diff --git a/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs b/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs
index 395db5e..ccd84da 100644
--- a/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs
+++ b/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs
@@ -38,12 +38,17 @@ public static class ScriptedLifecycle
                 SelfDeck: BuildPlayerDeck(ctx.SelfDeckCardIds)),
             bid: battleId);
 
-    public static MsgEnvelope BuildBattleStart(long playerViewerId) =>
+    public static MsgEnvelope BuildBattleStart(MatchContext ctx, long playerViewerId) =>
         EnvelopeForPush(NetworkBattleUri.BattleStart,
             new BattleStartBody(
                 TurnState: 0,    // player goes first
-                BattleType: 11,  // TK2 NetworkBattleType
-                SelfInfo: ScriptedProfiles.PlayerBattleStartProfile,
+                BattleType: ctx.BattleType,
+                SelfInfo: new BattleStartSelfInfo(
+                    Rank: ScriptedProfiles.PlayerRank,
+                    BattlePoint: ScriptedProfiles.PlayerBattlePoint,
+                    ClassId: ctx.ClassId,
+                    CharaId: ctx.CharaId,
+                    CardMasterName: ctx.CardMasterName),
                 OppoInfo: ScriptedProfiles.OpponentBattleStartProfile));
 
     public static MsgEnvelope BuildDeal() =>
diff --git a/SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs b/SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs
index 8697eed..0958b85 100644
--- a/SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs
+++ b/SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs
@@ -27,13 +27,10 @@ internal static class ScriptedProfiles
         Seed: BattleSeed,
         OppoDeckCount: 30);
 
-    // From frame[5] (BattleStart).
-    public static readonly BattleStartSelfInfo PlayerBattleStartProfile = new(
-        Rank: "10",
-        BattlePoint: "6270",
-        ClassId: "1",
-        CharaId: "1",
-        CardMasterName: "card_master_node_10015");
+    // From frame[5] (BattleStart). Hardcoded; see spec §Deferred plumbing — sourcing these
+    // from real per-viewer state needs a TK2 rank/battle-point tracker.
+    public const string PlayerRank = "10";
+    public const string PlayerBattlePoint = "6270";
 
     public static readonly BattleStartOppoInfo OpponentBattleStartProfile = new(
         Rank: "1",
diff --git a/SVSim.BattleNode/Sessions/BattleSession.cs b/SVSim.BattleNode/Sessions/BattleSession.cs
index d22a622..d7012b9 100644
--- a/SVSim.BattleNode/Sessions/BattleSession.cs
+++ b/SVSim.BattleNode/Sessions/BattleSession.cs
@@ -239,7 +239,7 @@ public sealed class BattleSession
                 Phase = BattleSessionPhase.AwaitingLoaded;
                 break;
             case NetworkBattleUri.Loaded when Phase == BattleSessionPhase.AwaitingLoaded:
-                result.Add((ScriptedLifecycle.BuildBattleStart(ViewerId), NoStock: false));
+                result.Add((ScriptedLifecycle.BuildBattleStart(Context, ViewerId), NoStock: false));
                 result.Add((ScriptedLifecycle.BuildDeal(), NoStock: false));
                 Phase = BattleSessionPhase.AwaitingSwap;
                 break;
diff --git a/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs b/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs
index 11093fb..f78257a 100644
--- a/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs
+++ b/SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs
@@ -68,14 +68,33 @@ public class ScriptedLifecycleTests
     }
 
     [Test]
-    public void BuildBattleStart_HasTurnStateZeroAndBattleTypeEleven()
+    public void BuildBattleStart_HasTurnStateZero_AndUsesContextBattleType()
     {
-        var env = ScriptedLifecycle.BuildBattleStart(playerViewerId: 1);
+        var env = ScriptedLifecycle.BuildBattleStart(FixtureCtx(), playerViewerId: 1);
         var body = (BattleStartBody)env.Body;
         Assert.That(body.TurnState, Is.EqualTo(0));
         Assert.That(body.BattleType, Is.EqualTo(11));
     }
 
+    [Test]
+    public void BuildBattleStart_class_chara_cardMaster_battleType_flow_from_context()
+    {
+        var ctx = FixtureCtx() with
+        {
+            ClassId = "7", CharaId = "5000123",
+            CardMasterName = "card_master_test_v2",
+            BattleType = 42,
+        };
+
+        var env = ScriptedLifecycle.BuildBattleStart(ctx, playerViewerId: 1);
+        var body = (BattleStartBody)env.Body;
+
+        Assert.That(body.SelfInfo.ClassId, Is.EqualTo("7"));
+        Assert.That(body.SelfInfo.CharaId, Is.EqualTo("5000123"));
+        Assert.That(body.SelfInfo.CardMasterName, Is.EqualTo("card_master_test_v2"));
+        Assert.That(body.BattleType, Is.EqualTo(42));
+    }
+
     [Test]
     public void BuildDeal_HasThreeSelfAndThreeOppoEntries()
     {
diff --git a/SVSim.UnitTests/BattleNode/Lifecycle/TypedBodyWireShapeTests.cs b/SVSim.UnitTests/BattleNode/Lifecycle/TypedBodyWireShapeTests.cs
index 662552d..73ef459 100644
--- a/SVSim.UnitTests/BattleNode/Lifecycle/TypedBodyWireShapeTests.cs
+++ b/SVSim.UnitTests/BattleNode/Lifecycle/TypedBodyWireShapeTests.cs
@@ -85,7 +85,7 @@ public class TypedBodyWireShapeTests
     [Test]
     public void BuildBattleStart_SerializesAllWireKeysAndPreservesBattlePointAsymmetry()
     {
-        var env = ScriptedLifecycle.BuildBattleStart(playerViewerId: 906243102);
+        var env = ScriptedLifecycle.BuildBattleStart(FixtureCtx(), playerViewerId: 906243102);
 
         var json = MsgEnvelope.ToJson(env);
         var node = JsonNode.Parse(json)!.AsObject();