Release update 2026-11-05: 5760 sessions, instructions, annotations (part 216)

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+ "schema_version": 1,
+ "session": "EgoMotionActions/20261031/LM03/20261031_025828_session25",
+ "session_id": "20261031_025828_session25",
+ "primitive": "LM03",
+ "batch": "20261031",
+ "participant": "wangjingjing",
+ "participant_source": "manifest",
+ "device_ids": {
+  "main": "e3296774a321bb51",
+  "left": null,
+  "right": null
+ },
+ "generated_at_utc": "2026-11-03T05:50:48.026505+00:00",
+ "generated_by": "scripts/sync_dataset.py",
+ "time_base": {
+  "definition": "t = 0 at the first solved Body0 frame; seconds; each stream has its own t, nothing resampled",
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+  "mocap_rate_fix": null,
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+  "duration_s": 124.025,
+  "mocap_time": "frame_index / rate (Nokov Timestamp column is not a clock; kept as source_timestamp_ms)"
+ },
+ "alignment": {
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+  "model": "offset (median of windows)",
+  "mocap_rel_s": "rig_rel + offset_s + rate * rig_rel, rig_rel = device_time - reference_imu_first_sample",
+  "offset_s": -0.081908,
+  "rate": 0.0,
+  "global_lag_s": -0.08,
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+   "window_corr_median": 0.9959524879227659,
+   "drift_ppm": 8.704977566259059,
+   "drift_se_ppm": 4.974606365598698,
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+   "lag_scatter_ms": 0.4719325973419252,
+   "lag_range_ms": 2.036409750450996
+  }
+ },
+ "units": {
+  "mocap": "millimetres, Nokov world, Y-up (unchanged)",
+  "y_up_to_z_up": [
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+  "acc": "m/s^2 (8192 LSB/g)",
+  "gyro": "rad/s (65.536 LSB/dps)",
+  "mag": "raw counts, scale unconfirmed (data suggests 163.84 LSB/uT, see knowledge_base sanity doc)",
+  "quaternions": "xyzw, Nokov global"
+ },
+ "calibration": {
+  "device": "e3296774a321bb51",
+  "status": "ok",
+  "date": "2026-10-21"
+ },
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+ "flags": [],
+ "sanity": "no sanity report covers this session (run scripts/sanity_check.py)",
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+   "status": "video_solve",
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+   "gyro_deg": 2.351,
+   "video_solve": {
+    "status": "ok",
+    "reason": "",
+    "reprojection_px": 2.946,
+    "n_assoc": 579,
+    "gyro_deg": 2.351
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+  },
+  "file": "derived/rig_tracker_provider/rig_tracker.json",
+  "compose": "T_world_cam(t) = T_world_tracker0(t) @ T_tracker0_cam"
+ },
+ "canonical": {
+  "generated_at_utc": "2026-11-03T09:18:01.879583+00:00",
+  "generated_by": "scripts/canonicalise_dataset.py",
+  "frame": "Z-up, metres, levelled per Nokov capture block; z = 0 at the Nokov origin; x/y heading as Nokov (global, not per-take)",
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+  "block": "20261031-morning",
+  "block_assignment": "trc",
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+  "plane_status": "ok",
+  "floor": {
+   "sole_marker_p1_mm": 17.3,
+   "headtop_p95_mm": 1534.0
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+  "gravity_check": {
+   "static_samples": 2687,
+   "g_world_mean_m_s2": [
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+   "tilt_from_z_deg": 1.315,
+   "tilt_from_z_deg_before_levelling": 1.018,
+   "magnitude_m_s2": 9.7898
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+  "rig_tracker_definition": "e3296774a321bb51/20261031-morning/labels-235140/session-67d051530f241b09",
+  "rig_check": {
+   "status": "video_solve",
+   "dropped_marker": null,
+   "gyro_deg": 2.351
+  },
+  "camera_pose_source": "T_tracker0_imu0 @ inv(T_cam_imu)",
+  "files": [
+   "mocap_zup.npz",
+   "tracker0_zup.npz",
+   "rig_zup.npz",
+   "cameras_zup.npz"
+  ]
+ },
+ "smplx": {
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+  "generated_by": "scripts/fit_smplx_dataset.py",
+  "file": "smplx.npz",
+  "gender": "female",
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+  "betas_source": "participant median (derived/smplx/participants.json)",
+  "frame": "canonical (meta.canonical): Z-up metres; fitted in Nokov frame, global_orient/transl rotated, *_nokov kept",
+  "pelvis": "transl + rest_joints(betas)[0] (transl is NOT the pelvis)",
+  "hands": {
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+   "hand_pose": "flat (zeros, flat_hand_mean=True)",
+   "wrist_anchor": "T_world_wrist (F,2,4,4) canonical; hand-marker offsets in wrist frame below",
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+   "p95_frame": 12.63
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+   "LThigh 16mm",
+   "STRN 15mm",
+   "WaistRBack 13mm"
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+   "note": "constant wrist rotation (marker-fit gauge freedom) removed; marker predictions unchanged"
+  }
+ },
+ "release": {
+  "release_path": "actions/locomanipulation/LM03/session_034",
+  "family": "locomanipulation",
+  "primitive": "LM03",
+  "source_session": "20261031/LM03/20261031_025828_session25"
+ },
+ "task": {
+  "primitive": "LM03",
+  "instruction": "Pick an object up off the floor, carry it across the room, and place it on the highest shelf you can comfortably reach. Keep going until the operator says stop; one object at a time, and do not rush between trips."
+ },
+ "objects": [
+  {
+   "name": "LittleBox1",
+   "object_type": "LittleBox",
+   "source": "mocap",
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