{
  "schema_version": "1.0",
  "coordinate_convention": {
    "image_xy": "pixels, +x right, +y down",
    "angles": "radians",
    "normalized_pelvis_velocity": "image fraction per second"
  },
  "joint_schema": "COCO-17",
  "contact_semantics": "image-derived pseudo-label; not force-plate ground truth",
  "full_body_valid_semantics": "false frames must not contribute to full-body imitation loss",
  "camera_crop_semantics": "foot observations may remain useful; hidden body landmarks are interpolated",
  "target_music_grid": {
    "song": "Candy",
    "artist": "Cameo",
    "bpm": 111.0,
    "audio_included": false,
    "note": "tempo grid only; copyrighted recording is not redistributed"
  }
}