{
  "date": "2026-10-26",
  "baseline_commit": "af5df36e",
  "classification": "Research progress; no modeling or fitted-registration improvement claimed.",
  "geometry_applied": false,
  "captures": [
    {
      "original_basename": "IMG_6915.HEIC",
      "original_sha256": "589a46bb3eb517a64543c579dcfd98e66a21d31d07235428af107eb09bae9154",
      "original_dimensions_pixels": [
        4032,
        3024
      ],
      "original_orientation": "Rotate180",
      "focal_length_35mm_equivalent_mm": 24,
      "working_image": "/cars/assets/photos/img_6915.jpg",
      "working_sha256": "9cd017ff067fee28b27ceb0d722938cead8e85d421aa4a9a9a6b40ede4fc9939",
      "working_dimensions_pixels": [
        1400,
        1050
      ],
      "limits": "Original capture metadata is not a camera calibration. Equal aspect ratios do not prove unchanged crop; distortion, principal point and exact equivalent focal length remain uncertain."
    },
    {
      "original_basename": "IMG_6919.HEIC",
      "original_sha256": "a7d1bd9d85d9b63272b387bf21d80526dd21a1b44de3f93d9da0095c3be25f21",
      "original_dimensions_pixels": [
        4032,
        3024
      ],
      "original_orientation": "Rotate180",
      "focal_length_35mm_equivalent_mm": 24,
      "working_image": "/cars/assets/photos/img_6919.jpg",
      "working_sha256": "87cf6d7bb4cd850be8a60df0ab597fa7e8e72160a03ffb51b5590344501b005e",
      "working_dimensions_pixels": [
        1400,
        1050
      ],
      "limits": "Original capture metadata is not a camera calibration. Equal aspect ratios do not prove unchanged crop; distortion, principal point and exact equivalent focal length remain uncertain."
    }
  ],
  "conditional_camera_trials": [
    {
      "photo": "IMG_6915",
      "dark_aperture_regions": [
        {
          "centroid": [
            476.1839530332681,
            606.73385518591
          ],
          "bounds": [
            451,
            596,
            498,
            614
          ]
        },
        {
          "centroid": [
            686.423832923833,
            574.4275184275184
          ],
          "bounds": [
            660,
            564,
            712,
            584
          ]
        },
        {
          "centroid": [
            886.9500531349628,
            557.8703506907545
          ],
          "bounds": [
            860,
            546,
            918,
            570
          ]
        }
      ],
      "extraction": "Manual100x70px regions; grayscale<40, largest connected component. Centroids/bounds describe dark image regions, not physical hole axes; paint, shadows and cobwebs bias them.",
      "candidate_camera": {
        "photo": "6915",
        "focal_length_pixels": 970.7253433941509,
        "current_frame_basis": "Current unmeasured ellipse radii/spacing and sloping planar face; only two outboard holes fit camera.",
        "camera_position_body_mm": [
          174.02931763449192,
          -527.8543948664906,
          1410.9359688213647
        ],
        "world_to_camera_rotation": [
          [
            0.9779759716228145,
            0.11443105676827374,
            -0.17455237659598904
          ],
          [
            -0.12137987834242818,
            -0.36852797438172064,
            -0.9216583191355044
          ],
          [
            -0.16979376920838174,
            0.9225468363963979,
            -0.3465218760670223
          ]
        ],
        "world_to_camera_translation": [
          136.48867180243602,
          1126.9954199255772,
          1005.4396747823598
        ],
        "observed_centers": [
          [
            476.1839530332681,
            606.73385518591
          ],
          [
            686.423832923833,
            574.4275184275184
          ],
          [
            886.9500531349628,
            557.8703506907545
          ]
        ],
        "projected_centers": [
          [
            475.93194982418595,
            605.0372436290197
          ],
          [
            674.0467547732268,
            582.3764103755733
          ],
          [
            887.3480805826814,
            557.9785074619047
          ]
        ],
        "center_residuals_pixels": [
          [
            -0.25200320908214735,
            -1.696611556890275
          ],
          [
            -12.377078150606167,
            7.948891948054893
          ],
          [
            0.39802744771861853,
            0.10815677115010658
          ]
        ],
        "projected_current_parts": {
          "crank_pulley_center": [
            [
              711.4154054947454,
              668.9793167001785
            ]
          ],
          "sump_rear_floor": [
            [
              749.9423193768773,
              1028.2097106569367
            ]
          ],
          "sump_front_shallow_floor": [
            [
              720.9776906713455,
              807.4694164468856
            ]
          ]
        },
        "score": 22.430412802046572,
        "parameters": [
          1.9324908763363478,
          -0.004986411263971092,
          -0.24709966745014392,
          174.02931763449192,
          -769.1543948664906,
          339.57699446239025
        ]
      },
      "accepted_for_geometry": false,
      "middle_aperture_residual_norm_pixels": 14.709756855504597,
      "limits": "Only two outboard aperture regions fit this candidate. Aperture dimensions, spacing and sloping planar face come from estimated model geometry. The held-out middle region and pulley context do not establish a consistent fitted registration. Candidate pose/focal values must not be used as calibrated engine/body datums."
    },
    {
      "photo": "IMG_6919",
      "dark_aperture_regions": [
        {
          "centroid": [
            533.4707135250267,
            619.4621938232162
          ],
          "bounds": [
            507,
            606,
            559,
            631
          ]
        },
        {
          "centroid": [
            719.9795221843003,
            547.4047781569966
          ],
          "bounds": [
            688,
            532,
            752,
            564
          ]
        },
        {
          "centroid": [
            925.0945696342815,
            472.3494643516808
          ],
          "bounds": [
            883,
            450,
            966,
            496
          ]
        }
      ],
      "extraction": "Manual100x70px regions; grayscale<40, largest connected component. Centroids/bounds describe dark image regions, not physical hole axes; paint, shadows and cobwebs bias them.",
      "candidate_camera": {
        "photo": "6919",
        "focal_length_pixels": 970.7253433941509,
        "current_frame_basis": "Current unmeasured ellipse radii/spacing and sloping planar face; only two outboard holes fit camera.",
        "camera_position_body_mm": [
          447.71412962244375,
          240.3,
          1561.7267994864978
        ],
        "world_to_camera_rotation": [
          [
            0.695809278762661,
            -0.3529842889080794,
            -0.6255010306720864
          ],
          [
            -0.28571590510610656,
            -0.9350574677328635,
            0.2098426877601478
          ],
          [
            -0.6589505817261133,
            0.03270510389927096,
            -0.7514748878184513
          ]
        ],
        "world_to_camera_translation": [
          750.1602017071896,
          24.896408118776208,
          1460.7609211418999
        ],
        "observed_centers": [
          [
            533.4707135250267,
            619.4621938232162
          ],
          [
            719.9795221843003,
            547.4047781569966
          ],
          [
            925.0945696342815,
            472.3494643516808
          ]
        ],
        "projected_centers": [
          [
            533.6345116836435,
            620.4353308454979
          ],
          [
            692.4644264616006,
            560.2327995740469
          ],
          [
            923.3890430134053,
            472.70365578055527
          ]
        ],
        "center_residuals_pixels": [
          [
            0.163798158616828,
            0.9731370222816622
          ],
          [
            -27.515095722699698,
            12.828021417050309
          ],
          [
            -1.705526620876185,
            0.35419142887445787
          ]
        ],
        "projected_current_parts": {
          "crank_pulley_center": [
            [
              763.8125901357423,
              413.8546957199318
            ]
          ],
          "sump_rear_floor": [
            [
              992.9513847886226,
              515.1821607578831
            ]
          ],
          "sump_front_shallow_floor": [
            [
              868.0500652627593,
              488.90409354334344
            ]
          ]
        },
        "score": 34.10136079971233,
        "parameters": [
          2.980935892142872,
          -0.56290124963727,
          -1.1320169063569976,
          447.71412962244375,
          -1.0000000000000002,
          490.3678251275236
        ]
      },
      "accepted_for_geometry": false,
      "middle_aperture_residual_norm_pixels": 30.358501710486777,
      "limits": "Only two outboard aperture regions fit this candidate. Aperture dimensions, spacing and sloping planar face come from estimated model geometry. The held-out middle region and pulley context do not establish a consistent fitted registration. Candidate pose/focal values must not be used as calibrated engine/body datums."
    }
  ],
  "rejected_route_trial": {
    "committed": false,
    "estimated_coupling_rear_body_z_mm": 540,
    "estimated_crossing_body_z_mm": 450,
    "estimated_bend_radius_mm": 40,
    "finding": "The trial was constructible but its apparent frontward crossing was inferred from unregistered photo overlap. A pipe appearing across an image does not establish a cross-car direction or its longitudinal station. Neither catalyst state nor complete manifold-to-main-pipe route is visible. Constructibility is not evidence that the actual car uses this route.",
    "action": "Trial geometry, generated source assets, UI changes and comparison renders were withdrawn. Retained exhaust geometry remains an unverified configuration/reference estimate; keeping it is not fitted approval."
  },
  "measurement_record_reconciliation": {
    "checked": "Existing repository/Downloads export searches from earlier review, plus a read-only project-key/origin-filtered check of two accessible Chrome local-storage profiles in this pass.",
    "project_keys": [
      "midget-1500-cad-dimensions-v1",
      "midget1975-front-drive-photo-survey-v1",
      "midget-1500-cad-photo-estimates-v1"
    ],
    "result": "No project measurement records found in the inspected browser sources.",
    "limits": "Not proof that owner measurements were never made or supplied elsewhere. Other browsers, devices and notes are not exhaustively covered. Existing record location requested; no new capture requested."
  },
  "precise_gap": "A justified joint registration needs identifiable non-collinear frame/engine features or an accessible owner dimensional record. Two estimated outboard apertures and their unverified planar face cannot independently locate the engine, pan or crossing pipe.",
  "next_action": "Reconcile the existing measurement location if supplied; continue independent factory-supported assembly work. Do not repeat this two-aperture camera fit as a fitted survey or move assemblies merely to force photo overlap.",
  "verification": {
    "source_geometry_builders_and_viewer_code_match_baseline": true,
    "original_exhaust_route_restored_in_local_viewer": true,
    "all78_sources_ready": true,
    "no_ephemeral_browser_hooks": true,
    "mobile_review_and_evidence_link_checked": true
  }
}