diff --git a/SVSim.UnitTests/BattleNode/Integration/CaptureConformanceTests.cs b/SVSim.UnitTests/BattleNode/Integration/CaptureConformanceTests.cs
index 92c3fe5..ad3d8c2 100644
--- a/SVSim.UnitTests/BattleNode/Integration/CaptureConformanceTests.cs
+++ b/SVSim.UnitTests/BattleNode/Integration/CaptureConformanceTests.cs
@@ -353,6 +353,48 @@ public class CaptureConformanceTests
         Assert.That(ourEntry.GetProperty("to").GetInt32(), Is.EqualTo(20));
     }
 
+    [Test]
+    public void RelayedUList_matches_prod_recv_uList_shape()
+    {
+        // Prod recv PlayActions uList entry (battle-traffic_tk2_regular.ndjson:75) — a deck-fetch the
+        // official node relayed to the opponent. We forward it verbatim; assert the always-present keys
+        // round-trip with matching value-kinds (capture ⊆ ours).
+        const string prodEntry = """
+        { "idxList": [16, 22], "from": 0, "to": 10, "isSelf": 1, "skill": "37|36|0" }
+        """;
+
+        var uListRaw = new List<object?>
+        {
+            new Dictionary<string, object?>
+            {
+                ["idxList"] = new List<object?> { 16L, 22L },
+                ["from"] = 0L, ["to"] = 10L, ["isSelf"] = 1L, ["skill"] = "37|36|0",
+            },
+        };
+        var relayed = SVSim.BattleNode.Sessions.Dispatch.KnownListBuilder.RelayUList(uListRaw);
+        Assert.That(relayed, Is.Not.Null);
+
+        var body = new SVSim.BattleNode.Protocol.Bodies.PlayActionsBroadcastBody(
+            PlayIdx: 37, Type: 30, KnownList: null, OppoTargetList: null, UList: relayed);
+        var env = new MsgEnvelope(NetworkBattleUri.PlayActions, ViewerId: 1, Uuid: "u", Bid: null, Try: 0,
+            Cat: EmitCategory.Battle, PubSeq: null, PlaySeq: null, Body: body);
+
+        using var ourDoc = JsonDocument.Parse(MsgEnvelope.ToJson(env));
+        var ourEntry = ourDoc.RootElement.GetProperty("uList")[0];
+        using var prodDoc = JsonDocument.Parse(prodEntry);
+
+        foreach (var key in new[] { "idxList", "from", "to", "isSelf", "skill" })
+        {
+            Assert.That(ourEntry.TryGetProperty(key, out var ours), Is.True, $"uList entry missing '{key}'");
+            var prodVal = prodDoc.RootElement.GetProperty(key);
+            Assert.That(ours.ValueKind, Is.EqualTo(prodVal.ValueKind), $"'{key}' type category mismatch");
+        }
+        Assert.That(ourEntry.GetProperty("idxList").GetArrayLength(), Is.EqualTo(2));
+        Assert.That(ourEntry.GetProperty("skill").GetString(), Is.EqualTo("37|36|0"));
+        // No cardId on a hidden fetch — confirm we didn't invent one.
+        Assert.That(ourEntry.TryGetProperty("cardId", out _), Is.False, "hidden fetch carries no cardId");
+    }
+
     [Test]
     public void MineCopyTokens_extracts_the_prod_capture_copy_op_shape()
     {