Use a header to track seeded data. This has benefits client side in simplicity and allows us to track entities added during a test, as long as they include the play id header.

src/Core/Services/Implementations/PlayIdService.cs

@@ -1,4 +1,6 @@
-using Microsoft.Extensions.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 
 namespace Bit.Core.Services;
 
@@ -11,3 +13,38 @@ public class PlayIdService(IHostEnvironment hostEnvironment) : IPlayIdService
         return !string.IsNullOrEmpty(PlayId) && hostEnvironment.IsDevelopment();
     }
 }
+
+public class PlayIdSingletonService(IHttpContextAccessor httpContextAccessor, IHostEnvironment hostEnvironment) : IPlayIdService
+{
+    private PlayIdService Current
+    {
+        get
+        {
+            var httpContext = httpContextAccessor.HttpContext;
+            if (httpContext == null)
+            {
+                throw new InvalidOperationException("HttpContext is not available");
+            }
+            return httpContext.RequestServices.GetRequiredService<PlayIdService>();
+        }
+    }
+
+    public string? PlayId
+    {
+        get => Current.PlayId;
+        set => Current.PlayId = value;
+    }
+
+    public bool InPlay(out string playId)
+    {
+        if (hostEnvironment.IsDevelopment())
+        {
+            return Current.InPlay(out playId);
+        }
+        else
+        {
+            playId = string.Empty;
+            return false;
+        }
+    }
+}