diff --git a/Aetheria.State.Daemon.Smoke/Program.cs b/Aetheria.State.Daemon.Smoke/Program.cs
index 94ef2664a..e1c8f298b 100644
--- a/Aetheria.State.Daemon.Smoke/Program.cs
+++ b/Aetheria.State.Daemon.Smoke/Program.cs
@@ -953,6 +953,8 @@ internal sealed class AetheriaDaemonYmirSmokeChecks
                 node.Kind is "feedback.event" or "shot.receipt"),
             "the static pilot surface must not retain mutable gameplay facts");
         var reactive = AetheriaRuntimeDaemonGameSurfaceBuilder.BuildReactiveGameplay(tick.Frame);
+        Require(reactive.Version == interruption.FrameId,
+            "reactive Eve surfaces and command receipts must share daemon frame-version semantics");
         Require(Flatten(reactive.Surface.Root).Any(node => node.Kind == "feedback.event" &&
                 node.Props["eventKind"] == "simulation.interrupted" &&
                 node.Props["reason"] == "entity.damaged" &&
diff --git a/Packages/org.gamecult.aetheria.state/Runtime/AetheriaRuntimeDaemonGameSurfaceBuilder.cs b/Packages/org.gamecult.aetheria.state/Runtime/AetheriaRuntimeDaemonGameSurfaceBuilder.cs
index e4d41fa4f..808104267 100644
--- a/Packages/org.gamecult.aetheria.state/Runtime/AetheriaRuntimeDaemonGameSurfaceBuilder.cs
+++ b/Packages/org.gamecult.aetheria.state/Runtime/AetheriaRuntimeDaemonGameSurfaceBuilder.cs
@@ -206,12 +206,11 @@ namespace GameCult.Aetheria.State.Verse
                 .Concat(receipts.Select(value => value.FrameId))
                 .DefaultIfEmpty(0)
                 .Max();
-            var version = checked(lastFrame * 100000L + events.Length * 100L + receipts.Length);
             return new AetheriaRuntimeSurfaceDocument(
                 AetheriaRuntimeProviderIdentity.ProviderId,
                 "game.daemon",
                 "Aetheria Pilot Reactive State",
-                version,
+                lastFrame,
                 frame.PublishedAtUtc,
                 new AetheriaRuntimeSurfaceTree(
                     "aetheria.daemon.game.reactive",