diff --git a/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistCoachDashboardWidget.cpp b/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistCoachDashboardWidget.cpp
index f96f00f..950bbef 100644
--- a/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistCoachDashboardWidget.cpp
+++ b/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistCoachDashboardWidget.cpp
@@ -959,6 +959,37 @@ namespace HyperTwistCoachDashboardWidgetInternal
 				);
 			}
 		}
+		const FHyperTwistTrainingTemplateLaunchSelectionScopedStats& PlainDecisionSplitGuardStats =
+			TemplateStats
+				->DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainStats;
+		const FHyperTwistTrainingTemplateLaunchSelectionScopedStats&
+			DecisionBiasSnapshotGuardStats =
+				TemplateStats
+					->DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardStats;
+		if (PlainDecisionSplitGuardStats.IsStructurallyValid()
+			|| DecisionBiasSnapshotGuardStats.IsStructurallyValid())
+		{
+			Fragment += FString::Printf(
+				TEXT(" | %s | %s"),
+				*BuildTemplateLaunchSelectionLaneAnalyticsSummary(
+					PlainDecisionSplitGuardStats,
+					TEXT("plain-decision-split-guard")),
+				*BuildTemplateLaunchSelectionLaneAnalyticsSummary(
+					DecisionBiasSnapshotGuardStats,
+					TEXT("decision-bias-snapshot-guard"))
+			);
+			if (PlainDecisionSplitGuardStats.GetOutcomeRunCount() > 0
+				&& DecisionBiasSnapshotGuardStats.GetOutcomeRunCount() > 0)
+			{
+				Fragment += FString::Printf(
+					TEXT(" | snapshot-guarded-minus-plain-decision-split delta success %+.2f | delta mistakes %+.2f"),
+					DecisionBiasSnapshotGuardStats.OverallSuccessRate
+						- PlainDecisionSplitGuardStats.OverallSuccessRate,
+					DecisionBiasSnapshotGuardStats.AverageMistakesPerOutcomeRun
+						- PlainDecisionSplitGuardStats.AverageMistakesPerOutcomeRun
+				);
+			}
+		}
 
 		return Fragment;
 	}
diff --git a/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingRepositoryLibrary.cpp b/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingRepositoryLibrary.cpp
index eeec8ee..482c8ca 100644
--- a/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingRepositoryLibrary.cpp
+++ b/UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingRepositoryLibrary.cpp
@@ -9174,6 +9174,10 @@ UHyperTwistTrainingRepositoryLibrary::ListTemplateLaunchScopedStatsForUser(
 			DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardNoDecisionBiasAccumulator;
 		FSelectionScopedAccumulator
 			DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardAccumulator;
+		FSelectionScopedAccumulator
+			DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainAccumulator;
+		FSelectionScopedAccumulator
+			DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardAccumulator;
 		FSelectionScopedAccumulator
 			DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotEarnedAccumulator;
 		FSelectionScopedAccumulator
@@ -9391,6 +9395,26 @@ UHyperTwistTrainingRepositoryLibrary::ListTemplateLaunchScopedStatsForUser(
 									.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardAccumulator,
 								Provenance.SelectionProvenance
 							);
+							if (Provenance.SelectionProvenance
+									.TemplateSignalSupportDecisionBiasSnapshotDecisionKind
+								==
+								EHyperTwistTrainingTemplateLaunchSelectionTemplateSignalSupportDecisionBiasSnapshotDecisionKind::
+									DecisionBiasSnapshotGuard)
+							{
+								AccumulateSelectionScopedStats(
+									Accumulator
+										.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardAccumulator,
+									Provenance.SelectionProvenance
+								);
+							}
+							else
+							{
+								AccumulateSelectionScopedStats(
+									Accumulator
+										.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainAccumulator,
+									Provenance.SelectionProvenance
+								);
+							}
 						}
 						else
 						{
@@ -9794,6 +9818,16 @@ UHyperTwistTrainingRepositoryLibrary::ListTemplateLaunchScopedStatsForUser(
 				Accumulator
 					.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardAccumulator
 					.Stats;
+		Accumulator.Stats
+			.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainStats =
+				Accumulator
+					.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainAccumulator
+					.Stats;
+		Accumulator.Stats
+			.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardStats =
+				Accumulator
+					.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardAccumulator
+					.Stats;
 		Accumulator.Stats
 			.DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotEarnedStats =
 				Accumulator
diff --git a/UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingTypes.h b/UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingTypes.h
index 03fdef3..1edb8c1 100644
--- a/UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingTypes.h
+++ b/UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingTypes.h
@@ -2391,6 +2391,14 @@ struct FHyperTwistTrainingTemplateLaunchScopedStats
 	FHyperTwistTrainingTemplateLaunchSelectionScopedStats
 		DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardStats;
 
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "HyperTwist")
+	FHyperTwistTrainingTemplateLaunchSelectionScopedStats
+		DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainStats;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "HyperTwist")
+	FHyperTwistTrainingTemplateLaunchSelectionScopedStats
+		DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardStats;
+
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "HyperTwist")
 	FHyperTwistTrainingTemplateLaunchSelectionScopedStats
 		DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotEarnedStats;
diff --git a/docs/arch/HYPERTWIST_PHASE4_TEMPLATE_SIGNAL_DECISION_BIAS_SNAPSHOT_GUARD_ANALYTICS_PACKET_2026-05-07.md b/docs/arch/HYPERTWIST_PHASE4_TEMPLATE_SIGNAL_DECISION_BIAS_SNAPSHOT_GUARD_ANALYTICS_PACKET_2026-05-07.md
new file mode 100644
index 0000000..f094fad
--- /dev/null
+++ b/docs/arch/HYPERTWIST_PHASE4_TEMPLATE_SIGNAL_DECISION_BIAS_SNAPSHOT_GUARD_ANALYTICS_PACKET_2026-05-07.md
@@ -0,0 +1,46 @@
+# HyperTwist Phase 4 template-signal decision-bias snapshot guard analytics packet
+
+## Purpose
+
+This packet aggregates the newly persisted historical decision-bias snapshot guard provenance back into repo-backed template analytics. The dashboard can now compare plain `DecisionSplitGuard` launches against the subset where earned-vs-non-earned decision-bias snapshot history became the final winner instead of treating every decision-split win as the same lane.
+
+## Scope
+
+- add repo-backed template-scoped stats buckets for `DecisionSplitGuard` launches with and without the persisted `DecisionBiasSnapshotGuard` marker
+- route stored `TemplateSignalSupportDecisionBiasSnapshotDecisionKind` through template launch scoped analytics derivation
+- extend the shared `template-signal decision` analytics fragment so live dashboard detail, template history, and recap expose the new nested decision-split split
+- report outcome deltas when both plain decision-split and history-reinforced decision-bias-snapshot-guard lanes have outcome history
+
+## What landed
+
+- `HyperTwistTrainingTypes.h`
+  - added `DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardPlainStats`
+  - added `DashboardAnalyticsTieBreakTemplateScopedSignalSupportBiasSnapshotGuardDecisionSplitGuardDecisionBiasSnapshotGuardStats`
+- `HyperTwistTrainingRepositoryLibrary.cpp`
+  - added matching scoped accumulators
+  - `DecisionSplitGuard` runs with stored `TemplateSignalSupportDecisionBiasSnapshotDecisionKind = DecisionBiasSnapshotGuard` now flow into the history-reinforced bucket
+  - `DecisionSplitGuard` runs without that retained marker, including older records, flow into the plain decision-split bucket
+- `HyperTwistCoachDashboardWidget.cpp`
+  - extended `BuildTemplateLaunchAnalyticsTieBreakTemplateSignalDecisionSplitFragment(...)`
+  - shared analytics detail now appends plain decision-split vs history-reinforced decision-bias-snapshot-guard lane summaries under the existing decision split
+  - nested split shows `snapshot-guarded-minus-plain-decision-split` success and mistake deltas when both lanes have outcome history
+
+## Product effect
+
+- operators can now see whether the historical decision-bias snapshot guard subset of `DecisionSplitGuard` launches is actually outperforming plain decision-split launches
+- template launch history and recap inherit the same nested split automatically because they already reuse the shared analytics detail formatter
+- older decision-split runs remain analyzable without migration because missing historical guard provenance is treated as plain decision-split history
+
+## Acceptance criteria
+
+- repo-backed template launch scoped stats retain separate `DecisionSplitGuard` buckets for plain wins and `DecisionBiasSnapshotGuard`-reinforced wins
+- shared dashboard analytics detail renders the nested decision-split split anywhere template launch analytics are shown
+- nested historical-guard deltas appear only when both decision-split lanes have outcome history
+- older `DecisionSplitGuard` runs without retained historical-guard provenance continue to participate in analytics through the plain decision-split bucket
+
+## Validation checklist
+
+1. full `Development Editor|Win64` build succeeds
+2. confirm scoped analytics route stored `TemplateSignalSupportDecisionBiasSnapshotDecisionKind = DecisionBiasSnapshotGuard` into the reinforced bucket
+3. confirm shared analytics detail shows `plain-decision-split-guard ... | decision-bias-snapshot-guard ...`
+4. confirm older `DecisionSplitGuard` runs without retained historical-guard provenance still surface under `plain-decision-split-guard`