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+ "session_id": "20261016_032917_session64",
+ "primitive": "P31",
+ "batch": "20261016",
+ "participant": "xiaobo",
+ "participant_source": "manifest",
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+  "verdict": "READY_WITH_WARNINGS",
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+  "family": "locomotion_primitives",
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+   "median_frame": 8.29,
+   "p95_frame": 10.72
+  },
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+   "RElbowIn 30mm",
+   "RElbow 30mm",
+   "RForearm 20mm",
+   "LKneeIn 15mm",
+   "RKneeIn 13mm"
+  ],
+  "valid_fraction": 1.0,
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+   "stature_mm": 1700.1
+  },
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+   "markers_on_surface": 52,
+   "surface_rmse_mm_median": 12.19
+  },
+  "shape_source": "participant median",
+  "wrist_correction": {
+   "left": {
+    "status": "corrected",
+    "Q_deg": 166.13,
+    "Q_rotvec": [
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+     0.05147,
+     0.84737
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+    "in_out_sign": -1,
+    "wrist_bend_deg_median": 154.4,
+    "opposite_sign_bend_deg": 27.4,
+    "in_out_convention": "pinky side = HandIn (default IN_OUT_SIGN, no ACE output)",
+    "marker_frame_spread_deg": 1.26,
+    "hand_vs_marker_frame_deg": {
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+     "after": 1.26
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+    "markers_on_wrist": [
+     "LWristIn",
+     "LWristOut",
+     "LHandIn",
+     "LHandOut"
+    ],
+    "forearm_twist": {
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+     "wrist_twist_deg_after": {
+      "median": 0.39,
+      "iqr": [
+       -3.4,
+       4.4
+      ]
+     },
+     "wrist_total_deg_median_after": 28.1,
+     "markers_on_forearm": [
+      "LElbow",
+      "LElbowIn",
+      "LForearm"
+     ]
+    },
+    "frames_used": 1500
+   },
+   "right": {
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+    "Q_rotvec": [
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+     0.27593,
+     0.21599
+    ],
+    "in_out_sign": 1,
+    "wrist_bend_deg_median": 79.0,
+    "opposite_sign_bend_deg": 103.8,
+    "in_out_convention": "pinky side = HandOut (default IN_OUT_SIGN, no ACE output)",
+    "marker_frame_spread_deg": 5.51,
+    "hand_vs_marker_frame_deg": {
+     "before": 97.71,
+     "after": 5.51
+    },
+    "markers_on_wrist": [
+     "RWristIn",
+     "RWristOut",
+     "RHandIn",
+     "RHandOut"
+    ],
+    "forearm_twist": {
+     "twist_moved_deg": -78.27,
+     "wrist_twist_deg_after": {
+      "median": -0.0,
+      "iqr": [
+       -6.4,
+       17.5
+      ]
+     },
+     "wrist_total_deg_median_after": 22.0,
+     "markers_on_forearm": [
+      "RForearm"
+     ]
+    },
+    "frames_used": 1500
+   },
+   "generated_at_utc": "2026-10-23T02:13:46.047281+00:00",
+   "note": "constant wrist rotation (marker-fit gauge freedom) removed; marker predictions unchanged"
+  }
+ },
+ "release": {
+  "release_path": "actions/locomotion_primitives/P31/session_090",
+  "family": "locomotion_primitives",
+  "primitive": "P31",
+  "source_session": "20261016/P31/20261016_033155_session65"
+ }
+}

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