refactor(runtime): close canonical gameplay ownership

Unify the toolbar shortcut manager with Runtime inventory state, route retail-ordered shortcut and spellbook command effects through the canonical owners, and make retained controllers borrow those exact instances. Remove the item-interaction transaction fallback and add graphical/no-window parity plus failure-safe terminal ownership-ledger coverage.

Co-authored-by: Codex <codex@openai.com>

docs/research/2026-07-26-slice-j4-5-retail-local-command-order.md

@@ -0,0 +1,154 @@
+# Slice J4.5 — retail local gameplay-command ordering
+
+## Scope
+
+This note fixes the command/local-state ordering used while J4.5 removes the
+last graphical-only shortcut and spellbook mirrors. It does not add a new
+gameplay algorithm. It preserves the existing packet builders and moves the
+retail `PlayerModule` mutation onto the one Runtime-owned state object.
+
+Oracle:
+
+- `docs/research/named-retail/acclient_2013_pseudo_c.txt`
+- `docs/research/named-retail/acclient.h`
+
+The existing wire ports remain:
+
+- `AcDream.Core.Net.Messages.ClientCommandRequests`
+- `AcDream.Core.Net.WorldSession`
+- `AcDream.App.Net.LiveSessionCommandRouter`
+
+## Retail pseudocode
+
+### Toolbar shortcut add
+
+Retail anchors:
+
+- `gmToolbarUI::AddShortcut @ 0x004BD9A0`
+- `PlayerModule::AddShortCut @ 0x005D29A0`
+- `ShortCutManager::AddShortCut @ 0x005D5790`
+
+```text
+if slot is valid and the toolbar accepts the item:
+    create ShortCutData(slot, objectId, spellId)
+    send Event_AddShortCut(data)
+    playerModule.AddShortCut(data)
+
+ShortCutManager.AddShortCut(data):
+    if data.index is outside [0, 18):
+        return false
+    if the slot already owns a record:
+        replace all three record fields in place
+    else:
+        allocate and install one record
+    return true
+```
+
+### Toolbar shortcut remove
+
+Retail anchors:
+
+- `gmToolbarUI::RemoveShortcut @ 0x004BD450`
+- `PlayerModule::RemoveShortCut @ 0x005D29E0`
+- `ShortCutManager::RemoveShortCut @ 0x005D5690`
+
+```text
+find the slot containing the selected shortcut
+flush the visible slot
+if this is a persisted removal:
+    send Event_RemoveShortCut(slot)
+    playerModule.RemoveShortCut(slot)
+
+ShortCutManager.RemoveShortCut(slot):
+    if slot is outside [0, 18):
+        return
+    destroy the record if present
+    set the slot to empty
+```
+
+### Favorite spell add/remove
+
+Retail anchors:
+
+- spell-menu handler at `0x004C64C0`
+- `PlayerModule::AddSpellFavorite @ 0x005D43E0`
+- `PlayerModule::RemoveSpellFavorite @ 0x005D4910`
+
+```text
+add:
+    if tab is in [0, 8):
+        insert spellId at position in that tab
+    send Event_AddSpellFavorite(spellId, position, tab)
+
+remove:
+    if tab is in [0, 8):
+        remove spellId from that tab
+    send Event_RemoveSpellFavorite(spellId, tab)
+```
+
+Unlike toolbar shortcuts, favorite-spell state changes locally before the
+outbound event.
+
+### Spellbook filter
+
+Retail anchors:
+
+- `gmSpellbookUI::UpdateFilter @ 0x0048B5E0`
+
+```text
+derive the changed school/level bit
+derive the next filter bitfield from the button state
+if next differs from current:
+    playerModule.SetSpellbookFilter(next)
+    send Event_SpellbookFilterEvent(next)
+rebuild the visible spell list
+scroll to row zero
+```
+
+### Desired component level
+
+Retail anchors:
+
+- `gmSpellComponentUI::ListenToElementMessage @ 0x0048A420`
+- `PlayerModule::SetDesiredCompLevel @ 0x005D4940`
+
+```text
+parse the edited amount
+if amount is in [0, 5000]:
+    send Event_SetDesiredComponentLevel(componentId, amount)
+    playerModule.SetDesiredCompLevel(componentId, amount)
+else:
+    restore the current value in the editor
+
+PlayerModule.SetDesiredCompLevel(componentId, amount):
+    if amount is outside [0, 5000]:
+        return false
+    lazily create the desired-component table
+    replace an existing value or add a new value
+    return true
+```
+
+Retail retains an explicit zero-valued entry. J4.5 preserves that distinction;
+only the clear-list command destroys the complete desired-component table.
+
+### Clear desired components
+
+Retail anchors:
+
+- chat-command handler at `0x0056FE4A`
+- `PlayerModule::ClearDesiredCompList @ 0x005D2A00`
+
+```text
+send Event_SetDesiredComponentLevel(INVALID_DID, -1)
+destroy the complete desired-component table
+set the table pointer to null
+publish the spell-component UI update notice
+```
+
+## J4.5 integration consequence
+
+The graphical toolbar, retained spell UI, plugins, and future no-window host
+must all mutate the same Runtime-owned `ShortcutStore` and `Spellbook`.
+Graphical controllers may initiate the operation, but they may not retain or
+reconstruct another mutable slot/favorite/component collection. Commands stay
+synchronous; no additional frame or background queue is introduced.

src/AcDream.App/Composition/InteractionRetainedUiComposition.cs

@@ -285,6 +285,7 @@ internal sealed class RetailInteractionRetainedUiCompositionFactory
         DeferredSelectionUiAuthority selection = late.Selection;
         return new ItemInteractionController(
             d.Inventory.Objects,
+            d.Inventory.Transactions,
             playerGuid: () => d.PlayerIdentity.ServerGuid,
             sendUse: null,
             sendExamine: guid => session.CurrentSession?.SendAppraise(guid),
@@ -334,8 +335,7 @@ internal sealed class RetailInteractionRetainedUiCompositionFactory
             {
                 d.Inventory.ExternalContainers.RequestOpen(guid);
             },
-            requestUse: selection.RequestUse,
-            transactions: d.Inventory.Transactions);
+            requestUse: selection.RequestUse);
     }
 
     public RetainedUiComposition CreateRetainedUi(
@@ -592,7 +592,7 @@ internal sealed class RetailInteractionRetainedUiCompositionFactory
                     d.Window.Close),
                 Toolbar: new ToolbarRuntimeBindings(
                     d.Inventory.Objects,
-                    () => d.Inventory.Shortcuts.Items,
+                    d.Inventory.Shortcuts,
                     iconComposer.GetIcon,
                     iconComposer.GetDragIcon,
                     guid => late.Session.TryUseItem(guid, d.Log),

src/AcDream.App/Net/LiveSessionRuntimeFactory.cs

@@ -254,7 +254,7 @@ internal sealed class LiveSessionRuntimeFactory
     private LiveInventorySessionBindings CreateInventoryBindings() => new(
         _domain.Inventory.Objects,
         PlayerGuid: () => _player.Identity.ServerGuid,
-        OnShortcuts: _domain.Inventory.Shortcuts.Replace,
+        OnShortcuts: _domain.Inventory.Shortcuts.Load,
         OnUseDone: error =>
         {
             _domain.Inventory.ExternalContainers.ApplyUseDone(error);

src/AcDream.App/Runtime/CurrentGameRuntimeAdapter.cs

@@ -71,6 +71,8 @@ internal sealed class CurrentGameRuntimeAdapter
             sessionHost,
             commands,
             _view,
+            inventory,
+            character,
             selectionState,
             selection,
             gameplayInput,

src/AcDream.App/Runtime/CurrentGameRuntimeCommandAdapter.cs

@@ -5,6 +5,7 @@ using AcDream.App.Net;
 using AcDream.Core.Selection;
 using AcDream.Core.Items;
 using AcDream.Runtime;
+using AcDream.Runtime.Gameplay;
 using AcDream.Runtime.Session;
 using AcDream.UI.Abstractions;
 using AcDream.UI.Abstractions.Input;
@@ -31,6 +32,8 @@ internal sealed class CurrentGameRuntimeCommandAdapter
     private readonly LiveSessionHost _sessionHost;
     private readonly ICommandBus _commands;
     private readonly CurrentGameRuntimeViewAdapter _view;
+    private readonly RuntimeInventoryState _inventory;
+    private readonly RuntimeCharacterState _character;
     private readonly SelectionState _selectionState;
     private readonly SelectionInteractionController _selection;
     private readonly GameplayInputFrameController _gameplayInput;
@@ -42,6 +45,8 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         LiveSessionHost sessionHost,
         ICommandBus commands,
         CurrentGameRuntimeViewAdapter view,
+        RuntimeInventoryState inventory,
+        RuntimeCharacterState character,
         SelectionState selectionState,
         SelectionInteractionController selection,
         GameplayInputFrameController gameplayInput,
@@ -52,6 +57,8 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         _sessionHost = sessionHost ?? throw new ArgumentNullException(nameof(sessionHost));
         _commands = commands ?? throw new ArgumentNullException(nameof(commands));
         _view = view ?? throw new ArgumentNullException(nameof(view));
+        _inventory = inventory ?? throw new ArgumentNullException(nameof(inventory));
+        _character = character ?? throw new ArgumentNullException(nameof(character));
         _selectionState = selectionState
             ?? throw new ArgumentNullException(nameof(selectionState));
         _selection = selection ?? throw new ArgumentNullException(nameof(selection));
@@ -288,8 +295,13 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        if (command.Index < 0
-            || (command.ObjectId == 0u && command.SpellId == 0u))
+        var entry = new ShortcutEntry(
+            command.Index,
+            command.ObjectId,
+            command.SpellId);
+        if (!_inventory.TryAddShortcut(
+                entry,
+                () => _commands.Publish(new AddShortcutRuntimeCmd(entry))))
         {
             return EmitResult(
                 RuntimeCommandDomain.InventoryState,
@@ -298,10 +310,6 @@ internal sealed class CurrentGameRuntimeCommandAdapter
                 command.ObjectId);
         }
 
-        _commands.Publish(new AddShortcutRuntimeCmd(new ShortcutEntry(
-            command.Index,
-            command.ObjectId,
-            command.SpellId)));
         return EmitResult(
             RuntimeCommandDomain.InventoryState,
             operation: 0,
@@ -316,7 +324,10 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        if (index < 0)
+        if (!_inventory.TryRemoveShortcut(
+                index,
+                () => _commands.Publish(
+                    new RemoveShortcutRuntimeCmd((uint)index))))
         {
             return EmitResult(
                 RuntimeCommandDomain.InventoryState,
@@ -324,7 +335,6 @@ internal sealed class CurrentGameRuntimeCommandAdapter
                 RuntimeCommandStatus.Rejected);
         }
 
-        _commands.Publish(new RemoveShortcutRuntimeCmd((uint)index));
         return EmitResult(
             RuntimeCommandDomain.InventoryState,
             operation: 1,
@@ -340,9 +350,14 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        if ((uint)tabIndex >= 8u
-            || position < 0
-            || spellId == 0u)
+        if (!_character.TryAddFavorite(
+                tabIndex,
+                position,
+                spellId,
+                () => _commands.Publish(new AddFavoriteRuntimeCmd(
+                    spellId,
+                    position,
+                    tabIndex))))
         {
             return EmitResult(
                 RuntimeCommandDomain.Spellbook,
@@ -351,10 +366,6 @@ internal sealed class CurrentGameRuntimeCommandAdapter
                 spellId);
         }
 
-        _commands.Publish(new AddFavoriteRuntimeCmd(
-            spellId,
-            position,
-            tabIndex));
         return EmitResult(
             RuntimeCommandDomain.Spellbook,
             operation: 0,
@@ -370,7 +381,11 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        if ((uint)tabIndex >= 8u || spellId == 0u)
+        if (!_character.TryRemoveFavorite(
+                tabIndex,
+                spellId,
+                () => _commands.Publish(
+                    new RemoveFavoriteRuntimeCmd(spellId, tabIndex))))
         {
             return EmitResult(
                 RuntimeCommandDomain.Spellbook,
@@ -379,7 +394,6 @@ internal sealed class CurrentGameRuntimeCommandAdapter
                 spellId);
         }
 
-        _commands.Publish(new RemoveFavoriteRuntimeCmd(spellId, tabIndex));
         return EmitResult(
             RuntimeCommandDomain.Spellbook,
             operation: 1,
@@ -394,7 +408,10 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        _commands.Publish(new SetSpellbookFilterRuntimeCmd(filters));
+        _character.SetSpellbookFilter(
+            filters,
+            () => _commands.Publish(
+                new SetSpellbookFilterRuntimeCmd(filters)));
         return EmitResult(
             RuntimeCommandDomain.Spellbook,
             operation: 2,
@@ -433,7 +450,12 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        if (componentId == 0u)
+        if (!_character.TrySetDesiredComponent(
+                componentId,
+                amount,
+                () => _commands.Publish(new SetDesiredComponentRuntimeCmd(
+                    componentId,
+                    amount))))
         {
             return EmitResult(
                 RuntimeCommandDomain.Spellbook,
@@ -442,9 +464,6 @@ internal sealed class CurrentGameRuntimeCommandAdapter
                 componentId);
         }
 
-        _commands.Publish(new SetDesiredComponentRuntimeCmd(
-            componentId,
-            amount));
         return EmitResult(
             RuntimeCommandDomain.Spellbook,
             operation: 4,
@@ -458,7 +477,9 @@ internal sealed class CurrentGameRuntimeCommandAdapter
         RuntimeCommandStatus gate = Validate(expectedGeneration, requireWorld: true);
         if (gate != RuntimeCommandStatus.Accepted)
             return Result(gate);
-        _commands.Publish(new ClearDesiredComponentsRuntimeCmd());
+        _character.ClearDesiredComponents(
+            () => _commands.Publish(
+                new ClearDesiredComponentsRuntimeCmd()));
         return EmitResult(
             RuntimeCommandDomain.Spellbook,
             operation: 5,

src/AcDream.App/Studio/FixtureProvider.cs

@@ -117,7 +117,7 @@ public static class FixtureProvider
                 return ToolbarController.Bind(
                     layout,
                     objects,
-                    shortcuts:  () => System.Array.Empty<ShortcutEntry>(),
+                    shortcuts:  new ShortcutStore(),
                     iconIds:    MakeIconIds(stack),
                     useItem:    _ => { },
                     combatState: null,
@@ -141,6 +141,7 @@ public static class FixtureProvider
                 var selection = new AcDream.Core.Selection.SelectionState();
                 var itemInteraction = new ItemInteractionController(
                     objects,
+                    new InventoryTransactionState(objects),
                     () => SampleData.PlayerGuid,
                     sendUse: null,
                     sendUseWithTarget: null,

src/AcDream.App/UI/ItemInteractionController.cs

@@ -62,7 +62,6 @@ public sealed class ItemInteractionController : IDisposable
     private readonly AutoWieldController _autoWield;
     private readonly Action<uint, ItemUseRequestReservation>? _requestUse;
     private readonly InventoryTransactionState _transactions;
-    private readonly bool _ownsTransactions;
 
     private long _lastUseMs = long.MinValue / 2;
     private uint _consumedPrimaryClickTarget;
@@ -74,6 +73,7 @@ public sealed class ItemInteractionController : IDisposable
 
     public ItemInteractionController(
         ClientObjectTable objects,
+        InventoryTransactionState transactions,
         Func<uint> playerGuid,
         Action<uint>? sendUse,
         Action<uint, uint>? sendUseWithTarget,
@@ -103,8 +103,7 @@ public sealed class ItemInteractionController : IDisposable
         Action<uint>? requestExternalContainer = null,
         CombatState? combatState = null,
         Action<CombatMode>? sendChangeCombatMode = null,
-        Action<uint, ItemUseRequestReservation>? requestUse = null,
-        InventoryTransactionState? transactions = null)
+        Action<uint, ItemUseRequestReservation>? requestUse = null)
     {
         _objects = objects ?? throw new ArgumentNullException(nameof(objects));
         _playerGuid = playerGuid ?? throw new ArgumentNullException(nameof(playerGuid));
@@ -135,18 +134,14 @@ public sealed class ItemInteractionController : IDisposable
         _systemMessage = systemMessage;
         _requestUse = requestUse;
         _interactionState = interactionState ?? new InteractionState();
-        _transactions = transactions ?? new InventoryTransactionState(_objects);
-        _ownsTransactions = transactions is null;
+        _transactions = transactions
+            ?? throw new ArgumentNullException(nameof(transactions));
         if (!ReferenceEquals(_transactions.Objects, _objects))
         {
-            if (_ownsTransactions)
-                _transactions.Dispose();
             throw new ArgumentException(
                 "The inventory transaction owner must borrow the controller's exact object table.",
                 nameof(transactions));
         }
-        try
-        {
         _autoWield = new AutoWieldController(
             _objects,
             _playerGuid,
@@ -156,13 +151,6 @@ public sealed class ItemInteractionController : IDisposable
             _systemMessage,
             combatState,
             sendChangeCombatMode);
-        }
-        catch
-        {
-            if (_ownsTransactions)
-                _transactions.Dispose();
-            throw;
-        }
         _interactionState.Changed += OnInteractionModeChanged;
         _transactions.StateChanged += OnTransactionStateChanged;
         _transactions.RequestCompleted += OnInventoryRequestCompleted;
@@ -1166,8 +1154,6 @@ public sealed class ItemInteractionController : IDisposable
         _transactions.ObjectTableCleared -= OnInventoryObjectsCleared;
         _transactions.RequestCompleted -= OnInventoryRequestCompleted;
         _transactions.StateChanged -= OnTransactionStateChanged;
-        if (_ownsTransactions)
-            _transactions.Dispose();
         _autoWield.Dispose();
     }
 

src/AcDream.App/UI/Layout/SpellbookWindowController.cs

@@ -251,7 +251,6 @@ public sealed class SpellbookWindowController : IRetainedPanelController
         // gmSpellbookUI::UpdateFilter @ 0x0048B5E0 persists only the changed
         // filter bitfield, rebuilds from learned spells, and returns to row zero.
         uint filters = _spellbook.SpellbookFilters ^ mask;
-        _spellbook.SetSpellbookFilters(filters);
         _sendFilter(filters);
         _spellList.Scroll.SetScrollY(0);
     }
@@ -383,7 +382,6 @@ public sealed class SpellbookWindowController : IRetainedPanelController
                     }
                     if (parsed == committed) return;
                     committed = parsed;
-                    _spellbook.SetDesiredComponent(componentId, parsed);
                     _setDesiredComponent(componentId, parsed);
                 }
                 desiredField.OnSubmit = Commit;

src/AcDream.App/UI/Layout/SpellcastingUiController.cs

@@ -209,7 +209,6 @@ public sealed class SpellcastingUiController : IRetainedPanelController
         }
         int position = spells.Count;
         _addFavorite?.Invoke(_activeTab, position, spellId);
-        _spellbook.SetFavorite(_activeTab, position, spellId);
         SelectSpell(spellId);
     }
 
@@ -424,13 +423,15 @@ public sealed class SpellcastingUiController : IRetainedPanelController
     private void BeginFavoriteDrag(SpellFavoriteDragPayload payload)
         => _removeFavorite?.Invoke(payload.SourceTab, payload.SpellId);
 
-    private void EndFavoriteDrag(SpellFavoriteDragPayload payload)
-        => _spellbook.RemoveFavorite(payload.SourceTab, payload.SpellId);
+    private static void EndFavoriteDrag(SpellFavoriteDragPayload payload)
+    {
+        // The press-time command already performed retail's PlayerModule
+        // removal on the one Runtime-owned Spellbook.
+    }
 
     private void DropFavorite(SpellFavoriteDragPayload payload, int targetTab, int targetPosition)
     {
         _addFavorite?.Invoke(targetTab, targetPosition, payload.SpellId);
-        _spellbook.SetFavorite(targetTab, targetPosition, payload.SpellId);
         _selected[targetTab] = payload.SpellId;
     }
 
@@ -443,7 +444,6 @@ public sealed class SpellcastingUiController : IRetainedPanelController
         // CM_Magic::SendNotice_AddSpellShortcut; the open spellcasting menu
         // chooses the favorite tab/position and persists it.
         _addFavorite?.Invoke(targetTab, targetPosition, payload.SpellId);
-        _spellbook.SetFavorite(targetTab, targetPosition, payload.SpellId);
         _selected[targetTab] = payload.SpellId;
     }
 

src/AcDream.App/UI/Layout/ToolbarController.cs

@@ -63,12 +63,10 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     private readonly List<(uint PanelId, UiButton Button)> _panelButtons = new();
     private readonly ClientObjectTable _repo;
     private readonly CombatState? _combatState;
-    private readonly Func<IReadOnlyList<ShortcutEntry>> _shortcuts;
+    private readonly ShortcutStore _store;
     private readonly Func<ItemType, uint, uint, uint, uint, uint> _iconIds;  // (itemType, icon, underlay, overlay, effects) → GL tex
     private readonly Func<ItemType, uint, uint, uint, uint, uint>? _dragIconIds;
     private readonly Action<uint> _useItem;                   // guid → fire UseObject
-    private readonly ShortcutStore _store = new();
-    private bool _storeLoaded;
     private readonly Action<ShortcutEntry>? _sendAddShortcut;
     private readonly Action<uint>? _sendRemoveShortcut;      // (index)
     private readonly ItemInteractionController? _itemInteraction;
@@ -95,7 +93,7 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     private ToolbarController(
         ImportedLayout layout,
         ClientObjectTable repo,
-        Func<IReadOnlyList<ShortcutEntry>> shortcuts,
+        ShortcutStore shortcuts,
         Func<ItemType, uint, uint, uint, uint, uint> iconIds,
         Action<uint> useItem,
         CombatState? combatState,
@@ -116,7 +114,7 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     {
         _repo = repo;
         _combatState = combatState;
-        _shortcuts = shortcuts;
+        _store = shortcuts ?? throw new ArgumentNullException(nameof(shortcuts));
         _iconIds = iconIds;
         _dragIconIds = dragIconIds;
         _useItem = useItem;
@@ -213,6 +211,7 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
         repo.ObjectRemoved += OnRepositoryObjectChanged;
         repo.ObjectMoved   += OnRepositoryObjectMoved;
         repo.Cleared       += OnRepositoryCleared;
+        _store.Changed     += Populate;
         RefreshAmmo();
         RefreshUseButton();
     }
@@ -296,21 +295,13 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     /// Returns true if <paramref name="guid"/> is one of the currently-active shortcut guids
     /// (i.e., present in the live <see cref="AcDream.Core.Items.ShortcutStore"/>).
     /// Used to gate repo-event subscriptions so we don't re-populate on every creature spawn.
-    /// Falls back to scanning <c>_shortcuts()</c> before the store is loaded (pre-PD window).
     /// </summary>
     private bool IsShortcutGuid(uint guid)
     {
-        if (_storeLoaded)
-        {
-            for (int s = 0; s < AcDream.Core.Items.ShortcutStore.SlotCount; s++)
+        for (int s = 0; s < ShortcutStore.SlotCount; s++)
             if (_store.Get(s) == guid) return true;
         return false;
     }
-        // Store not yet loaded — fall back to the shortcuts provider (pre-PD window).
-        foreach (var sc in _shortcuts())
-            if (sc.ObjectId == guid) return true;
-        return false;
-    }
 
     /// <summary>
     /// Create and bind a <see cref="ToolbarController"/> to <paramref name="layout"/>.
@@ -320,7 +311,10 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     /// </summary>
     /// <param name="layout">Imported toolbar layout (LayoutDesc 0x21000016).</param>
     /// <param name="repo">Live item repository — must stay alive for the controller's lifetime.</param>
-    /// <param name="shortcuts">Provider for the current shortcut bar list.</param>
+    /// <param name="shortcuts">
+    /// Runtime-owned retail shortcut manager. The toolbar borrows this exact
+    /// mutable owner; it never reconstructs another slot map.
+    /// </param>
     /// <param name="iconIds">Resolves (itemType, iconId, underlayId, overlayId, effects) → GL texture handle.</param>
     /// <param name="useItem">Callback fired when a bound slot is clicked; receives the item guid.</param>
     /// <param name="combatState">
@@ -345,7 +339,7 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     public static ToolbarController Bind(
         ImportedLayout layout,
         ClientObjectTable repo,
-        Func<IReadOnlyList<ShortcutEntry>> shortcuts,
+        ShortcutStore shortcuts,
         Func<ItemType, uint, uint, uint, uint, uint> iconIds,
         Action<uint> useItem,
         CombatState? combatState = null,
@@ -417,19 +411,11 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     /// Entries whose item is not yet in the repo are silently skipped here; the
     /// <c>ObjectAdded</c> event re-fires this method when the item arrives
     /// (matching retail's <c>SetDelayedShortcutNum</c> deferred-rebind path).
-    /// As of B.2: the <see cref="AcDream.Core.Items.ShortcutStore"/> is the
-    /// authoritative in-session slot map; <c>_shortcuts()</c> seeds it on first call.
+    /// The Runtime-owned <see cref="AcDream.Core.Items.ShortcutStore"/> is the
+    /// authoritative in-session slot map.
     /// </summary>
     public void Populate()
     {
-        // Lazy-load the store from the login shortcut list the first time it's present (PD arrives
-        // after Bind); thereafter the store is authoritative and drag ops mutate it directly.
-        if (!_storeLoaded && _shortcuts().Count > 0)
-        {
-            _store.Load(_shortcuts());
-            _storeLoaded = true;
-        }
-
         foreach (var list in _slots) list?.Cell.Clear();
 
         for (int slot = 0; slot < _slots.Length; slot++)
@@ -654,7 +640,6 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
         if (_itemInteraction?.IsOwnedByPlayer(itemId) != true)
             return false;
 
-        EnsureStoreLoadedForMutation();
         for (int slot = 0; slot < _slots.Length; slot++)
             if (_store.Get(slot) == itemId)
                 return false;
@@ -672,20 +657,11 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
             return false;
 
         var entry = new ShortcutEntry(empty, itemId, 0u);
-        _store.Set(entry);
         _sendAddShortcut?.Invoke(entry);
-        Populate();
+        _store.Set(entry);
         return true;
     }
 
-    private void EnsureStoreLoadedForMutation()
-    {
-        if (_storeLoaded)
-            return;
-        _store.Load(_shortcuts());
-        _storeLoaded = true;
-    }
-
     // ── IItemListDragHandler (B.2 live handler) ──────────────────────────────
     // Retail: gmToolbarUI is the m_dragHandler for every shortcut slot list.
     // Retail model (remove-on-lift / place-on-drop / no-restore):
@@ -705,9 +681,8 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
         // Retail RecvNotice_ItemListBeginDrag → RemoveShortcut (0x004bd930/0x004bd450): the lifted
         // shortcut leaves the bar (+ wire) the instant the drag starts; it's re-placed only on a
         // drop onto a slot. Off-bar release leaves it removed.
-        _store.Remove(payload.SourceSlot);
         _sendRemoveShortcut?.Invoke((uint)payload.SourceSlot);
-        Populate();
+        _store.Remove(payload.SourceSlot);
     }
 
     /// <inheritdoc/>
@@ -717,7 +692,6 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     /// <inheritdoc/>
     public void HandleDropRelease(UiItemList targetList, UiItemSlot targetCell, ItemDragPayload payload)
     {
-        EnsureStoreLoadedForMutation();
         ShortcutDropSource source = payload.SourceKind == ItemDragSource.ShortcutBar
             ? ShortcutDropSource.ShortcutAlias
             : ShortcutDropSource.FreshItem;
@@ -727,7 +701,6 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
             _store.Snapshot(), source, payload.SourceSlot, targetCell.SlotIndex, dragged);
 
         ApplyShortcutPlan(plan);
-        Populate();
     }
 
     /// <summary>
@@ -736,32 +709,29 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
     /// </summary>
     public void ReplaceFullyMergedShortcut(uint oldObjectId, uint newObjectId)
     {
-        EnsureStoreLoadedForMutation();
         ShortcutMutation[] plan = ShortcutDropPlanner.PlanFullStackMerge(
             _store.Snapshot(), oldObjectId, newObjectId);
         ApplyShortcutPlan(plan);
-        if (plan.Length > 0)
-            Populate();
     }
 
     private void ApplyShortcutPlan(IReadOnlyList<ShortcutMutation> plan)
     {
-        // Apply the already-validated transaction locally first, then reproduce the
-        // planner's exact Remove/Add wire order. Shortcut events have no rejection reply.
+        // Retail sends each shortcut event immediately before applying the same
+        // PlayerModule mutation (gmToolbarUI @ 0x004BD450/0x004BD9A0).
+        // Production commands mutate this exact Runtime-owned store; the
+        // idempotent local call also keeps isolated controller fixtures useful.
         foreach (var mutation in plan)
         {
             if (mutation.Kind == ShortcutMutationKind.Remove)
+            {
+                _sendRemoveShortcut?.Invoke((uint)mutation.Slot);
                 _store.Remove(mutation.Slot);
+            }
             else if (mutation.Entry is { } entry)
+            {
+                _sendAddShortcut?.Invoke(entry);
                 _store.Set(entry);
             }
-
-        foreach (var mutation in plan)
-        {
-            if (mutation.Kind == ShortcutMutationKind.Remove)
-                _sendRemoveShortcut?.Invoke((uint)mutation.Slot);
-            else if (mutation.Entry is { } entry)
-                _sendAddShortcut?.Invoke(entry);
         }
     }
 
@@ -800,5 +770,6 @@ public sealed class ToolbarController : IItemListDragHandler, IRetainedPanelCont
         _repo.ObjectRemoved -= OnRepositoryObjectChanged;
         _repo.ObjectMoved   -= OnRepositoryObjectMoved;
         _repo.Cleared       -= OnRepositoryCleared;
+        _store.Changed      -= Populate;
     }
 }

src/AcDream.App/UI/RetailUiRuntime.cs

@@ -90,7 +90,7 @@ public sealed record IndicatorRuntimeBindings(
 
 public sealed record ToolbarRuntimeBindings(
     ClientObjectTable Objects,
-    Func<IReadOnlyList<ShortcutEntry>> Shortcuts,
+    ShortcutStore Shortcuts,
     Func<ItemType, uint, uint, uint, uint, uint> ResolveIcon,
     Func<ItemType, uint, uint, uint, uint, uint> ResolveDragIcon,
     Action<uint> UseItem,

src/AcDream.Core/Chat/ChatCommandTargetState.cs

@@ -42,6 +42,15 @@ public sealed class ChatCommandTargetState : IDisposable
         }
     }
 
+    public bool IsDisposed
+    {
+        get
+        {
+            lock (_gate)
+                return _disposed;
+        }
+    }
+
     /// <summary>
     /// Forget character-scoped command targets without clearing visible
     /// transcript history.

src/AcDream.Core/Items/ShortcutStore.cs

@@ -9,10 +9,40 @@ namespace AcDream.Core.Items;
 /// <see cref="ShortcutEntry"/> fields, including non-object records that the object-only
 /// <c>gmToolbarUI</c> does not render.
 /// </summary>
-public sealed class ShortcutStore
+public sealed class ShortcutStore : IDisposable
 {
     public const int SlotCount = 18;
     private readonly ShortcutEntry?[] _entries = new ShortcutEntry?[SlotCount];
+    private ShortcutEntry[] _items = [];
+    private Action? _changed;
+    private long _revision;
+    private long _dispatchFailureCount;
+    private bool _disposed;
+
+    /// <summary>
+    /// Raised synchronously after the canonical slot map changes. One failing
+    /// observer cannot prevent another host from seeing the same mutation.
+    /// </summary>
+    public event Action? Changed
+    {
+        add
+        {
+            ObjectDisposedException.ThrowIf(_disposed, this);
+            _changed += value;
+        }
+        remove => _changed -= value;
+    }
+
+    /// <summary>Stable packed-order view of all present shortcut records.</summary>
+    public IReadOnlyList<ShortcutEntry> Items => Volatile.Read(ref _items);
+
+    public int Count => Volatile.Read(ref _items).Length;
+    public long Revision => Interlocked.Read(ref _revision);
+    public int SubscriberCount => _changed?.GetInvocationList().Length ?? 0;
+    public long DispatchFailureCount =>
+        Interlocked.Read(ref _dispatchFailureCount);
+    public Exception? LastDispatchFailure { get; private set; }
+    public bool IsDisposed => _disposed;
 
     /// <summary>
     /// Replace all slots from packed entries. Invalid signed indices are rejected exactly
@@ -21,9 +51,12 @@ public sealed class ShortcutStore
     /// </summary>
     public void Load(IEnumerable<ShortcutEntry> entries)
     {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(entries);
         Array.Clear(_entries);
         foreach (var entry in entries)
-            Set(entry);
+            SetCore(entry);
+        PublishChanged();
     }
 
     /// <summary>Raw entry at <paramref name="slot"/>, or null for absent/out-of-range.</summary>
@@ -44,8 +77,9 @@ public sealed class ShortcutStore
 
     public void Set(ShortcutEntry entry)
     {
-        if ((uint)entry.Index < SlotCount)
-            _entries[entry.Index] = entry;
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        if (SetCore(entry))
+            PublishChanged();
     }
 
     /// <summary>Create/replace a retail object shortcut; toolbar-created records use spell word zero.</summary>
@@ -53,7 +87,79 @@ public sealed class ShortcutStore
 
     public void Remove(int slot)
     {
-        if ((uint)slot < SlotCount)
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        if ((uint)slot >= SlotCount || _entries[slot] is null)
+            return;
         _entries[slot] = null;
+        PublishChanged();
+    }
+
+    /// <summary>
+    /// Clear the complete retail shortcut manager while retaining this owner
+    /// for the next session.
+    /// </summary>
+    public void Clear()
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        Array.Clear(_entries);
+        PublishChanged();
+    }
+
+    public void Dispose()
+    {
+        if (_disposed)
+            return;
+        _disposed = true;
+        Array.Clear(_entries);
+        RebuildItems();
+        Interlocked.Increment(ref _revision);
+        DispatchChanged();
+        _changed = null;
+    }
+
+    private bool SetCore(ShortcutEntry entry)
+    {
+        if ((uint)entry.Index >= SlotCount
+            || _entries[entry.Index] == entry)
+        {
+            return false;
+        }
+        _entries[entry.Index] = entry;
+        return true;
+    }
+
+    private void PublishChanged()
+    {
+        RebuildItems();
+        Interlocked.Increment(ref _revision);
+        DispatchChanged();
+    }
+
+    private void RebuildItems()
+    {
+        var items = new List<ShortcutEntry>(SlotCount);
+        for (int i = 0; i < _entries.Length; i++)
+        {
+            if (_entries[i] is ShortcutEntry entry)
+                items.Add(entry);
+        }
+        Volatile.Write(ref _items, items.ToArray());
+    }
+
+    private void DispatchChanged()
+    {
+        Delegate[] observers = _changed?.GetInvocationList() ?? [];
+        foreach (Delegate observer in observers)
+        {
+            try
+            {
+                ((Action)observer)();
+            }
+            catch (Exception error)
+            {
+                Interlocked.Increment(ref _dispatchFailureCount);
+                LastDispatchFailure = error;
+            }
+        }
     }
 }

src/AcDream.Core/Spells/Spellbook.cs

@@ -401,11 +401,25 @@ public sealed class Spellbook
 
     public void SetDesiredComponent(uint componentId, uint amount)
     {
-        uint current = _desiredComponents.TryGetValue(componentId, out uint existing)
-            ? existing : 0u;
-        if (current == amount) return;
-        if (amount == 0) _desiredComponents.Remove(componentId);
-        else _desiredComponents[componentId] = amount;
+        bool exists = _desiredComponents.TryGetValue(
+            componentId,
+            out uint current);
+        if (exists && current == amount) return;
+        // PlayerModule::SetDesiredCompLevel @ 0x005D4940 retains zero as a
+        // real table value; only ClearDesiredCompList destroys the entry set.
+        _desiredComponents[componentId] = amount;
+        DesiredComponentsChanged?.Invoke();
+        StateChanged?.Invoke();
+    }
+
+    /// <summary>
+    /// Destroy the complete desired-component list, matching
+    /// <c>PlayerModule::ClearDesiredCompList @ 0x005D2A00</c>.
+    /// </summary>
+    public void ClearDesiredComponents()
+    {
+        if (_desiredComponents.Count == 0) return;
+        _desiredComponents.Clear();
         DesiredComponentsChanged?.Invoke();
         StateChanged?.Invoke();
     }

src/AcDream.Runtime/Gameplay/RuntimeCharacterState.cs

@@ -1,9 +1,41 @@
 using AcDream.Core.Player;
 using AcDream.Core.Net.Messages;
 using AcDream.Core.Spells;
+using AcDream.Core.Items;
 
 namespace AcDream.Runtime.Gameplay;
 
+public readonly record struct RuntimeCharacterOwnershipSnapshot(
+    bool IsDisposed,
+    bool InternalSubscriptionsAttached,
+    int LearnedSpellCount,
+    int ActiveEnchantmentCount,
+    int DesiredComponentCount,
+    int FavoriteSpellCount,
+    int VitalCount,
+    int AttributeCount,
+    int SkillCount,
+    int PositionCount,
+    int PropertyCount,
+    bool OptionsAreDefaults,
+    bool MovementSkillsAreReset)
+{
+    public bool IsConverged =>
+        IsDisposed
+        && !InternalSubscriptionsAttached
+        && LearnedSpellCount == 0
+        && ActiveEnchantmentCount == 0
+        && DesiredComponentCount == 0
+        && FavoriteSpellCount == 0
+        && VitalCount == 0
+        && AttributeCount == 0
+        && SkillCount == 0
+        && PositionCount == 0
+        && PropertyCount == 0
+        && OptionsAreDefaults
+        && MovementSkillsAreReset;
+}
+
 /// <summary>
 /// Canonical presentation-independent owner for the local character's magic
 /// and player-sheet state. The two objects form one lifetime group because
@@ -14,6 +46,7 @@ public sealed class RuntimeCharacterState : IDisposable
     private bool _disposed;
     private long _characterRevision;
     private long _spellbookRevision;
+    private bool _internalSubscriptionsAttached;
 
     public RuntimeCharacterState(SpellTable? spellTable = null)
     {
@@ -26,6 +59,7 @@ public sealed class RuntimeCharacterState : IDisposable
         LocalPlayer.Changed += OnVitalChanged;
         LocalPlayer.AttributeChanged += OnAttributeChanged;
         LocalPlayer.CharacterChanged += OnCharacterChanged;
+        _internalSubscriptionsAttached = true;
     }
 
     public Spellbook Spellbook { get; }
@@ -35,6 +69,57 @@ public sealed class RuntimeCharacterState : IDisposable
     public IRuntimeCharacterView View { get; }
     public bool IsDisposed => _disposed;
 
+    public RuntimeCharacterOwnershipSnapshot CaptureOwnership()
+    {
+        int favoriteCount = 0;
+        for (int tab = 0; tab < 8; tab++)
+            favoriteCount += Spellbook.GetFavorites(tab).Count;
+
+        int vitalCount = 0;
+        foreach (LocalPlayerState.VitalKind kind
+            in Enum.GetValues<LocalPlayerState.VitalKind>())
+        {
+            if (LocalPlayer.Get(kind) is not null)
+                vitalCount++;
+        }
+
+        int attributeCount = 0;
+        foreach (LocalPlayerState.AttributeKind kind
+            in Enum.GetValues<LocalPlayerState.AttributeKind>())
+        {
+            if (LocalPlayer.GetAttribute(kind) is not null)
+                attributeCount++;
+        }
+
+        PropertyBundle properties = LocalPlayer.Properties;
+        int propertyCount =
+            properties.Bools.Count
+            + properties.Ints.Count
+            + properties.Int64s.Count
+            + properties.Floats.Count
+            + properties.Strings.Count
+            + properties.DataIds.Count
+            + properties.InstanceIds.Count;
+        RuntimeCharacterOptionsSnapshot options = Options.Snapshot;
+        return new RuntimeCharacterOwnershipSnapshot(
+            _disposed,
+            _internalSubscriptionsAttached,
+            Spellbook.LearnedCount,
+            Spellbook.ActiveCount,
+            Spellbook.DesiredComponents.Count,
+            favoriteCount,
+            vitalCount,
+            attributeCount,
+            LocalPlayer.Skills.Count,
+            LocalPlayer.Positions.Count,
+            propertyCount,
+            options.Options1 == RuntimeCharacterOptionsState.DefaultOptions1
+                && options.Options2
+                    == RuntimeCharacterOptionsState.DefaultOptions2,
+            MovementSkills.RunSkill == -1
+                && MovementSkills.JumpSkill == -1);
+    }
+
     /// <summary>
     /// Installs immutable DAT metadata without transferring its ownership to
     /// Runtime. The content host may install one table after portal.dat opens.
@@ -57,6 +142,93 @@ public sealed class RuntimeCharacterState : IDisposable
         LocalPlayer.Clear();
     }
 
+    /// <summary>
+    /// Apply retail's local favorite insertion before sending the matching
+    /// character event.
+    /// </summary>
+    public bool TryAddFavorite(
+        int tabIndex,
+        int position,
+        uint spellId,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if ((uint)tabIndex >= 8u || position < 0 || spellId == 0u)
+            return false;
+        Spellbook.SetFavorite(tabIndex, position, spellId);
+        publishOutbound();
+        return true;
+    }
+
+    public bool TryRemoveFavorite(
+        int tabIndex,
+        uint spellId,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if ((uint)tabIndex >= 8u || spellId == 0u)
+            return false;
+        Spellbook.RemoveFavorite(tabIndex, spellId);
+        publishOutbound();
+        return true;
+    }
+
+    /// <summary>
+    /// Apply and publish a spellbook filter only when it differs, matching
+    /// <c>gmSpellbookUI::UpdateFilter @ 0x0048B5E0</c>.
+    /// </summary>
+    public void SetSpellbookFilter(
+        uint filters,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if (Spellbook.SpellbookFilters == filters)
+            return;
+        Spellbook.SetSpellbookFilters(filters);
+        publishOutbound();
+    }
+
+    /// <summary>
+    /// Retail publishes the desired-component event before changing its local
+    /// PlayerModule table.
+    /// </summary>
+    public bool TrySetDesiredComponent(
+        uint componentId,
+        uint amount,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if (componentId == 0u || amount > 5000u)
+            return false;
+        try
+        {
+            publishOutbound();
+        }
+        finally
+        {
+            Spellbook.SetDesiredComponent(componentId, amount);
+        }
+        return true;
+    }
+
+    public void ClearDesiredComponents(Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        try
+        {
+            publishOutbound();
+        }
+        finally
+        {
+            Spellbook.ClearDesiredComponents();
+        }
+    }
+
     /// <summary>
     /// Clears both coupled owners while retaining every failed suffix for a
     /// retry. State mutation happens before the existing synchronous
@@ -82,13 +254,33 @@ public sealed class RuntimeCharacterState : IDisposable
     {
         if (_disposed)
             return;
-        ResetSession();
+        List<Exception>? failures = null;
+        try
+        {
+            // Do not call ResetSession as one opaque step here. Terminal
+            // disposal must run every suffix even when an external UI observer
+            // throws from one Core owner's synchronous clear notification.
+            Try(Spellbook.Clear, ref failures);
+            Try(LocalPlayer.Clear, ref failures);
+            Try(Options.ResetSession, ref failures);
+            Try(MovementSkills.ResetSession, ref failures);
+        }
+        finally
+        {
             Spellbook.StateChanged -= OnSpellbookChanged;
             LocalPlayer.Changed -= OnVitalChanged;
             LocalPlayer.AttributeChanged -= OnAttributeChanged;
             LocalPlayer.CharacterChanged -= OnCharacterChanged;
+            _internalSubscriptionsAttached = false;
             _disposed = true;
         }
+        if (failures is not null)
+        {
+            throw new AggregateException(
+                "Runtime character state did not converge during disposal.",
+                failures);
+        }
+    }
 
     private void OnSpellbookChanged() =>
         Interlocked.Increment(ref _spellbookRevision);

src/AcDream.Runtime/Gameplay/RuntimeCommunicationState.cs

@@ -17,6 +17,36 @@ public interface IRuntimeCommunicationEventSource
     IDisposable Subscribe(IRuntimeCommunicationObserver observer);
 }
 
+public readonly record struct RuntimeCommunicationOwnershipSnapshot(
+    bool IsDisposed,
+    bool CommandTargetsDisposed,
+    int StreamSubscriberCount,
+    int PendingDispatchCount,
+    bool IsDispatching,
+    int FriendCount,
+    int SquelchAccountCount,
+    int SquelchCharacterCount,
+    int SquelchGlobalTypeCount,
+    int NegotiatedRoomCount,
+    bool HasReplyTarget,
+    bool HasRetellTarget,
+    long DispatchFailureCount)
+{
+    public bool IsConverged =>
+        IsDisposed
+        && CommandTargetsDisposed
+        && StreamSubscriberCount == 0
+        && PendingDispatchCount == 0
+        && !IsDispatching
+        && FriendCount == 0
+        && SquelchAccountCount == 0
+        && SquelchCharacterCount == 0
+        && SquelchGlobalTypeCount == 0
+        && NegotiatedRoomCount == 0
+        && !HasReplyTarget
+        && !HasRetellTarget;
+}
+
 /// <summary>
 /// Canonical presentation-independent owner for communication and social
 /// state. Graphical, headless, plugin, and bot hosts borrow these exact
@@ -59,6 +89,25 @@ public sealed class RuntimeCommunicationState : IDisposable
     public long DispatchFailureCount => _events.DispatchFailureCount;
     public Exception? LastDispatchFailure => _events.LastDispatchFailure;
 
+    public RuntimeCommunicationOwnershipSnapshot CaptureOwnership()
+    {
+        SquelchDatabase squelch = Squelch.Snapshot();
+        return new RuntimeCommunicationOwnershipSnapshot(
+            _disposed,
+            CommandTargets.IsDisposed,
+            SubscriberCount,
+            PendingDispatchCount,
+            IsDispatching,
+            Friends.Count,
+            squelch.Accounts.Count,
+            squelch.Characters.Count,
+            squelch.Global.MessageTypes.Count,
+            CountRooms(TurbineChat),
+            CommandTargets.LastIncomingTellSender is not null,
+            CommandTargets.LastOutgoingTellTarget is not null,
+            DispatchFailureCount);
+    }
+
     public void ResetCommandTargets() => CommandTargets.ResetSession();
     public void ResetChatIdentity() => Chat.ResetSessionIdentity();
     public void ResetNegotiatedChannels() => TurbineChat.Reset();
@@ -126,6 +175,8 @@ public sealed class RuntimeCommunicationState : IDisposable
             return true;
         }
 
+    }
+
     private static int CountRooms(TurbineChatState state)
     {
         int count = 0;
@@ -139,7 +190,6 @@ public sealed class RuntimeCommunicationState : IDisposable
         return count;
     }
 }
-}
 
 internal sealed class RuntimeCommunicationEventStream
     : IRuntimeCommunicationEventSource,

src/AcDream.Runtime/Gameplay/RuntimeGameplayOwnership.cs

@@ -0,0 +1,34 @@
+namespace AcDream.Runtime.Gameplay;
+
+/// <summary>
+/// One allocation-free ledger over the complete J4 gameplay-state lifetime
+/// group. It contains no state of its own; graphical and no-window hosts
+/// capture the same three canonical owners.
+/// </summary>
+public readonly record struct RuntimeGameplayOwnershipSnapshot(
+    RuntimeInventoryOwnershipSnapshot Inventory,
+    RuntimeCharacterOwnershipSnapshot Character,
+    RuntimeCommunicationOwnershipSnapshot Communication)
+{
+    public bool IsConverged =>
+        Inventory.IsConverged
+        && Character.IsConverged
+        && Communication.IsConverged;
+}
+
+public static class RuntimeGameplayOwnership
+{
+    public static RuntimeGameplayOwnershipSnapshot Capture(
+        RuntimeInventoryState inventory,
+        RuntimeCharacterState character,
+        RuntimeCommunicationState communication)
+    {
+        ArgumentNullException.ThrowIfNull(inventory);
+        ArgumentNullException.ThrowIfNull(character);
+        ArgumentNullException.ThrowIfNull(communication);
+        return new RuntimeGameplayOwnershipSnapshot(
+            inventory.CaptureOwnership(),
+            character.CaptureOwnership(),
+            communication.CaptureOwnership());
+    }
+}

src/AcDream.Runtime/Gameplay/RuntimeInventoryState.cs

@@ -3,6 +3,33 @@ using AcDream.Runtime.Entities;
 
 namespace AcDream.Runtime.Gameplay;
 
+public readonly record struct RuntimeInventoryOwnershipSnapshot(
+    bool IsDisposed,
+    bool TransactionsDisposed,
+    bool ShortcutsDisposed,
+    int BusyCount,
+    bool HasPendingRequest,
+    uint RequestedContainerId,
+    uint CurrentContainerId,
+    int ItemManaCount,
+    int ShortcutCount,
+    int ShortcutSubscriberCount,
+    long ShortcutDispatchFailureCount,
+    long TransactionDispatchFailureCount)
+{
+    public bool IsConverged =>
+        IsDisposed
+        && TransactionsDisposed
+        && ShortcutsDisposed
+        && BusyCount == 0
+        && !HasPendingRequest
+        && RequestedContainerId == 0u
+        && CurrentContainerId == 0u
+        && ItemManaCount == 0
+        && ShortcutCount == 0
+        && ShortcutSubscriberCount == 0;
+}
+
 /// <summary>
 /// Canonical presentation-independent owner for inventory gameplay state.
 /// The object collection is borrowed directly from J3's entity/object
@@ -19,7 +46,7 @@ public sealed class RuntimeInventoryState : IDisposable
             ?? throw new ArgumentNullException(nameof(entityObjects));
         ExternalContainers = new ExternalContainerState();
         ItemMana = new ItemManaState();
-        Shortcuts = new ShortcutState();
+        Shortcuts = new ShortcutStore();
         Transactions = new InventoryTransactionState(_entityObjects.Objects);
         View = new InventoryStateView(this);
     }
@@ -27,11 +54,25 @@ public sealed class RuntimeInventoryState : IDisposable
     public ClientObjectTable Objects => _entityObjects.Objects;
     public ExternalContainerState ExternalContainers { get; }
     public ItemManaState ItemMana { get; }
-    public ShortcutState Shortcuts { get; }
+    public ShortcutStore Shortcuts { get; }
     public InventoryTransactionState Transactions { get; }
     public IRuntimeInventoryStateView View { get; }
     public bool IsDisposed => _disposed;
 
+    public RuntimeInventoryOwnershipSnapshot CaptureOwnership() => new(
+        _disposed,
+        Transactions.IsDisposed,
+        Shortcuts.IsDisposed,
+        Transactions.BusyCount,
+        Transactions.HasPendingRequest,
+        ExternalContainers.RequestedContainerId,
+        ExternalContainers.CurrentContainerId,
+        ItemMana.Count,
+        Shortcuts.Count,
+        Shortcuts.SubscriberCount,
+        Shortcuts.DispatchFailureCount,
+        Transactions.DispatchFailureCount);
+
     public void ResetExternalContainer() => ExternalContainers.Reset();
     public void ResetTransactions() => Transactions.ResetSession();
     public void ResetItemMana() => ItemMana.Clear();
@@ -41,20 +82,82 @@ public sealed class RuntimeInventoryState : IDisposable
         Shortcuts.Clear();
     }
 
+    /// <summary>
+    /// Send and apply one retail toolbar add on the canonical shortcut
+    /// manager. Retail emits <c>Event_AddShortCut</c> before mutating
+    /// <c>PlayerModule</c>.
+    /// </summary>
+    public bool TryAddShortcut(
+        ShortcutEntry entry,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if ((uint)entry.Index >= ShortcutStore.SlotCount
+            || (entry.ObjectId == 0u && entry.SpellId == 0u))
+        {
+            return false;
+        }
+
+        try
+        {
+            publishOutbound();
+        }
+        finally
+        {
+            Shortcuts.Set(entry);
+        }
+        return true;
+    }
+
+    /// <summary>
+    /// Send and apply one retail toolbar removal on the canonical shortcut
+    /// manager.
+    /// </summary>
+    public bool TryRemoveShortcut(
+        int index,
+        Action publishOutbound)
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+        ArgumentNullException.ThrowIfNull(publishOutbound);
+        if ((uint)index >= ShortcutStore.SlotCount)
+            return false;
+
+        try
+        {
+            publishOutbound();
+        }
+        finally
+        {
+            Shortcuts.Remove(index);
+        }
+        return true;
+    }
+
     public void Dispose()
     {
         if (_disposed)
             return;
         List<Exception>? failures = null;
+        try
+        {
             Try(() => ExternalContainers.Reset(), ref failures);
             Try(ItemMana.Clear, ref failures);
-        Try(Shortcuts.Clear, ref failures);
+            Try(Shortcuts.Dispose, ref failures);
             Try(Transactions.Dispose, ref failures);
+        }
+        finally
+        {
+            // Disposal is terminal even when a borrowed presentation observer
+            // fails. Every owned leaf above mutates before dispatching, so the
+            // full suffix is safe to run and the Runtime root must never remain
+            // half-alive over already-disposed children.
+            _disposed = true;
+        }
         if (failures is not null)
             throw new AggregateException(
                 "Runtime inventory state did not converge during disposal.",
                 failures);
-        _disposed = true;
     }
 
     private static void Try(Action action, ref List<Exception>? failures)
@@ -93,7 +196,7 @@ public sealed class RuntimeInventoryState : IDisposable
                     owner.Transactions.BusyCount,
                     owner.Transactions.CanBeginRequest,
                     pending,
-                    owner.Shortcuts.Items.Count,
+                    owner.Shortcuts.Count,
                     owner.Shortcuts.Revision,
                     owner.ItemMana.Count,
                     owner.ItemMana.Revision);
@@ -124,22 +227,3 @@ public sealed class RuntimeInventoryState : IDisposable
             owner.ItemMana.TryGetManaPercent(objectId, out fraction);
     }
 }
-
-public sealed class ShortcutState
-{
-    private IReadOnlyList<ShortcutEntry> _items = Array.Empty<ShortcutEntry>();
-    private long _revision;
-
-    public IReadOnlyList<ShortcutEntry> Items => Volatile.Read(ref _items);
-    public long Revision => Interlocked.Read(ref _revision);
-
-    public void Replace(IReadOnlyList<ShortcutEntry>? items)
-    {
-        Volatile.Write(
-            ref _items,
-            items ?? Array.Empty<ShortcutEntry>());
-        Interlocked.Increment(ref _revision);
-    }
-
-    public void Clear() => Replace(Array.Empty<ShortcutEntry>());
-}

tests/AcDream.App.Tests/Interaction/SelectionInteractionControllerTests.cs

@@ -160,6 +160,7 @@ public sealed class SelectionInteractionControllerTests
             });
             Items = new ItemInteractionController(
                 Objects,
+                new InventoryTransactionState(Objects),
                 () => Player,
                 sendUse: null,
                 sendUseWithTarget: null,

tests/AcDream.App.Tests/Runtime/CurrentGameRuntimeAdapterTests.cs

@@ -371,7 +371,7 @@ public sealed class CurrentGameRuntimeAdapterTests
         harness.Character.Options.Replace(0x04000000u, 0x00948700u);
         harness.Character.MovementSkills.Update(200, 175);
         harness.Character.Spellbook.OnSpellLearned(42u);
-        harness.InventoryState.Shortcuts.Replace(
+        harness.InventoryState.Shortcuts.Load(
         [
             new ShortcutEntry(1, 0x80000001u, 0u),
         ]);
@@ -506,6 +506,20 @@ public sealed class CurrentGameRuntimeAdapterTests
             static entry => entry.Kind == RuntimeTraceKind.Command
                 && (entry.Code >> 16)
                     == (int)RuntimeCommandDomain.Social);
+        Assert.True(harness.InventoryState.View.TryGetShortcut(
+            2,
+            out RuntimeShortcutSnapshot storedShortcut));
+        Assert.Equal(0x80000001u, storedShortcut.ObjectId);
+        Assert.True(harness.Character.View.TryGetFavorite(
+            0,
+            0,
+            out uint storedFavorite));
+        Assert.Equal(42u, storedFavorite);
+        Assert.Equal(0x3FFEu, harness.Character.Spellbook.SpellbookFilters);
+        Assert.True(harness.Character.View.TryGetDesiredComponent(
+            0x68000001u,
+            out uint storedDesired));
+        Assert.Equal(10u, storedDesired);
 
         int published = harness.Commands.Published.Count;
         RuntimeCommandResult stale = commands.Character.SetOptions1(
@@ -515,6 +529,101 @@ public sealed class CurrentGameRuntimeAdapterTests
         Assert.Equal(published, harness.Commands.Published.Count);
     }
 
+    [Fact]
+    public void GraphicalAndNoWindowJ4CommandsProduceIdenticalCanonicalState()
+    {
+        using var directEntities = new RuntimeEntityObjectLifetime();
+        using var directInventory =
+            new RuntimeInventoryState(directEntities);
+        using var directCharacter = new RuntimeCharacterState();
+        using var harness = new Harness();
+        _ = harness.Runtime.Session.Start(harness.Runtime.Generation);
+        RuntimeGenerationToken generation = harness.Runtime.Generation;
+        IGameRuntimeCommands graphical = harness.Runtime;
+        var directOutbound = new List<string>();
+        var shortcut = new ShortcutEntry(2, 0x80000001u, 0u);
+
+        Assert.True(directInventory.TryAddShortcut(
+            shortcut,
+            () => directOutbound.Add("add-shortcut")));
+        Assert.True(directCharacter.TryAddFavorite(
+            0,
+            0,
+            42u,
+            () => directOutbound.Add("add-favorite")));
+        directCharacter.SetSpellbookFilter(
+            0x3FFEu,
+            () => directOutbound.Add("filter"));
+        Assert.True(directCharacter.TrySetDesiredComponent(
+            0x68000001u,
+            10u,
+            () => directOutbound.Add("desired")));
+
+        Assert.True(graphical.InventoryState.AddShortcut(
+            generation,
+            new RuntimeShortcutCommand(
+                shortcut.Index,
+                shortcut.ObjectId,
+                shortcut.SpellId)).Accepted);
+        Assert.True(graphical.Spellbook.AddFavorite(
+            generation,
+            0,
+            0,
+            42u).Accepted);
+        Assert.True(graphical.Spellbook.SetFilter(
+            generation,
+            0x3FFEu).Accepted);
+        Assert.True(graphical.Spellbook.SetDesiredComponent(
+            generation,
+            0x68000001u,
+            10u).Accepted);
+
+        Assert.Equal(
+            directInventory.View.Snapshot,
+            harness.InventoryState.View.Snapshot);
+        Assert.Equal(
+            directCharacter.View.Snapshot,
+            harness.Character.View.Snapshot);
+        Assert.Equal(
+            directInventory.Shortcuts.Items,
+            harness.InventoryState.Shortcuts.Items);
+        Assert.Equal(
+            directCharacter.Spellbook.GetFavorites(0),
+            harness.Character.Spellbook.GetFavorites(0));
+        Assert.Equal(
+            ["add-shortcut", "add-favorite", "filter", "desired"],
+            directOutbound);
+
+        Assert.True(directInventory.TryRemoveShortcut(
+            2,
+            () => directOutbound.Add("remove-shortcut")));
+        Assert.True(directCharacter.TryRemoveFavorite(
+            0,
+            42u,
+            () => directOutbound.Add("remove-favorite")));
+        directCharacter.ClearDesiredComponents(
+            () => directOutbound.Add("clear-desired"));
+        Assert.True(graphical.InventoryState.RemoveShortcut(
+            generation,
+            2).Accepted);
+        Assert.True(graphical.Spellbook.RemoveFavorite(
+            generation,
+            0,
+            42u).Accepted);
+        Assert.True(graphical.Spellbook.ClearDesiredComponents(
+            generation).Accepted);
+
+        Assert.Equal(
+            directInventory.View.Snapshot,
+            harness.InventoryState.View.Snapshot);
+        Assert.Equal(
+            directCharacter.View.Snapshot,
+            harness.Character.View.Snapshot);
+        Assert.Empty(harness.InventoryState.Shortcuts.Items);
+        Assert.Empty(harness.Character.Spellbook.GetFavorites(0));
+        Assert.Empty(harness.Character.Spellbook.DesiredComponents);
+    }
+
     private static ClientObject Object(WorldSession.EntitySpawn spawn) => new()
     {
         ObjectId = spawn.Guid,
@@ -587,6 +696,7 @@ public sealed class CurrentGameRuntimeAdapterTests
 
             _items = new ItemInteractionController(
                 Objects,
+                InventoryState.Transactions,
                 () => PlayerGuid,
                 sendUse: null,
                 sendUseWithTarget: null,

tests/AcDream.App.Tests/Runtime/RuntimeInventoryOwnershipTests.cs

@@ -41,13 +41,32 @@ public sealed class RuntimeInventoryOwnershipTests
             "InteractionRetainedUiComposition.cs");
         string session = ReadSource("Net", "LiveSessionRuntimeFactory.cs");
         string shutdown = ReadSource("Rendering", "GameWindowLifetime.cs");
+        string itemInteraction = ReadSource(
+            "UI",
+            "ItemInteractionController.cs");
 
         Assert.Contains(
-            "transactions: d.Inventory.Transactions",
+            "d.Inventory.Transactions",
             ui,
             StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "new InventoryTransactionState(d.Inventory.Objects)",
+            ui,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "new InventoryTransactionState",
+            itemInteraction,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "_ownsTransactions",
+            itemInteraction,
+            StringComparison.Ordinal);
         Assert.Contains(
-            "OnShortcuts: _domain.Inventory.Shortcuts.Replace",
+            "InventoryTransactionState transactions,",
+            itemInteraction,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "OnShortcuts: _domain.Inventory.Shortcuts.Load",
             session,
             StringComparison.Ordinal);
         Assert.Contains(
@@ -64,6 +83,73 @@ public sealed class RuntimeInventoryOwnershipTests
             "\"runtime entity/object lifetime\"");
     }
 
+    [Fact]
+    public void ToolbarBorrowsRuntimeShortcutManagerWithoutAProviderOrMirror()
+    {
+        string toolbar = ReadSource(
+            "UI",
+            "Layout",
+            "ToolbarController.cs");
+        string ui = ReadSource(
+            "Composition",
+            "InteractionRetainedUiComposition.cs");
+
+        Assert.Contains(
+            "private readonly ShortcutStore _store;",
+            toolbar,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "_store = shortcuts ?? throw",
+            toolbar,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "new ShortcutStore()",
+            toolbar,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "Func<IReadOnlyList<ShortcutEntry>>",
+            toolbar,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "_storeLoaded",
+            toolbar,
+            StringComparison.Ordinal);
+        Assert.Contains(
+            "d.Inventory.Shortcuts,",
+            ui,
+            StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void SpellUiDoesNotApplyASecondLocalCommandMutation()
+    {
+        string spellbook = ReadSource(
+            "UI",
+            "Layout",
+            "SpellbookWindowController.cs");
+        string spellcasting = ReadSource(
+            "UI",
+            "Layout",
+            "SpellcastingUiController.cs");
+
+        Assert.DoesNotContain(
+            "_spellbook.SetSpellbookFilters(filters);",
+            spellbook,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "_spellbook.SetDesiredComponent(componentId, parsed);",
+            spellbook,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "_spellbook.SetFavorite(",
+            spellcasting,
+            StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "_spellbook.RemoveFavorite(",
+            spellcasting,
+            StringComparison.Ordinal);
+    }
+
     private static string ReadSource(params string[] relative)
     {
         string root = FindRepositoryRoot();

tests/AcDream.App.Tests/UI/CursorFeedbackControllerTests.cs

@@ -153,6 +153,7 @@ public sealed class CursorFeedbackControllerTests
         var objects = SeedTargetObjects();
         var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -188,6 +189,7 @@ public sealed class CursorFeedbackControllerTests
         objects.Get(Source)!.TargetType = (uint)ItemType.Misc;   // a tool that targets items
         var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -226,6 +228,7 @@ public sealed class CursorFeedbackControllerTests
         var objects = SeedTargetObjects();
         var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -254,6 +257,7 @@ public sealed class CursorFeedbackControllerTests
         var objects = SeedTargetObjects();
         var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/ItemInteractionControllerTests.cs

@@ -31,7 +31,7 @@ public sealed class ItemInteractionControllerTests
         public readonly List<CombatMode> CombatModeRequests = new();
         public readonly CombatState Combat = new();
         public readonly StackSplitQuantityState SplitQuantity = new();
-        public readonly InventoryTransactionState? SharedTransactions;
+        public readonly InventoryTransactionState SharedTransactions;
         public uint SelectedObject;
         public bool NonCombatMode;
         public bool DragOnPlayerOpensSecureTrade = true;
@@ -39,8 +39,7 @@ public sealed class ItemInteractionControllerTests
         public long Now = 1_000;
 
         public Harness(
-            Action<uint, ItemUseRequestReservation>? requestUse = null,
-            bool sharedTransactions = false)
+            Action<uint, ItemUseRequestReservation>? requestUse = null)
         {
             Objects.AddOrUpdate(new ClientObject
             {
@@ -56,12 +55,11 @@ public sealed class ItemInteractionControllerTests
                 ItemsCapacity = 24,
             });
             Objects.MoveItem(Pack, Player, 0);
-            SharedTransactions = sharedTransactions
-                ? new InventoryTransactionState(Objects)
-                : null;
+            SharedTransactions = new InventoryTransactionState(Objects);
 
             Controller = new ItemInteractionController(
                 Objects,
+                SharedTransactions,
                 playerGuid: () => Player,
                 sendUse: requestUse is null ? Uses.Add : null,
                 sendExamine: Examines.Add,
@@ -91,8 +89,7 @@ public sealed class ItemInteractionControllerTests
                 },
                 combatState: Combat,
                 sendChangeCombatMode: CombatModeRequests.Add,
-                requestUse: requestUse,
-                transactions: SharedTransactions);
+                requestUse: requestUse);
         }
 
         public ItemInteractionController Controller { get; }
@@ -321,11 +318,11 @@ public sealed class ItemInteractionControllerTests
     [Fact]
     public void BorrowedTransactionOwnerIsExactAndOutlivesController()
     {
-        var h = new Harness(sharedTransactions: true);
+        var h = new Harness();
 
         h.Controller.IncrementBusyCount();
 
-        Assert.Equal(1, h.SharedTransactions!.BusyCount);
+        Assert.Equal(1, h.SharedTransactions.BusyCount);
         h.Controller.Dispose();
         Assert.False(h.SharedTransactions.IsDisposed);
 
@@ -343,12 +340,12 @@ public sealed class ItemInteractionControllerTests
 
         Assert.Throws<ArgumentException>(() => new ItemInteractionController(
             objects,
+            transactions,
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
             sendWield: null,
-            sendDrop: null,
-            transactions: transactions));
+            sendDrop: null));
     }
 
     [Fact]

tests/AcDream.App.Tests/UI/Layout/AppraisalUiControllerTests.cs

@@ -858,6 +858,7 @@ public sealed class AppraisalUiControllerTests
         List<uint> sent)
         => new(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => 0x50000002u,
             sendUse: null,
             sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/Layout/ExternalContainerControllerTests.cs

@@ -106,6 +106,7 @@ public sealed class ExternalContainerControllerTests
 
             Interaction = new ItemInteractionController(
                 Objects,
+                new InventoryTransactionState(Objects),
                 playerGuid: () => Player,
                 sendUse: Uses.Add,
                 sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/Layout/InventoryControllerTests.cs

@@ -508,6 +508,7 @@ public class InventoryControllerTests
         var appraisals = new List<uint>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -544,6 +545,7 @@ public class InventoryControllerTests
         objects.Get(0xA)!.Useability = 0x000A0008u;
         var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -712,6 +714,7 @@ public class InventoryControllerTests
         var pickups = new List<(uint item, uint container, int placement)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -756,6 +759,7 @@ public class InventoryControllerTests
         var eventOrder = new List<(string Kind, uint Item, ulong Token)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -807,6 +811,7 @@ public class InventoryControllerTests
         var eventOrder = new List<(string Kind, uint Item)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -864,6 +869,7 @@ public class InventoryControllerTests
         var messages = new List<string>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -932,6 +938,7 @@ public class InventoryControllerTests
         var messages = new List<string>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -994,6 +1001,7 @@ public class InventoryControllerTests
         var merges = new List<(uint Source, uint Target, uint Amount)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -1053,6 +1061,7 @@ public class InventoryControllerTests
         var splits = new List<(uint Item, uint Container, uint Placement, uint Amount)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -1099,6 +1108,7 @@ public class InventoryControllerTests
         var puts = new List<(uint Item, uint Container, int Placement)>();
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -1138,6 +1148,7 @@ public class InventoryControllerTests
         SeedContained(objects, loot, chest, slot: 0, type: ItemType.Misc);
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -1176,6 +1187,7 @@ public class InventoryControllerTests
         SeedContained(objects, loot, chest, slot: 0, type: ItemType.Misc);
         using var interaction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: null,
             sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/Layout/PaperdollControllerTests.cs

@@ -52,6 +52,7 @@ public class PaperdollControllerTests
     {
         var itemInteraction = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             () => Player,
             sendUse: null,
             sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/Layout/SpellbookWindowControllerTests.cs

@@ -413,10 +413,18 @@ public sealed class SpellbookWindowControllerTests
             spellId => spellId == 103u ? 8 : 1,
             selectObject ?? (_ => { }),
             addFavorite ?? (_ => { }),
-            sendFilter ?? (_ => { }),
+            filters =>
+            {
+                spellbook.SetSpellbookFilters(filters);
+                sendFilter?.Invoke(filters);
+            },
             removeSpell ?? (_ => { }),
             showConfirmation ?? ((_, _) => { }),
-            setDesiredComponent ?? ((_, _) => { }),
+            (componentId, amount) =>
+            {
+                spellbook.SetDesiredComponent(componentId, amount);
+                setDesiredComponent?.Invoke(componentId, amount);
+            },
             close ?? (() => { }),
             new ComponentBookTemplateFactory(
                 FixtureLoader.LoadComponentCategoryTemplateInfos(),

tests/AcDream.App.Tests/UI/Layout/SpellcastingUiControllerTests.cs

@@ -338,8 +338,12 @@ public sealed class SpellcastingUiControllerTests
             item => item.ObjectId,
             useItem,
             selection ?? new SelectionState(),
-            addFavorite ?? ((_, _, _) => { }),
-            (_, _) => { },
+            (tab, position, spellId) =>
+            {
+                spellbook.SetFavorite(tab, position, spellId);
+                addFavorite?.Invoke(tab, position, spellId);
+            },
+            (tab, spellId) => spellbook.RemoveFavorite(tab, spellId),
             shortcutDigits,
             emptySlotSprite,
             examineSpell);

tests/AcDream.App.Tests/UI/Layout/ToolbarControllerTests.cs

@@ -34,6 +34,14 @@ public class ToolbarControllerTests
         (InventoryButtonId, RetailPanelCatalog.Inventory),
     };
 
+    private static ShortcutStore Store(
+        IEnumerable<ShortcutEntry> shortcuts)
+    {
+        var store = new ShortcutStore();
+        store.Load(shortcuts);
+        return store;
+    }
+
     private static (ImportedLayout layout, Dictionary<uint, UiItemList> slots,
                     Dictionary<uint, UiElement> indicators) FakeToolbar()
     {
@@ -108,7 +116,7 @@ public class ToolbarControllerTests
         var shortcuts = new List<ShortcutEntry>
         { new(Index: 0, ObjectId: 0x5001u, SpellId: 0) };
 
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u, useItem: _ => { });
 
         Assert.Equal(0x5001u, slots[Row1[0]].Cell.ItemId);
@@ -134,7 +142,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => shortcuts,
+            Store(shortcuts),
             iconIds: (_, _, _, _, _) => 0x77u,
             useItem: _ => { });
         Assert.Equal(0x5001u, slots[Row1[0]].Cell.ItemId);
@@ -152,7 +160,7 @@ public class ToolbarControllerTests
         var shortcuts = new List<ShortcutEntry>
         { new(Index: 2, ObjectId: 0x5002u, SpellId: 0) };
 
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x88u, useItem: _ => { });
         Assert.Equal(0u, slots[Row1[2]].Cell.ItemId); // not bound yet
 
@@ -168,7 +176,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
         var shortcuts = new List<ShortcutEntry>
         { new(Index: 2, ObjectId: 0x5002u, SpellId: 0) };
-        var controller = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var controller = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x88u, useItem: _ => { });
 
         controller.Dispose();
@@ -194,7 +202,7 @@ public class ToolbarControllerTests
         uint used = 0;
         var selection = new SelectionState();
 
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u,
             useItem: g => used = g,
             selection: selection);
@@ -217,7 +225,7 @@ public class ToolbarControllerTests
         var toggles = new List<uint>();
 
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
         ctrl.BindPanelButtons(
             panelId => panelId is RetailPanelCatalog.Inventory or RetailPanelCatalog.Character,
@@ -257,6 +265,7 @@ public class ToolbarControllerTests
         var useWithTarget = new List<(uint Source, uint Target)>();
         var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             playerGuid: () => player,
             sendUse: null,
             sendUseWithTarget: (source, target) => useWithTarget.Add((source, target)),
@@ -266,7 +275,7 @@ public class ToolbarControllerTests
         int inventoryClicks = 0;
 
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u,
             useItem: _ => { },
             itemInteraction: interaction);
@@ -293,7 +302,7 @@ public class ToolbarControllerTests
         repo.AddOrUpdate(new ClientObject { ObjectId = item, Type = ItemType.Misc });
         var puts = new List<(uint Item, uint Container, int Placement)>();
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             playerGuid: () => player,
@@ -322,6 +331,7 @@ public class ToolbarControllerTests
         var directPuts = new List<(uint Item, uint Container, int Placement)>();
         using var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             playerGuid: () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -331,7 +341,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: static (_, _, _, _, _) => 0u,
             useItem: static _ => { },
             itemInteraction: interaction,
@@ -370,6 +380,7 @@ public class ToolbarControllerTests
         var messages = new List<string>();
         using var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             playerGuid: () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -379,7 +390,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: static (_, _, _, _, _) => 0u,
             useItem: static _ => { },
             itemInteraction: interaction,
@@ -411,7 +422,7 @@ public class ToolbarControllerTests
         repo.AddOrUpdate(new ClientObject { ObjectId = item, Type = ItemType.Misc });
         var puts = new List<(uint Item, uint Container, int Placement)>();
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             playerGuid: () => player,
@@ -432,7 +443,7 @@ public class ToolbarControllerTests
         var (layout, _, _) = FakeToolbar();
         var repo = new ClientObjectTable();
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
         var inventoryButton = (UiButton)layout.FindElement(InventoryButtonId)!;
         var characterButton = (UiButton)layout.FindElement(CharacterButtonId)!;
@@ -498,6 +509,7 @@ public class ToolbarControllerTests
         uint selected = item;
         var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             () => player,
             sendUse: uses.Add,
             sendUseWithTarget: null,
@@ -507,7 +519,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             itemInteraction: interaction,
@@ -555,6 +567,7 @@ public class ToolbarControllerTests
         var selection = new SelectionState();
         using var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -563,7 +576,7 @@ public class ToolbarControllerTests
         using var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             itemInteraction: interaction,
@@ -619,6 +632,7 @@ public class ToolbarControllerTests
         var wields = new List<(uint Item, uint Location)>();
         using var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -627,7 +641,7 @@ public class ToolbarControllerTests
         using var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             itemInteraction: interaction,
@@ -670,7 +684,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             playerGuid: () => player);
@@ -709,7 +723,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             playerGuid: () => player);
@@ -731,7 +745,7 @@ public class ToolbarControllerTests
         ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 0u,
             useItem: _ => { },
             toggleCombat: () => toggles++);
@@ -758,7 +772,7 @@ public class ToolbarControllerTests
         var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => shortcuts,
+            Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: id => used = id,
             selectItem: id => selected = id);
@@ -784,6 +798,7 @@ public class ToolbarControllerTests
         var appraisals = new List<uint>();
         using var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             playerGuid: () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -793,7 +808,7 @@ public class ToolbarControllerTests
         using var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => shortcuts,
+            Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             itemInteraction: interaction,
@@ -832,6 +847,7 @@ public class ToolbarControllerTests
         uint sentTarget = 0;
         var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             () => player,
             sendUse: null,
             sendUseWithTarget: (s, t) => (sentSource, sentTarget) = (s, t),
@@ -845,7 +861,7 @@ public class ToolbarControllerTests
         var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => shortcuts,
+            Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             itemInteraction: interaction);
@@ -873,6 +889,7 @@ public class ToolbarControllerTests
         repo.MoveItem(item, pack, 0);
         var interaction = new ItemInteractionController(
             repo,
+            new InventoryTransactionState(repo),
             () => player,
             sendUse: null,
             sendUseWithTarget: null,
@@ -882,7 +899,7 @@ public class ToolbarControllerTests
         var controller = ToolbarController.Bind(
             layout,
             repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             itemInteraction: interaction,
@@ -908,7 +925,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) =>0u, useItem: _ => { });
 
         // Only peace indicator (index 0 = 0x10000192) is visible.
@@ -928,7 +945,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) =>0u, useItem: _ => { });
 
         ctrl.SetCombatMode(CombatMode.Melee);
@@ -950,7 +967,7 @@ public class ToolbarControllerTests
         var combat = new CombatState();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) =>0u, useItem: _ => { },
             combatState: combat);
 
@@ -989,7 +1006,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted);
 
@@ -1018,7 +1035,7 @@ public class ToolbarControllerTests
         var (layout, slots, _) = FakeToolbar();
         var repo = new ClientObjectTable();
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted);
 
@@ -1046,7 +1063,7 @@ public class ToolbarControllerTests
         var (layout, slots, _) = FakeToolbar();
         var repo = new ClientObjectTable();
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted);
 
@@ -1078,7 +1095,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted);
 
@@ -1100,7 +1117,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted, emptyDigits: FakeEmpty);
 
@@ -1121,7 +1138,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { },
             regularDigits: FakeRegular, ghostedDigits: FakeGhosted, emptyDigits: null);
 
@@ -1147,7 +1164,7 @@ public class ToolbarControllerTests
         { new(Index: 0, ObjectId: 0x5001u, SpellId: 0) };
 
         int iconCallCount = 0;
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => { iconCallCount++; return 0x77u; }, useItem: _ => { });
 
         int callsAfterBind = iconCallCount; // 1 call from initial Populate
@@ -1172,7 +1189,7 @@ public class ToolbarControllerTests
         { new(Index: 1, ObjectId: 0x5003u, SpellId: 0) };
 
         int iconCallCount = 0;
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => { iconCallCount++; return 0x99u; }, useItem: _ => { });
 
         Assert.Equal(0, iconCallCount); // not called — item absent during initial Populate
@@ -1198,7 +1215,7 @@ public class ToolbarControllerTests
         var shortcuts = new List<ShortcutEntry>
         { new(Index: 3, ObjectId: 0x5004u, SpellId: 0) };
 
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0xAAu, useItem: _ => { });
 
         Assert.Equal(0x5004u, slots[Row1[3]].Cell.ItemId); // bound
@@ -1225,7 +1242,7 @@ public class ToolbarControllerTests
         { new(Index: 4, ObjectId: 0x5005u, SpellId: 0) };
 
         int iconCallCount = 0;
-        ToolbarController.Bind(layout, repo, () => shortcuts,
+        ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => { iconCallCount++; return 0xBBu; }, useItem: _ => { });
 
         int callsAfterBind = iconCallCount; // 1 call for the shortcut item
@@ -1247,7 +1264,7 @@ public class ToolbarControllerTests
         var repo = new ClientObjectTable();
 
         var ctrl = ToolbarController.Bind(layout, repo,
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
 
         for (int i = 0; i < Row1.Length; i++)
@@ -1272,7 +1289,7 @@ public class ToolbarControllerTests
     {
         var (layout, slots, _) = FakeToolbar();
         var ctrl = ToolbarController.Bind(layout, new ClientObjectTable(),
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
 
         var list = slots[Row1[0]];
@@ -1287,7 +1304,7 @@ public class ToolbarControllerTests
     {
         var (layout, slots, _) = FakeToolbar();
         var ctrl = ToolbarController.Bind(layout, new ClientObjectTable(),
-            () => Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
         var list = slots[Row1[0]];
         var payload = new ItemDragPayload(0u, ItemDragSource.Inventory, 0, new UiItemSlot());
@@ -1316,7 +1333,7 @@ public class ToolbarControllerTests
         var (adds, removes) = NewSpies(out var add, out var rem);
         uint selected = 0;
 
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u, useItem: _ => { },
             sendAddShortcut: add, sendRemoveShortcut: rem,
             selectItem: item => selected = item, selectedObjectId: () => selected);
@@ -1341,7 +1358,7 @@ public class ToolbarControllerTests
         { new(Index: 3, ObjectId: 0x5001u, SpellId: 0),
           new(Index: 5, ObjectId: 0x5002u, SpellId: 0) };
         var (adds, removes) = NewSpies(out var add, out var rem);
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u, useItem: _ => { },
             sendAddShortcut: add, sendRemoveShortcut: rem);
 
@@ -1370,7 +1387,7 @@ public class ToolbarControllerTests
         };
         var (adds, _) = NewSpies(out var add, out var remove);
         var controller = ToolbarController.Bind(
-            layout, repo, () => shortcuts,
+            layout, repo, Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             sendAddShortcut: add,
@@ -1393,7 +1410,7 @@ public class ToolbarControllerTests
         var shortcuts = new System.Collections.Generic.List<ShortcutEntry>
         { new(Index: 3, ObjectId: 0x5001u, SpellId: 0) };
         var (adds, removes) = NewSpies(out var add, out var rem);
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u, useItem: _ => { },
             sendAddShortcut: add, sendRemoveShortcut: rem);
 
@@ -1419,7 +1436,7 @@ public class ToolbarControllerTests
             new ShortcutEntry(5, 0x5002u, 0xA5C31234u),
         };
         var wire = new List<string>();
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             sendAddShortcut: entry => wire.Add($"add:{entry.Index}:{entry.ObjectId:X8}:{entry.SpellId:X8}"),
@@ -1452,7 +1469,7 @@ public class ToolbarControllerTests
             new ShortcutEntry(4, 0x5001u, 0x11223344u),
         };
         var wire = new List<string>();
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_, _, _, _, _) => 1u,
             useItem: _ => { },
             sendAddShortcut: entry => wire.Add($"add:{entry.Index}:{entry.ObjectId:X8}:{entry.SpellId:X8}"),
@@ -1477,7 +1494,7 @@ public class ToolbarControllerTests
         var shortcuts = new System.Collections.Generic.List<ShortcutEntry>
         { new(Index: 3, ObjectId: 0x5001u, SpellId: 0) };
         var (adds, removes) = NewSpies(out var add, out var rem);
-        var ctrl = ToolbarController.Bind(layout, repo, () => shortcuts,
+        var ctrl = ToolbarController.Bind(layout, repo, Store(shortcuts),
             iconIds: (_,_,_,_,_) => 0x77u, useItem: _ => { },
             sendAddShortcut: add, sendRemoveShortcut: rem);
 
@@ -1496,7 +1513,7 @@ public class ToolbarControllerTests
     {
         var (layout, slots, _) = FakeToolbar();
         ToolbarController.Bind(layout, new ClientObjectTable(),
-            () => System.Array.Empty<ShortcutEntry>(),
+            new ShortcutStore(),
             iconIds: (_,_,_,_,_) => 0u, useItem: _ => { });
         Assert.Equal(0x060011FAu, slots[Row1[0]].Cell.DragAcceptSprite);   // green cross, not the ring F9
     }

tests/AcDream.App.Tests/UI/RetailItemConfirmationControllerTests.cs

@@ -18,6 +18,7 @@ public sealed class RetailItemConfirmationControllerTests
         var uses = new List<uint>();
         var items = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: uses.Add,
             sendUseWithTarget: null,
@@ -52,6 +53,7 @@ public sealed class RetailItemConfirmationControllerTests
         var uses = new List<uint>();
         var items = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: uses.Add,
             sendUseWithTarget: null,
@@ -80,6 +82,7 @@ public sealed class RetailItemConfirmationControllerTests
         var messages = new List<string>();
         var items = new ItemInteractionController(
             objects,
+            new InventoryTransactionState(objects),
             playerGuid: () => Player,
             sendUse: uses.Add,
             sendUseWithTarget: null,

tests/AcDream.App.Tests/UI/RetailUiInteractionFlowTests.cs

@@ -163,6 +163,7 @@ public sealed class RetailUiInteractionFlowTests
         {
             var interaction = new ItemInteractionController(
                 Objects,
+                new InventoryTransactionState(Objects),
                 playerGuid: () => Player,
                 sendUse: Uses.Add,
                 sendUseWithTarget: (source, target) => UseWithTarget.Add((source, target)),
@@ -197,6 +198,7 @@ public sealed class RetailUiInteractionFlowTests
         {
             itemInteraction ??= new ItemInteractionController(
                 Objects,
+                new InventoryTransactionState(Objects),
                 () => Player,
                 sendUse: null,
                 sendUseWithTarget: null,

tests/AcDream.Core.Tests/Items/ShortcutStoreTests.cs

@@ -41,4 +41,41 @@ public class ShortcutStoreTests
         store.SetItem(18, 1u); // no-op, no throw
         store.Remove(-1);      // no-op, no throw
     }
+
+    [Fact]
+    public void RevisionObserversAndDisposalTrackTheOneCanonicalSlotMap()
+    {
+        var store = new ShortcutStore();
+        int observed = 0;
+        store.Changed += () => throw new InvalidOperationException("observer");
+        store.Changed += () => observed++;
+
+        store.Load([new ShortcutEntry(2, 0x5001u, 0u)]);
+
+        Assert.Equal(1, observed);
+        Assert.Equal(1, store.Revision);
+        Assert.Equal(1, store.DispatchFailureCount);
+        Assert.Equal(2, store.SubscriberCount);
+        Assert.Equal(1, store.Count);
+
+        store.Set(new ShortcutEntry(2, 0x5001u, 0u));
+        Assert.Equal(1, store.Revision);
+        Assert.Equal(1, observed);
+
+        store.Set(new ShortcutEntry(2, 0x5002u, 0u));
+        Assert.Equal(2, store.Revision);
+        Assert.Equal(2, observed);
+
+        store.Dispose();
+        store.Dispose();
+
+        Assert.True(store.IsDisposed);
+        Assert.Empty(store.Items);
+        Assert.Equal(0, store.SubscriberCount);
+        Assert.Equal(3, observed);
+        Assert.Equal(3, store.Revision);
+        Assert.Equal(3, store.DispatchFailureCount);
+        Assert.Throws<ObjectDisposedException>(
+            () => store.SetItem(1, 1u));
+    }
 }

tests/AcDream.Runtime.Tests/Gameplay/RuntimeCharacterStateTests.cs

@@ -115,7 +115,7 @@ public sealed class RuntimeCharacterStateTests
     }
 
     [Fact]
-    public void DisposalRetriesObserverFailuresAndClearsBothOwners()
+    public void DisposalReportsObserverFailuresAfterTerminalConvergence()
     {
         var state = new RuntimeCharacterState();
         state.Spellbook.OnSpellLearned(7u);
@@ -143,13 +143,13 @@ public sealed class RuntimeCharacterStateTests
             state.Dispose);
 
         Assert.Equal(2, error.InnerExceptions.Count);
-        Assert.False(state.IsDisposed);
+        Assert.True(state.IsDisposed);
         Assert.False(state.Spellbook.Knows(7u));
         Assert.Null(state.LocalPlayer.Get(
             AcDream.Core.Player.LocalPlayerState.VitalKind.Health));
+        Assert.True(state.CaptureOwnership().IsConverged);
 
         state.Dispose();
-        state.Dispose();
 
         Assert.True(state.IsDisposed);
     }
@@ -254,4 +254,77 @@ public sealed class RuntimeCharacterStateTests
         Assert.True(first.View.Snapshot.SpellbookRevision > 0);
         Assert.Equal(0, second.View.Snapshot.SpellbookRevision);
     }
+
+    [Fact]
+    public void SpellbookCommandsFollowRetailLocalAndOutboundOrder()
+    {
+        using var state = new RuntimeCharacterState();
+        var order = new List<string>();
+        state.Spellbook.SpellbookChanged += () => order.Add("local");
+        state.Spellbook.DesiredComponentsChanged += () => order.Add("local");
+
+        Assert.True(state.TryAddFavorite(
+            0,
+            0,
+            42u,
+            () => order.Add("send")));
+        Assert.Equal(["local", "send"], order);
+        Assert.Equal([42u], state.Spellbook.GetFavorites(0));
+
+        order.Clear();
+        state.SetSpellbookFilter(0x3FFEu, () => order.Add("send"));
+        Assert.Equal(["local", "send"], order);
+        Assert.Equal(0x3FFEu, state.Spellbook.SpellbookFilters);
+
+        order.Clear();
+        Assert.True(state.TrySetDesiredComponent(
+            0x68000001u,
+            0u,
+            () => order.Add("send")));
+        Assert.Equal(["send", "local"], order);
+        Assert.True(state.Spellbook.DesiredComponents.ContainsKey(
+            0x68000001u));
+        Assert.Equal(0u, state.Spellbook.DesiredComponents[0x68000001u]);
+
+        order.Clear();
+        state.ClearDesiredComponents(() => order.Add("send"));
+        Assert.Equal(["send", "local"], order);
+        Assert.Empty(state.Spellbook.DesiredComponents);
+
+        Assert.Throws<InvalidOperationException>(
+            () => state.TrySetDesiredComponent(
+                0x68000002u,
+                10u,
+                () => throw new InvalidOperationException("transport")));
+        Assert.Equal(10u, state.Spellbook.DesiredComponents[0x68000002u]);
+    }
+
+    [Fact]
+    public void InvalidSpellbookCommandsDoNotPublishOrMutate()
+    {
+        using var state = new RuntimeCharacterState();
+        int sends = 0;
+
+        Assert.False(state.TryAddFavorite(
+            8,
+            0,
+            42u,
+            () => sends++));
+        Assert.False(state.TryRemoveFavorite(
+            -1,
+            42u,
+            () => sends++));
+        Assert.False(state.TrySetDesiredComponent(
+            0u,
+            1u,
+            () => sends++));
+        Assert.False(state.TrySetDesiredComponent(
+            1u,
+            5001u,
+            () => sends++));
+
+        Assert.Equal(0, sends);
+        Assert.Empty(state.Spellbook.GetFavorites(0));
+        Assert.Empty(state.Spellbook.DesiredComponents);
+    }
 }

tests/AcDream.Runtime.Tests/Gameplay/RuntimeGameplayOwnershipTests.cs

@@ -0,0 +1,143 @@
+using AcDream.Core.Chat;
+using AcDream.Core.Items;
+using AcDream.Core.Social;
+using AcDream.Runtime.Entities;
+using AcDream.Runtime.Gameplay;
+
+namespace AcDream.Runtime.Tests.Gameplay;
+
+public sealed class RuntimeGameplayOwnershipTests
+{
+    [Fact]
+    public void CombinedLedgerConvergesEveryJ4OwnerAndSubscription()
+    {
+        using var entities = new RuntimeEntityObjectLifetime();
+        var inventory = new RuntimeInventoryState(entities);
+        var character = new RuntimeCharacterState();
+        var communication = new RuntimeCommunicationState();
+        inventory.Shortcuts.Changed += static () => { };
+        inventory.Shortcuts.Load([new ShortcutEntry(1, 2u, 3u)]);
+        inventory.ItemMana.OnQueryItemManaResponse(2u, 0.5f, true);
+        inventory.ExternalContainers.RequestOpen(3u);
+        inventory.ExternalContainers.ApplyViewContents(3u);
+        inventory.Transactions.IncrementBusyCount();
+
+        character.Spellbook.OnSpellLearned(4u);
+        character.Spellbook.SetFavorite(0, 0, 4u);
+        character.Spellbook.SetDesiredComponent(5u, 6u);
+        character.LocalPlayer.OnVitalUpdate(7u, 1u, 2u, 3u, 4u);
+        character.LocalPlayer.OnAttributeUpdate(1u, 2u, 3u, 4u);
+        character.LocalPlayer.OnSkillUpdate(
+            6u, 1u, 2u, 3u, 4u, 5u, 6d, 7u);
+        character.Options.Replace(1u, 2u);
+        character.MovementSkills.Update(3, 4);
+
+        communication.Chat.OnTellReceived(
+            "Sender",
+            "hello",
+            0x50000001u);
+        communication.Chat.OnSelfSent(
+            ChatKind.Tell,
+            "reply",
+            "Recipient");
+        communication.TurbineChat.OnChannelsReceived(
+            1u, 2u, 3u, 4u, 5u, 6u, 7u, 8u, 9u, 10u);
+        communication.Friends.Apply(new FriendsUpdate(
+            FriendsUpdateType.Full,
+            [new FriendEntry(1u, "Friend", true, false, [], [])]));
+        communication.Squelch.Replace(new SquelchDatabase(
+            new Dictionary<string, uint> { ["account"] = 1u },
+            new Dictionary<uint, SquelchInfo>
+            {
+                [2u] = new SquelchInfo(
+                    "Character",
+                    false,
+                    new HashSet<uint> { 3u }),
+            },
+            new SquelchInfo(
+                string.Empty,
+                false,
+                new HashSet<uint> { 4u })));
+        IDisposable subscription =
+            communication.Events.Subscribe(new NoopObserver());
+
+        RuntimeGameplayOwnershipSnapshot populated =
+            RuntimeGameplayOwnership.Capture(
+                inventory,
+                character,
+                communication);
+
+        Assert.False(populated.IsConverged);
+        Assert.Equal(1, populated.Inventory.ShortcutCount);
+        Assert.Equal(1, populated.Character.LearnedSpellCount);
+        Assert.Equal(1, populated.Communication.StreamSubscriberCount);
+        Assert.True(populated.Communication.HasReplyTarget);
+        Assert.True(populated.Communication.HasRetellTarget);
+
+        communication.Dispose();
+        character.Dispose();
+        inventory.Dispose();
+        subscription.Dispose();
+
+        RuntimeGameplayOwnershipSnapshot retired =
+            RuntimeGameplayOwnership.Capture(
+                inventory,
+                character,
+                communication);
+
+        Assert.True(retired.IsConverged);
+        Assert.Equal(0, retired.Inventory.ShortcutSubscriberCount);
+        Assert.False(retired.Character.InternalSubscriptionsAttached);
+        Assert.Equal(0, retired.Communication.StreamSubscriberCount);
+        Assert.Equal(0, retired.Communication.PendingDispatchCount);
+    }
+
+    [Fact]
+    public void BorrowerFailuresCannotStrandAnyJ4OwnerDuringTerminalDisposal()
+    {
+        using var entities = new RuntimeEntityObjectLifetime();
+        var inventory = new RuntimeInventoryState(entities);
+        var character = new RuntimeCharacterState();
+        var communication = new RuntimeCommunicationState();
+
+        inventory.ExternalContainers.RequestOpen(0x70000001u);
+        inventory.ExternalContainers.ApplyViewContents(0x70000001u);
+        inventory.ExternalContainers.Changed += static _ =>
+            throw new InvalidOperationException("inventory observer");
+
+        character.Spellbook.OnSpellLearned(42u);
+        character.LocalPlayer.OnVitalUpdate(7u, 1u, 2u, 3u, 4u);
+        character.Spellbook.SpellbookChanged += static () =>
+            throw new InvalidOperationException("spellbook observer");
+        character.LocalPlayer.CharacterChanged += static () =>
+            throw new InvalidOperationException("character observer");
+
+        _ = communication.Events.Subscribe(new ThrowingObserver());
+        communication.Chat.OnSystemMessage("failure-isolated event", 0u);
+        Assert.Equal(1, communication.DispatchFailureCount);
+
+        Assert.Throws<AggregateException>(inventory.Dispose);
+        Assert.Throws<AggregateException>(character.Dispose);
+        communication.Dispose();
+
+        RuntimeGameplayOwnershipSnapshot retired =
+            RuntimeGameplayOwnership.Capture(
+                inventory,
+                character,
+                communication);
+
+        Assert.True(retired.IsConverged);
+        Assert.Equal(1, retired.Communication.DispatchFailureCount);
+    }
+
+    private sealed class NoopObserver : IRuntimeCommunicationObserver
+    {
+        public void OnChat(in RuntimeCommunicationEvent delta) { }
+    }
+
+    private sealed class ThrowingObserver : IRuntimeCommunicationObserver
+    {
+        public void OnChat(in RuntimeCommunicationEvent delta) =>
+            throw new InvalidOperationException("communication observer");
+    }
+}

tests/AcDream.Runtime.Tests/Gameplay/RuntimeInventoryStateTests.cs

@@ -11,7 +11,7 @@ public sealed class RuntimeInventoryStateTests
     {
         using var entities = new RuntimeEntityObjectLifetime();
         using var inventory = new RuntimeInventoryState(entities);
-        inventory.Shortcuts.Replace(
+        inventory.Shortcuts.Load(
         [
             new AcDream.Core.Items.ShortcutEntry(3, 0x80000001u, 0u),
             new AcDream.Core.Items.ShortcutEntry(4, 0u, 42u),
@@ -55,12 +55,12 @@ public sealed class RuntimeInventoryStateTests
         inventory.ExternalContainers.RequestOpen(0x70000001u);
         inventory.ExternalContainers.ApplyViewContents(0x70000001u);
         inventory.ItemMana.OnQueryItemManaResponse(0x50000001u, 0.75f, true);
-        inventory.Shortcuts.Replace(shortcuts);
+        inventory.Shortcuts.Load(shortcuts);
 
         Assert.Same(entities.Objects, inventory.Objects);
         Assert.Equal(0x70000001u, inventory.ExternalContainers.CurrentContainerId);
         Assert.Equal(0.75f, inventory.ItemMana.GetManaPercent(0x50000001u));
-        Assert.Same(shortcuts, inventory.Shortcuts.Items);
+        Assert.Equal(shortcuts, inventory.Shortcuts.Items);
         Assert.Equal(1, inventory.Shortcuts.Revision);
     }
 
@@ -72,7 +72,7 @@ public sealed class RuntimeInventoryStateTests
         inventory.ExternalContainers.RequestOpen(0x70000001u);
         inventory.ExternalContainers.ApplyViewContents(0x70000001u);
         inventory.ItemMana.OnQueryItemManaResponse(0x50000001u, 0.75f, true);
-        inventory.Shortcuts.Replace([new ShortcutEntry(1, 2u, 3u)]);
+        inventory.Shortcuts.Load([new ShortcutEntry(1, 2u, 3u)]);
         inventory.Transactions.IncrementBusyCount();
 
         inventory.ResetExternalContainer();
@@ -98,7 +98,7 @@ public sealed class RuntimeInventoryStateTests
         using var first = new RuntimeInventoryState(firstEntities);
         using var second = new RuntimeInventoryState(secondEntities);
 
-        first.Shortcuts.Replace([new ShortcutEntry(1, 2u, 3u)]);
+        first.Shortcuts.Load([new ShortcutEntry(1, 2u, 3u)]);
         first.Transactions.IncrementBusyCount();
 
         Assert.NotSame(first.Objects, second.Objects);
@@ -116,7 +116,7 @@ public sealed class RuntimeInventoryStateTests
         inventory.ExternalContainers.RequestOpen(0x70000001u);
         inventory.ExternalContainers.ApplyViewContents(0x70000001u);
         inventory.ItemMana.OnQueryItemManaResponse(0x50000001u, 0.5f, true);
-        inventory.Shortcuts.Replace([new ShortcutEntry(1, 2u, 3u)]);
+        inventory.Shortcuts.Load([new ShortcutEntry(1, 2u, 3u)]);
 
         inventory.Dispose();
         inventory.Dispose();
@@ -129,7 +129,7 @@ public sealed class RuntimeInventoryStateTests
     }
 
     [Fact]
-    public void DisposalRetriesATransientOwnerObserverFailureToConvergence()
+    public void DisposalFailureIsReportedAfterTerminalOwnerConvergence()
     {
         using var entities = new RuntimeEntityObjectLifetime();
         var inventory = new RuntimeInventoryState(entities);
@@ -146,12 +146,72 @@ public sealed class RuntimeInventoryStateTests
         };
 
         Assert.Throws<AggregateException>(inventory.Dispose);
-        Assert.False(inventory.IsDisposed);
+        Assert.True(inventory.IsDisposed);
         Assert.True(inventory.Transactions.IsDisposed);
+        inventory.Dispose();
+
+        Assert.True(inventory.CaptureOwnership().IsConverged);
+        Assert.Equal(0u, inventory.ExternalContainers.CurrentContainerId);
+    }
+
+    [Fact]
+    public void ShortcutCommandsUseRetailSendThenLocalOrderOnTheExactOwner()
+    {
+        using var entities = new RuntimeEntityObjectLifetime();
+        using var inventory = new RuntimeInventoryState(entities);
+        var order = new List<string>();
+        inventory.Shortcuts.Changed += () => order.Add("local");
+        var entry = new ShortcutEntry(3, 0x80000001u, 0u);
+
+        Assert.True(inventory.TryAddShortcut(
+            entry,
+            () =>
+            {
+                Assert.Null(inventory.Shortcuts.GetEntry(3));
+                order.Add("send");
+            }));
+        Assert.Equal(["send", "local"], order);
+        Assert.Equal(entry, inventory.Shortcuts.GetEntry(3));
+
+        order.Clear();
+        Assert.True(inventory.TryRemoveShortcut(
+            3,
+            () =>
+            {
+                Assert.Equal(entry, inventory.Shortcuts.GetEntry(3));
+                order.Add("send");
+            }));
+        Assert.Equal(["send", "local"], order);
+        Assert.Null(inventory.Shortcuts.GetEntry(3));
+
+        Assert.Throws<InvalidOperationException>(
+            () => inventory.TryAddShortcut(
+                entry,
+                () => throw new InvalidOperationException("transport")));
+        Assert.Equal(entry, inventory.Shortcuts.GetEntry(3));
+
+        int sends = 0;
+        Assert.False(inventory.TryAddShortcut(
+            new ShortcutEntry(ShortcutStore.SlotCount, 1u, 0u),
+            () => sends++));
+        Assert.False(inventory.TryRemoveShortcut(-1, () => sends++));
+        Assert.Equal(0, sends);
+    }
+
+    [Fact]
+    public void DisposalRetiresShortcutObserversAndTransactionSubscriptions()
+    {
+        using var entities = new RuntimeEntityObjectLifetime();
+        var inventory = new RuntimeInventoryState(entities);
+        inventory.Shortcuts.Changed += static () => { };
+        inventory.Shortcuts.Load([new ShortcutEntry(1, 2u, 3u)]);
 
         inventory.Dispose();
 
         Assert.True(inventory.IsDisposed);
-        Assert.Equal(0u, inventory.ExternalContainers.CurrentContainerId);
+        Assert.True(inventory.Shortcuts.IsDisposed);
+        Assert.True(inventory.Transactions.IsDisposed);
+        Assert.Equal(0, inventory.Shortcuts.SubscriberCount);
+        Assert.Empty(inventory.Shortcuts.Items);
     }
 }