{
  "schema": "body-rail-junction-validation-v1",
  "baseline_commit": "3275a9fc",
  "scope": "Reference body/rail boundary construction only. Factory body-panel roles and firsthand BMH rail/bulkhead joining photographs support integrated architecture, not these cutout dimensions. Floor, bulkhead and footwell passages are derived from the existing unmeasured stepped rail envelopes. No applicable1975 dimensioned body datum chart or owner hidden-junction survey is applied. All contours, stations, gauge, flange/lap/end closure and panel ownership remain estimates. Retained floor/rail/engine/suspension frames are not moved or calibrated. Resulting skin pieces remain fixed inspection references, not identified detachable repair panels. Zero source overlap does not establish actual alignment, fitted clearance, weld strength, sealing, support/jacking suitability, cutting/welding dimensions or a verified replacement/removal path.",
  "source_groups": {
    "cabin": 9,
    "footwell": 11
  },
  "valid_positive_step_solids": {
    "cabin-understructure-reference": 18,
    "front-footwell-reference": 25
  },
  "unchanged_mesh_payloads": {
    "cabin-understructure-reference": 7,
    "front-footwell-reference": 6
  },
  "body_skin_checks": {
    "cabin_left_floor_with_retained_seat_bores_reference": {
      "before_skin_rail_overlap_mm3": 2488.167066666601,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 32086.83302398929,
      "remaining_skin_solids": 1,
      "mesh_step_volume_relative_difference": 2.527078537539751e-07,
      "removed_material_only_within_reference_envelopes": true
    },
    "cabin_right_floor_with_retained_seat_bores_reference": {
      "before_skin_rail_overlap_mm3": 2488.1670666678615,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 32086.83302401043,
      "remaining_skin_solids": 1,
      "mesh_step_volume_relative_difference": 2.5270754511197424e-07,
      "removed_material_only_within_reference_envelopes": true
    },
    "front_left_footwell_front_and_top_comparison": {
      "before_skin_rail_overlap_mm3": 224.19309999998637,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 1411.2874999998396,
      "remaining_skin_solids": 1,
      "mesh_step_volume_relative_difference": 2.2908423538137157e-06,
      "removed_material_only_within_reference_envelopes": true
    },
    "front_right_footwell_front_and_top_comparison": {
      "before_skin_rail_overlap_mm3": 224.19309999998643,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 1411.2874999998396,
      "remaining_skin_solids": 3,
      "mesh_step_volume_relative_difference": 8.428924036518737e-08,
      "removed_material_only_within_reference_envelopes": true
    },
    "front_right_inner_toeboard_and_floor_return_reference": {
      "before_skin_rail_overlap_mm3": 706.978260547477,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 9662.351358857855,
      "remaining_skin_solids": 2,
      "mesh_step_volume_relative_difference": 0.0007613732002753615,
      "removed_material_only_within_reference_envelopes": true
    },
    "front_bulkhead_with_retained_apertures_and_footwell_mouths_reference": {
      "before_skin_rail_overlap_mm3": 706.4502000002551,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 6048.375,
      "remaining_skin_solids": 1,
      "mesh_step_volume_relative_difference": 2.8354886261183765e-06,
      "removed_material_only_within_reference_envelopes": true
    },
    "front_left_inner_toeboard_and_floor_return_reference": {
      "before_skin_rail_overlap_mm3": 706.9782605444536,
      "after_skin_rail_overlap_mm3": 0.0,
      "removed_skin_volume_mm3": 9662.351358881502,
      "remaining_skin_solids": 2,
      "mesh_step_volume_relative_difference": 0.0007674320442037086,
      "removed_material_only_within_reference_envelopes": true
    }
  },
  "shared_floor_bulkhead_toe_rail_material_witnesses": true,
  "eight_seat_bores_and_adjacent_material_retained": true,
  "rail_geometry_unchanged": true,
  "unchanged_surrounding_native_files": 10,
  "sha256": {
    "cabin-understructure-reference.json": "10d572b9df54d887d9b100bcd81b8534a1250901c703a484c3ecb08a9d4d3443",
    "cabin-understructure-reference.step": "46889b2cb6db7b58d9b7be28d37836f4b6ae4f828e7edaa1c1f389068d2aa049",
    "front-footwell-reference.json": "b7979dd3923a182e294184e60519594f1249cf0a0352a4746fccd6b6a4dc3e71",
    "front-footwell-reference.step": "8dc22ce429d94e40f16508c9f7b0f863eac45b9979294d736707b8cb0af0c943",
    "front-structure-reference.json": "83c9a8bc573e04e00e74b4a0707b7b7cdb5ab1c4fd3a44a5fdc378b65b7b747a",
    "front-structure-reference.step": "e721eb55fafbbf4ac4257e8e2946e41e5a2d4cc91b5b283d4d97d9dd371b710f"
  },
  "browser_validation": {
    "source_meshes": 20,
    "finite_vertices": 19008,
    "metric_placement_and_picking": true,
    "fixed_body_groups": true,
    "all_74_sources_ready": true,
    "normal_reload_without_hooks": true,
    "mobile_section_no_overflow": true,
    "page_errors": []
  }
}