diff --git a/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs b/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs
new file mode 100644
index 0000000..47ec22c
--- /dev/null
+++ b/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs
@@ -0,0 +1,162 @@
+using SVSim.BattleNode.Protocol;
+
+namespace SVSim.BattleNode.Lifecycle;
+
+/// <summary>
+/// v1 Path-A scripted opponent. Hand-rolled static frames good enough to land the client on
+/// the mulligan screen and let them play turn 1. Templates derived from
+/// data_dumps/captures/battle-traffic_tk2_regular.ndjson.
+/// </summary>
+public static class ScriptedLifecycle
+{
+    /// <summary>30 dummy cardIds — repeats of a stable neutral card.</summary>
+    public static readonly long DummyCardId = 100011010;
+
+    public const long FakeOpponentViewerId = 999_999_999L;
+
+    public static MsgEnvelope BuildMatched(long playerViewerId, long opponentViewerId, string battleId)
+    {
+        var body = new Dictionary<string, object?>
+        {
+            ["selfInfo"] = new Dictionary<string, object?>
+            {
+                ["country_code"] = "KOR",
+                ["userName"] = "Player",
+                ["sleeveId"] = "3000011",
+                ["emblemId"] = "701441011",
+                ["degreeId"] = "300003",
+                ["fieldId"] = 43,
+                ["isOfficial"] = 0,
+                ["oppoId"] = opponentViewerId,
+                ["seed"] = 17548138L,
+            },
+            ["oppoInfo"] = new Dictionary<string, object?>
+            {
+                ["country_code"] = "JPN",
+                ["userName"] = "Opponent",
+                ["sleeveId"] = "704141010",
+                ["emblemId"] = "400001100",
+                ["degreeId"] = "120027",
+                ["fieldId"] = 5,
+                ["isOfficial"] = 0,
+                ["oppoId"] = playerViewerId,
+                ["seed"] = 17548138L,
+                ["oppoDeckCount"] = 30,
+            },
+            ["selfDeck"] = BuildDummyDeck(),
+        };
+        return EnvelopeForPush(NetworkBattleUri.Matched, body, bid: battleId);
+    }
+
+    public static MsgEnvelope BuildBattleStart(long playerViewerId)
+    {
+        var body = new Dictionary<string, object?>
+        {
+            ["turnState"] = 0,             // player goes first
+            ["battleType"] = 11,           // TK2 NetworkBattleType
+            ["selfInfo"] = new Dictionary<string, object?>
+            {
+                ["rank"] = "10",
+                ["battlePoint"] = "6270",
+                ["classId"] = "1",
+                ["charaId"] = "1",
+                ["cardMasterName"] = "card_master_node_10015",
+            },
+            ["oppoInfo"] = new Dictionary<string, object?>
+            {
+                ["rank"] = "1",
+                ["isMasterRank"] = "0",
+                ["battlePoint"] = 0,
+                ["masterPoint"] = "0",
+                ["classId"] = "8",
+                ["charaId"] = "8",
+                ["cardMasterName"] = "card_master_node_10015",
+            },
+        };
+        return EnvelopeForPush(NetworkBattleUri.BattleStart, body);
+    }
+
+    public static MsgEnvelope BuildDeal()
+    {
+        var body = new Dictionary<string, object?>
+        {
+            ["self"] = new List<object?>
+            {
+                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
+                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
+                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
+            },
+            ["oppo"] = new List<object?>
+            {
+                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
+                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
+                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
+            },
+        };
+        return EnvelopeForPush(NetworkBattleUri.Deal, body);
+    }
+
+    public static MsgEnvelope BuildSwapResponse(IReadOnlyList<long> swapIndices)
+    {
+        // v1: ignore the player's chosen indices and echo the same hand back.
+        // (Acceptable because the client doesn't validate which idxs come back — it just renders them.)
+        _ = swapIndices;
+        var body = new Dictionary<string, object?>
+        {
+            ["self"] = new List<object?>
+            {
+                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
+                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
+                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
+            },
+        };
+        return EnvelopeForPush(NetworkBattleUri.Swap, body);
+    }
+
+    public static MsgEnvelope BuildReady()
+    {
+        var body = new Dictionary<string, object?>
+        {
+            ["self"] = new List<object?>
+            {
+                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
+                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
+                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
+            },
+            ["oppo"] = new List<object?>
+            {
+                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
+                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
+                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
+            },
+            ["idxChangeSeed"] = 771335280,
+            ["spin"] = 243,
+        };
+        return EnvelopeForPush(NetworkBattleUri.Ready, body);
+    }
+
+    private static List<object?> BuildDummyDeck()
+    {
+        var deck = new List<object?>(30);
+        for (var i = 1; i <= 30; i++)
+        {
+            deck.Add(new Dictionary<string, object?>
+            {
+                ["idx"] = i,
+                ["cardId"] = DummyCardId,
+            });
+        }
+        return deck;
+    }
+
+    private static MsgEnvelope EnvelopeForPush(NetworkBattleUri uri, Dictionary<string, object?> body, string? bid = null) =>
+        new(uri,
+            ViewerId: FakeOpponentViewerId,
+            Uuid: "node-stub",
+            Bid: bid,
+            Try: 0,
+            Cat: EmitCategory.Battle,
+            PubSeq: null,
+            PlaySeq: null,         // OutboundSequencer.AssignAndArchive stamps this
+            Body: body);
+}
diff --git a/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs b/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs
new file mode 100644
index 0000000..2387f30
--- /dev/null
+++ b/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs
@@ -0,0 +1,63 @@
+using NUnit.Framework;
+using SVSim.BattleNode.Lifecycle;
+using SVSim.BattleNode.Protocol;
+
+namespace SVSim.UnitTests.BattleNode.Lifecycle;
+
+[TestFixture]
+public class ScriptedLifecycleTests
+{
+    [Test]
+    public void BuildMatched_PutsOppoIdInSelfInfoEqualToTheRealOpponentVid()
+    {
+        var env = ScriptedLifecycle.BuildMatched(playerViewerId: 906243102, opponentViewerId: 847666884, battleId: "b");
+
+        Assert.That(env.Uri, Is.EqualTo(NetworkBattleUri.Matched));
+        var selfInfo = (Dictionary<string, object?>)env.Body["selfInfo"]!;
+        Assert.That(selfInfo["oppoId"], Is.EqualTo(847666884L));
+        var oppoInfo = (Dictionary<string, object?>)env.Body["oppoInfo"]!;
+        Assert.That(oppoInfo["oppoId"], Is.EqualTo(906243102L));
+    }
+
+    [Test]
+    public void BuildMatched_ContainsThirtyCardSelfDeck()
+    {
+        var env = ScriptedLifecycle.BuildMatched(1, 2, "b");
+        var deck = (List<object?>)env.Body["selfDeck"]!;
+        Assert.That(deck.Count, Is.EqualTo(30));
+    }
+
+    [Test]
+    public void BuildBattleStart_HasTurnStateZeroAndBattleTypeEleven()
+    {
+        var env = ScriptedLifecycle.BuildBattleStart(playerViewerId: 1);
+        Assert.That(env.Body["turnState"], Is.EqualTo(0));
+        Assert.That(env.Body["battleType"], Is.EqualTo(11));
+    }
+
+    [Test]
+    public void BuildDeal_HasThreeSelfAndThreeOppoEntries()
+    {
+        var env = ScriptedLifecycle.BuildDeal();
+        var self = (List<object?>)env.Body["self"]!;
+        var oppo = (List<object?>)env.Body["oppo"]!;
+        Assert.That(self.Count, Is.EqualTo(3));
+        Assert.That(oppo.Count, Is.EqualTo(3));
+    }
+
+    [Test]
+    public void BuildSwapResponse_EchoesSameHandIfNoSwap()
+    {
+        var env = ScriptedLifecycle.BuildSwapResponse(swapIndices: Array.Empty<long>());
+        var self = (List<object?>)env.Body["self"]!;
+        Assert.That(self.Count, Is.EqualTo(3));
+    }
+
+    [Test]
+    public void BuildReady_IncludesIdxChangeSeedAndSpin()
+    {
+        var env = ScriptedLifecycle.BuildReady();
+        Assert.That(env.Body.ContainsKey("idxChangeSeed"), Is.True);
+        Assert.That(env.Body.ContainsKey("spin"), Is.True);
+    }
+}