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          148.85851419984283
        ],
        "scale": 0.9449187425813316,
        "attitude_radians": 1.343954697311374,
        "observed_crop_weight": 0.9999999999999993,
        "lower_contour_extension_factor": 1.0656115150710437,
        "observed_lower_contour_target": 239.68749999999997
      },
      "sam_frame": 25,
      "filled_rig_iou": 0.6155943844056156
    },
    {
      "f": 48,
      "time": 2.0,
      "source_time": 4.3356690022999995,
      "source_frame_index": 130,
      "source_index_time": 4.337671004337671,
      "anchors": {
        "top": [
          111.60718767495757,
          63.46578139497757
        ],
        "cap": [
          189.64248280898752,
          131.51939522514277
        ],
        "center": [
          133.17048852211244,
          148.69148453129122
        ],
        "scale": 0.9405940198860686,
        "attitude_radians": 1.3454534551413602,
        "observed_crop_weight": 0.9999999999999993,
        "lower_contour_extension_factor": 1.0592880112552452,
        "observed_lower_contour_target": 238.5
      },
      "sam_frame": 25,
      "filled_rig_iou": 0.6206229641693811
    },
    {
      "f": 49,
      "time": 2.0416666666666665,
      "source_time": 4.3773356689666665,
      "source_frame_index": 131,
      "source_index_time": 4.371037704371038,
      "anchors": {
        "top": [
          109.77325910352897,
          63.83643776563393
        ],
        "cap": [
          186.8722447137494,
          131.75105545680302
        ],
        "center": [
          130.75025993992185,
          148.51245350104818
        ],
        "scale": 0.9333652363402043,
        "attitude_radians": 1.3504234521992935,
        "observed_crop_weight": 0.9999999999999993,
        "lower_contour_extension_factor": 1.066865984029892,
        "observed_lower_contour_target": 238.5
      },
      "sam_frame": 26,
      "filled_rig_iou": 0.5849430411094602
    },
    {
      "f": 50,
      "time": 2.0833333333333335,
      "source_time": 4.4190023356333334,
      "source_frame_index": 132,
      "source_index_time": 4.404404404404405,
      "anchors": {
        "top": [
          107.74516943809658,
          64.22525889560458
        ],
        "cap": [
          184.1748170287627,
          131.97666076869183
        ],
        "center": [
          128.33391323750456,
          148.46375490843377
        ],
        "scale": 0.9278270558416044,
        "attitude_radians": 1.3535561073400855,
        "observed_crop_weight": 0.9999999999999993,
        "lower_contour_extension_factor": 1.0720487596236816,
        "observed_lower_contour_target": 238.5
      },
      "sam_frame": 26,
      "filled_rig_iou": 0.59593837535014
    },
    {
      "f": 51,
      "time": 2.125,
      "source_time": 4.4606690022999995,
      "source_frame_index": 134,
      "source_index_time": 4.471137804471138,
      "anchors": {
        "top": [
          105.41600277142994,
          64.642247312593
        ],
        "cap": [
          181.59029321923896,
          132.19287698490803
        ],
        "center": [
          125.92358599396664,
          148.61715704916207
        ],
        "scale": 0.9248813396882105,
        "attitude_radians": 1.3537441952858318,
        "observed_crop_weight": 0.9999999999999992,
        "lower_contour_extension_factor": 1.0733457692995056,
        "observed_lower_contour_target": 238.5
      },
      "sam_frame": 27,
      "filled_rig_iou": 0.5893888114672506
    },
    {
      "f": 52,
      "time": 2.1666666666666665,
      "source_time": 4.5023356689666665,
      "source_frame_index": 135,
      "source_index_time": 4.504504504504505,
      "anchors": {
        "top": [
          103.08683610476326,
          65.08951032843855
        ],
        "cap": [
          179.1877954353437,
          132.40909320112428
        ],
        "center": [
          123.65494112589741,
          148.86770709350606
        ],
        "scale": 0.9229910369982829,
        "attitude_radians": 1.3525216752701494,
        "observed_crop_weight": 0.999999999999999,
        "lower_contour_extension_factor": 1.0729315793728424,
        "observed_lower_contour_target": 238.5
      },
      "sam_frame": 27,
      "filled_rig_iou": 0.5894191491481519
    }
  ],
  "xsheet": [
    {
      "f": 0,
      "kind": "K",
      "note": "Steep entry attitude; preserve native lopsided rim."
    },
    {
      "f": 1,
      "kind": "B",
      "note": ""
    },
    {
      "f": 2,
      "kind": "B",
      "note": ""
    },
    {
      "f": 3,
      "kind": "B",
      "note": ""
    },
    {
      "f": 4,
      "kind": "B",
      "note": ""
    },
    {
      "f": 5,
      "kind": "K",
      "note": "Source-relative right/down drift."
    },
    {
      "f": 6,
      "kind": "B",
      "note": ""
    },
    {
      "f": 7,
      "kind": "B",
      "note": ""
    },
    {
      "f": 8,
      "kind": "B",
      "note": ""
    },
    {
      "f": 9,
      "kind": "B",
      "note": ""
    },
    {
      "f": 10,
      "kind": "K",
      "note": "Source-relative right/down drift."
    },
    {
      "f": 11,
      "kind": "B",
      "note": ""
    },
    {
      "f": 12,
      "kind": "B",
      "note": ""
    },
    {
      "f": 13,
      "kind": "B",
      "note": ""
    },
    {
      "f": 14,
      "kind": "B",
      "note": ""
    },
    {
      "f": 15,
      "kind": "B",
      "note": ""
    },
    {
      "f": 16,
      "kind": "B",
      "note": ""
    },
    {
      "f": 17,
      "kind": "B",
      "note": ""
    },
    {
      "f": 18,
      "kind": "B",
      "note": ""
    },
    {
      "f": 19,
      "kind": "B",
      "note": ""
    },
    {
      "f": 20,
      "kind": "K",
      "note": "Source-relative right/down drift."
    },
    {
      "f": 21,
      "kind": "B",
      "note": ""
    },
    {
      "f": 22,
      "kind": "B",
      "note": ""
    },
    {
      "f": 23,
      "kind": "B",
      "note": ""
    },
    {
      "f": 24,
      "kind": "B",
      "note": ""
    },
    {
      "f": 25,
      "kind": "B",
      "note": ""
    },
    {
      "f": 26,
      "kind": "B",
      "note": ""
    },
    {
      "f": 27,
      "kind": "B",
      "note": ""
    },
    {
      "f": 28,
      "kind": "B",
      "note": ""
    },
    {
      "f": 29,
      "kind": "B",
      "note": ""
    },
    {
      "f": 30,
      "kind": "K",
      "note": "Lower rim exits the camera crop."
    },
    {
      "f": 31,
      "kind": "B",
      "note": ""
    },
    {
      "f": 32,
      "kind": "B",
      "note": ""
    },
    {
      "f": 33,
      "kind": "B",
      "note": ""
    },
    {
      "f": 34,
      "kind": "B",
      "note": ""
    },
    {
      "f": 35,
      "kind": "B",
      "note": ""
    },
    {
      "f": 36,
      "kind": "B",
      "note": ""
    },
    {
      "f": 37,
      "kind": "B",
      "note": ""
    },
    {
      "f": 38,
      "kind": "B",
      "note": ""
    },
    {
      "f": 39,
      "kind": "B",
      "note": ""
    },
    {
      "f": 40,
      "kind": "K",
      "note": "Lower rim exits the camera crop."
    },
    {
      "f": 41,
      "kind": "B",
      "note": ""
    },
    {
      "f": 42,
      "kind": "B",
      "note": ""
    },
    {
      "f": 43,
      "kind": "B",
      "note": ""
    },
    {
      "f": 44,
      "kind": "B",
      "note": ""
    },
    {
      "f": 45,
      "kind": "B",
      "note": ""
    },
    {
      "f": 46,
      "kind": "B",
      "note": ""
    },
    {
      "f": 47,
      "kind": "B",
      "note": ""
    },
    {
      "f": 48,
      "kind": "K",
      "note": "Source-relative left/up return; retain lower crop."
    },
    {
      "f": 49,
      "kind": "B",
      "note": ""
    },
    {
      "f": 50,
      "kind": "B",
      "note": ""
    },
    {
      "f": 51,
      "kind": "B",
      "note": ""
    },
    {
      "f": 52,
      "kind": "K",
      "note": "Source-relative left/up return; retain lower crop."
    }
  ],
  "source_registration": {
    "method": "SAM top/cap landmarks per CI frame, five-sample quadratic smoothing, interpolated to24fps; native projection source-derived, no authored spin",
    "hidden_lower_contour": "unverified beyond viewport: lower native contour follows SAM crop in middle; final source-key observations restore rounded rim tip at238.5/240 image height despite mask-edge false positives; top/cap anchors remain fixed",
    "recorded_aspect": [
      416,
      240
    ],
    "output_aspect": [
      520,
      300
    ]
  },
  "planes": [
    {
      "id": "planet-clouds",
      "source": "drawn once by agent against NASA CGI source",
      "strokes": [
        [
          [
            0,
            38
          ],
          [
            25,
            27
          ],
          [
            54,
            35
          ],
          [
            69,
            24
          ],
          [
            96,
            37
          ]
        ],
        [
          [
            0,
            79
          ],
          [
            34,
            65
          ],
          [
            59,
            76
          ],
          [
            83,
            60
          ]
        ],
        [
          [
            0,
            149
          ],
          [
            32,
            133
          ],
          [
            55,
            148
          ],
          [
            86,
            136
          ]
        ],
        [
          [
            0,
            213
          ],
          [
            40,
            191
          ],
          [
            68,
            207
          ],
          [
            111,
            187
          ]
        ],
        [
          [
            232,
            33
          ],
          [
            266,
            45
          ],
          [
            298,
            35
          ],
          [
            339,
            49
          ],
          [
            376,
            30
          ],
          [
            416,
            45
          ]
        ],
        [
          [
            266,
            88
          ],
          [
            294,
            72
          ],
          [
            320,
            84
          ],
          [
            347,
            67
          ],
          [
            377,
            78
          ],
          [
            416,
            63
          ]
        ],
        [
          [
            264,
            163
          ],
          [
            289,
            143
          ],
          [
            323,
            155
          ],
          [
            359,
            135
          ],
          [
            394,
            149
          ],
          [
            416,
            141
          ]
        ],
        [
          [
            257,
            208
          ],
          [
            284,
            191
          ],
          [
            317,
            205
          ],
          [
            349,
            190
          ],
          [
            382,
            203
          ],
          [
            416,
            184
          ]
        ]
      ]
    },
    {
      "id": "rim",
      "source_strokes": [
        0
      ]
    },
    {
      "id": "dome",
      "source_strokes": [
        1
      ]
    },
    {
      "id": "specks",
      "source_strokes": [
        2,
        3,
        4,
        5
      ]
    }
  ],
  "camera": {
    "method": "held abstract cloud plate; background motion not measured",
    "parallax": "not inferred"
  },
  "mask_fit": {
    "method": "union of filled projected original rim/dome native polygons vs nearest 12fps source SAM mask; original ink specks excluded from silhouette; not model confidence",
    "mean": 0.6880779454053365,
    "minimum": 0.5770343231777864,
    "bar_mean": 0.65,
    "bar_minimum": 0.45,
    "frames": 53,
    "pass": true
  },
  "mask_provenance": {
    "branch": "wave2-track/flying-saucer",
    "commit": "4b1bb49126f9da6319349516b051a1da2e3b55b0",
    "model": "facebook/sam2.1-hiera-small",
    "detector": "IDEA-Research/grounding-dino-tiny",
    "track_sha256": "7b98a2dc09b3505003afb16dd27d96a567904e5d85cc2d44124f3f00abe663cf",
    "predicted_iou_is_not_measured_fit": true,
    "predicted_confidence": {
      "field": "SAM predicted IoU",
      "minimum": 0.965,
      "maximum": 0.981,
      "mean": 0.9749310344827589,
      "measured_against_ground_truth": false
    }
  },
  "assembly_summary": "The original six-stroke saucer follows a NASA CGI aeroshell\u2019s banked attitude, right/down drift, left/up return and lower-frame crop. No UFO footage or spinning flight is claimed.",
  "review_status": "drawing_identity_repair_pending",
  "review_note": "Third and final still review passes source framing/pose but rejects identity: original rim/body ink marks migrated onto the dome. Three critique rounds reached; this gap is retained. Actual normal-speed playback remains unrun.",
  "training_ran": false,
  "motion_approved": false,
  "train_eligible": false,
  "review_summary": {
    "rounds": 3,
    "source_framing_pose_bar_met": true,
    "original_doodle_identity_bar_met": false,
    "actual_normal_speed_playback_occurred": false,
    "remaining_gap": "Original-doodle identity: the rim/body ink marks have migrated onto the dome and changed their arrangement.",
    "stop_reason": "Three independent critique rounds reached; no fourth repair or approval claim."
  }
}