(m_ERRTerrainChat, managers)') < drain.index('m_ERRTerrainOriginal.OnGameEnd()')
+assert handover.index('RetainManager(GetChat(), m_ERRClientOldManagers)') < handover.index('mode.OnGameEnd()')
+assert 'GetChat() == m_ERRTerrainChat' in body(server, 'protected bool ERR_TerrainRegistrationsEmpty(')
+assert 'm_ERRTerrainChat = null' in body(server, 'protected void ERR_ResetTerrainTakeover(')
+preflight = body(server, 'protected bool ERR_PreflightTerrainTakeover(')
+create = body(server, 'protected void ERR_CreateTerrainMode(')
+assert 'Bootstrap(GetChat() != null)' in preflight
+assert 'if (!GetChat())' not in preflight
+assert 'Bootstrap(m_ERRTerrainChat != null)' in create
+assert 'Link(mode, !m_ERRTerrainChat)' in create
+assert 'if (m_ERRTerrainChat && !ERR_TerrainTakeoverReplication.RetainManager' in drain
+assert 'if (GetChat() && !ERR_TerrainTakeoverReplication.RetainManager' in handover
+assert '&& m_ERRTerrainChat &&' not in body(server, 'protected bool ERR_TerrainRegistrationsEmpty(')
+assert 'if (ownsChat && !Parent(GetGame().GetChat(), mode)) return false' in body(managers, 'static bool Link(')
+prefabs = ROOT / 'addons/core/Prefabs/ERR'
+assert 'ScriptedChatEntity' not in (prefabs / 'TerrainTakeover.et').read_text()
+fallback = (prefabs / 'TerrainTakeoverWithChat.et').read_text()
+assert '"{9D182739ABEF405C}Prefabs/ERR/TerrainTakeover.et"' in fallback
+assert fallback.count('ScriptedChatEntity Chat') == 1
+assert 'Streamable Disabled' in fallback
+assert '{DA8E364BC095712F}Prefabs/ERR/TerrainTakeoverWithChat.et' in (prefabs / 'TerrainTakeoverWithChat.et.meta').read_text()
+assert 'ScriptedChatEntity' in (prefabs / 'TerrainConnector.et').read_text()
+assert 'ScriptedChatEntity' in (ROOT / 'addons/core/Worlds/ERR_Everon_Layers/default.layer').read_text()
+print('PASS: native chat retained on both peers, nested ownership detached, absent chat supplied by replicated fallback, authored mission chat preserved')

tools/check.py

@@ -8,6 +8,7 @@ from prefab_identity import check_prefabs
 ROOT=Path(__file__).resolve().parents[1]
 BASE='58D0FB3206B6F859'
 def check():
+ subprocess.run([sys.executable,str(ROOT/'tests/test_terrain_chat_retention.py')],check=True)
  subprocess.run([sys.executable,str(ROOT/'tests/test_empty_server_restart.py')],check=True)
  subprocess.run([sys.executable,str(ROOT/'tests/test_rescue_factions.py')],check=True)
  subprocess.run([sys.executable,str(ROOT/'tests/test_rescue_landing.py')],check=True)