Merge branch 'dev/pie-lover'

AetherBags/Addons/AddonInventoryWindow.cs

@@ -25,16 +25,20 @@ public unsafe class AddonInventoryWindow : InventoryAddonBase
     {
         InitializeBackgroundDropTarget();
 
-        CategoriesNode = new WrappingGridNode<InventoryCategoryNodeBase>
+        ScrollableCategories = new ScrollingAreaNode<WrappingGridNode<InventoryCategoryNodeBase>>
         {
             Position = ContentStartPosition,
             Size = ContentSize,
-            HorizontalSpacing = CategorySpacing,
-            VerticalSpacing = CategorySpacing,
-            TopPadding = 4.0f,
-            BottomPadding = 4.0f,
+            ContentHeight = 0f,
+            AutoHideScrollBar = true,
         };
-        CategoriesNode.AttachNode(this);
+        ScrollableCategories.AttachNode(this);
+
+        CategoriesNode = ScrollableCategories.ContentNode;
+        CategoriesNode.HorizontalSpacing = CategorySpacing;
+        CategoriesNode.VerticalSpacing = CategorySpacing;
+        CategoriesNode.TopPadding = 4.0f;
+        CategoriesNode.BottomPadding = 4.0f;
 
         _lootedCategoryNode = new LootedItemsCategoryNode
         {
@@ -127,6 +131,7 @@ public unsafe class AddonInventoryWindow : InventoryAddonBase
 
                 CategoriesNode.RemoveNode(_lootedCategoryNode);
             }
+            CategoriesNode.InvalidateLayout();
             AutoSizeWindow();
         }
     }
@@ -134,6 +139,7 @@ public unsafe class AddonInventoryWindow : InventoryAddonBase
     private void OnDismissLootedItem(int index)
     {
         System.LootedItemsTracker.RemoveByIndex(index);
+        System.LootedItemsTracker.FlushPendingChanges();
     }
 
     private void OnClearAllLootedItems()
@@ -148,6 +154,21 @@ public unsafe class AddonInventoryWindow : InventoryAddonBase
         FooterNode.RefreshCurrencies();
     }
 
+    protected override void UpdateHeaderLayout()
+    {
+        base.UpdateHeaderLayout();
+
+        AtkUnitBase* addon = this;
+        if (addon == null) return;
+
+        var header = CalculateHeaderLayout(addon);
+
+        if (_notificationNode != null)
+        {
+            _notificationNode.Size = new Vector2(header.HeaderWidth, 28f);
+        }
+    }
+
     public void SetNotification(InventoryNotificationInfo info)
     {
         Services.Framework.RunOnTick(() =>
@@ -168,6 +189,8 @@ public unsafe class AddonInventoryWindow : InventoryAddonBase
 
         addon->UnsubscribeAtkArrayData(1, (int)NumberArrayType.Inventory);
 
+        _lootedCategoryNode?.Dispose();
+
         IsSetupComplete = false;
         base.OnFinalize(addon);
     }

AetherBags/Addons/AddonRetainerWindow.cs

@@ -27,7 +27,7 @@ public unsafe class AddonRetainerWindow : InventoryAddonBase
 
     private readonly Vector3 _tintColor = new(8f / 255f, -8f / 255f, -4f / 255f);
 
-    protected override float MinWindowWidth => 400;
+    protected override float MinWindowWidth => 500;
     protected override float MaxWindowWidth => 700;
 
     private readonly string[] _retainerAddonNames = { "InventoryRetainer", "InventoryRetainerLarge" };
@@ -38,16 +38,20 @@ public unsafe class AddonRetainerWindow : InventoryAddonBase
 
         WindowNode?.AddColor = _tintColor;
 
-        CategoriesNode = new WrappingGridNode<InventoryCategoryNodeBase>
+        ScrollableCategories = new ScrollingAreaNode<WrappingGridNode<InventoryCategoryNodeBase>>
         {
             Position = ContentStartPosition,
             Size = ContentSize,
-            HorizontalSpacing = CategorySpacing,
-            VerticalSpacing = CategorySpacing,
-            TopPadding = 4.0f,
-            BottomPadding = 4.0f,
+            ContentHeight = 0f,
+            AutoHideScrollBar = true,
         };
-        CategoriesNode.AttachNode(this);
+        ScrollableCategories.AttachNode(this);
+
+        CategoriesNode = ScrollableCategories.ContentNode;
+        CategoriesNode.HorizontalSpacing = CategorySpacing;
+        CategoriesNode.VerticalSpacing = CategorySpacing;
+        CategoriesNode.TopPadding = 4.0f;
+        CategoriesNode.BottomPadding = 4.0f;
 
         var header = CalculateHeaderLayout(addon);
 
@@ -90,7 +94,6 @@ public unsafe class AddonRetainerWindow : InventoryAddonBase
         };
         _entrustDuplicatesButton.AttachNode(this);
 
-        // Slot counter
         _slotCounterNode = new TextNode
         {
             Position = new Vector2(Size.X - 10, 0),

AetherBags/Addons/AddonSaddleBagWindow.cs

@@ -22,7 +22,7 @@ public unsafe class AddonSaddleBagWindow :  InventoryAddonBase
 
     private readonly Vector3 _tintColor = new (-16f / 255f, -4f / 255f, 8f / 255f);
 
-    protected override float MinWindowWidth => 400;
+    protected override float MinWindowWidth => 500;
     protected override float MaxWindowWidth => 600;
 
     protected override void OnSetup(AtkUnitBase* addon)
@@ -31,16 +31,20 @@ public unsafe class AddonSaddleBagWindow :  InventoryAddonBase
 
         WindowNode?.AddColor = _tintColor;
 
-        CategoriesNode = new WrappingGridNode<InventoryCategoryNodeBase>
+        ScrollableCategories = new ScrollingAreaNode<WrappingGridNode<InventoryCategoryNodeBase>>
         {
             Position = ContentStartPosition,
             Size = ContentSize,
-            HorizontalSpacing = CategorySpacing,
-            VerticalSpacing = CategorySpacing,
-            TopPadding = 4.0f,
-            BottomPadding = 4.0f,
+            ContentHeight = 0f,
+            AutoHideScrollBar = true,
         };
-        CategoriesNode.AttachNode(this);
+        ScrollableCategories.AttachNode(this);
+
+        CategoriesNode = ScrollableCategories.ContentNode;
+        CategoriesNode.HorizontalSpacing = CategorySpacing;
+        CategoriesNode.VerticalSpacing = CategorySpacing;
+        CategoriesNode.TopPadding = 4.0f;
+        CategoriesNode.BottomPadding = 4.0f;
 
         var header = CalculateHeaderLayout(addon);
 

AetherBags/Addons/InventoryAddonBase.cs

@@ -29,6 +29,7 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
     protected readonly HashSet<InventoryCategoryNode> HoverSubscribed = new();
 
     protected DragDropNode BackgroundDropTarget = null!;
+    protected ScrollingAreaNode<WrappingGridNode<InventoryCategoryNodeBase>> ScrollableCategories = null!;
     protected WrappingGridNode<InventoryCategoryNodeBase> CategoriesNode = null!;
     protected TextInputWithButtonNode SearchInputNode = null!;
     protected InventoryFooterNode FooterNode = null!;
@@ -37,6 +38,18 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
     internal ContextMenu ContextMenu = null!;
 
+    protected readonly SharedNodePool<InventoryDragDropNode> SharedItemNodePool = new(
+        maxSize: 256,
+        factory: null,
+        resetAction: node => node.ResetForReuse());
+
+    protected readonly SharedNodePool<InventoryCategoryNode> SharedCategoryNodePool = new(
+        maxSize: 32,
+        factory: null,
+        resetAction: node => node.ResetForReuse());
+
+    protected readonly VirtualizationState CategoryVirtualization = new() { BufferSize = 200f };
+
     protected virtual float MinWindowWidth => 600;
     protected virtual float MaxWindowWidth => 800;
     protected virtual float MinWindowHeight => 200;
@@ -47,11 +60,16 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
     protected const float ItemPadding = 5;
     protected const float FooterHeight = 28f;
     protected const float FooterTopSpacing = 4f;
-    protected const float SettingsButtonOffset = 48f;
+    protected const float SettingsButtonOffset = 62f;
+    protected const float ScrollBarWidth = 16f;
+    protected const float ContentHeightOffset = 4f;
 
     protected bool RefreshQueued;
     protected bool RefreshAutosizeQueued;
     protected bool IsSetupComplete;
+    private bool _deferredPopulationInProgress;
+    private bool _initialPopulationComplete;
+    private const int ItemsPerFrame = 50;
 
     protected abstract InventoryStateBase InventoryState { get; }
 
@@ -61,6 +79,7 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
     private readonly HashSet<uint> _searchMatchScratch = new();
     private bool _isRefreshing;
+    private string _lastSearchText = string.Empty;
 
     private int _requestedUpdateCount;
     private int _refreshFromLifecycleCount;
@@ -72,6 +91,13 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
     public InventoryStats GetStats() => InventoryState.GetStats();
 
+    public IReadOnlyList<CategorizedInventory>? GetVisibleCategories()
+    {
+        if (!IsSetupComplete) return null;
+        string filter = GetSearchText();
+        return InventoryState.GetCategories(filter);
+    }
+
     public virtual void SetSearchText(string searchText)
     {
         Services.Framework.RunOnTick(() =>
@@ -109,6 +135,12 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         string searchText = SearchInputNode.SearchString.ExtractText();
         bool isSearching = !string.IsNullOrWhiteSpace(searchText);
 
+        if (searchText != _lastSearchText)
+        {
+            _lastSearchText = searchText;
+            System.AetherBagsAPI?.API.RaiseSearchChanged(searchText);
+        }
+
         if (config.SearchMode == SearchMode.Highlight && isSearching)
         {
             _searchMatchScratch.Clear();
@@ -154,17 +186,20 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         float maxContentWidth = CategoriesNode.Width > 0 ? CategoriesNode.Width : ContentSize.X;
         int maxItemsPerLine = CalculateOptimalItemsPerLine(maxContentWidth);
 
+        bool deferItems = !_deferredPopulationInProgress && !_initialPopulationComplete;
+
         CategoriesNode.SyncWithListDataByKey<CategorizedInventory, InventoryCategoryNode, uint>(
             dataList: categories,
             getKeyFromData: categorizedInventory => categorizedInventory.Key,
             getKeyFromNode: node => node.CategorizedInventory.Key,
             updateNode: (node, data) =>
             {
-                node.MaxWidth = maxContentWidth;
-                node.SetCategoryData(data, Math.Min(data.Items.Count, maxItemsPerLine));
-                node.RefreshNodeVisuals();
+                node.SetCategoryData(data, Math.Min(data.Items.Count, maxItemsPerLine), deferItemCreation: deferItems);
+                if (!deferItems) node.RefreshNodeVisuals();
             },
-            createNodeMethod: _ => CreateCategoryNode(maxContentWidth));
+            createNodeMethod: _ => CreateCategoryNode(),
+            resetNodeForReuse: ResetCategoryNodeForReuse,
+            externalPool: SharedCategoryNodePool);
 
         if (HasPinning)
         {
@@ -174,6 +209,8 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
         WireHoverHandlers();
 
+        CategoriesNode.InvalidateLayout();
+
         if (autosize)
             AutoSizeWindow();
         else
@@ -181,6 +218,104 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
             LayoutContent();
             CategoriesNode.RecalculateLayout();
         }
+
+        if (deferItems && !_deferredPopulationInProgress)
+        {
+            StartDeferredItemPopulation();
+        }
+        else if (!deferItems && !_initialPopulationComplete)
+        {
+            _initialPopulationComplete = true;
+        }
+
+        System.AetherBagsAPI?.API.RaiseCategoriesRefreshed();
+    }
+
+    private void StartDeferredItemPopulation()
+    {
+        _deferredPopulationInProgress = true;
+        Services.Framework.RunOnTick(PopulateCategoryBatch, delayTicks: 1);
+    }
+
+    private void PopulateCategoryBatch()
+    {
+        if (!IsOpen)
+        {
+            _deferredPopulationInProgress = false;
+            return;
+        }
+
+        UpdateCategoryVisibility();
+
+        int itemsPopulated = 0;
+        using (CategoriesNode.DeferRecalculateLayout())
+        {
+            var nodes = CategoriesNode.Nodes;
+            for (int i = 0; i < nodes.Count; i++)
+            {
+                if (nodes[i] is not InventoryCategoryNode categoryNode || !categoryNode.NeedsItemPopulation)
+                    continue;
+
+                if (!CategoryVirtualization.IsVisible(i))
+                    continue;
+
+                int categoryItemCount = categoryNode.CategorizedInventory.Items.Count;
+
+                if (itemsPopulated > 0 && itemsPopulated + categoryItemCount > ItemsPerFrame)
+                    break;
+
+                categoryNode.PopulateItems();
+                categoryNode.RefreshNodeVisuals();
+                itemsPopulated += categoryItemCount;
+
+                if (itemsPopulated >= ItemsPerFrame)
+                    break;
+            }
+
+            if (itemsPopulated < ItemsPerFrame)
+            {
+                for (int i = 0; i < nodes.Count; i++)
+                {
+                    if (nodes[i] is not InventoryCategoryNode categoryNode || !categoryNode.NeedsItemPopulation)
+                        continue;
+
+                    if (CategoryVirtualization.IsVisible(i))
+                        continue;
+
+                    int categoryItemCount = categoryNode.CategorizedInventory.Items.Count;
+
+                    if (itemsPopulated > 0 && itemsPopulated + categoryItemCount > ItemsPerFrame)
+                        break;
+
+                    categoryNode.PopulateItems();
+                    categoryNode.RefreshNodeVisuals();
+                    itemsPopulated += categoryItemCount;
+
+                    if (itemsPopulated >= ItemsPerFrame)
+                        break;
+                }
+            }
+        }
+
+        bool hasMore = false;
+        foreach (var node in CategoriesNode.Nodes)
+        {
+            if (node is InventoryCategoryNode categoryNode && categoryNode.NeedsItemPopulation)
+            {
+                hasMore = true;
+                break;
+            }
+        }
+
+        if (hasMore)
+        {
+            Services.Framework.RunOnTick(PopulateCategoryBatch);
+        }
+        else
+        {
+            _deferredPopulationInProgress = false;
+            _initialPopulationComplete = true;
+        }
     }
 
     protected readonly struct HeaderLayout
@@ -196,11 +331,38 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         var header = addon->WindowHeaderCollisionNode;
         float headerW = header->Width;
 
-        float settingsX = headerW - 62f;
         float itemY = header->Y + (header->Height - 28f) * 0.5f;
 
-        float searchWidth = headerW * 0.45f;
-        float searchX = (headerW - searchWidth) * 0.5f;
+        // Reserve space for close button (~50px) and settings button (~48px + gap)
+        const float closeButtonReserve = 50f;
+        const float settingsButtonWidth = 28f;
+        const float minGap = 16f;
+        const float minSearchWidth = 150f;
+        const float maxSearchWidth = 350f;
+
+        // Calculate max available width for search bar
+        // Layout from right: [closeButton 50px] [settings 28px] [gap 16px] [searchBar] [gap 16px] [leftContent]
+        float rightReserve = closeButtonReserve + settingsButtonWidth + minGap;
+        float leftReserve = 220f; // Space for title (e.g. "Chocobo Saddlebag" is ~200px)
+        float availableForSearch = headerW - rightReserve - leftReserve;
+
+        // Search bar width: prefer 45% of header, but clamp to available space and min/max
+        float desiredSearchWidth = headerW * 0.45f;
+        float searchWidth = Math.Clamp(desiredSearchWidth, minSearchWidth, Math.Min(maxSearchWidth, availableForSearch));
+
+        // Center the search bar, but ensure it doesn't extend past the safe right boundary
+        float maxSearchRight = headerW - rightReserve;
+        float centeredSearchX = (headerW - searchWidth) * 0.5f;
+        float searchRight = centeredSearchX + searchWidth;
+
+        // If centered position would overlap with right elements, shift left
+        float searchX = searchRight > maxSearchRight
+            ? maxSearchRight - searchWidth
+            : centeredSearchX;
+
+        // Ensure search bar doesn't go past left reserve
+        if (searchX < leftReserve)
+            searchX = leftReserve;
 
         return new HeaderLayout
         {
@@ -231,17 +393,29 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         BackgroundDropTarget.AttachNode(this);
     }
 
-    protected virtual InventoryCategoryNode CreateCategoryNode(float? maxWidth = null)
+    protected virtual InventoryCategoryNode CreateCategoryNode()
     {
-        return new InventoryCategoryNode
+        var node = SharedCategoryNodePool.TryRent();
+        if (node == null)
+        {
+            node = new InventoryCategoryNode
             {
                 Size = ContentSize with { Y = 120 },
-            MaxWidth = maxWidth,
-            OnRefreshRequested = ManualRefresh,
-            OnDragEnd = () => InventoryOrchestrator.RefreshAll(updateMaps: true),
+                SharedItemPool = SharedItemNodePool,
             };
         }
 
+        node.OnRefreshRequested = ManualRefresh;
+        node.OnDragEnd = () => InventoryOrchestrator.RefreshAll(updateMaps: true);
+        node.SharedItemPool = SharedItemNodePool;
+        return node;
+    }
+
+    private static void ResetCategoryNodeForReuse(InventoryCategoryNode node)
+    {
+        node.ResetForReuse();
+    }
+
     private void OnBackgroundPayloadAccepted(DragDropNode node, DragDropPayload acceptedPayload)
     {
         if (!acceptedPayload.IsValidInventoryPayload) return;
@@ -316,17 +490,20 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         float gridH = contentSize.Y - (HasFooter ? FooterHeight + FooterTopSpacing : 0);
         if (gridH < 0) gridH = 0;
 
-        CategoriesNode.Position = contentPos;
-        CategoriesNode.Size = new Vector2(contentSize.X, gridH);
+        ScrollableCategories.Position = contentPos;
+        ScrollableCategories.Size = new Vector2(contentSize.X, gridH);
 
-        UpdateCategoryMaxWidths(contentSize.X);
+        float categoriesWidth = contentSize.X - ScrollBarWidth;
+        CategoriesNode.Width = categoriesWidth;
+
+        UpdateCategoryMaxWidths(categoriesWidth);
     }
 
     private void UpdateCategoryMaxWidths(float maxWidth)
     {
         foreach (var node in CategoriesNode.Nodes)
         {
-            if (node is InventoryCategoryNode categoryNode && categoryNode.MaxWidth != maxWidth)
+            if (node is InventoryCategoryNodeBase categoryNode && categoryNode.MaxWidth != maxWidth)
             {
                 categoryNode.MaxWidth = maxWidth;
                 categoryNode.RecalculateSize();
@@ -343,7 +520,7 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
         for (int i = 0; i < nodes.Count; i++)
         {
-            if (nodes[i] is not InventoryCategoryNode cat)
+            if (nodes[i] is not InventoryCategoryNodeBase cat)
                 continue;
 
             childCount++;
@@ -354,36 +531,68 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
         if (childCount == 0)
         {
             ResizeWindow(MinWindowWidth, MinWindowHeight, recalcLayout: true);
+            UpdateScrollParameters();
             return;
         }
 
-        float requiredWidth = maxChildWidth + (ContentStartPosition.X * 2);
+        float footerSpace = HasFooter || HasSlotCounter ? FooterHeight + FooterTopSpacing : 0;
+
+        float requiredWidth = maxChildWidth + ScrollBarWidth + (ContentStartPosition.X * 2);
         float finalWidth = Math.Clamp(requiredWidth, MinWindowWidth, MaxWindowWidth);
 
         if (SettingsButtonNode != null)
         {
-            SettingsButtonNode.X = finalWidth - 62f;
+            SettingsButtonNode.X = finalWidth - SettingsButtonOffset;
         }
 
         float contentWidth = finalWidth - (ContentStartPosition.X * 2);
+        float categoriesWidth = contentWidth - ScrollBarWidth;
 
-        float footerSpace = HasFooter || HasSlotCounter ?  FooterHeight + FooterTopSpacing : 0;
-        float gridBudget = Math.Max(0f, MaxWindowHeight - footerSpace);
-
-        CategoriesNode.Position = ContentStartPosition;
-        CategoriesNode.Size = new Vector2(contentWidth, gridBudget);
-
-        UpdateCategoryMaxWidths(contentWidth);
-
+        CategoriesNode.Width = categoriesWidth;
+        UpdateCategoryMaxWidths(categoriesWidth);
         CategoriesNode.RecalculateLayout();
 
         float requiredGridHeight = CategoriesNode.GetRequiredHeight();
-        float requiredContentHeight = requiredGridHeight + footerSpace;
 
-        float requiredWindowHeight = requiredContentHeight + ContentStartPosition.Y + ContentStartPosition.X;
+        float requiredContentHeight = requiredGridHeight + footerSpace;
+        float requiredWindowHeight = requiredContentHeight + ContentStartPosition.Y + ContentStartPosition.X + ContentHeightOffset;
         float finalHeight = Math.Clamp(requiredWindowHeight, MinWindowHeight, MaxWindowHeight);
 
         ResizeWindow(finalWidth, finalHeight, recalcLayout: false);
+
+        UpdateScrollParameters();
+    }
+
+    protected void UpdateScrollParameters()
+    {
+        if (ScrollableCategories == null) return;
+
+        float requiredHeight = CategoriesNode.GetRequiredHeight();
+        ScrollableCategories.ContentHeight = requiredHeight;
+
+        CategoryVirtualization.ViewportHeight = ScrollableCategories.Size.Y;
+        UpdateCategoryVisibility();
+    }
+
+    private void OnScrollValueChanged(int scrollPosition)
+    {
+        CategoryVirtualization.ScrollPosition = scrollPosition;
+    }
+
+    private void UpdateCategoryVisibility()
+    {
+        var nodes = CategoriesNode.Nodes;
+        CategoryVirtualization.SetItemCount(nodes.Count);
+
+        for (int i = 0; i < nodes.Count; i++)
+        {
+            if (nodes[i] is InventoryCategoryNodeBase cat)
+            {
+                CategoryVirtualization.SetItemLayout(i, cat.Y, cat.Height);
+            }
+        }
+
+        CategoryVirtualization.UpdateVisibility();
     }
 
     protected void ResizeWindow(float width, float height, bool recalcLayout)
@@ -395,10 +604,32 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
             BackgroundDropTarget.Size = ContentSize;
         }
 
+        UpdateHeaderLayout();
         LayoutContent();
 
         if (recalcLayout)
             CategoriesNode.RecalculateLayout();
+
+        UpdateScrollParameters();
+    }
+
+    protected virtual void UpdateHeaderLayout()
+    {
+        AtkUnitBase* addon = this;
+        if (addon == null) return;
+
+        var header = CalculateHeaderLayout(addon);
+
+        if (SearchInputNode != null)
+        {
+            SearchInputNode.Position = header.SearchPosition;
+            SearchInputNode.Size = header.SearchSize;
+        }
+
+        if (SettingsButtonNode != null)
+        {
+            SettingsButtonNode.Position = new Vector2(header.HeaderWidth - SettingsButtonOffset, header.HeaderY);
+        }
     }
 
     protected void ResizeWindow(float width, float height)
@@ -438,6 +669,13 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
     {
         ContextMenu = new ContextMenu();
 
+        System.AetherBagsAPI?.API.RaiseInventoryOpened();
+
+        if (ScrollableCategories != null)
+        {
+            ScrollableCategories.ScrollBarNode.OnValueChanged = OnScrollValueChanged;
+        }
+
         base.OnSetup(addon);
     }
 
@@ -457,10 +695,18 @@ public abstract unsafe class InventoryAddonBase : NativeAddon, IInventoryWindow
 
     protected override void OnFinalize(AtkUnitBase* addon)
     {
+        System.AetherBagsAPI?.API.RaiseInventoryClosed();
+
         ContextMenu?.Dispose();
         HoverSubscribed.Clear();
         RefreshQueued = false;
         RefreshAutosizeQueued = false;
+        _deferredPopulationInProgress = false;
+        _initialPopulationComplete = false;
+
+        SharedItemNodePool.Clear();
+        SharedCategoryNodePool.Clear();
+        CategoryVirtualization.ClearLayout();
 
         base.OnFinalize(addon);
     }

AetherBags/Addons/ItemContextMenuHandler.cs

@@ -0,0 +1,48 @@
+using AetherBags.Inventory.Items;
+using AetherBags.IPC.ExternalCategorySystem;
+using KamiToolKit.ContextMenu;
+
+namespace AetherBags.Addons;
+
+public static class ItemContextMenuHandler
+{
+    private static ContextMenu? _itemMenu;
+
+    public static void Initialize()
+    {
+        _itemMenu = new ContextMenu();
+    }
+
+    public static void Dispose()
+    {
+        _itemMenu?.Dispose();
+        _itemMenu = null;
+    }
+
+    public static bool TryShowExternalMenu(ItemInfo item)
+    {
+        if (_itemMenu == null) return false;
+        if (!System.Config.General.UseUnifiedExternalCategories) return false;
+
+        var entries = ExternalCategoryManager.GetContextMenuEntries(item.Item.ItemId);
+        if (entries == null || entries.Count == 0) return false;
+
+        _itemMenu.Clear();
+
+        var context = new ContextMenuContext(
+            item.Item.ItemId,
+            (int)item.Item.Container,
+            item.Item.Slot
+        );
+
+        foreach (var entry in entries)
+        {
+            var capturedEntry = entry;
+            var capturedContext = context;
+            _itemMenu.AddItem(entry.Label, () => capturedEntry.OnClick(capturedContext));
+        }
+
+        _itemMenu.Open();
+        return true;
+    }
+}

AetherBags/Configuration/GeneralSettings.cs

@@ -19,6 +19,7 @@ public class GeneralSettings
     public bool HideGameRetainer { get; set; } = false;
     public bool ShowCategoryItemCount { get; set; } = false;
     public bool LinkItemEnabled { get; set; } = false;
+    public bool UseUnifiedExternalCategories { get; set; } = false;
 }
 
 public enum InventoryStackMode : byte

AetherBags/Currency/CurrencyState.cs

@@ -2,7 +2,7 @@ using FFXIVClientStructs.FFXIV.Client.Game;
 using Lumina.Excel.Sheets;
 using System;
 using System.Collections.Generic;
-using System.Linq;
+using System.Runtime.InteropServices;
 
 namespace AetherBags.Currency;
 
@@ -16,6 +16,7 @@ public static unsafe class CurrencyState
 
     private static readonly Dictionary<uint, CurrencyItem> CurrencyItemByCurrencyIdCache = new(capacity:  32);
     private static readonly Dictionary<uint, CurrencyStaticInfo> CurrencyStaticByItemIdCache = new(capacity: 64);
+    private static readonly List<CurrencyInfo> CurrencyInfoScratch = new(capacity: 8);
 
     private static uint? _cachedLimitedTomestoneItemId;
     private static uint? _cachedNonLimitedTomestoneItemId;
@@ -29,6 +30,12 @@ public static unsafe class CurrencyState
     }
 
     public static IReadOnlyList<CurrencyInfo> GetCurrencyInfoList(uint[] currencyIds)
+        => GetCurrencyInfoListCore(currencyIds.AsSpan());
+
+    public static IReadOnlyList<CurrencyInfo> GetCurrencyInfoList(List<uint> currencyIds)
+        => GetCurrencyInfoListCore(CollectionsMarshal.AsSpan(currencyIds));
+
+    private static IReadOnlyList<CurrencyInfo> GetCurrencyInfoListCore(ReadOnlySpan<uint> currencyIds)
     {
         if (currencyIds.Length == 0)
             return Array.Empty<CurrencyInfo>();
@@ -37,7 +44,7 @@ public static unsafe class CurrencyState
         if (inventoryManager == null)
             return Array.Empty<CurrencyInfo>();
 
-        List<CurrencyInfo> currencyInfoList = new List<CurrencyInfo>(currencyIds.Length);
+        CurrencyInfoScratch.Clear();
 
         for (int i = 0; i < currencyIds.Length; i++)
         {
@@ -57,7 +64,7 @@ public static unsafe class CurrencyState
                 isCapped = weeklyAcquired >= weeklyLimit;
             }
 
-            currencyInfoList.Add(new CurrencyInfo
+            CurrencyInfoScratch.Add(new CurrencyInfo
             {
                 Amount = amount,
                 MaxAmount = staticInfo.MaxAmount,
@@ -68,7 +75,7 @@ public static unsafe class CurrencyState
             });
         }
 
-        return currencyInfoList;
+        return CurrencyInfoScratch;
     }
 
     public static (uint Limited, uint NonLimited) GetCurrentTomestoneIds()

AetherBags/IPC/AetherBagsAPI/AetherBagsAPIImpl.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using AetherBags.IPC.ExternalCategorySystem;
+
+namespace AetherBags.IPC.AetherBagsAPI;
+
+public class AetherBagsAPIImpl : IAetherBagsAPI
+{
+    public event Action<uint>? OnItemHovered;
+    public event Action<uint>? OnItemUnhovered;
+    public event Action<uint>? OnItemClicked;
+    public event Action<string>? OnSearchChanged;
+    public event Action? OnInventoryOpened;
+    public event Action? OnInventoryClosed;
+    public event Action? OnCategoriesRefreshed;
+
+    public bool IsInventoryOpen => System.AddonInventoryWindow?.IsOpen ?? false;
+
+    public IReadOnlyList<uint> GetVisibleItemIds()
+    {
+        var window = System.AddonInventoryWindow;
+        if (window == null || !window.IsOpen) return Array.Empty<uint>();
+
+        var categories = window.GetVisibleCategories();
+        if (categories == null) return Array.Empty<uint>();
+
+        var result = new List<uint>();
+        foreach (var category in categories)
+        {
+            foreach (var item in category.Items)
+            {
+                result.Add(item.Item.ItemId);
+            }
+        }
+        return result;
+    }
+
+    public IReadOnlyList<uint> GetItemsInCategory(uint categoryKey)
+    {
+        var window = System.AddonInventoryWindow;
+        if (window == null || !window.IsOpen) return Array.Empty<uint>();
+
+        var categories = window.GetVisibleCategories();
+        if (categories == null) return Array.Empty<uint>();
+
+        var category = categories.FirstOrDefault(c => c.Key == categoryKey);
+        if (category.Items == null) return Array.Empty<uint>();
+
+        return category.Items.Select(i => i.Item.ItemId).ToList();
+    }
+
+    public bool IsItemVisible(uint itemId)
+    {
+        var window = System.AddonInventoryWindow;
+        if (window == null || !window.IsOpen) return false;
+
+        var categories = window.GetVisibleCategories();
+        if (categories == null) return false;
+
+        foreach (var category in categories)
+        {
+            if (category.Items.Any(i => i.Item.ItemId == itemId))
+                return true;
+        }
+        return false;
+    }
+
+    public string GetCurrentSearchFilter()
+    {
+        return System.AddonInventoryWindow?.GetSearchText() ?? string.Empty;
+    }
+
+    public void RegisterSource(IExternalItemSource source)
+    {
+        ExternalCategoryManager.RegisterSource(source);
+    }
+
+    public void UnregisterSource(string sourceName)
+    {
+        ExternalCategoryManager.UnregisterSource(sourceName);
+    }
+
+    public IReadOnlyList<string> GetRegisteredSourceNames()
+    {
+        return ExternalCategoryManager.RegisteredSources.Select(s => s.SourceName).ToList();
+    }
+
+    public void RaiseItemHovered(uint itemId) => OnItemHovered?.Invoke(itemId);
+    public void RaiseItemUnhovered(uint itemId) => OnItemUnhovered?.Invoke(itemId);
+    public void RaiseItemClicked(uint itemId) => OnItemClicked?.Invoke(itemId);
+    public void RaiseSearchChanged(string search) => OnSearchChanged?.Invoke(search);
+    public void RaiseInventoryOpened() => OnInventoryOpened?.Invoke();
+    public void RaiseInventoryClosed() => OnInventoryClosed?.Invoke();
+    public void RaiseCategoriesRefreshed() => OnCategoriesRefreshed?.Invoke();
+}

AetherBags/IPC/AetherBagsAPI/AetherBagsIPCProvider.cs

@@ -0,0 +1,83 @@
+using System;
+using System.Collections.Generic;
+using Dalamud.Plugin.Ipc;
+
+namespace AetherBags.IPC.AetherBagsAPI;
+
+public class AetherBagsIPCProvider : IDisposable
+{
+    private const string IpcPrefix = "AetherBags.";
+
+    private readonly AetherBagsAPIImpl _api;
+
+    private readonly ICallGateProvider<bool> _isInventoryOpen;
+    private readonly ICallGateProvider<List<uint>> _getVisibleItemIds;
+    private readonly ICallGateProvider<uint, List<uint>> _getItemsInCategory;
+    private readonly ICallGateProvider<uint, bool> _isItemVisible;
+    private readonly ICallGateProvider<string> _getSearchFilter;
+    private readonly ICallGateProvider<List<string>> _getRegisteredSources;
+
+    private readonly ICallGateProvider<uint, bool> _onItemHovered;
+    private readonly ICallGateProvider<uint, bool> _onItemUnhovered;
+    private readonly ICallGateProvider<uint, bool> _onItemClicked;
+    private readonly ICallGateProvider<string, bool> _onSearchChanged;
+    private readonly ICallGateProvider<bool> _onInventoryOpened;
+    private readonly ICallGateProvider<bool> _onInventoryClosed;
+    private readonly ICallGateProvider<bool> _onCategoriesRefreshed;
+
+    public AetherBagsAPIImpl API => _api;
+
+    public AetherBagsIPCProvider()
+    {
+        _api = new AetherBagsAPIImpl();
+
+        _isInventoryOpen = Services.PluginInterface.GetIpcProvider<bool>($"{IpcPrefix}IsInventoryOpen");
+        _getVisibleItemIds = Services.PluginInterface.GetIpcProvider<List<uint>>($"{IpcPrefix}GetVisibleItemIds");
+        _getItemsInCategory = Services.PluginInterface.GetIpcProvider<uint, List<uint>>($"{IpcPrefix}GetItemsInCategory");
+        _isItemVisible = Services.PluginInterface.GetIpcProvider<uint, bool>($"{IpcPrefix}IsItemVisible");
+        _getSearchFilter = Services.PluginInterface.GetIpcProvider<string>($"{IpcPrefix}GetSearchFilter");
+        _getRegisteredSources = Services.PluginInterface.GetIpcProvider<List<string>>($"{IpcPrefix}GetRegisteredSources");
+
+        _onItemHovered = Services.PluginInterface.GetIpcProvider<uint, bool>($"{IpcPrefix}OnItemHovered");
+        _onItemUnhovered = Services.PluginInterface.GetIpcProvider<uint, bool>($"{IpcPrefix}OnItemUnhovered");
+        _onItemClicked = Services.PluginInterface.GetIpcProvider<uint, bool>($"{IpcPrefix}OnItemClicked");
+        _onSearchChanged = Services.PluginInterface.GetIpcProvider<string, bool>($"{IpcPrefix}OnSearchChanged");
+        _onInventoryOpened = Services.PluginInterface.GetIpcProvider<bool>($"{IpcPrefix}OnInventoryOpened");
+        _onInventoryClosed = Services.PluginInterface.GetIpcProvider<bool>($"{IpcPrefix}OnInventoryClosed");
+        _onCategoriesRefreshed = Services.PluginInterface.GetIpcProvider<bool>($"{IpcPrefix}OnCategoriesRefreshed");
+
+        RegisterFunctions();
+        SubscribeEvents();
+    }
+
+    private void RegisterFunctions()
+    {
+        _isInventoryOpen.RegisterFunc(() => _api.IsInventoryOpen);
+        _getVisibleItemIds.RegisterFunc(() => new List<uint>(_api.GetVisibleItemIds()));
+        _getItemsInCategory.RegisterFunc(key => new List<uint>(_api.GetItemsInCategory(key)));
+        _isItemVisible.RegisterFunc(itemId => _api.IsItemVisible(itemId));
+        _getSearchFilter.RegisterFunc(() => _api.GetCurrentSearchFilter());
+        _getRegisteredSources.RegisterFunc(() => new List<string>(_api.GetRegisteredSourceNames()));
+    }
+
+    private void SubscribeEvents()
+    {
+        _api.OnItemHovered += itemId => _onItemHovered.SendMessage(itemId);
+        _api.OnItemUnhovered += itemId => _onItemUnhovered.SendMessage(itemId);
+        _api.OnItemClicked += itemId => _onItemClicked.SendMessage(itemId);
+        _api.OnSearchChanged += search => _onSearchChanged.SendMessage(search);
+        _api.OnInventoryOpened += () => _onInventoryOpened.SendMessage();
+        _api.OnInventoryClosed += () => _onInventoryClosed.SendMessage();
+        _api.OnCategoriesRefreshed += () => _onCategoriesRefreshed.SendMessage();
+    }
+
+    public void Dispose()
+    {
+        _isInventoryOpen.UnregisterFunc();
+        _getVisibleItemIds.UnregisterFunc();
+        _getItemsInCategory.UnregisterFunc();
+        _isItemVisible.UnregisterFunc();
+        _getSearchFilter.UnregisterFunc();
+        _getRegisteredSources.UnregisterFunc();
+    }
+}

AetherBags/IPC/AetherBagsAPI/IAetherBagsAPI.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using AetherBags.IPC.ExternalCategorySystem;
+
+namespace AetherBags.IPC.AetherBagsAPI;
+
+public interface IAetherBagsAPI
+{
+    IReadOnlyList<uint> GetVisibleItemIds();
+    IReadOnlyList<uint> GetItemsInCategory(uint categoryKey);
+    bool IsItemVisible(uint itemId);
+    string GetCurrentSearchFilter();
+    bool IsInventoryOpen { get; }
+
+    event Action<uint>? OnItemHovered;
+    event Action<uint>? OnItemUnhovered;
+    event Action<uint>? OnItemClicked;
+    event Action<string>? OnSearchChanged;
+    event Action? OnInventoryOpened;
+    event Action? OnInventoryClosed;
+    event Action? OnCategoriesRefreshed;
+
+    void RegisterSource(IExternalItemSource source);
+    void UnregisterSource(string sourceName);
+    IReadOnlyList<string> GetRegisteredSourceNames();
+}

AetherBags/IPC/AllaganToolsIPC.cs

@@ -1,8 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Numerics;
 using AetherBags.Inventory;
+using AetherBags.Inventory.Categories;
 using AetherBags.Inventory.Context;
+using AetherBags.IPC.ExternalCategorySystem;
 using Dalamud.Plugin.Ipc;
+using KamiToolKit.Classes;
 
 namespace AetherBags.IPC;
 
@@ -188,8 +192,119 @@ public class AllaganToolsIPC : IDisposable
         InventoryOrchestrator.RefreshHighlights();
     }
 
+    private AllaganToolsSource? _source;
+
+    public void EnableExternalCategorySupport()
+    {
+        if (_source != null) return;
+
+        _source = new AllaganToolsSource(this);
+        ExternalCategoryManager.RegisterSource(_source);
+    }
+
+    public void DisableExternalCategorySupport()
+    {
+        if (_source == null) return;
+
+        ExternalCategoryManager.UnregisterSource(_source.SourceName);
+        _source = null;
+    }
+
     public void Dispose()
     {
+        DisableExternalCategorySupport();
         _initialized?.Unsubscribe(OnAllaganInitialized);
     }
+
+    private sealed class AllaganToolsSource : IExternalItemSource
+    {
+        private readonly AllaganToolsIPC _ipc;
+        private int _version;
+
+        public string SourceName => "AllaganTools";
+        public string DisplayName => "Allagan Tools";
+        public int Priority => 50;
+        public bool IsReady => _ipc.IsReady;
+        public int Version => _version;
+        public event Action? OnDataChanged;
+
+        public SourceCapabilities Capabilities =>
+            SourceCapabilities.Categories |
+            SourceCapabilities.SearchTags;
+
+        public ConflictBehavior ConflictBehavior => ConflictBehavior.Defer;
+
+        public AllaganToolsSource(AllaganToolsIPC ipc)
+        {
+            _ipc = ipc;
+            _ipc.OnFiltersRefreshed += OnIpcRefreshed;
+        }
+
+        private void OnIpcRefreshed()
+        {
+            _version++;
+            OnDataChanged?.Invoke();
+        }
+
+        public IReadOnlyDictionary<uint, ExternalCategoryAssignment>? GetCategoryAssignments()
+        {
+            if (_ipc.CachedFilterItems.Count == 0) return null;
+
+            var result = new Dictionary<uint, ExternalCategoryAssignment>();
+            int filterIndex = 0;
+
+            foreach (var (filterKey, filterName) in _ipc.CachedSearchFilters)
+            {
+                if (!_ipc.CachedFilterItems.TryGetValue(filterKey, out var itemIds))
+                {
+                    filterIndex++;
+                    continue;
+                }
+
+                uint categoryKey = CategoryBucketManager.MakeAllaganFilterKey(filterIndex);
+
+                foreach (var itemId in itemIds.Keys)
+                {
+                    result.TryAdd(itemId, new ExternalCategoryAssignment(
+                        CategoryKey: categoryKey,
+                        CategoryName: $"[AT] {filterName}",
+                        CategoryDescription: $"Allagan Tools filter: {filterName}",
+                        CategoryColor: ColorHelper.GetColor(32),
+                        ItemOverlayColor: null,
+                        SubPriority: filterIndex
+                    ));
+                }
+
+                filterIndex++;
+            }
+
+            return result;
+        }
+
+        public IReadOnlyDictionary<uint, ItemDecoration>? GetItemDecorations() => null;
+
+        public IReadOnlyList<ContextMenuEntry>? GetContextMenuEntries(uint itemId) => null;
+
+        public IReadOnlyDictionary<uint, string[]>? GetSearchTags()
+        {
+            if (_ipc.ItemToFilters.Count == 0) return null;
+
+            var result = new Dictionary<uint, string[]>();
+            foreach (var (itemId, filterKeys) in _ipc.ItemToFilters)
+            {
+                var tags = new List<string>(filterKeys.Count + 1) { "at", "allagantools" };
+                foreach (var key in filterKeys)
+                {
+                    if (_ipc.CachedSearchFilters.TryGetValue(key, out var name))
+                    {
+                        tags.Add(name.ToLowerInvariant());
+                    }
+                }
+                result[itemId] = tags.ToArray();
+            }
+            return result;
+        }
+
+        public IReadOnlyList<ItemRelationship>? GetItemRelationships(uint itemId) => null;
+    }
 }

AetherBags/IPC/BisBuddyIPC.cs

@@ -2,8 +2,11 @@ using System;
 using System.Collections.Generic;
 using System.Numerics;
 using AetherBags.Inventory;
+using AetherBags.Inventory.Categories;
 using AetherBags.Inventory.Context;
+using AetherBags.IPC.ExternalCategorySystem;
 using Dalamud.Plugin.Ipc;
+using KamiToolKit.Classes;
 
 namespace AetherBags.IPC;
 
@@ -190,9 +193,157 @@ public class BisBuddyIPC : IDisposable
     public Vector4? GetItemColor(uint itemId)
         => GetBisItem(itemId)?.Color;
 
+    private BisBuddySource? _source;
+
+    public void EnableExternalCategorySupport()
+    {
+        if (_source != null) return;
+
+        _source = new BisBuddySource(this);
+        ExternalCategoryManager.RegisterSource(_source);
+    }
+
+    public void DisableExternalCategorySupport()
+    {
+        if (_source == null) return;
+
+        ExternalCategoryManager.UnregisterSource(_source.SourceName);
+        _source = null;
+    }
+
     public void Dispose()
     {
+        DisableExternalCategorySupport();
         _initialized?.Unsubscribe(OnBisBuddyInitialized);
         _inventoryHighlightItemsChanged?.Unsubscribe(OnInventoryHighlightItemsChanged);
     }
+
+    private sealed class BisBuddySource : IExternalItemSource
+    {
+        private readonly BisBuddyIPC _ipc;
+        private int _version;
+
+        public string SourceName => "BisBuddy";
+        public string DisplayName => "Best in Slot";
+        public int Priority => 100;
+        public bool IsReady => _ipc.IsReady;
+        public int Version => _version;
+        public event Action? OnDataChanged;
+
+        public SourceCapabilities Capabilities =>
+            SourceCapabilities.Categories |
+            SourceCapabilities.ItemColors |
+            SourceCapabilities.SearchTags |
+            SourceCapabilities.Relationships;
+
+        public ConflictBehavior ConflictBehavior => ConflictBehavior.Replace;
+
+        public BisBuddySource(BisBuddyIPC ipc)
+        {
+            _ipc = ipc;
+            _ipc.OnItemsRefreshed += OnIpcRefreshed;
+        }
+
+        private void OnIpcRefreshed()
+        {
+            _version++;
+            OnDataChanged?.Invoke();
+        }
+
+        public IReadOnlyDictionary<uint, ExternalCategoryAssignment>? GetCategoryAssignments()
+        {
+            var items = _ipc.ItemLookup;
+            if (items.Count == 0) return null;
+
+            var result = new Dictionary<uint, ExternalCategoryAssignment>();
+
+            var colorGroups = new Dictionary<Vector4, List<(uint itemId, BisItemEntry entry)>>();
+            foreach (var (itemId, entry) in items)
+            {
+                if (!colorGroups.TryGetValue(entry.Color, out var list))
+                {
+                    list = new List<(uint, BisItemEntry)>();
+                    colorGroups[entry.Color] = list;
+                }
+                list.Add((itemId, entry));
+            }
+
+            uint subKey = 0;
+            foreach (var (color, groupItems) in colorGroups)
+            {
+                uint categoryKey = CategoryBucketManager.MakeBisBuddyKey() | subKey++;
+
+                foreach (var (itemId, entry) in groupItems)
+                {
+                    result[itemId] = new ExternalCategoryAssignment(
+                        CategoryKey: categoryKey,
+                        CategoryName: "[BiS] Gearset",
+                        CategoryDescription: "Items needed for Best in Slot",
+                        CategoryColor: color,
+                        ItemOverlayColor: new Vector3(color.X, color.Y, color.Z),
+                        SubPriority: 0
+                    );
+                }
+            }
+
+            return result;
+        }
+
+        public IReadOnlyDictionary<uint, ItemDecoration>? GetItemDecorations()
+        {
+            var items = _ipc.ItemLookup;
+            if (items.Count == 0) return null;
+
+            var result = new Dictionary<uint, ItemDecoration>();
+            foreach (var (itemId, entry) in items)
+            {
+                result[itemId] = new ItemDecoration
+                {
+                    OverlayColor = new Vector3(entry.Color.X, entry.Color.Y, entry.Color.Z),
+                };
+            }
+            return result;
+        }
+
+        public IReadOnlyList<ContextMenuEntry>? GetContextMenuEntries(uint itemId) => null;
+
+        public IReadOnlyDictionary<uint, string[]>? GetSearchTags()
+        {
+            var items = _ipc.ItemLookup;
+            if (items.Count == 0) return null;
+
+            var result = new Dictionary<uint, string[]>();
+            foreach (var itemId in items.Keys)
+            {
+                result[itemId] = new[] { "bis", "bestinslot", "gearset" };
+            }
+            return result;
+        }
+
+        public IReadOnlyList<ItemRelationship>? GetItemRelationships(uint itemId)
+        {
+            if (!_ipc.ItemLookup.TryGetValue(itemId, out var entry)) return null;
+
+            var sameSetItems = new List<uint>();
+            foreach (var (otherId, otherEntry) in _ipc.ItemLookup)
+            {
+                if (otherId != itemId && otherEntry.Color == entry.Color)
+                {
+                    sameSetItems.Add(otherId);
+                }
+            }
+
+            if (sameSetItems.Count == 0) return null;
+
+            return new[]
+            {
+                new ItemRelationship(
+                    Type: RelationshipType.SameSet,
+                    RelatedItemIds: sameSetItems.ToArray(),
+                    GroupLabel: "Same Gearset",
+                    HighlightColor: new Vector3(entry.Color.X, entry.Color.Y, entry.Color.Z)
+                )
+            };
+        }
+    }
 }

AetherBags/IPC/ExternalCategorySystem/ExternalCategoryManager.cs

@@ -0,0 +1,297 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Runtime.InteropServices;
+using AetherBags.Inventory.Categories;
+using AetherBags.Inventory.Items;
+
+namespace AetherBags.IPC.ExternalCategorySystem;
+
+public static class ExternalCategoryManager
+{
+    private static readonly List<IExternalItemSource> Sources = new();
+    private static readonly Dictionary<uint, ExternalCategoryAssignment> CategoryCache = new();
+    private static readonly Dictionary<uint, ItemDecoration> DecorationCache = new();
+    private static readonly Dictionary<uint, List<string>> SearchTagCache = new();
+    private static int _lastCombinedVersion;
+
+    public static IReadOnlyList<IExternalItemSource> RegisteredSources => Sources;
+
+    public static void RegisterSource(IExternalItemSource source)
+    {
+        if (Sources.Any(s => s.SourceName == source.SourceName))
+            return;
+
+        Sources.Add(source);
+        Sources.Sort((a, b) => b.Priority.CompareTo(a.Priority));
+        source.OnDataChanged += InvalidateCache;
+        InvalidateCache();
+
+        Services.Logger.Information($"Registered external category source: {source.SourceName}");
+    }
+
+    public static void UnregisterSource(string sourceName)
+    {
+        var source = Sources.FirstOrDefault(s => s.SourceName == sourceName);
+        if (source == null) return;
+
+        source.OnDataChanged -= InvalidateCache;
+        Sources.Remove(source);
+        InvalidateCache();
+
+        Services.Logger.Information($"Unregistered external category source: {sourceName}");
+    }
+
+    public static void InvalidateCache()
+    {
+        _lastCombinedVersion = -1;
+        CategoryCache.Clear();
+        DecorationCache.Clear();
+        SearchTagCache.Clear();
+    }
+
+    private static int ComputeCombinedVersion()
+    {
+        int version = 0;
+        foreach (var source in Sources)
+            version = unchecked(version * 31 + source.Version);
+        return version;
+    }
+
+    public static void RebuildCacheIfNeeded()
+    {
+        int currentVersion = ComputeCombinedVersion();
+        if (currentVersion == _lastCombinedVersion && CategoryCache.Count > 0)
+            return;
+
+        _lastCombinedVersion = currentVersion;
+        CategoryCache.Clear();
+        DecorationCache.Clear();
+        SearchTagCache.Clear();
+
+        foreach (var source in Sources)
+        {
+            if (!source.IsReady) continue;
+
+            if (source.Capabilities.HasFlag(SourceCapabilities.Categories))
+            {
+                var categories = source.GetCategoryAssignments();
+                if (categories != null)
+                {
+                    foreach (var (itemId, assignment) in categories)
+                    {
+                        CategoryCache.TryAdd(itemId, assignment);
+                    }
+                }
+            }
+
+            if (source.Capabilities.HasFlag(SourceCapabilities.ItemColors) ||
+                source.Capabilities.HasFlag(SourceCapabilities.Badges))
+            {
+                var decorations = source.GetItemDecorations();
+                if (decorations != null)
+                {
+                    foreach (var (itemId, decoration) in decorations)
+                    {
+                        if (DecorationCache.TryGetValue(itemId, out var existing))
+                        {
+                            DecorationCache[itemId] = MergeDecorations(existing, decoration, source.ConflictBehavior);
+                        }
+                        else
+                        {
+                            DecorationCache[itemId] = decoration;
+                        }
+                    }
+                }
+            }
+
+            if (source.Capabilities.HasFlag(SourceCapabilities.SearchTags))
+            {
+                var searchTags = source.GetSearchTags();
+                if (searchTags != null)
+                {
+                    foreach (var (itemId, tags) in searchTags)
+                    {
+                        if (!SearchTagCache.TryGetValue(itemId, out var existingTags))
+                        {
+                            existingTags = new List<string>(tags.Length);
+                            SearchTagCache[itemId] = existingTags;
+                        }
+                        existingTags.AddRange(tags);
+                    }
+                }
+            }
+        }
+    }
+
+    private static ItemDecoration MergeDecorations(ItemDecoration existing, ItemDecoration incoming, ConflictBehavior behavior)
+    {
+        return behavior switch
+        {
+            ConflictBehavior.Replace => incoming,
+            ConflictBehavior.Defer => existing,
+            ConflictBehavior.Merge => new ItemDecoration
+            {
+                OverlayColor = incoming.OverlayColor ?? existing.OverlayColor,
+                Opacity = incoming.Opacity ?? existing.Opacity,
+                Badge = incoming.Badge ?? existing.Badge,
+                Border = incoming.Border != BorderStyle.None ? incoming.Border : existing.Border,
+                TooltipLine = CombineTooltips(existing.TooltipLine, incoming.TooltipLine),
+            },
+            _ => incoming
+        };
+    }
+
+    private static string? CombineTooltips(string? a, string? b)
+    {
+        if (string.IsNullOrEmpty(a)) return b;
+        if (string.IsNullOrEmpty(b)) return a;
+        return $"{a}\n{b}";
+    }
+
+    public static void BucketItems(
+        Dictionary<ulong, ItemInfo> itemInfoByKey,
+        Dictionary<uint, CategoryBucket> bucketsByKey,
+        HashSet<ulong> claimedKeys)
+    {
+        RebuildCacheIfNeeded();
+
+        if (CategoryCache.Count == 0) return;
+
+        foreach (var (itemKey, item) in itemInfoByKey)
+        {
+            if (claimedKeys.Contains(itemKey)) continue;
+
+            if (!CategoryCache.TryGetValue(item.Item.ItemId, out var assignment))
+                continue;
+
+            ref var bucketRef = ref CollectionsMarshal.GetValueRefOrAddDefault(bucketsByKey, assignment.CategoryKey, out bool exists);
+
+            if (!exists)
+            {
+                bucketRef = new CategoryBucket
+                {
+                    Key = assignment.CategoryKey,
+                    Category = new CategoryInfo
+                    {
+                        Name = assignment.CategoryName,
+                        Description = assignment.CategoryDescription ?? string.Empty,
+                        Color = assignment.CategoryColor,
+                    },
+                    Items = new List<ItemInfo>(16),
+                    FilteredItems = new List<ItemInfo>(16),
+                    Used = true,
+                };
+            }
+            else
+            {
+                bucketRef!.Used = true;
+                bucketRef.Category.Name = assignment.CategoryName;
+                bucketRef.Category.Description = assignment.CategoryDescription ?? string.Empty;
+                bucketRef.Category.Color = assignment.CategoryColor;
+            }
+
+            bucketRef!.Items.Add(item);
+            claimedKeys.Add(itemKey);
+        }
+    }
+
+    public static ItemDecoration? GetDecoration(uint itemId)
+    {
+        RebuildCacheIfNeeded();
+        return DecorationCache.TryGetValue(itemId, out var dec) ? dec : null;
+    }
+
+    public static Vector3? GetItemOverlayColor(uint itemId)
+    {
+        if (CategoryCache.TryGetValue(itemId, out var assignment))
+            return assignment.ItemOverlayColor;
+
+        if (DecorationCache.TryGetValue(itemId, out var decoration))
+            return decoration.OverlayColor;
+
+        return null;
+    }
+
+    public static List<ContextMenuEntry>? GetContextMenuEntries(uint itemId)
+    {
+        List<ContextMenuEntry>? result = null;
+
+        foreach (var source in Sources)
+        {
+            if (!source.IsReady) continue;
+            if (!source.Capabilities.HasFlag(SourceCapabilities.ContextMenu)) continue;
+
+            var entries = source.GetContextMenuEntries(itemId);
+            if (entries == null || entries.Count == 0) continue;
+
+            foreach (var entry in entries)
+            {
+                if (entry.IsVisible != null && !entry.IsVisible(itemId)) continue;
+
+                result ??= new List<ContextMenuEntry>(4);
+                result.Add(entry);
+            }
+        }
+
+        result?.Sort((a, b) => a.Order.CompareTo(b.Order));
+        return result;
+    }
+
+    public static IReadOnlyList<string>? GetSearchTags(uint itemId)
+    {
+        RebuildCacheIfNeeded();
+        return SearchTagCache.TryGetValue(itemId, out var tags) ? tags : null;
+    }
+
+    public static bool MatchesSearchTag(uint itemId, string searchText)
+    {
+        RebuildCacheIfNeeded();
+        if (!SearchTagCache.TryGetValue(itemId, out var tags)) return false;
+
+        foreach (var tag in tags)
+        {
+            if (tag.Contains(searchText, global::System.StringComparison.OrdinalIgnoreCase))
+                return true;
+        }
+        return false;
+    }
+
+    public static List<ItemRelationship>? GetItemRelationships(uint itemId)
+    {
+        List<ItemRelationship>? result = null;
+
+        foreach (var source in Sources)
+        {
+            if (!source.IsReady) continue;
+            if (!source.Capabilities.HasFlag(SourceCapabilities.Relationships)) continue;
+
+            var relationships = source.GetItemRelationships(itemId);
+            if (relationships == null || relationships.Count == 0) continue;
+
+            result ??= new List<ItemRelationship>(4);
+            result.AddRange(relationships);
+        }
+
+        return result;
+    }
+
+    public static HashSet<uint>? GetRelatedItemIds(uint itemId, RelationshipType? filterType = null)
+    {
+        var relationships = GetItemRelationships(itemId);
+        if (relationships == null || relationships.Count == 0) return null;
+
+        var result = new HashSet<uint>();
+        foreach (var rel in relationships)
+        {
+            if (filterType.HasValue && rel.Type != filterType.Value) continue;
+
+            foreach (var relatedId in rel.RelatedItemIds)
+            {
+                result.Add(relatedId);
+            }
+        }
+
+        return result.Count > 0 ? result : null;
+    }
+}

AetherBags/IPC/ExternalCategorySystem/IExternalItemSource.cs

@@ -0,0 +1,103 @@
+using System;
+using System.Collections.Generic;
+using System.Numerics;
+
+namespace AetherBags.IPC.ExternalCategorySystem;
+
+public interface IExternalItemSource
+{
+    string SourceName { get; }
+    string DisplayName { get; }
+    int Priority { get; }
+    bool IsReady { get; }
+
+    int Version { get; }
+    event Action? OnDataChanged;
+
+    SourceCapabilities Capabilities { get; }
+    ConflictBehavior ConflictBehavior { get; }
+
+    IReadOnlyDictionary<uint, ExternalCategoryAssignment>? GetCategoryAssignments();
+    IReadOnlyDictionary<uint, ItemDecoration>? GetItemDecorations();
+    IReadOnlyList<ContextMenuEntry>? GetContextMenuEntries(uint itemId);
+    IReadOnlyDictionary<uint, string[]>? GetSearchTags();
+    IReadOnlyList<ItemRelationship>? GetItemRelationships(uint itemId);
+}
+
+[Flags]
+public enum SourceCapabilities
+{
+    None = 0,
+    Categories = 1,
+    ItemColors = 2,
+    Badges = 4,
+    ContextMenu = 8,
+    SearchTags = 16,
+    Relationships = 32,
+    Tooltips = 64
+}
+
+public enum ConflictBehavior
+{
+    Replace,
+    Merge,
+    Defer
+}
+
+public readonly record struct ExternalCategoryAssignment(
+    uint CategoryKey,
+    string CategoryName,
+    string? CategoryDescription,
+    Vector4 CategoryColor,
+    Vector3? ItemOverlayColor,
+    int SubPriority
+);
+
+public record struct ItemDecoration
+{
+    public Vector3? OverlayColor { get; init; }
+    public float? Opacity { get; init; }
+    public BadgeInfo? Badge { get; init; }
+    public BorderStyle Border { get; init; }
+    public string? TooltipLine { get; init; }
+}
+
+public record struct BadgeInfo(
+    uint IconId,
+    BadgePosition Position,
+    Vector4? TintColor
+);
+
+public enum BadgePosition { TopLeft, TopRight, BottomLeft, BottomRight }
+public enum BorderStyle { None, Solid, Glow, Pulse }
+
+public record struct ContextMenuEntry(
+    string Label,
+    uint? IconId,
+    Action<ContextMenuContext> OnClick,
+    int Order,
+    Func<uint, bool>? IsVisible = null
+);
+
+public record struct ContextMenuContext(
+    uint ItemId,
+    int Container,
+    int Slot
+);
+
+public record struct ItemRelationship(
+    RelationshipType Type,
+    uint[] RelatedItemIds,
+    string? GroupLabel,
+    Vector3? HighlightColor
+);
+
+public enum RelationshipType
+{
+    SameSet,
+    Upgrades,
+    UpgradedFrom,
+    CraftedFrom,
+    CraftsInto,
+    Alternative
+}

AetherBags/IPC/IPCService.cs

@@ -1,4 +1,5 @@
 using System;
+using AetherBags.Configuration;
 
 namespace AetherBags.IPC;
 
@@ -8,6 +9,42 @@ public class IPCService : IDisposable
     public WotsItIPC WotsIt { get; } = new();
     public BisBuddyIPC BisBuddy { get; } = new();
 
+    private bool _unifiedEnabled;
+
+    public void UpdateUnifiedCategorySupport(bool enabled)
+    {
+        _unifiedEnabled = enabled;
+        RefreshExternalSources();
+    }
+
+    public void RefreshExternalSources()
+    {
+        var config = System.Config?.Categories;
+        if (config == null) return;
+
+        bool categoriesEnabled = config.CategoriesEnabled;
+
+        bool allaganShouldBeActive = _unifiedEnabled &&
+                                      categoriesEnabled &&
+                                      config.AllaganToolsCategoriesEnabled &&
+                                      config.AllaganToolsFilterMode == PluginFilterMode.Categorize;
+
+        if (allaganShouldBeActive)
+            AllaganTools.EnableExternalCategorySupport();
+        else
+            AllaganTools.DisableExternalCategorySupport();
+
+        bool bisBuddyShouldBeActive = _unifiedEnabled &&
+                                       categoriesEnabled &&
+                                       config.BisBuddyEnabled &&
+                                       config.BisBuddyMode == PluginFilterMode.Categorize;
+
+        if (bisBuddyShouldBeActive)
+            BisBuddy.EnableExternalCategorySupport();
+        else
+            BisBuddy.DisableExternalCategorySupport();
+    }
+
     public void Dispose()
     {
         AllaganTools.Dispose();

AetherBags/Inventory/Categories/CategoryBucketManager.cs

@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using AetherBags.Configuration;
 using AetherBags.Inventory.Items;
 using KamiToolKit.Classes;
@@ -61,32 +63,24 @@ public static class CategoryBucketManager
     {
         sortedScratch.Clear();
         sortedScratch.AddRange(userCategories);
-        sortedScratch.Sort((left, right) =>
-        {
-            int priority = left.Priority.CompareTo(right.Priority);
-            if (priority != 0) return priority;
+        sortedScratch.Sort(UserCategoryComparer.Instance);
 
-            int order = left.Order.CompareTo(right.Order);
-            if (order != 0) return order;
-
-            return string.Compare(left.Id, right.Id, StringComparison.OrdinalIgnoreCase);
-        });
+        var activeBuckets = new (uint key, CategoryBucket bucket, UserCategoryDefinition def)[sortedScratch.Count];
+        int activeCount = 0;
 
         for (int i = 0; i < sortedScratch.Count; i++)
         {
             UserCategoryDefinition category = sortedScratch[i];
 
-            if (!category.Enabled)
-                continue;
-
-            if (UserCategoryMatcher.IsCatchAll(category))
+            if (!category.Enabled || UserCategoryMatcher.IsCatchAll(category))
                 continue;
 
             uint bucketKey = MakeUserCategoryKey(category.Order);
+            ref var bucketRef = ref CollectionsMarshal.GetValueRefOrAddDefault(bucketsByKey, bucketKey, out bool exists);
 
-            if (!bucketsByKey.TryGetValue(bucketKey, out CategoryBucket? bucket))
+            if (!exists)
             {
-                bucket = new CategoryBucket
+                bucketRef = new CategoryBucket
                 {
                     Key = bucketKey,
                     Category = new CategoryInfo
@@ -100,34 +94,63 @@ public static class CategoryBucketManager
                     FilteredItems = new List<ItemInfo>(capacity: 16),
                     Used = true,
                 };
-                bucketsByKey.Add(bucketKey, bucket);
             }
             else
             {
-                bucket.Used = true;
-                bucket.Category.Name = category.Name;
-                bucket.Category.Description = category.Description;
-                bucket.Category.Color = category.Color;
-                bucket.Category.IsPinned = category.Pinned;
+                bucketRef!.Used = true;
+                bucketRef.Category.Name = category.Name;
+                bucketRef.Category.Description = category.Description;
+                bucketRef.Category.Color = category.Color;
+                bucketRef.Category.IsPinned = category.Pinned;
+            }
+
+            activeBuckets[activeCount++] = (bucketKey, bucketRef!, category);
         }
 
         foreach (var itemKvp in itemInfoByKey)
         {
             ulong itemKey = itemKvp.Key;
-                ItemInfo item = itemKvp.Value;
-
             if (claimedKeys.Contains(itemKey))
                 continue;
 
-                if (UserCategoryMatcher.Matches(item, category))
+            ItemInfo item = itemKvp.Value;
+
+            for (int i = 0; i < activeCount; i++)
             {
-                    bucket.Items.Add(item);
+                ref var entry = ref activeBuckets[i];
+                if (UserCategoryMatcher.Matches(item, entry.def))
+                {
+                    entry.bucket.Items.Add(item);
                     claimedKeys.Add(itemKey);
+                    break;
+                }
             }
         }
 
-            if (bucket.Items.Count == 0)
-                bucket.Used = false;
+        for (int i = 0; i < activeCount; i++)
+        {
+            ref var entry = ref activeBuckets[i];
+            if (entry.bucket.Items.Count == 0)
+                entry.bucket.Used = false;
+        }
+    }
+
+    private sealed class UserCategoryComparer : IComparer<UserCategoryDefinition>
+    {
+        public static readonly UserCategoryComparer Instance = new();
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public int Compare(UserCategoryDefinition? left, UserCategoryDefinition? right)
+        {
+            if (left is null || right is null) return 0;
+
+            int priority = left.Priority.CompareTo(right.Priority);
+            if (priority != 0) return priority;
+
+            int order = left.Order.CompareTo(right.Order);
+            if (order != 0) return order;
+
+            return string.Compare(left.Id, right.Id, StringComparison.OrdinalIgnoreCase);
         }
     }
 
@@ -147,9 +170,11 @@ public static class CategoryBucketManager
 
             uint categoryKey = info.UiCategory.RowId;
 
-            if (!bucketsByKey.TryGetValue(categoryKey, out CategoryBucket? bucket))
+            ref var bucketRef = ref CollectionsMarshal.GetValueRefOrAddDefault(bucketsByKey, categoryKey, out bool exists);
+
+            if (!exists)
             {
-                bucket = new CategoryBucket
+                bucketRef = new CategoryBucket
                 {
                     Key = categoryKey,
                     Category = GetCategoryInfoCached(categoryKey, info),
@@ -157,14 +182,13 @@ public static class CategoryBucketManager
                     FilteredItems = new List<ItemInfo>(capacity: 16),
                     Used = true,
                 };
-                bucketsByKey.Add(categoryKey, bucket);
             }
             else
             {
-                bucket.Used = true;
+                bucketRef!.Used = true;
             }
 
-            bucket.Items.Add(info);
+            bucketRef!.Items.Add(info);
         }
     }
 
@@ -178,22 +202,26 @@ public static class CategoryBucketManager
         if (!System.IPC.AllaganTools.IsReady) return;
 
         var filters = System.IPC.AllaganTools.CachedSearchFilters;
-        var filterItems = System.IPC.AllaganTools.CachedFilterItems;
+        var itemToFilters = System.IPC.AllaganTools.ItemToFilters;
 
+        if (filters.Count == 0 || itemToFilters.Count == 0) return;
+
+        var filterKeyToIndex = new Dictionary<string, int>(filters.Count);
         int index = 0;
-        foreach (var (filterKey, filterName) in filters)
+        foreach (var filterKey in filters.Keys)
         {
-            if (!filterItems. TryGetValue(filterKey, out var itemIds))
-            {
-                index++;
-                continue;
+            filterKeyToIndex[filterKey] = index++;
         }
 
-            uint bucketKey = MakeAllaganFilterKey(index);
-
-            if (!bucketsByKey.TryGetValue(bucketKey, out CategoryBucket?  bucket))
+        index = 0;
+        foreach (var (filterKey, filterName) in filters)
         {
-                bucket = new CategoryBucket
+            uint bucketKey = MakeAllaganFilterKey(index);
+            ref var bucketRef = ref CollectionsMarshal.GetValueRefOrAddDefault(bucketsByKey, bucketKey, out bool exists);
+
+            if (!exists)
+            {
+                bucketRef = new CategoryBucket
                 {
                     Key = bucketKey,
                     Category = new CategoryInfo
@@ -206,33 +234,44 @@ public static class CategoryBucketManager
                     FilteredItems = new List<ItemInfo>(capacity: 16),
                     Used = true,
                 };
-                bucketsByKey. Add(bucketKey, bucket);
             }
             else
             {
-                bucket.Used = true;
-                bucket.Category.Name = $"[AT] {filterName}";
+                bucketRef!.Used = true;
+                bucketRef.Category.Name = $"[AT] {filterName}";
+            }
+
+            index++;
         }
 
         foreach (var itemKvp in itemInfoByKey)
         {
             ulong itemKey = itemKvp.Key;
-                ItemInfo item = itemKvp.Value;
-
             if (claimedKeys.Contains(itemKey))
                 continue;
 
-                if (itemIds.ContainsKey(item.Item.ItemId))
+            ItemInfo item = itemKvp.Value;
+
+            if (!itemToFilters.TryGetValue(item.Item.ItemId, out var filterKeys))
+                continue;
+
+            if (filterKeys.Count > 0 && filterKeyToIndex.TryGetValue(filterKeys[0], out int filterIndex))
+            {
+                uint bucketKey = MakeAllaganFilterKey(filterIndex);
+                if (bucketsByKey.TryGetValue(bucketKey, out var bucket))
                 {
                     bucket.Items.Add(item);
                     claimedKeys.Add(itemKey);
                 }
             }
+        }
 
-            if (bucket.Items.Count == 0)
+        index = 0;
+        foreach (var _ in filters)
+        {
+            uint bucketKey = MakeAllaganFilterKey(index++);
+            if (bucketsByKey.TryGetValue(bucketKey, out var bucket) && bucket.Items.Count == 0)
                 bucket.Used = false;
-
-            index++;
         }
     }
 
@@ -250,9 +289,11 @@ public static class CategoryBucketManager
 
         uint bucketKey = MakeBisBuddyKey();
 
-        if (!bucketsByKey.TryGetValue(bucketKey, out CategoryBucket? bucket))
+        ref var bucketRef = ref CollectionsMarshal.GetValueRefOrAddDefault(bucketsByKey, bucketKey, out bool exists);
+
+        if (!exists)
         {
-            bucket = new CategoryBucket
+            bucketRef = new CategoryBucket
             {
                 Key = bucketKey,
                 Category = new CategoryInfo
@@ -265,21 +306,22 @@ public static class CategoryBucketManager
                 FilteredItems = new List<ItemInfo>(capacity: 16),
                 Used = true,
             };
-            bucketsByKey.Add(bucketKey, bucket);
         }
         else
         {
-            bucket.Used = true;
+            bucketRef!.Used = true;
         }
 
+        var bucket = bucketRef!;
+
         foreach (var itemKvp in itemInfoByKey)
         {
             ulong itemKey = itemKvp.Key;
-            ItemInfo item = itemKvp.Value;
-
             if (claimedKeys.Contains(itemKey))
                 continue;
 
+            ItemInfo item = itemKvp.Value;
+
             if (bisItems.ContainsKey(item.Item.ItemId))
             {
                 bucket.Items.Add(item);

AetherBags/Inventory/Categories/UserCategoryMatcher.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 using AetherBags.Configuration;
 using AetherBags.Helpers;
 using AetherBags.Inventory.Items;
@@ -7,51 +8,20 @@ namespace AetherBags.Inventory.Categories;
 
 internal static class UserCategoryMatcher
 {
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static bool Matches(ItemInfo item, UserCategoryDefinition userCategory)
     {
         var rules = userCategory.Rules;
 
-        bool hasIdentificationFilters = rules.AllowedItemIds.Count > 0 || rules.AllowedItemNamePatterns.Count > 0;
-
-        if (hasIdentificationFilters)
-        {
-            bool matchesAnyIdentification = false;
-
-            if (rules.AllowedItemIds.Count > 0 && rules.AllowedItemIds.Contains(item.Item.ItemId))
-            {
-                matchesAnyIdentification = true;
-            }
-
-            if (!matchesAnyIdentification && rules.AllowedItemNamePatterns.Count > 0)
-            {
-                for (int i = 0; i < rules.AllowedItemNamePatterns.Count; i++)
-                {
-                    string pattern = rules.AllowedItemNamePatterns[i];
-                    if (string.IsNullOrWhiteSpace(pattern))
-                        continue;
-
-                    var regex = RegexCache.GetOrCreate(pattern);
-                    if (regex != null && regex.IsMatch(item.Name))
-                    {
-                        matchesAnyIdentification = true;
-                        break;
-                    }
-                }
-            }
-
-            if (!matchesAnyIdentification)
-                return false;
-        }
-
-        if (rules.AllowedUiCategoryIds.Count > 0)
-        {
-            uint uiCategoryId = item.UiCategory.RowId;
-            if (!rules.AllowedUiCategoryIds.Contains(uiCategoryId))
-                return false;
-        }
-
-        if (rules.AllowedRarities.Count > 0 && !rules.AllowedRarities.Contains(item.Rarity))
-            return false;
+        if (!MatchesToggle(rules.Untradable, item.IsUntradable)) return false;
+        if (!MatchesToggle(rules.Unique, item.IsUnique)) return false;
+        if (!MatchesToggle(rules.Collectable, item.IsCollectable)) return false;
+        if (!MatchesToggle(rules.Dyeable, item.IsDyeable)) return false;
+        if (!MatchesToggle(rules.HighQuality, item.IsHq)) return false;
+        if (!MatchesToggle(rules.Repairable, item.IsRepairable)) return false;
+        if (!MatchesToggle(rules.Desynthesizable, item.IsDesynthesizable)) return false;
+        if (!MatchesToggle(rules.Glamourable, item.IsGlamourable)) return false;
+        if (!MatchesToggle(rules.FullySpiritbonded, item.IsSpiritbonded)) return false;
 
         if (rules.Level.Enabled && !InRange(item.Level, rules.Level.Min, rules.Level.Max))
             return false;
@@ -62,19 +32,40 @@ internal static class UserCategoryMatcher
         if (rules.VendorPrice.Enabled && !InRange(item.VendorPrice, rules.VendorPrice.Min, rules.VendorPrice.Max))
             return false;
 
-        if (!MatchesToggle(rules.Untradable, item.IsUntradable)) return false;
-        if (!MatchesToggle(rules.Unique, item.IsUnique)) return false;
-        if (!MatchesToggle(rules.Collectable, item.IsCollectable)) return false;
-        if (!MatchesToggle(rules.Dyeable, item.IsDyeable)) return false;
-        if (!MatchesToggle(rules.Repairable, item.IsRepairable)) return false;
-        if (!MatchesToggle(rules.HighQuality, item.IsHq)) return false;
-        if (!MatchesToggle(rules.Desynthesizable, item.IsDesynthesizable)) return false;
-        if (!MatchesToggle(rules.Glamourable, item.IsGlamourable)) return false;
-        if (!MatchesToggle(rules.FullySpiritbonded, item.IsSpiritbonded)) return false;
+        if (rules.AllowedRarities.Count > 0 && !rules.AllowedRarities.Contains(item.Rarity))
+            return false;
+
+        if (rules.AllowedUiCategoryIds.Count > 0 && !rules.AllowedUiCategoryIds.Contains(item.UiCategory.RowId))
+            return false;
+
+        bool hasIdentificationFilters = rules.AllowedItemIds.Count > 0 || rules.AllowedItemNamePatterns.Count > 0;
+
+        if (hasIdentificationFilters)
+        {
+            if (rules.AllowedItemIds.Count > 0 && rules.AllowedItemIds.Contains(item.Item.ItemId))
+                return true;
+
+            if (rules.AllowedItemNamePatterns.Count > 0)
+            {
+                for (int i = 0; i < rules.AllowedItemNamePatterns.Count; i++)
+                {
+                    string pattern = rules.AllowedItemNamePatterns[i];
+                    if (string.IsNullOrWhiteSpace(pattern))
+                        continue;
+
+                    var regex = RegexCache.GetOrCreate(pattern);
+                    if (regex != null && regex.IsMatch(item.Name))
+                        return true;
+                }
+            }
+
+            return false;
+        }
 
         return true;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static bool InRange<T>(T value, T min, T max) where T : struct, IComparable<T>
         => value.CompareTo(min) >= 0 && value.CompareTo(max) <= 0;
 
@@ -112,12 +103,13 @@ internal static class UserCategoryMatcher
         return true;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static bool MatchesToggle(StateFilter filter, bool itemHasProperty)
-        => filter.ToggleState switch
     {
-            ToggleFilterState.Ignored => true,
-            ToggleFilterState.Allow => itemHasProperty,
-            ToggleFilterState.Disallow => !itemHasProperty,
-            _ => true
-        };
+        var state = filter.ToggleState;
+        if (state == ToggleFilterState.Ignored) return true;
+        if (state == ToggleFilterState.Allow) return itemHasProperty;
+        if (state == ToggleFilterState.Disallow) return !itemHasProperty;
+        return true;
+    }
 }

AetherBags/Inventory/Context/HighlightState.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Numerics;
+using System.Runtime.CompilerServices;
 
 namespace AetherBags.Inventory.Context;
 
@@ -8,6 +9,7 @@ public enum HighlightSource
     Search,
     AllaganTools,
     BiSBuddy,
+    Relationship,
 }
 
 public record HighlightEntry(uint ItemId, Vector3 Color);
@@ -40,6 +42,7 @@ public static class HighlightState
         _version++;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static bool IsInActiveFilters(uint itemId)
     {
         if (Filters.Count == 0) return true;
@@ -48,6 +51,7 @@ public static class HighlightState
         return false;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static HighlightEntry? GetHighlightEntry(uint itemId)
     {
         EnsureCacheValid();
@@ -88,6 +92,7 @@ public static class HighlightState
         _version++;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static Vector3? GetLabelColor(uint itemId)
         => GetHighlightEntry(itemId)?.Color;
 
@@ -168,4 +173,16 @@ public static class HighlightState
         PerItemLabels.Remove(source);
         InvalidateCache();
     }
+
+    public static void SetRelationshipHighlight(HashSet<uint>? relatedItemIds, Vector3? color)
+    {
+        if (relatedItemIds == null || relatedItemIds.Count == 0)
+        {
+            ClearLabel(HighlightSource.Relationship);
+            return;
+        }
+
+        var highlightColor = color ?? new Vector3(0.3f, 0.6f, 0.9f);
+        SetLabel(HighlightSource.Relationship, relatedItemIds, highlightColor);
+    }
 }

AetherBags/Inventory/Items/ItemInfo.cs

@@ -1,8 +1,10 @@
 using System;
 using System.Numerics;
+using System.Runtime.CompilerServices;
 using System.Text.RegularExpressions;
 using AetherBags.Helpers;
 using AetherBags.Inventory.Context;
+using AetherBags.IPC.ExternalCategorySystem;
 using FFXIVClientStructs.FFXIV.Client.Game;
 using Lumina.Excel;
 using Lumina.Excel.Sheets;
@@ -30,6 +32,7 @@ public sealed class ItemInfo : IEquatable<ItemInfo>
     private int _cachedHighlightVersion = -1;
     private float _cachedVisualAlpha;
     private Vector3 _cachedHighlightColor;
+    private bool _cachedIsRelationshipHighlighted;
 
     private ref readonly Item Row
     {
@@ -117,6 +120,15 @@ public sealed class ItemInfo : IEquatable<ItemInfo>
         }
     }
 
+    public bool IsRelationshipHighlighted
+    {
+        get
+        {
+            EnsureVisualStateCached();
+            return _cachedIsRelationshipHighlighted;
+        }
+    }
+
     private void EnsureVisualStateCached()
     {
         int currentVersion = HighlightState.Version;
@@ -127,6 +139,10 @@ public sealed class ItemInfo : IEquatable<ItemInfo>
         _cachedHighlightColor = System.Config.Categories.BisBuddyEnabled
             ? HighlightState.GetLabelColor(Item.ItemId) ?? Vector3.Zero
             : Vector3.Zero;
+
+        var entry = HighlightState.GetHighlightEntry(Item.ItemId);
+        _cachedIsRelationshipHighlighted = entry != null;
+
         _cachedHighlightVersion = currentVersion;
     }
 
@@ -160,6 +176,7 @@ public sealed class ItemInfo : IEquatable<ItemInfo>
 
     public bool IsMainInventory => InventoryPage >= 0;
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public bool IsRegexMatch(string searchTerms)
     {
         if (string.IsNullOrEmpty(searchTerms))
@@ -171,22 +188,23 @@ public sealed class ItemInfo : IEquatable<ItemInfo>
 
         if (re.IsMatch(Name)) return true;
 
-        if (re.IsMatch(Description)) return true;
-
         if (re.IsMatch(LevelString)) return true;
         if (re.IsMatch(ItemLevelString)) return true;
 
+        if (ExternalCategoryManager.MatchesSearchTag(Item.ItemId, searchTerms)) return true;
+
+        if (re.IsMatch(Description)) return true;
+
         return false;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public bool IsRegexMatch(Regex re)
     {
         if (re.IsMatch(Name)) return true;
-        if (re.IsMatch(Description)) return true;
-
         if (re.IsMatch(LevelString)) return true;
         if (re.IsMatch(ItemLevelString)) return true;
-
+        if (re.IsMatch(Description)) return true;
         return false;
     }
 

AetherBags/Inventory/State/InventoryStateBase.cs

@@ -5,6 +5,7 @@ using AetherBags.Inventory.Categories;
 using AetherBags.Inventory.Context;
 using AetherBags.Inventory.Items;
 using AetherBags.Inventory.Scanning;
+using AetherBags.IPC.ExternalCategorySystem;
 using FFXIVClientStructs.FFXIV.Client.Game;
 
 namespace AetherBags.Inventory.State;
@@ -87,6 +88,24 @@ public abstract class InventoryStateBase
             );
         }
 
+        bool useUnified = config.General.UseUnifiedExternalCategories;
+
+        if (useUnified)
+        {
+            ExternalCategoryManager.BucketItems(ItemInfoByKey, BucketsByKey, ClaimedKeys);
+
+            if (allaganCategoriesEnabled && config.Categories.AllaganToolsFilterMode == PluginFilterMode.Highlight)
+                UpdateAllaganHighlight(HighlightState.SelectedAllaganToolsFilterKey);
+            else
+                HighlightState.ClearFilter(HighlightSource.AllaganTools);
+
+            if (bisCategoriesEnabled && config.Categories.BisBuddyMode == PluginFilterMode.Highlight)
+                UpdateBisBuddyHighlight(HighlightState.SelectedBisBuddyFilterKey);
+            else
+                HighlightState.ClearFilter(HighlightSource.BiSBuddy);
+        }
+        else
+        {
             if (allaganCategoriesEnabled)
             {
                 if (config.Categories.AllaganToolsFilterMode == PluginFilterMode.Categorize)
@@ -120,6 +139,7 @@ public abstract class InventoryStateBase
             {
                 HighlightState.ClearFilter(HighlightSource.BiSBuddy);
             }
+        }
 
         if (gameCategoriesEnabled)
         {
@@ -205,6 +225,9 @@ public abstract class InventoryStateBase
     public static IReadOnlyList<CurrencyInfo> GetCurrencyInfoList(uint[] currencyIds)
         => CurrencyState.GetCurrencyInfoList(currencyIds);
 
+    public static IReadOnlyList<CurrencyInfo> GetCurrencyInfoList(List<uint> currencyIds)
+        => CurrencyState.GetCurrencyInfoList(currencyIds);
+
     public static void InvalidateCurrencyCaches()
         => CurrencyState.InvalidateCaches();
 

AetherBags/Monitoring/InventoryMonitor.cs

@@ -40,6 +40,7 @@ public class InventoryMonitor : IDisposable
 
         Services.AddonLifecycle.RegisterListener(AddonEvent.PreFinalize, saddle, OnPreFinalize);
         Services.AddonLifecycle.RegisterListener(AddonEvent.PreFinalize, retainer, OnPreFinalize);
+        Services.AddonLifecycle.RegisterListener(AddonEvent.PreFinalize, bags, OnInventoryPreFinalize);
 
         // PreRefresh Handlers
         Services.AddonLifecycle.RegisterListener(AddonEvent.PreRefresh, bags, InventoryPreRefreshHandler);
@@ -65,6 +66,11 @@ public class InventoryMonitor : IDisposable
         OpenInventories(args.AddonName);
     }
 
+    private void OnInventoryPreFinalize(AddonEvent type, AddonArgs args)
+    {
+        System.AddonInventoryWindow.Close();
+    }
+
     private unsafe void OpenInventories(string name)
     {
         GeneralSettings config = System.Config.General;
@@ -168,22 +174,27 @@ public class InventoryMonitor : IDisposable
 
         if (atkValues.Length < 7) return;
 
-        AtkValue* value1 = (AtkValue*)atkValues[1].Address;
         AtkValue* value5 = (AtkValue*)atkValues[5].Address;
         AtkValue* value6 = (AtkValue*)atkValues[6].Address;
 
         if (value5->Type != ValueType.ManagedString || value6->Type != ValueType.ManagedString)
             return;
 
-        int openTitleId = value1->Int;
         ReadOnlySeString title = value5->String.AsReadOnlySeString();
         ReadOnlySeString upperTitle = value6->String.AsReadOnlySeString();
 
         System.AddonInventoryWindow.SetNotification(new InventoryNotificationInfo(title, upperTitle));
 
-        if (config.HideGameInventory) refreshArgs.AtkValueCount = 0;
+        if (config.HideGameInventory)
+        {
+            refreshArgs.AtkValueCount = 0;
+        }
+
         if (config.OpenWithGameInventory)
         {
+            AtkValue* value1 = (AtkValue*)atkValues[1].Address;
+            int openTitleId = value1->Int;
+
             if (openTitleId == 0)
             {
                 System.AddonInventoryWindow.Toggle();
@@ -234,6 +245,6 @@ public class InventoryMonitor : IDisposable
     public void Dispose()
     {
         Services.GameInventory.InventoryChangedRaw -= OnInventoryChangedRaw;
-        Services.AddonLifecycle.UnregisterListener(OnPostSetup, OnPreFinalize, OnInventoryUpdate, OnSaddleBagUpdate, OnRetainerInventoryUpdate);
+        Services.AddonLifecycle.UnregisterListener(OnPostSetup, OnPreFinalize, OnInventoryUpdate, OnSaddleBagUpdate, OnRetainerInventoryUpdate, OnInventoryPreFinalize, InventoryPreRefreshHandler);
     }
 }

AetherBags/Monitoring/LootedItemsTracker.cs

@@ -25,6 +25,7 @@ public sealed unsafe class LootedItemsTracker : IDisposable
     private bool _isEnabled;
     private long _batchStartTick;
     private bool _hasPendingRemoval;
+    private int _nextIndex;
 
     public event Action<IReadOnlyList<LootedItemInfo>>? OnLootedItemsChanged;
 
@@ -32,8 +33,6 @@ public sealed unsafe class LootedItemsTracker : IDisposable
 
     public bool HasPendingChanges => _pendingChanges.Count > 0 || _hasPendingRemoval;
 
-    private int GetNextIndex() => _lootedItems.Count > 0 ? _lootedItems.Max(x => x.Index) + 1 : 0;
-
     public void Enable()
     {
         if (_isEnabled) return;
@@ -43,6 +42,7 @@ public sealed unsafe class LootedItemsTracker : IDisposable
         _pendingChanges.Clear();
         _batchStartTick = 0;
         _hasPendingRemoval = false;
+        _nextIndex = 0;
         Services.GameInventory.InventoryChangedRaw += OnInventoryChangedRaw;
         Services.Framework.Update += OnFrameworkUpdate;
     }
@@ -58,12 +58,14 @@ public sealed unsafe class LootedItemsTracker : IDisposable
         _pendingChanges.Clear();
         _batchStartTick = 0;
         _hasPendingRemoval = false;
+        _nextIndex = 0;
     }
 
     public void Clear()
     {
         _lootedItems.Clear();
         _hasPendingRemoval = true;
+        _nextIndex = 0;
     }
 
     public void RemoveByIndex(int index)
@@ -100,9 +102,7 @@ public sealed unsafe class LootedItemsTracker : IDisposable
 
         foreach (var ((itemId, isHq), (item, delta)) in _pendingChanges)
         {
-            int existingIndex = _lootedItems.FindIndex(x =>
-                x.Item.ItemId == itemId &&
-                x.Item.Flags.HasFlag(InventoryItem.ItemFlags.HighQuality) == isHq);
+            int existingIndex = FindExistingItemIndex(itemId, isHq);
 
             if (existingIndex >= 0)
             {
@@ -116,13 +116,27 @@ public sealed unsafe class LootedItemsTracker : IDisposable
             }
             else if (delta > 0)
             {
-                _lootedItems.Add(new LootedItemInfo(GetNextIndex(), item, delta));
+                _lootedItems.Add(new LootedItemInfo(_nextIndex++, item, delta));
             }
         }
 
         _pendingChanges.Clear();
     }
 
+    private int FindExistingItemIndex(uint itemId, bool isHq)
+    {
+        for (int i = 0; i < _lootedItems.Count; i++)
+        {
+            var info = _lootedItems[i];
+            if (info.Item.ItemId == itemId &&
+                info.Item.Flags.HasFlag(InventoryItem.ItemFlags.HighQuality) == isHq)
+            {
+                return i;
+            }
+        }
+        return -1;
+    }
+
     private void OnInventoryChangedRaw(IReadOnlyCollection<InventoryEventArgs> events)
     {
         if (!_isEnabled || !Services.ClientState.IsLoggedIn) return;
@@ -156,7 +170,12 @@ public sealed unsafe class LootedItemsTracker : IDisposable
 
             if (_pendingChanges.TryGetValue(key, out var existing))
             {
-                _pendingChanges[key] = (existing.Item, existing.Quantity + changeAmount);
+                InventoryItem itemStruct = existing.Item;
+                if (changeAmount > 0 && itemStruct.ItemId == 0)
+                {
+                    itemStruct = *(InventoryItem*)eventData.Item.Address;
+                }
+                _pendingChanges[key] = (itemStruct, existing.Quantity + changeAmount);
             }
             else
             {

AetherBags/Nodes/Configuration/Category/CategoryGeneralConfigurationNode.cs

@@ -41,6 +41,7 @@ public sealed class CategoryGeneralConfigurationNode : TabbedVerticalListNode
             OnClick = isChecked =>
             {
                 config.CategoriesEnabled = isChecked;
+                System.IPC?.RefreshExternalSources();
                 RefreshInventory();
             }
         };
@@ -92,8 +93,9 @@ public sealed class CategoryGeneralConfigurationNode : TabbedVerticalListNode
             {
                 config.BisBuddyMode = selected;
                 if (selected == PluginFilterMode.Categorize)
-                    HighlightState.ClearFilter(HighlightSource.AllaganTools);
+                    HighlightState.ClearFilter(HighlightSource.BiSBuddy);
 
+                System.IPC?.RefreshExternalSources();
                 RefreshInventory();
             }
         };
@@ -110,6 +112,7 @@ public sealed class CategoryGeneralConfigurationNode : TabbedVerticalListNode
                 config.BisBuddyEnabled = isChecked;
                 if (bbModeDropdown != null) bbModeDropdown.IsEnabled = isChecked;
                 if (isChecked) System.IPC.BisBuddy?.RefreshItems();
+                System.IPC?.RefreshExternalSources();
                 RefreshInventory();
             }
         };
@@ -134,6 +137,7 @@ public sealed class CategoryGeneralConfigurationNode : TabbedVerticalListNode
                     HighlightState.ClearFilter(HighlightSource.AllaganTools);
                 }
 
+                System.IPC?.RefreshExternalSources();
                 RefreshInventory();
             }
         };
@@ -153,6 +157,7 @@ public sealed class CategoryGeneralConfigurationNode : TabbedVerticalListNode
                 config.AllaganToolsCategoriesEnabled = isChecked;
                 if (atModeDropdown != null) atModeDropdown.IsEnabled = isChecked;
                 if (isChecked) System.IPC?.AllaganTools?.RefreshFilters();
+                System.IPC?.RefreshExternalSources();
                 RefreshInventory();
             }
         };

AetherBags/Nodes/Configuration/Category/CategoryScrollingAreaNode.cs

@@ -14,6 +14,8 @@ public sealed class CategoryScrollingAreaNode : ScrollingListNode
 
         AddNode(new CategoryGeneralConfigurationNode());
 
+        AddNode(new ExperimentalConfigurationNode());
+
         var categoryConfigurationButtonNode = new TextButtonNode
         {
             Size = new Vector2(300, 28),

AetherBags/Nodes/Configuration/Category/ExperimentalConfigurationNode.cs

@@ -0,0 +1,50 @@
+using AetherBags.Configuration;
+using AetherBags.Inventory;
+using KamiToolKit.Nodes;
+
+namespace AetherBags.Nodes.Configuration.Category;
+
+internal class ExperimentalConfigurationNode : TabbedVerticalListNode
+{
+    public ExperimentalConfigurationNode()
+    {
+        GeneralSettings config = System.Config.General;
+
+        var titleNode = new CategoryTextNode
+        {
+            Height = 18,
+            String = "Experimental",
+        };
+        AddNode(titleNode);
+
+        AddTab(1);
+
+        var externalCategoryCheckbox = new CheckboxNode
+        {
+            Height = 18,
+            IsVisible = true,
+            String = "External Category Support",
+            IsChecked = config.UseUnifiedExternalCategories,
+            TextTooltip = "EXPERIMENTAL - Use at your own risk. This feature is not fully tested.\n\n" +
+                          "Enables enhanced integration with external plugins like " +
+                          "Allagan Tools and BisBuddy.\n\n" +
+                          "Features:\n" +
+                          "- Search by plugin tags (e.g. search 'bis' to find BiS items)\n" +
+                          "- Relationship highlighting: hover an item to see related items\n" +
+                          "  (same gear set, upgrades, crafting materials)\n" +
+                          "- Item badges showing plugin status icons\n" +
+                          "- Custom borders and visual effects (glow, pulse)\n" +
+                          "- Additional right-click menu options from plugins\n" +
+                          "- Extra tooltip information from plugins\n\n" +
+                          "When disabled, external plugins still provide categories and " +
+                          "basic highlighting, but without these enhanced features.",
+            OnClick = isChecked =>
+            {
+                config.UseUnifiedExternalCategories = isChecked;
+                System.IPC?.UpdateUnifiedCategorySupport(isChecked);
+                InventoryOrchestrator.RefreshAll(updateMaps: true);
+            }
+        };
+        AddNode(externalCategoryCheckbox);
+    }
+}

AetherBags/Nodes/Inventory/InventoryCategoryNode.cs

@@ -25,7 +25,8 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
     private readonly TextNode _categoryNameTextNode;
     private readonly HybridDirectionalFlexNode<DragDropNode> _itemGridNode;
 
-    private const float FallbackItemSize = 46;
+    private const float ExpectedItemWidth = 42;
+    private const float ExpectedItemHeight = 46;
     private const float HeaderHeight = 16;
     private const float MinWidth = 40;
 
@@ -41,12 +42,16 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
     private int _lastItemCount;
     private ulong _lastItemsHash;
     private int _lastItemsPerLine;
-    private float? _lastMaxWidth;
+    private bool _itemsNeedPopulation;
 
     public event Action<InventoryCategoryNode, bool>? HeaderHoverChanged;
+
+    public bool NeedsItemPopulation => _itemsNeedPopulation;
     public Action? OnRefreshRequested { get; set; }
     public Action? OnDragEnd { get; set; }
 
+    public SharedNodePool<InventoryDragDropNode>? SharedItemPool { get; set; }
+
     public InventoryCategoryNode()
     {
         _categoryNameTextNode = new TextNode
@@ -86,11 +91,10 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         set => SetCategoryData(value, _itemGridNode.ItemsPerLine);
     }
 
-    public void SetCategoryData(CategorizedInventory data, int itemsPerLine)
+    public void SetCategoryData(CategorizedInventory data, int itemsPerLine, bool deferItemCreation = false)
     {
         bool categoryChanged = data.Key != _lastCategoryKey;
         bool itemsPerLineChanged = itemsPerLine != _lastItemsPerLine;
-        bool maxWidthChanged = _maxWidth != _lastMaxWidth;
 
         ulong itemsHash = ComputeItemsHash(CollectionsMarshal.AsSpan(data.Items));
         bool itemsChanged = data.Items.Count != _lastItemCount || itemsHash != _lastItemsHash;
@@ -99,7 +103,6 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         _lastItemCount = data.Items.Count;
         _lastItemsHash = itemsHash;
         _lastItemsPerLine = itemsPerLine;
-        _lastMaxWidth = _maxWidth;
 
         _categorizedInventory = data;
 
@@ -112,24 +115,45 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         _categoryNameTextNode.TextTooltip = data.Category.Description;
 
         if (itemsChanged || categoryChanged)
+        {
+            _itemGridNode.ItemsPerLine = itemsPerLine;
+
+            if (deferItemCreation)
+            {
+                _itemsNeedPopulation = true;
+            }
+            else
             {
                 using (_itemGridNode.DeferRecalculateLayout())
                 {
-                _itemGridNode.ItemsPerLine = itemsPerLine;
                     UpdateItemGrid();
                 }
+                _itemsNeedPopulation = false;
+            }
         }
         else if (itemsPerLineChanged)
         {
             _itemGridNode.ItemsPerLine = itemsPerLine;
         }
 
-        if (categoryChanged || itemsChanged || itemsPerLineChanged || maxWidthChanged)
+        if (categoryChanged || itemsChanged || itemsPerLineChanged)
         {
             RecalculateSize();
         }
     }
 
+    public void PopulateItems()
+    {
+        if (!_itemsNeedPopulation)
+            return;
+
+        using (_itemGridNode.DeferRecalculateLayout())
+        {
+            UpdateItemGrid();
+        }
+        _itemsNeedPopulation = false;
+    }
+
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static ulong ComputeItemsHash(ReadOnlySpan<ItemInfo> items)
     {
@@ -164,7 +188,7 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         }
     }
 
-    public float? MaxWidth
+    public override float? MaxWidth
     {
         get => _maxWidth;
         set => _maxWidth = value;
@@ -234,12 +258,12 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         }
     }
 
-    public void RecalculateSize()
+    public override void RecalculateSize()
     {
         int itemCount = CategorizedInventory.Items.Count;
 
-        float cellW = _itemGridNode.Nodes.Count > 0 ? _itemGridNode.Nodes[0].Width : FallbackItemSize;
-        float cellH = _itemGridNode.Nodes.Count > 0 ? _itemGridNode.Nodes[0].Height : FallbackItemSize;
+        float cellW = ExpectedItemWidth;
+        float cellH = ExpectedItemHeight;
         float hPad = _itemGridNode.HorizontalPadding;
         float vPad = _itemGridNode.VerticalPadding;
 
@@ -298,31 +322,55 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
             getKeyFromData: item => item.Key,
             getKeyFromNode: node => node.ItemInfo?.Key ?? 0,
             updateNode: UpdateInventoryDragDropNode,
-            createNodeMethod: CreateInventoryDragDropNode);
+            createNodeMethod: CreateInventoryDragDropNode,
+            resetNodeForReuse: ResetDragDropNodeForReuse,
+            externalPool: SharedItemPool);
     }
 
     private void UpdateInventoryDragDropNode(InventoryDragDropNode node, ItemInfo data)
-    {
-        if (node.ItemInfo?.Key == data.Key)
     {
         node.ItemInfo = data;
-            node.Alpha = data.VisualAlpha;
-            node.AddColor = data.HighlightOverlayColor;
-            node.IsDraggable = !data.IsSlotBlocked;
-            return;
+        ApplyItemDataToNode(node, data);
     }
 
+    private static void ResetDragDropNodeForReuse(InventoryDragDropNode node)
+    {
+        node.ResetForReuse();
+    }
+
+    private unsafe InventoryDragDropNode CreateInventoryDragDropNode(ItemInfo data)
+    {
+        var node = new InventoryDragDropNode
+        {
+            Size = new Vector2(42, 46),
+            IsVisible = true,
+            AcceptedType = DragDropType.Item,
+            IsClickable = true,
+            OnDiscard = OnNodeDiscard,
+            OnEnd = _ => OnDragEnd?.Invoke(),
+            OnPayloadAccepted = OnNodePayloadAccepted,
+            OnRollOver = OnNodeRollOver,
+            OnRollOut = OnNodeRollOut,
+            ItemInfo = data
+        };
+
+        ApplyItemDataToNode(node, data);
+        return node;
+    }
+
+    private void ApplyItemDataToNode(InventoryDragDropNode node, ItemInfo data)
+    {
         InventoryItem item = data.Item;
         InventoryMappedLocation visualLocation = data.VisualLocation;
 
         var visualInvType = InventoryType.GetInventoryTypeFromContainerId(visualLocation.Container);
         int absoluteIndex = visualInvType.GetInventoryStartIndex + visualLocation.Slot;
 
-        node.ItemInfo = data;
         node.IconId = item.IconId;
         node.Alpha = data.VisualAlpha;
         node.AddColor = data.HighlightOverlayColor;
         node.IsDraggable = !data.IsSlotBlocked;
+        node.IconNode.IconExtras.AntsNode.IsVisible = data.IsRelationshipHighlighted;
         node.Payload = new DragDropPayload
         {
             Type = DragDropType.Item,
@@ -332,52 +380,31 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
         };
     }
 
-    private unsafe InventoryDragDropNode CreateInventoryDragDropNode(ItemInfo data)
+    private void OnNodeDiscard(DragDropNode n)
     {
-        InventoryItem item = data.Item;
-        InventoryMappedLocation visualLocation = data.VisualLocation;
+        if (n is not InventoryDragDropNode node) return;
+        OnDiscard(n, node.ItemInfo);
+    }
 
-        var visualInvType = InventoryType.GetInventoryTypeFromContainerId(visualLocation.Container);
-        int absoluteIndex = visualInvType.GetInventoryStartIndex + visualLocation.Slot;
+    private void OnNodePayloadAccepted(DragDropNode n, DragDropPayload acceptedPayload)
+    {
+        if (n is not InventoryDragDropNode node) return;
+        OnPayloadAccepted(n, acceptedPayload, node.ItemInfo);
+    }
 
-        DragDropPayload nodePayload = new DragDropPayload
-        {
-            // Int1 is always the container ID, for Item DragDrop Int2 is only used as a fallback
-            // ReferenceIndex is the absolute index that's actually used
-            Type = DragDropType.Item,
-            Int1 = visualLocation.Container,
-            Int2 = visualLocation.Slot,
-            ReferenceIndex = (short)absoluteIndex
-        };
-
-        return new InventoryDragDropNode
-        {
-            Size = new Vector2(42, 46),
-            Alpha = data.VisualAlpha,
-            AddColor = data.HighlightOverlayColor,
-            IsDraggable = !data.IsSlotBlocked,
-            IsVisible = true,
-            IconId = item.IconId,
-            AcceptedType = DragDropType.Item,
-            Payload = nodePayload,
-            IsClickable = true,
-            OnDiscard = node => OnDiscard(node, data),
-            OnEnd = _ => OnDragEnd?.Invoke(),
-            OnPayloadAccepted = (node, acceptedPayload) => OnPayloadAccepted(node, acceptedPayload, data),
-            OnRollOver = node =>
+    private unsafe void OnNodeRollOver(DragDropNode n)
     {
+        if (n is not InventoryDragDropNode node) return;
         BeginHeaderHover();
-                node.ShowInventoryItemTooltip(item.Container, item.Slot);
-            },
-            OnRollOut = node =>
+        var item = node.ItemInfo.Item;
+        n.ShowInventoryItemTooltip(item.Container, item.Slot);
+    }
+
+    private unsafe void OnNodeRollOut(DragDropNode n)
     {
         EndHeaderHover();
-
-                ushort addonId = RaptureAtkUnitManager.Instance()->GetAddonByNode(node)->Id;
+        ushort addonId = RaptureAtkUnitManager.Instance()->GetAddonByNode(n)->Id;
         AtkStage.Instance()->TooltipManager.HideTooltip(addonId);
-            },
-            ItemInfo = data
-        };
     }
 
     public void RefreshNodeVisuals()
@@ -392,6 +419,7 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
             float newAlpha = info.VisualAlpha;
             Vector3 newColor = info.HighlightOverlayColor;
             bool newDraggable = !info.IsSlotBlocked;
+            bool newAntsVisible = info.IsRelationshipHighlighted;
 
             if (!NearlyEqual(itemNode.Alpha, newAlpha))
                 itemNode.Alpha = newAlpha;
@@ -401,6 +429,9 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
 
             if (itemNode.IsDraggable != newDraggable)
                 itemNode.IsDraggable = newDraggable;
+
+            if (itemNode.IconNode.IconExtras.AntsNode.IsVisible != newAntsVisible)
+                itemNode.IconNode.IconExtras.AntsNode.IsVisible = newAntsVisible;
         }
     }
 
@@ -454,4 +485,30 @@ public class InventoryCategoryNode : InventoryCategoryNodeBase
             Services.Logger.Error(ex, "[OnPayload] Error handling payload acceptance");
         }
     }
+
+    public void ResetForReuse()
+    {
+        _lastCategoryKey = 0;
+        _lastItemCount = 0;
+        _lastItemsHash = 0;
+        _lastItemsPerLine = 0;
+        _itemsNeedPopulation = false;
+
+        _hoverRefs = 0;
+        _headerSuppressed = false;
+        _headerExpanded = false;
+        _fullHeaderText = string.Empty;
+
+        _fixedWidth = null;
+        _maxWidth = null;
+
+        _categoryNameTextNode.String = string.Empty;
+        _categoryNameTextNode.TextTooltip = string.Empty;
+        _categoryNameTextNode.IsVisible = true;
+
+        using (_itemGridNode.DeferRecalculateLayout())
+        {
+            _itemGridNode.Clear();
+        }
+    }
 }

AetherBags/Nodes/Inventory/InventoryCategoryNodeBase.cs

@@ -17,4 +17,8 @@ public abstract class InventoryCategoryNodeBase : SimpleComponentNode
     /// Whether this category should be pinned in the layout.
     /// </summary>
     public virtual bool IsPinnedInConfig => false;
+
+    public abstract float? MaxWidth { get; set; }
+
+    public abstract void RecalculateSize();
 }

AetherBags/Nodes/Inventory/InventoryDragDropNode.cs

@@ -1,17 +1,25 @@
 using System.Numerics;
+using AetherBags.Addons;
+using AetherBags.Inventory.Context;
 using AetherBags.Inventory.Items;
+using AetherBags.IPC.ExternalCategorySystem;
 using Dalamud.Game.ClientState.Keys;
 using FFXIVClientStructs.FFXIV.Client.Game;
 using FFXIVClientStructs.FFXIV.Client.UI.Agent;
 using FFXIVClientStructs.FFXIV.Component.GUI;
 using KamiToolKit.Classes;
 using KamiToolKit.Nodes;
+using KamiToolKit.Timelines;
 
 namespace AetherBags.Nodes.Inventory;
 
 public class InventoryDragDropNode : DragDropNode
 {
     private readonly TextNode _quantityTextNode;
+    private IconNode? _badgeNode;
+    private ImageNode? _borderNode;
+    private ItemDecoration? _currentDecoration;
+
     public unsafe InventoryDragDropNode()
     {
         _quantityTextNode = new TextNode {
@@ -26,6 +34,8 @@ public class InventoryDragDropNode : DragDropNode
         _quantityTextNode.AttachNode(this);
         CollisionNode.AddEvent(AtkEventType.MouseDown, OnItemMouseDown);
         CollisionNode.AddEvent(AtkEventType.MouseClick, OnItemClicked);
+        CollisionNode.AddEvent(AtkEventType.MouseOver, OnItemHover);
+        CollisionNode.AddEvent(AtkEventType.MouseOut, OnItemUnhover);
     }
 
     public required ItemInfo ItemInfo
@@ -35,9 +45,164 @@ public class InventoryDragDropNode : DragDropNode
         {
             field = value;
             _quantityTextNode.String = value.ItemCount.ToString();
+            ApplyDecoration(ExternalCategoryManager.GetDecoration(value.Item.ItemId));
         }
     }
 
+    public void ApplyDecoration(ItemDecoration? decoration)
+    {
+        if (_currentDecoration.Equals(decoration)) return;
+        _currentDecoration = decoration;
+
+        if (decoration == null)
+        {
+            ClearDecoration();
+            return;
+        }
+
+        if (decoration.Value.Badge.HasValue)
+        {
+            ApplyBadge(decoration.Value.Badge.Value);
+        }
+        else
+        {
+            ClearBadge();
+        }
+
+        if (decoration.Value.Border != BorderStyle.None)
+        {
+            ApplyBorder(decoration.Value.Border);
+        }
+        else
+        {
+            ClearBorder();
+        }
+    }
+
+    private void ApplyBadge(BadgeInfo badge)
+    {
+        if (_badgeNode == null)
+        {
+            _badgeNode = new IconNode
+            {
+                Size = new Vector2(16, 16),
+                NodeFlags = NodeFlags.Visible | NodeFlags.Enabled,
+            };
+            _badgeNode.AttachNode(this);
+        }
+
+        _badgeNode.IconId = badge.IconId;
+        _badgeNode.IsVisible = true;
+
+        if (badge.TintColor.HasValue)
+        {
+            _badgeNode.AddColor = new Vector3(badge.TintColor.Value.X, badge.TintColor.Value.Y, badge.TintColor.Value.Z);
+        }
+
+        _badgeNode.Position = badge.Position switch
+        {
+            BadgePosition.TopLeft => new Vector2(0, 0),
+            BadgePosition.TopRight => new Vector2(26, 0),
+            BadgePosition.BottomLeft => new Vector2(0, 30),
+            BadgePosition.BottomRight => new Vector2(26, 30),
+            _ => new Vector2(26, 0)
+        };
+    }
+
+    private void ClearBadge()
+    {
+        if (_badgeNode != null)
+        {
+            _badgeNode.IsVisible = false;
+        }
+    }
+
+    private BorderStyle _currentBorderStyle = BorderStyle.None;
+
+    private void ApplyBorder(BorderStyle style)
+    {
+        if (_borderNode == null)
+        {
+            _borderNode = new SimpleImageNode
+            {
+                Size = new Vector2(42, 46),
+                Position = new Vector2(0, 0),
+                NodeFlags = NodeFlags.Visible | NodeFlags.Enabled,
+                TexturePath = "ui/uld/IconA_Frame.tex",
+                TextureCoordinates = new Vector2(0, 0),
+                TextureSize = new Vector2(48, 48),
+            };
+            _borderNode.AttachNode(this);
+        }
+
+        _borderNode.IsVisible = true;
+
+        if (_currentBorderStyle != style)
+        {
+            _currentBorderStyle = style;
+            BuildBorderTimeline(style);
+        }
+
+        if (style == BorderStyle.Pulse)
+        {
+            _borderNode.Timeline?.PlayAnimation(1);
+        }
+        else if (style == BorderStyle.Glow)
+        {
+            _borderNode.Timeline?.PlayAnimation(1);
+        }
+    }
+
+    private void BuildBorderTimeline(BorderStyle style)
+    {
+        if (_borderNode == null) return;
+
+        switch (style)
+        {
+            case BorderStyle.Solid:
+                _borderNode.AddColor = new Vector3(1.0f, 1.0f, 1.0f);
+                break;
+
+            case BorderStyle.Glow:
+                _borderNode.AddTimeline(new TimelineBuilder()
+                    .BeginFrameSet(10, 50)
+                    .AddLabel(10, 1, AtkTimelineJumpBehavior.LoopForever, 10)
+                    .AddFrame(10, addColor: new Vector3(0.6f, 0.8f, 1.0f), alpha: 255)
+                    .AddFrame(30, addColor: new Vector3(0.9f, 1.0f, 1.2f), alpha: 255)
+                    .AddFrame(50, addColor: new Vector3(0.6f, 0.8f, 1.0f), alpha: 255)
+                    .EndFrameSet()
+                    .Build());
+                break;
+
+            case BorderStyle.Pulse:
+                _borderNode.AddTimeline(new TimelineBuilder()
+                    .BeginFrameSet(1, 40)
+                    .AddLabel(1, 1, AtkTimelineJumpBehavior.LoopForever, 1)
+                    .AddFrame(1, addColor: new Vector3(1.0f, 0.6f, 0.0f), alpha: 180)
+                    .AddFrame(20, addColor: new Vector3(1.2f, 0.9f, 0.3f), alpha: 255)
+                    .AddFrame(40, addColor: new Vector3(1.0f, 0.6f, 0.0f), alpha: 180)
+                    .EndFrameSet()
+                    .Build());
+                break;
+        }
+    }
+
+    private void ClearBorder()
+    {
+        if (_borderNode != null)
+        {
+            _borderNode.Timeline?.StopAnimation();
+            _borderNode.IsVisible = false;
+            _currentBorderStyle = BorderStyle.None;
+        }
+    }
+
+    private void ClearDecoration()
+    {
+        ClearBadge();
+        ClearBorder();
+    }
+
     private unsafe void OnItemMouseDown(AtkEventListener* thisPtr, AtkEventType eventType, int eventParam, AtkEvent* atkEvent, AtkEventData* atkEventData) {
         InventoryItem item = ItemInfo.Item;
         if (Services.KeyState[VirtualKey.SHIFT] && atkEventData->IsLeftClick && System.Config.General.LinkItemEnabled)
@@ -48,6 +213,11 @@ public class InventoryDragDropNode : DragDropNode
 
         if (!atkEventData->IsRightClick) return;
 
+        if (Services.KeyState[VirtualKey.CONTROL] && ItemContextMenuHandler.TryShowExternalMenu(ItemInfo))
+        {
+            return;
+        }
+
         AgentInventoryContext* context = AgentInventoryContext.Instance();
         context->OpenForItemSlot(item.Container, item.Slot, 0, context->AddonId);
     }
@@ -57,6 +227,56 @@ public class InventoryDragDropNode : DragDropNode
         if (Services.KeyState[VirtualKey.SHIFT] && System.Config.General.LinkItemEnabled) return;
         InventoryItem item = ItemInfo.Item;
         if (!atkEventData->IsLeftClick) return;
+
+        System.AetherBagsAPI?.API.RaiseItemClicked(item.ItemId);
         item.UseItem();
     }
+
+    private unsafe void OnItemHover(AtkEventListener* thisPtr, AtkEventType eventType, int eventParam, AtkEvent* atkEvent, AtkEventData* atkEventData)
+    {
+        uint itemId = ItemInfo.Item.ItemId;
+        System.AetherBagsAPI?.API.RaiseItemHovered(itemId);
+
+        if (System.Config.General.UseUnifiedExternalCategories)
+        {
+            var relatedItems = ExternalCategoryManager.GetRelatedItemIds(itemId, RelationshipType.SameSet);
+            if (relatedItems != null && relatedItems.Count > 0)
+            {
+                var relationships = ExternalCategoryManager.GetItemRelationships(itemId);
+                Vector3? highlightColor = null;
+                if (relationships != null)
+                {
+                    foreach (var rel in relationships)
+                    {
+                        if (rel.Type == RelationshipType.SameSet && rel.HighlightColor.HasValue)
+                        {
+                            highlightColor = rel.HighlightColor;
+                            break;
+                        }
+                    }
+                }
+                HighlightState.SetRelationshipHighlight(relatedItems, highlightColor);
+            }
+        }
+    }
+
+    private unsafe void OnItemUnhover(AtkEventListener* thisPtr, AtkEventType eventType, int eventParam, AtkEvent* atkEvent, AtkEventData* atkEventData)
+    {
+        System.AetherBagsAPI?.API.RaiseItemUnhovered(ItemInfo.Item.ItemId);
+
+        if (System.Config.General.UseUnifiedExternalCategories)
+        {
+            HighlightState.SetRelationshipHighlight(null, null);
+        }
+    }
+
+    public void ResetForReuse()
+    {
+        ClearDecoration();
+        _quantityTextNode.String = string.Empty;
+        Alpha = 1.0f;
+        AddColor = Vector3.Zero;
+        IsDraggable = true;
+        IconNode.IconExtras.AntsNode.IsVisible = false;
+    }
 }

AetherBags/Nodes/Inventory/InventoryFooterNode.cs

@@ -48,8 +48,7 @@ public sealed class InventoryFooterNode : SimpleComponentNode
 
         if (!config.Enabled) return;
 
-        //IReadOnlyList<CurrencyInfo> currencyInfoList = GetCurrencyInfoList([1, 28, 0xFFFF_FFFE, 0xFFFF_FFFD]);
-        IReadOnlyList<CurrencyInfo> currencyInfoList = GetCurrencyInfoList(config.DisplayedCurrencies.ToArray());
+        IReadOnlyList<CurrencyInfo> currencyInfoList = GetCurrencyInfoList(config.DisplayedCurrencies);
         _currencyListNode.SyncWithListDataByKey<CurrencyInfo, CurrencyNode, uint>(
             dataList: currencyInfoList,
             getKeyFromData: currencyInfo => currencyInfo.ItemId,

AetherBags/Nodes/Inventory/LootedItemDisplayNode.cs

@@ -18,6 +18,8 @@ public sealed unsafe class LootedItemDisplayNode : SimpleComponentNode
     private readonly TextNode _quantityTextNode;
 
     public Action<LootedItemDisplayNode>? OnDismiss { get; set; }
+    public Action<LootedItemDisplayNode>? OnRollOver { get; set; }
+    public Action<LootedItemDisplayNode>? OnRollOut { get; set; }
 
     public LootedItemDisplayNode()
     {
@@ -28,9 +30,13 @@ public sealed unsafe class LootedItemDisplayNode : SimpleComponentNode
             Position = new Vector2(0, 0),
             Size = new Vector2(42, 46),
         };
-        _iconNode.AddEvent(AtkEventType.MouseClick, OnMouseClick);
+        _iconNode.CollisionNode.NodeFlags = 0;
         _iconNode.AttachNode(this);
 
+        CollisionNode.AddEvent(AtkEventType.MouseClick, OnMouseClick);
+        CollisionNode.AddEvent(AtkEventType.MouseOver, OnMouseOver);
+        CollisionNode.AddEvent(AtkEventType.MouseOut, OnMouseOut);
+
         _quantityTextNode = new TextNode
         {
             Size = new Vector2(40.0f, 12.0f),
@@ -80,4 +86,21 @@ public sealed unsafe class LootedItemDisplayNode : SimpleComponentNode
         if (!atkEventData->IsLeftClick) return;
         OnDismiss?.Invoke(this);
     }
+
+    private void OnMouseOver(AtkEventListener* thisPtr, AtkEventType eventType, int eventParam, AtkEvent* atkEvent, AtkEventData* atkEventData)
+    {
+        OnRollOver?.Invoke(this);
+    }
+
+    private void OnMouseOut(AtkEventListener* thisPtr, AtkEventType eventType, int eventParam, AtkEvent* atkEvent, AtkEventData* atkEventData)
+    {
+        OnRollOut?.Invoke(this);
+    }
+
+    public void ResetForReuse()
+    {
+        LootedItem = null;
+        _iconNode.IsVisible = false;
+        _quantityTextNode.String = string.Empty;
+    }
 }

AetherBags/Nodes/Inventory/LootedItemsCategoryNode.cs

@@ -32,6 +32,8 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
     private int _lastItemCount;
     private long _lastItemsHash;
 
+    private float? _maxWidth;
+
     private int _hoverRefs;
     private bool _headerExpanded;
     private float _baseHeaderWidth = 96f;
@@ -54,6 +56,12 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
 
     public bool HasItems => _lootedItems.Count > 0;
 
+    public override float? MaxWidth
+    {
+        get => _maxWidth;
+        set => _maxWidth = value;
+    }
+
     public LootedItemsCategoryNode()
     {
         _headerTextNode = new TextNode
@@ -183,6 +191,8 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
             Vector2 drawSize = _headerTextNode.GetTextDrawSize();
             float expandedWidth = MathF.Max(_baseHeaderWidth, drawSize.X + 4f);
             _headerTextNode.Size = _headerTextNode.Size with { X = expandedWidth };
+
+            _clearButton.Position = new Vector2(expandedWidth + 4f, (HeaderHeight - ClearButtonSize) / 2);
         }
         else
         {
@@ -193,6 +203,9 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
 
             flags |= TextFlags.OverflowHidden | TextFlags.Ellipsis;
             _headerTextNode.TextFlags = flags;
+
+            float nodeWidth = Size.X;
+            _clearButton.Position = new Vector2(nodeWidth - ClearButtonSize, (HeaderHeight - ClearButtonSize) / 2);
         }
     }
 
@@ -203,7 +216,8 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
             getKeyFromData: item => item.Index,
             getKeyFromNode: node => node.LootedItem?.Index ?? -1,
             updateNode: UpdateLootedItemNode,
-            createNodeMethod: CreateLootedItemNode);
+            createNodeMethod: CreateLootedItemNode,
+            resetNodeForReuse: ResetLootedItemNodeForReuse);
     }
 
     private static void UpdateLootedItemNode(LootedItemDisplayNode node, LootedItemInfo data)
@@ -211,11 +225,18 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
         node.LootedItem = data;
     }
 
+    private static void ResetLootedItemNodeForReuse(LootedItemDisplayNode node)
+    {
+        node.ResetForReuse();
+    }
+
     private LootedItemDisplayNode CreateLootedItemNode(LootedItemInfo lootedItem)
     {
         return new LootedItemDisplayNode
         {
             OnDismiss = OnItemDismissed,
+            OnRollOver = _ => BeginHeaderHover(),
+            OnRollOut = _ => EndHeaderHover(),
             LootedItem = lootedItem,
         };
     }
@@ -227,13 +248,19 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
         OnDismissItem?.Invoke(index);
     }
 
-    private void RecalculateSize()
+    public override void RecalculateSize()
     {
         int itemCount = _lootedItems.Count;
 
+        const float cellW = 42f;
+        const float cellH = 46f;
+
+        float hPad = _itemGridNode.HorizontalPadding;
+        float vPad = _itemGridNode.VerticalPadding;
+
         if (itemCount == 0)
         {
-            float width = MinWidth;
+            float width = _maxWidth.HasValue ? Math.Min(MinWidth, _maxWidth.Value) : MinWidth;
             Size = new Vector2(width, HeaderHeight);
             _baseHeaderWidth = width - ClearButtonSize - 4;
             _headerTextNode.Size = new Vector2(_baseHeaderWidth, HeaderHeight);
@@ -246,20 +273,36 @@ public class LootedItemsCategoryNode : InventoryCategoryNodeBase
         }
 
         int itemsPerLine = Math.Max(1, _itemGridNode.ItemsPerLine);
+
+        float minUsableWidth = cellW;
+        if (_maxWidth.HasValue && _maxWidth.Value >= minUsableWidth)
+        {
+            int maxColumns = (int)MathF.Floor((_maxWidth.Value + hPad) / (cellW + hPad));
+            maxColumns = Math.Max(1, maxColumns);
+
+            float widthNeeded = maxColumns * cellW + (maxColumns - 1) * hPad;
+            if (widthNeeded > _maxWidth.Value && maxColumns > 1)
+                maxColumns--;
+
+            itemsPerLine = Math.Min(itemsPerLine, maxColumns);
+        }
+
         int rows = (itemCount + itemsPerLine - 1) / itemsPerLine;
         int actualColumns = Math.Min(itemCount, itemsPerLine);
 
-        const float cellW = 42f;
-        const float cellH = 46f;
-
-        float hPad = _itemGridNode.HorizontalPadding;
-        float vPad = _itemGridNode.VerticalPadding;
-
         float calculatedWidth = Math.Max(MinWidth, actualColumns * cellW + (actualColumns - 1) * hPad);
+
+        if (_maxWidth.HasValue && _maxWidth.Value >= minUsableWidth)
+            calculatedWidth = Math.Min(calculatedWidth, _maxWidth.Value);
+
         float gridHeight = rows * cellH + (rows - 1) * vPad;
         float totalHeight = HeaderHeight + gridHeight;
 
         Size = new Vector2(calculatedWidth, totalHeight);
+
+        if (_itemGridNode.ItemsPerLine != itemsPerLine)
+            _itemGridNode.ItemsPerLine = itemsPerLine;
+
         _baseHeaderWidth = calculatedWidth - ClearButtonSize - 4;
         _headerTextNode.Size = new Vector2(_baseHeaderWidth, HeaderHeight);
         _clearButton.Position = new Vector2(calculatedWidth - ClearButtonSize, (HeaderHeight - ClearButtonSize) / 2);

AetherBags/Nodes/Layout/DeferrableLayoutListNode.cs

@@ -15,20 +15,75 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
     private int _deferRecalcDepth;
     private bool _pendingRecalc;
 
-    /// <summary>
-    /// Hide and detach a node from the UI tree without disposing it.
-    /// Disposal happens later when KamiToolKit cleans up detached nodes.
-    /// </summary>
-    protected static void SafeDetachNode(NodeBase node)
+    private readonly Dictionary<Type, Stack<NodeBase>> _nodePoolByType = new();
+    private const int MaxPoolSizePerType = 64;
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private TU? TryRentFromPool<TU>(SharedNodePool<TU>? externalPool) where TU : NodeBase
+    {
+        if (externalPool != null)
+        {
+            return externalPool.TryRent();
+        }
+
+        if (_nodePoolByType.TryGetValue(typeof(TU), out var pool) && pool.Count > 0)
+        {
+            var node = (TU)pool.Pop();
+            node.IsVisible = true;
+            return node;
+        }
+        return null;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private bool TryReturnToPool<TU>(TU node, SharedNodePool<TU>? externalPool, Action<TU>? resetAction) where TU : NodeBase
+    {
+        if (externalPool != null)
+        {
+            resetAction?.Invoke(node);
+            return externalPool.TryReturn(node);
+        }
+
+        var type = typeof(TU);
+        if (!_nodePoolByType.TryGetValue(type, out var pool))
+        {
+            pool = new Stack<NodeBase>(16);
+            _nodePoolByType[type] = pool;
+        }
+
+        if (pool.Count >= MaxPoolSizePerType)
+            return false;
+
+        resetAction?.Invoke(node);
+        node.IsVisible = false;
+        node.DetachNode();
+        pool.Push(node);
+        return true;
+    }
+
+    private void DisposePool()
+    {
+        foreach (var pool in _nodePoolByType.Values)
+        {
+            while (pool.Count > 0)
+            {
+                var node = pool.Pop();
+                SafeDisposeNode(node);
+            }
+        }
+        _nodePoolByType.Clear();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected static void SafeDisposeNode(NodeBase node)
     {
         try
         {
-            node.IsVisible = false;
-            node.DetachNode();
+            node.Dispose();
         }
         catch (Exception ex)
         {
-            Services.Logger.Error(ex, $"[SafeDetachNode] Error detaching {node.GetType().Name}");
+            Services.Logger.Error(ex, $"[SafeDisposeNode] Error disposing {node.GetType().Name}");
         }
     }
 
@@ -137,7 +192,7 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
         if (!NodeList.Contains(node)) return;
 
         NodeList.Remove(node);
-        SafeDetachNode(node);
+        SafeDisposeNode(node);
 
         RecalculateLayout();
     }
@@ -161,13 +216,16 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
             {
                 var node = NodeList[i];
                 NodeList.RemoveAt(i);
-                SafeDetachNode(node);
+                SafeDisposeNode(node);
             }
         }
         finally
         {
             _suppressRecalculateLayout = false;
         }
+
+        DisposePool();
+
         RecalculateLayout();
     }
 
@@ -248,13 +306,14 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
         _dataKeysScratch = set;
     }
 
-
     public bool SyncWithListDataByKey<T, TU, TKey>(
         IReadOnlyList<T> dataList,
         Func<T, TKey> getKeyFromData,
         Func<TU, TKey> getKeyFromNode,
         Action<TU, T> updateNode,
         CreateNewNode<T, TU> createNodeMethod,
+        Action<TU>? resetNodeForReuse = null,
+        SharedNodePool<TU>? externalPool = null,
         IEqualityComparer<TKey>? keyComparer = null) where TU : NodeBase where TKey : notnull
     {
         keyComparer ??= EqualityComparer<TKey>.Default;
@@ -295,9 +354,13 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
             {
                 for (int i = 0; i < toRemove.Count; i++)
                 {
-                    var node = toRemove[i];
+                    var node = (TU)toRemove[i];
                     NodeList.Remove(node);
-                    SafeDetachNode(node);
+
+                    if (!TryReturnToPool(node, externalPool, resetNodeForReuse))
+                    {
+                        SafeDisposeNode(node);
+                    }
                 }
             }
             finally
@@ -345,9 +408,20 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
                 }
                 else
                 {
-                    var newNode = createNodeMethod(data);
-                    NodeList.Add(newNode);
+                    TU newNode;
+                    var pooledNode = TryRentFromPool(externalPool);
+                    if (pooledNode != null)
+                    {
+                        newNode = pooledNode;
                         newNode.AttachNode(this);
+                    }
+                    else
+                    {
+                        newNode = createNodeMethod(data);
+                        newNode.AttachNode(this);
+                    }
+
+                    NodeList.Add(newNode);
                     updateNode(newNode, data);
                     desired.Add(newNode);
                     structureChanged = true;
@@ -425,6 +499,15 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
         return structureChanged || orderChanged;
     }
 
+    public bool SyncWithListDataByKey<T, TU, TKey>(
+        IReadOnlyList<T> dataList,
+        Func<T, TKey> getKeyFromData,
+        Func<TU, TKey> getKeyFromNode,
+        Action<TU, T> updateNode,
+        CreateNewNode<T, TU> createNodeMethod,
+        IEqualityComparer<TKey>? keyComparer) where TU : NodeBase where TKey : notnull
+        => SyncWithListDataByKey(dataList, getKeyFromData, getKeyFromNode, updateNode, createNodeMethod, null, null, keyComparer);
+
     public bool SyncWithListData<T, TU>(
         IEnumerable<T> dataList,
         GetDataFromNode<T?, TU> getDataFromNode,
@@ -455,7 +538,7 @@ public abstract class DeferrableLayoutListNode : SimpleComponentNode
                 if (nodeData is null || !dataSet.Contains(nodeData))
                 {
                     NodeList.Remove(tu);
-                    SafeDetachNode(tu);
+                    SafeDisposeNode(tu);
                     anythingChanged = true;
                     continue;
                 }

AetherBags/Nodes/Layout/SharedNodePool.cs

@@ -0,0 +1,107 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using KamiToolKit;
+
+namespace AetherBags.Nodes.Layout;
+
+public sealed class SharedNodePool<T> where T : NodeBase
+{
+    private readonly Stack<T> _pool;
+    private readonly int _maxSize;
+    private readonly Func<T>? _factory;
+    private readonly Action<T>? _resetAction;
+
+    public SharedNodePool(int maxSize = 128, Func<T>? factory = null, Action<T>? resetAction = null)
+    {
+        _maxSize = maxSize;
+        _factory = factory;
+        _resetAction = resetAction;
+        _pool = new Stack<T>(Math.Min(maxSize, 64));
+    }
+
+    public int Count => _pool.Count;
+    public int MaxSize => _maxSize;
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public T? TryRent()
+    {
+        if (_pool.TryPop(out var node))
+        {
+            node.IsVisible = true;
+            return node;
+        }
+        return null;
+    }
+
+    public T RentOrCreate()
+    {
+        if (_pool.TryPop(out var node))
+        {
+            node.IsVisible = true;
+            return node;
+        }
+
+        if (_factory == null)
+            throw new InvalidOperationException("No factory provided and pool is empty");
+
+        return _factory();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool TryReturn(T node)
+    {
+        if (_pool.Count >= _maxSize)
+            return false;
+
+        _resetAction?.Invoke(node);
+        node.IsVisible = false;
+        node.DetachNode();
+        _pool.Push(node);
+        return true;
+    }
+
+    public void Return(T node)
+    {
+        if (!TryReturn(node))
+        {
+            try
+            {
+                node.Dispose();
+            }
+            catch (Exception ex)
+            {
+                Services.Logger.Error(ex, $"[SharedNodePool] Error disposing overflow node {typeof(T).Name}");
+            }
+        }
+    }
+
+    public void Clear()
+    {
+        while (_pool.TryPop(out var node))
+        {
+            try
+            {
+                node.Dispose();
+            }
+            catch (Exception ex)
+            {
+                Services.Logger.Error(ex, $"[SharedNodePool] Error disposing pooled node {typeof(T).Name}");
+            }
+        }
+    }
+
+    public void Prewarm(int count)
+    {
+        if (_factory == null)
+            return;
+
+        count = Math.Min(count, _maxSize - _pool.Count);
+        for (int i = 0; i < count; i++)
+        {
+            var node = _factory();
+            node.IsVisible = false;
+            _pool.Push(node);
+        }
+    }
+}

AetherBags/Nodes/Layout/VirtualizationState.cs

@@ -0,0 +1,146 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+
+namespace AetherBags.Nodes.Layout;
+
+public sealed class VirtualizationState
+{
+    private float _scrollPosition;
+    private float _viewportHeight;
+    private float _bufferSize = 100f;
+
+    private readonly List<VisibilityInfo> _itemVisibility = new(capacity: 64);
+
+    public float ScrollPosition
+    {
+        get => _scrollPosition;
+        set
+        {
+            if (MathF.Abs(_scrollPosition - value) < 0.5f) return;
+            _scrollPosition = value;
+            UpdateVisibility();
+        }
+    }
+
+    public float ViewportHeight
+    {
+        get => _viewportHeight;
+        set
+        {
+            if (MathF.Abs(_viewportHeight - value) < 0.5f) return;
+            _viewportHeight = value;
+            UpdateVisibility();
+        }
+    }
+
+    public float BufferSize
+    {
+        get => _bufferSize;
+        set => _bufferSize = value;
+    }
+
+    public event Action? OnVisibilityChanged;
+
+    public void SetItemLayout(int index, float y, float height)
+    {
+        while (_itemVisibility.Count <= index)
+        {
+            _itemVisibility.Add(new VisibilityInfo());
+        }
+
+        var info = _itemVisibility[index];
+        info.Y = y;
+        info.Height = height;
+        _itemVisibility[index] = info;
+    }
+
+    public void ClearLayout()
+    {
+        _itemVisibility.Clear();
+    }
+
+    public void SetItemCount(int count)
+    {
+        while (_itemVisibility.Count < count)
+        {
+            _itemVisibility.Add(new VisibilityInfo());
+        }
+        if (_itemVisibility.Count > count)
+        {
+            _itemVisibility.RemoveRange(count, _itemVisibility.Count - count);
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool IsVisible(int index)
+    {
+        if (index < 0 || index >= _itemVisibility.Count)
+            return false;
+
+        return _itemVisibility[index].IsVisible;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool IsInVisibleRange(float y, float height)
+    {
+        float visibleTop = _scrollPosition - _bufferSize;
+        float visibleBottom = _scrollPosition + _viewportHeight + _bufferSize;
+
+        float itemTop = y;
+        float itemBottom = y + height;
+
+        return itemBottom >= visibleTop && itemTop <= visibleBottom;
+    }
+
+    public void UpdateVisibility()
+    {
+        bool anyChanged = false;
+        float visibleTop = _scrollPosition - _bufferSize;
+        float visibleBottom = _scrollPosition + _viewportHeight + _bufferSize;
+
+        for (int i = 0; i < _itemVisibility.Count; i++)
+        {
+            var info = _itemVisibility[i];
+            float itemTop = info.Y;
+            float itemBottom = info.Y + info.Height;
+
+            bool wasVisible = info.IsVisible;
+            bool isVisible = itemBottom >= visibleTop && itemTop <= visibleBottom;
+
+            if (wasVisible != isVisible)
+            {
+                info.IsVisible = isVisible;
+                _itemVisibility[i] = info;
+                anyChanged = true;
+            }
+        }
+
+        if (anyChanged)
+        {
+            OnVisibilityChanged?.Invoke();
+        }
+    }
+
+    public void GetVisibleRange(out int firstVisible, out int lastVisible)
+    {
+        firstVisible = -1;
+        lastVisible = -1;
+
+        for (int i = 0; i < _itemVisibility.Count; i++)
+        {
+            if (_itemVisibility[i].IsVisible)
+            {
+                if (firstVisible < 0) firstVisible = i;
+                lastVisible = i;
+            }
+        }
+    }
+
+    private struct VisibilityInfo
+    {
+        public float Y;
+        public float Height;
+        public bool IsVisible;
+    }
+}

AetherBags/Nodes/Layout/WrappingGridNode.cs

@@ -36,6 +36,7 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
     private int _lastCompactLookahead;
 
     private int[] _orderScratch = Array.Empty<int>();
+    private bool _forceFullReflow;
 
     private T? _hoistedNode;
     private readonly HashSet<T> _pinned = new(ReferenceEqualityComparer<T>.Instance);
@@ -43,6 +44,7 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
     private readonly List<NodeBase> _layoutOrder = new(capacity: 256);
     private readonly List<NodeBase> _pinnedScratch = new(capacity: 64);
     private readonly List<NodeBase> _normalScratch = new(capacity: 256);
+    private readonly HashSet<T> _presentScratch = new(ReferenceEqualityComparer<T>.Instance);
 
     public WrappingGridNode()
     {
@@ -56,6 +58,11 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public bool TryGetRowIndex(NodeBase node, out int rowIndex) => _rowIndex.TryGetValue(node, out rowIndex);
 
+    public void InvalidateLayout()
+    {
+        _forceFullReflow = true;
+    }
+
     public void SetHoistedNode(T? node)
     {
         if (ReferenceEquals(_hoistedNode, node))
@@ -111,10 +118,14 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
             _rowIndex.Clear();
             _requiredHeight = 0f;
             _requiredHeightDirty = false;
+            _forceFullReflow = false;
             RememberLayoutParams();
             return;
         }
 
+        bool forceReflow = _forceFullReflow;
+        _forceFullReflow = false;
+
         bool hasSpecials = hoistedCount != 0 || pinnedCount != 0;
         bool compactEnabled = System.Config.General.CompactPackingEnabled;
 
@@ -128,7 +139,7 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
                 return;
             }
 
-            if (_rows.Count != 0 && LayoutParamsMatchLast() && NodeSetMatchesExistingLayout(layoutCount))
+            if (!forceReflow && _rows.Count != 0 && LayoutParamsMatchLast() && NodeSetMatchesExistingLayout(layoutCount))
             {
                 RepositionExistingRows();
                 _requiredHeightDirty = true;
@@ -142,7 +153,8 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
             return;
         }
 
-        if (_rows.Count != 0 &&
+        if (!forceReflow &&
+            _rows.Count != 0 &&
             NodeSetMatchesExistingLayout(layoutCount) &&
             TryUpdateLayoutWithoutReflowOrTailReflow(layoutCount, hoistedCount, pinnedCount))
         {
@@ -173,7 +185,8 @@ public sealed class WrappingGridNode<T> : DeferrableLayoutListNode where T : Nod
             return 0;
         }
 
-        var present = new HashSet<T>(ReferenceEqualityComparer<T>.Instance);
+        _presentScratch.Clear();
+        var present = _presentScratch;
 
         bool hoistedPresent = false;
         T? hoisted = _hoistedNode;

AetherBags/Plugin.cs

@@ -6,6 +6,7 @@ using AetherBags.Hooks;
 using AetherBags.Inventory;
 using AetherBags.Inventory.Context;
 using AetherBags.IPC;
+using AetherBags.IPC.AetherBagsAPI;
 using AetherBags.Monitoring;
 using Dalamud.Plugin;
 using KamiToolKit;
@@ -29,6 +30,8 @@ public class Plugin : IDalamudPlugin
         KamiToolKitLibrary.Initialize(pluginInterface);
 
         System.IPC = new IPCService();
+        System.IPC.UpdateUnifiedCategorySupport(System.Config.General.UseUnifiedExternalCategories);
+        ItemContextMenuHandler.Initialize();
         System.LootedItemsTracker = new LootedItemsTracker();
 
         System.AddonInventoryWindow = new AddonInventoryWindow
@@ -62,6 +65,8 @@ public class Plugin : IDalamudPlugin
         Services.PluginInterface.UiBuilder.OpenMainUi += System.AddonInventoryWindow.Toggle;
         Services.PluginInterface.UiBuilder.OpenConfigUi += System.AddonConfigurationWindow.Toggle;
 
+        System.AetherBagsAPI = new AetherBagsIPCProvider();
+
         _commandHandler = new CommandHandler();
 
         Services.ClientState.Login += OnLogin;
@@ -78,10 +83,12 @@ public class Plugin : IDalamudPlugin
     public void Dispose()
     {
         InventoryAddonContextMenu.Close();
+        ItemContextMenuHandler.Dispose();
         _inventoryHooks.Dispose();
         inventoryMonitor.Dispose();
 
         System.LootedItemsTracker.Dispose();
+        System.AetherBagsAPI?.Dispose();
         System.IPC.Dispose();
         HighlightState.ClearAll();
 
@@ -97,6 +104,7 @@ public class Plugin : IDalamudPlugin
     private void OnLogin()
     {
         System.Config = Util.LoadConfigOrDefault();
+        System.IPC.UpdateUnifiedCategorySupport(System.Config.General.UseUnifiedExternalCategories);
         System.LootedItemsTracker.Enable();
 
         System.AddonInventoryWindow.DebugOpen();

AetherBags/System.cs

@@ -2,6 +2,7 @@ using AetherBags.Addons;
 using AetherBags.Configuration;
 using AetherBags.Inventory;
 using AetherBags.IPC;
+using AetherBags.IPC.AetherBagsAPI;
 using AetherBags.Monitoring;
 
 namespace AetherBags;
@@ -13,6 +14,7 @@ public static class System
     public static AddonRetainerWindow AddonRetainerWindow { get; set; } = null!;
     public static AddonConfigurationWindow AddonConfigurationWindow { get; set; } = null!;
     public static IPCService IPC { get; set; } = null!;
+    public static AetherBagsIPCProvider? AetherBagsAPI { get; set; }
     public static SystemConfiguration Config { get; set; } = null!;
     public static LootedItemsTracker LootedItemsTracker { get; set; } = null!;
 }