{
  "schemaVersion": 1,
  "session": "2026-09-07 Harris Hill CCW",
  "annotationProvenance": "Source-only visual estimates by Codex before Vision run, 2026-09-14. Not independent human anatomical ground truth. Null torsoLength disables normalized accuracy claims.",
  "pairs": [
    {
      "id": "P01",
      "file": "Screenshot 2026-09-13 at 9.44.36\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 313,
            "height": 210
          },
          "crop": {
            "x": 106,
            "y": 57,
            "width": 124,
            "height": 91
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 150,
                "y": 86
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 134,
                "y": 100
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 327,
            "y": 3,
            "width": 315,
            "height": 210
          },
          "crop": {
            "x": 393,
            "y": 57,
            "width": 142,
            "height": 90
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 447,
                "y": 88
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 424,
                "y": 98
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    },
    {
      "id": "P02",
      "file": "Screenshot 2026-09-13 at 9.44.43\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 324,
            "y": 3,
            "width": 313,
            "height": 211
          },
          "crop": {
            "x": 389,
            "y": 13,
            "width": 179,
            "height": 165
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 539,
                "y": 67
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 537,
                "y": 95
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 310,
            "height": 211
          },
          "crop": {
            "x": 86,
            "y": 48,
            "width": 143,
            "height": 124
          },
          "annotations": [
            {
              "name": "right_shoulder",
              "point": {
                "x": 164,
                "y": 91
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "right_elbow",
              "point": {
                "x": 125,
                "y": 94
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    },
    {
      "id": "P03",
      "file": "Screenshot 2026-09-13 at 9.44.50\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 325,
            "y": 3,
            "width": 314,
            "height": 207
          },
          "crop": {
            "x": 418,
            "y": 50,
            "width": 116,
            "height": 111
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 489,
                "y": 92
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 508,
                "y": 110
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 311,
            "height": 207
          },
          "crop": {
            "x": 109,
            "y": 71,
            "width": 131,
            "height": 101
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 203,
                "y": 109
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 192,
                "y": 121
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    },
    {
      "id": "P04",
      "file": "Screenshot 2026-09-13 at 9.44.56\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 323,
            "y": 3,
            "width": 312,
            "height": 208
          },
          "crop": {
            "x": 429,
            "y": 64,
            "width": 98,
            "height": 104
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 500,
                "y": 97
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 517,
                "y": 113
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 309,
            "height": 208
          },
          "crop": {
            "x": 118,
            "y": 68,
            "width": 126,
            "height": 103
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 211,
                "y": 110
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 197,
                "y": 126
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    },
    {
      "id": "P05",
      "file": "Screenshot 2026-09-13 at 9.45.04\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 325,
            "y": 3,
            "width": 314,
            "height": 208
          },
          "crop": {
            "x": 435,
            "y": 65,
            "width": 100,
            "height": 105
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 501,
                "y": 100
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 518,
                "y": 115
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 311,
            "height": 208
          },
          "crop": {
            "x": 115,
            "y": 69,
            "width": 126,
            "height": 100
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 211,
                "y": 107
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 197,
                "y": 126
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    },
    {
      "id": "P06",
      "file": "Screenshot 2026-09-13 at 9.45.11\u202fPM.png",
      "riders": [
        {
          "role": "subject",
          "rider": "James",
          "panel": {
            "x": 324,
            "y": 3,
            "width": 312,
            "height": 206
          },
          "crop": {
            "x": 538,
            "y": 47,
            "width": 75,
            "height": 113
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 590,
                "y": 84
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 595,
                "y": 100
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        },
        {
          "role": "reference",
          "rider": "Damien",
          "panel": {
            "x": 4,
            "y": 3,
            "width": 310,
            "height": 206
          },
          "crop": {
            "x": 113,
            "y": 51,
            "width": 98,
            "height": 110
          },
          "annotations": [
            {
              "name": "left_shoulder",
              "point": {
                "x": 175,
                "y": 89
              },
              "uncertaintyPixels": 6
            },
            {
              "name": "left_elbow",
              "point": {
                "x": 181,
                "y": 109
              },
              "uncertaintyPixels": 6
            }
          ],
          "torsoLength": null,
          "annotationNote": "Provisional source-only garment landmarks by Codex, before detector inspection. Anatomical locations under gear and torso scale are unconfirmed; not eligibility for coaching."
        }
      ]
    }
  ]
}