← mecheval / run / a2-mounting-rail-01 / claude-mcp-claude-opus-4-7 / 20260611T174742Z-1b14

run 20260611T174742Z-1b14

a2-mounting-rail-01 · claude-mcp-claude-opus-4-7

Summary

statusfail
score0.83 (5/6)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-06-11T17:47:42.167Z
ended2026-06-11T17:51:29.331Z
tokens555,429 in · 4,916 out · 560,345 total
wallclock227.1s
tool calls34
task hashe375cec77275714a…
vcad hasha658e540bf0c0319…

Prompt

Make a long rectangular mounting rail 100mm long (X) × 20mm wide (Y) × 8mm thick (Z). Center it in X and Y, with the bottom face on the XY plane (z = 0 to z = 8). Drill three through-holes of diameter 6mm, axes parallel to Z, evenly spaced along the centerline (y = 0) at x = -40, x = 0, and x = 40. Output a single solid.

Checks

0
valid_solid
pass
params + details 
params: {
  "type": "valid_solid"
}

details: {
  "root_count": 10,
  "solids_produced": 10
}
1
bbox
pass
params + details 
params: {
  "type": "bbox",
  "min": [
    -50,
    -10,
    0
  ],
  "max": [
    50,
    10,
    8
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    50,
    10,
    8
  ],
  "actual_min": [
    -50,
    -10,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.1
}
2
mass_props
fail
volume off by 120.6%
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 15321.42,
  "tolerance_pct": 0.5
}

details: {
  "volume": {
    "actual_mm3": 33806.65180054394,
    "deviation_pct": 120.64959906160098,
    "pass": false,
    "spec_mm3": 15321.42,
    "tolerance_pct": 0.5
  }
}
3
hole_count
pass
params + details 
params: {
  "type": "hole_count",
  "diameter_mm": 6,
  "expected": 3,
  "diameter_tolerance_mm": 0.05
}

details: {
  "actual": 3,
  "diameter_mm": 6,
  "diameter_tolerance_mm": 0.05,
  "expected": 3,
  "found": [
    [
      -40,
      0,
      6
    ],
    [
      0,
      0,
      6
    ],
    [
      40,
      0,
      6
    ]
  ]
}
4
hole_positions
pass
params + details 
params: {
  "type": "hole_positions",
  "diameter_mm": 6,
  "positions": [
    [
      -40,
      0,
      0
    ],
    [
      0,
      0,
      0
    ],
    [
      40,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.15
}

details: {
  "diameter_mm": 6,
  "per_expected": [
    {
      "distance_mm": 0,
      "matched_hole": [
        -40,
        0
      ],
      "pass": true,
      "spec_xy": [
        -40,
        0
      ]
    },
    {
      "distance_mm": 0,
      "matched_hole": [
        0,
        0
      ],
      "pass": true,
      "spec_xy": [
        0,
        0
      ]
    },
    {
      "distance_mm": 0,
      "matched_hole": [
        40,
        0
      ],
      "pass": true,
      "spec_xy": [
        40,
        0
      ]
    }
  ],
  "tolerance_mm": 0.15,
  "unmatched_extras": []
}
5
step_roundtrip
pass
params + details 
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 0.5
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          50,
          10,
          8
        ],
        "original_min": [
          -50,
          -10,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          50,
          10,
          8
        ],
        "roundtripped_min": [
          -50,
          -10,
          0
        ],
        "tolerance_mm": 0.5114684741017769
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 16000,
        "pass": true,
        "roundtripped_mm3": 16000
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          3,
          3,
          8
        ],
        "original_min": [
          -3,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          8
        ],
        "roundtripped_min": [
          -3,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 1,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48152874411967655,
        "original_mm3": 225.83149526689886,
        "pass": true,
        "roundtripped_mm3": 224.74405170391347
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          -37,
          3,
          8
        ],
        "original_min": [
          -43,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          -37,
          3,
          8
        ],
        "roundtripped_min": [
          -43,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 2,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48154400202363506,
        "original_mm3": 225.83144140317745,
        "pass": true,
        "roundtripped_mm3": 224.74396364241693
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          3,
          3,
          8
        ],
        "original_min": [
          -3,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          8
        ],
        "roundtripped_min": [
          -3,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 3,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48152874411967655,
        "original_mm3": 225.83149526689886,
        "pass": true,
        "roundtripped_mm3": 224.74405170391347
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          3,
          3,
          8
        ],
        "original_min": [
          -3,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          8
        ],
        "roundtripped_min": [
          -3,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 4,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48152874411967655,
        "original_mm3": 225.83149526689886,
        "pass": true,
        "roundtripped_mm3": 224.74405170391347
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          3,
          3,
          8
        ],
        "original_min": [
          -3,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          8
        ],
        "roundtripped_min": [
          -3,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 5,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48152874411967655,
        "original_mm3": 225.83149526689886,
        "pass": true,
        "roundtripped_mm3": 224.74405170391347
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          43,
          3,
          8
        ],
        "original_min": [
          37,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          43,
          3,
          8
        ],
        "roundtripped_min": [
          37,
          -3,
          0
        ],
        "tolerance_mm": 0.05830951894845301
      },
      "index": 6,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48154400202363506,
        "original_mm3": 225.83144140317745,
        "pass": true,
        "roundtripped_mm3": 224.74396364241693
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          3,
          3,
          8
        ],
        "original_min": [
          -43,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          8
        ],
        "roundtripped_min": [
          -43,
          -3,
          0
        ],
        "tolerance_mm": 0.2353720459187964
      },
      "index": 7,
      "pass": true,
      "volume": {
        "deviation_pct": 0.4815363730709285,
        "original_mm3": 451.6629366700763,
        "pass": true,
        "roundtripped_mm3": 449.4880153463296
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          43,
          3,
          8
        ],
        "original_min": [
          -43,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          43,
          3,
          8
        ],
        "roundtripped_min": [
          -43,
          -3,
          0
        ],
        "tolerance_mm": 0.43289721643826723
      },
      "index": 8,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48153891605496185,
        "original_mm3": 677.4943780732538,
        "pass": true,
        "roundtripped_mm3": 674.2319789887465
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          50,
          10,
          8
        ],
        "original_min": [
          -50,
          -10,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          50,
          10,
          8
        ],
        "roundtripped_min": [
          -50,
          -10,
          0
        ],
        "tolerance_mm": 0.5114684741017769
      },
      "index": 9,
      "pass": true,
      "volume": {
        "deviation_pct": 0.01419436727060555,
        "original_mm3": 15322.505621926664,
        "pass": true,
        "roundtripped_mm3": 15324.6805546497
      }
    }
  ],
  "tolerance_pct": 0.5
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create_cad_loon
ok
13ms
args
{
  "source": "[difference\n  [translate 40 0 0 [cylinder 3 8]]\n  [difference\n    [translate 0 0 0 [cylinder 3 8]]\n    [difference\n      [translate -40 0 0 [cylinder 3 8]]\n      [translate -50 -10 0 [cube 100 20 8]]]]]"
}
2
create
err
8ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cube",
  "name": "Rail Block",
  "params": {
    "size_x": 100,
    "size_y": 20,
    "size_z": 8
  }
}
3
create
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cube",
  "name": "Rail Block",
  "params": {
    "size": [
      100,
      20,
      8
    ]
  }
}
4
read
ok
5ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "1"
}
5
delete
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "1"
}
6
create
ok
6ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cube",
  "name": "Rail Raw",
  "params": {
    "size": [
      100,
      20,
      8
    ]
  }
}
7
create
err
5ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "translate",
  "name": "Center Rail",
  "parent_part_id": "1",
  "params": {
    "offset": [
      -50,
      -10,
      0
    ],
    "input": 1
  }
}
8
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "translate",
  "name": "Center Rail",
  "parent_part_id": "1",
  "params": {
    "offset": [
      -50,
      -10,
      0
    ],
    "child": 1
  }
}
9
read
ok
3ms
args
{
  "document_id": "doc_1781200062342_1"
}
10
read
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "2"
}
11
delete
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "1"
}
12
read
ok
3ms
args
{
  "document_id": "doc_1781200062342_1"
}
13
read
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "2"
}
14
create
err
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cylinder",
  "name": "Hole1 Raw",
  "parent_part_id": "2",
  "params": {
    "radius": 3,
    "height": 8
  }
}
15
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cylinder",
  "name": "Hole1 Raw",
  "parent_part_id": "2",
  "params": {
    "radius": 3,
    "height": 8,
    "segments": 64
  }
}
16
read
ok
2ms
args
{
  "document_id": "doc_1781200062342_1"
}
17
read
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "3"
}
18
delete
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "3"
}
19
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cylinder",
  "name": "Hole Raw",
  "params": {
    "radius": 3,
    "height": 8,
    "segments": 64
  }
}
20
create
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "translate",
  "name": "Hole1 Place",
  "parent_part_id": "3",
  "params": {
    "offset": [
      -40,
      0,
      0
    ],
    "child": 3
  }
}
21
create
ok
2ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cylinder",
  "name": "Hole2 Raw",
  "params": {
    "radius": 3,
    "height": 8,
    "segments": 64
  }
}
22
create
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "translate",
  "name": "Hole2 Place",
  "parent_part_id": "5",
  "params": {
    "offset": [
      0,
      0,
      0
    ],
    "child": 5
  }
}
23
create
ok
1ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "cylinder",
  "name": "Hole3 Raw",
  "params": {
    "radius": 3,
    "height": 8,
    "segments": 64
  }
}
24
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "translate",
  "name": "Hole3 Place",
  "parent_part_id": "7",
  "params": {
    "offset": [
      40,
      0,
      0
    ],
    "child": 7
  }
}
25
read
ok
2ms
args
{
  "document_id": "doc_1781200062342_1"
}
26
create
err
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "union",
  "name": "Holes12",
  "params": {
    "children": [
      4,
      6
    ]
  }
}
27
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "union",
  "name": "Holes12",
  "params": {
    "left": 4,
    "right": 6
  }
}
28
read
ok
2ms
args
{
  "document_id": "doc_1781200062342_1",
  "part_id": "9"
}
29
read
ok
1ms
args
{
  "document_id": "doc_1781200062342_1"
}
30
create
ok
3ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "union",
  "name": "AllHoles",
  "params": {
    "left": 9,
    "right": 8
  }
}
31
create
ok
4ms
args
{
  "document_id": "doc_1781200062342_1",
  "type": "difference",
  "name": "Mounting Rail",
  "params": {
    "left": 2,
    "right": 10
  }
}
32
read
ok
3ms
args
{
  "document_id": "doc_1781200062342_1"
}
33
get_document
ok
2ms
args
{
  "document_id": "doc_1781200062342_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T174742Z-1b14.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Rail Raw",
      "op": {
        "type": "Cube",
        "size": {
          "x": 100,
          "y": 20,
          "z": 8
        }
      }
    },
    "2": {
      "id": 2,
      "name": "Center Rail",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": {
          "x": -50,
          "y": -10,
          "z": 0
        }
      }
    },
    "3": {
      "id": 3,
      "name": "Hole Raw",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 8,
        "segments": 64
      }
    },
    "4": {
      "id": 4,
      "name": "Hole1 Place",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {
          "x": -40,
          "y": 0,
          "z": 0
        }
      }
    },
    "5": {
      "id": 5,
      "name": "Hole2 Raw",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 8,
        "segments": 64
      }
    },
    "6": {
      "id": 6,
      "name": "Hole2 Place",
      "op": {
        "type": "Translate",
        "child": 5,
        "offset": {
          "x": 0,
          "y": 0,
          "z": 0
        }
      }
    },
    "7": {
      "id": 7,
      "name": "Hole3 Raw",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 8,
        "segments": 64
      }
    },
    "8": {
      "id": 8,
      "name": "Hole3 Place",
      "op": {
        "type": "Translate",
        "child": 7,
        "offset": {
          "x": 40,
          "y": 0,
          "z": 0
        }
      }
    },
    "9": {
      "id": 9,
      "name": "Holes12",
      "op": {
        "type": "Union",
        "left": 4,
        "right": 6
      }
    },
    "10": {
      "id": 10,
      "name": "AllHoles",
      "op": {
        "type": "Union",
        "left": 9,
        "right": 8
      }
    },
    "11": {
      "id": 11,
      "name": "Mounting Rail",
      "op": {
        "type": "Difference",
        "left": 2,
        "right": 10
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 2,
      "material": "default"
    },
    {
      "root": 3,
      "material": "default"
    },
    {
      "root": 4,
      "material": "default"
    },
    {
      "root": 5,
      "material": "default"
    },
    {
      "root": 6,
      "material": "default"
    },
    {
      "root": 7,
      "material": "default"
    },
    {
      "root": 8,
      "material": "default"
    },
    {
      "root": 9,
      "material": "default"
    },
    {
      "root": 10,
      "material": "default"
    },
    {
      "root": 11,
      "material": "default"
    }
  ]
}
mecheval · an evaluation suite by Municipal Robotics
sibling project: vcad. · github

generated 2026-06-19T01:47:55.656Z · static site, regenerate with npm run build -w @mecheval/leaderboard