diff --git a/ClumsyPilot/ParkrobTrajplanner/tarjplanner_movementtest/TrajectoryObservationStaticSnapshotBuilder.cs b/ClumsyPilot/ParkrobTrajplanner/tarjplanner_movementtest/TrajectoryObservationStaticSnapshotBuilder.cs
index fbac54b..d4435e7 100644
--- a/ClumsyPilot/ParkrobTrajplanner/tarjplanner_movementtest/TrajectoryObservationStaticSnapshotBuilder.cs
+++ b/ClumsyPilot/ParkrobTrajplanner/tarjplanner_movementtest/TrajectoryObservationStaticSnapshotBuilder.cs
@@ -56,6 +56,12 @@ public sealed class TrajectoryObservationStaticSnapshotBuilder
     private static IReadOnlyList<VisualizationMarker> CreateMarkers(TrajectoryObservationBootstrapResult bootstrap)
     {
         var markers = new List<VisualizationMarker>();
+        if (bootstrap.SmoothedPath.Path.Count > 0)
+        {
+            var start = bootstrap.SmoothedPath.Path[0];
+            markers.Add(new VisualizationMarker("smooth-start", "smooth-start",
+                "平滑路径起点", new VisualizationPoint(start.X, start.Y)));
+        }
         foreach (DirectionSegmentView segment in bootstrap.Segments)
         {
             if (segment.EndBoundary.BoundaryType == EmBoundaryType.GearSwitchApproach)
diff --git a/ClumsyPilot/tests/EMPlannerVerificationHost/TrajectoryObservationVisualizationChecks.cs b/ClumsyPilot/tests/EMPlannerVerificationHost/TrajectoryObservationVisualizationChecks.cs
index b167358..8d3be8f 100644
--- a/ClumsyPilot/tests/EMPlannerVerificationHost/TrajectoryObservationVisualizationChecks.cs
+++ b/ClumsyPilot/tests/EMPlannerVerificationHost/TrajectoryObservationVisualizationChecks.cs
@@ -82,6 +82,13 @@ internal static class TrajectoryObservationVisualizationChecks
         Verification.Equal(bootstrap.Segments.Count, snapshot.DirectionSegments.Count, "all direction segments exported");
         Verification.True(snapshot.StaticPolylines.Any(x => x.Id == "coarse-path"), "coarse path exported");
         Verification.True(snapshot.StaticPolylines.Any(x => x.Id == "local-g2-path"), "full Local G2 path exported");
+        VisualizationMarker smoothStart = snapshot.StaticMarkers.Single(x => x.Kind == "smooth-start");
+        Verification.Equal("平滑路径起点", smoothStart.LabelChinese,
+            "static snapshot labels the smoothed-path start");
+        Verification.NearlyEqual(bootstrap.SmoothedPath.Path[0].X, smoothStart.Position.X,
+            "smoothed-path start marker X matches the first smoothed point");
+        Verification.NearlyEqual(bootstrap.SmoothedPath.Path[0].Y, smoothStart.Position.Y,
+            "smoothed-path start marker Y matches the first smoothed point");
         byte[] occupancy = Convert.FromBase64String(snapshot.OccupancyGrid.OccupancyBitsBase64);
         Verification.Equal((bootstrap.Map.Rows * bootstrap.Map.Cols + 7) / 8, occupancy.Length,
             "occupancy bitset compact length");