{
  "baseline_commit": "d120056e",
  "source_groups": 12,
  "positive_valid_step_solids": 44,
  "held_mesh_records_and_native_volumes": [
    "underfloor_cross_car_main_pipe_reference",
    "underfloor_resonator_to_cross_box_pipe_reference",
    "underfloor_right_tail_pipe_reference",
    "underfloor_intermediate_clip_isolator_comparison",
    "underfloor_intermediate_paired_unloaded_insulating_washers_reference",
    "underfloor_left_rear_clip_isolator_comparison",
    "underfloor_left_rear_paired_unloaded_insulating_washers_reference",
    "underfloor_right_rear_clip_isolator_comparison",
    "underfloor_right_rear_paired_unloaded_insulating_washers_reference",
    "underfloor_body_support_brackets_reference"
  ],
  "checks": {
    "underfloor_longitudinal_resonator_shell_comparison": {
      "single_connected_hollow_shell": true,
      "outer_bounds_and_endpoint_stations_held": true,
      "both_ports_open": true,
      "center_empty": true,
      "shoulder_mid_shoulder_y_spans_mm": [
        64.43133353329829,
        111.76000020045898,
        64.43133353372566
      ]
    },
    "underfloor_transverse_silencer_shell_comparison": {
      "single_connected_hollow_shell": true,
      "outer_bounds_and_endpoint_stations_held": true,
      "both_ports_open": true,
      "center_empty": true,
      "shoulder_mid_shoulder_y_spans_mm": [
        59.49244464469665,
        127.00000020058891,
        59.49244464475126
      ]
    }
  },
  "interfaces_paths_mounts_and_hangers_held": true,
  "held_neighbor_sha256": {
    "front-exhaust-reference.json": "ad8a4d819b570bf6893ded595075eff8f6fa898e24b5c8ea54e62905ed18a5e1",
    "front-exhaust-reference.step": "ccfec902371ab7f725399bf1a1546b9b472458ff205113ba3cd7da9cda80596c",
    "fuel-tank-reference.json": "f0e0d8179f57b505a57e0c81282ab29205d091d118ad5a8e421f1147b9f84e7a",
    "fuel-tank-reference.step": "b62b593bced34619b0fc4c5259ff8450921acaf08d4fab41e4d0219811dd641d",
    "rear-axle-reference.json": "27c1c2b43d021f8a595a2f4a79ec938bb346580fe8591ef240e8cd27f42c728a",
    "rear-axle-reference.step": "b50bb0e40ebed8a6ec4cf05ccdfe63b2f32ab890dbaecb35de4d072dd678e857",
    "rear-frame-reference.json": "184f2b29e1b079b4a0d44356e2a509d72139614d4ea4cb6a7011364b2cf291c4",
    "rear-frame-reference.step": "f00c11f25018c40ed49b6e05f53cae95c3b7601fdc08e636309d7cb107eb1fd7",
    "boot-floor-reference.json": "ccc7e022c7e7012d5d9e16d7346cb08e0254be28abd0b84dfb89fb41a2de56d7",
    "boot-floor-reference.step": "b6479d49e8d6e75c7fd845e8bbb245f028532d3459eaf562b2047b5279de8340"
  },
  "sampled_source_neighbor_contacts_mm3": {},
  "limits": "Factory/reference chamber architecture,not owner-fitted silencer identity or measured underfloor route. Empty hollow shells have no baffles,perforated tubes,packing,catalyst substrate or verified gas/thermal/acoustic behavior. Shared OD/bore end stations explain continuity only;no fitted weld/slip joint,seal,clearance,loaded hanger,part interchange or verified removal path. Ordinary front downpipe remains an unselected branch;no catalyst is inferred absent or installed."
}