diff --git a/HellionChat/Plugin.cs b/HellionChat/Plugin.cs
index 3d49324..717e3fc 100755
--- a/HellionChat/Plugin.cs
+++ b/HellionChat/Plugin.cs
@@ -113,6 +113,10 @@ public sealed class Plugin : IAsyncDalamudPlugin
     internal Ui.StatusBar StatusBar { get; private set; } = null!;
     internal Integrations.HonorificService HonorificService { get; private set; } = null!;
 
+    // Platform indirection over Dalamud.Utility.Util. Wired in Phase-1 ctor so
+    // any service allocated in LoadAsync can read Plugin.PlatformUtil.
+    internal static IPlatformUtil PlatformUtil { get; private set; } = null!;
+
     // Idempotency guard — Dalamud may fire DisposeAsync twice in a reload race.
     private int _disposeStarted;
 
@@ -154,6 +158,11 @@ public sealed class Plugin : IAsyncDalamudPlugin
 
         Config = Interface.GetPluginConfig() as Configuration ?? new Configuration();
 
+        // Wire platform indirection before LoadAsync allocates anything that
+        // needs Util.* — services then read Plugin.PlatformUtil instead of
+        // hitting the Dalamud static surface directly.
+        PlatformUtil = new DalamudPlatformUtil();
+
         // Schema gate: v1.4.x requires config v16. Users on older schemas
         // must install v1.4.2 first to run the migration chain.
         if (Config.Version < 16)
diff --git a/HellionChat/Util/DalamudPlatformUtil.cs b/HellionChat/Util/DalamudPlatformUtil.cs
new file mode 100644
index 0000000..fbed84b
--- /dev/null
+++ b/HellionChat/Util/DalamudPlatformUtil.cs
@@ -0,0 +1,16 @@
+namespace HellionChat.Util;
+
+internal sealed class DalamudPlatformUtil : IPlatformUtil
+{
+    public DalamudPlatformUtil()
+    {
+        // Util.IsWine probes the host process and never changes for the
+        // lifetime of a plugin instance, so we cache it once at ctor.
+        // Mirrors LightlessSync/Services/DalamudUtilService:154.
+        IsWine = Dalamud.Utility.Util.IsWine();
+    }
+
+    public bool IsWine { get; }
+
+    public void OpenLink(string url) => Dalamud.Utility.Util.OpenLink(url);
+}
diff --git a/HellionChat/Util/IPlatformUtil.cs b/HellionChat/Util/IPlatformUtil.cs
new file mode 100644
index 0000000..6fadc03
--- /dev/null
+++ b/HellionChat/Util/IPlatformUtil.cs
@@ -0,0 +1,11 @@
+namespace HellionChat.Util;
+
+// Indirection over Dalamud.Utility.Util's static surface so services can be
+// constructed in an isolated xUnit AppDomain without loading Dalamud.dll.
+// Production wiring lives in DalamudPlatformUtil; tests substitute a fake.
+internal interface IPlatformUtil
+{
+    bool IsWine { get; }
+
+    void OpenLink(string url);
+}