← mecheval / run / a2-mounting-rail-01 / claude-mcp-claude-opus-4-7 / 20260611T174710Z-648a

run 20260611T174710Z-648a

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

Summary

statusfail
score0.33 (2/6)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-06-11T17:47:10.833Z
ended2026-06-11T17:51:07.150Z
tokens576,502 in · 5,275 out · 581,777 total
wallclock236.3s
tool calls32
task hashe375cec77275714a…
vcad hash0227358feea2c85e…

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": 1,
  "solids_produced": 1
}
1
bbox
fail
X off by -47.00mm
params + details 
params: {
  "type": "bbox",
  "min": [
    -50,
    -10,
    0
  ],
  "max": [
    50,
    10,
    8
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    3,
    3,
    10
  ],
  "actual_min": [
    -3,
    -3,
    0
  ],
  "deviation_max": [
    -47,
    -7,
    2
  ],
  "deviation_min": [
    47,
    7,
    0
  ],
  "max_abs_deviation_mm": 47,
  "tolerance_mm": 0.1
}
2
mass_props
fail
volume off by 98.2%
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 15321.42,
  "tolerance_pct": 0.5
}

details: {
  "volume": {
    "actual_mm3": 282.2893690836236,
    "deviation_pct": 98.15755087267614,
    "pass": false,
    "spec_mm3": 15321.42,
    "tolerance_pct": 0.5
  }
}
3
hole_count
fail
found 0/3 holes of ⌀6mm
params + details 
params: {
  "type": "hole_count",
  "diameter_mm": 6,
  "expected": 3,
  "diameter_tolerance_mm": 0.05
}

details: {
  "actual": 0,
  "diameter_mm": 6,
  "diameter_tolerance_mm": 0.05,
  "expected": 3,
  "found": []
}
4
hole_positions
fail
3/3 mispositioned
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": [
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        -40,
        0
      ]
    },
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        0,
        0
      ]
    },
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "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": [
          3,
          3,
          10
        ],
        "original_min": [
          -3,
          -3,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          3,
          3,
          10
        ],
        "roundtripped_min": [
          -3,
          -3,
          0
        ],
        "tolerance_mm": 0.06557438524302
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.4815287441197193,
        "original_mm3": 282.2893690836236,
        "pass": true,
        "roundtripped_mm3": 280.9300646298918
      }
    }
  ],
  "tolerance_pct": 0.5
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create
err
6ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "difference",
  "name": "Mounting Rail",
  "params": {
    "tool": {
      "type": "union",
      "children": [
        {
          "type": "translate",
          "x": -40,
          "y": 0,
          "z": -1,
          "child": {
            "type": "cylinder",
            "r": 3,
            "h": 10
          }
        },
        {
          "type": "translate",
          "x": 0,
          "y": 0,
          "z": -1,
          "child": {
            "type": "cylinder",
            "r": 3,
            "h": 10
          }
        },
        {
          "type": "translate",
          "x": 40,
          "y": 0,
          "z": -1,
          "child": {
            "type": "cylinder",
            "r": 3,
            "h": 10
          }
        }
      ]
    },
    "subject": {
      "type": "translate",
      "x": -50,
      "y": -10,
      "z": 0,
      "child": {
        "type": "cube",
        "x": 100,
        "y": 20,
        "z": 8
      }
    }
  }
}
2
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1"
}
3
create
err
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cube",
  "name": "Rail Body",
  "params": {
    "x": 100,
    "y": 20,
    "z": 8
  }
}
4
create_cad_loon
ok
13ms
args
{
  "source": "[root\n  [difference\n    [union\n      [translate -40 0 -1 [cylinder 3 10]]\n      [union\n        [translate 0 0 -1 [cylinder 3 10]]\n        [translate 40 0 -1 [cylinder 3 10]]]]\n    [translate -50 -10 0 [cube 100 20 8]]]\n  \"steel\"]",
  "format": "json"
}
5
create
ok
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cube",
  "name": "Rail Body",
  "params": {
    "size": {
      "x": 100,
      "y": 20,
      "z": 8
    }
  }
}
6
read
ok
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
7
delete
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
8
create
ok
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cube",
  "name": "Rail",
  "params": {
    "size": {
      "x": 100,
      "y": 20,
      "z": 8
    }
  }
}
9
create
ok
5ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "translate",
  "name": "Center Rail",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -10,
      "z": 0
    },
    "child": 1
  }
}
10
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1"
}
11
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "2"
}
12
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
13
delete
ok
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
14
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "2"
}
15
create
err
5ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cylinder",
  "name": "Hole1 Cyl",
  "parent_part_id": "2",
  "params": {
    "radius": 3,
    "height": 10
  }
}
16
create
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cylinder",
  "name": "Hole1 Cyl",
  "parent_part_id": "2",
  "params": {
    "radius": 3,
    "height": 10,
    "segments": 64
  }
}
17
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1"
}
18
delete
ok
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "2"
}
19
delete
ok
2ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "3"
}
20
create
err
4ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "difference",
  "name": "Mounting Rail",
  "params": {
    "left": {
      "type": "Translate",
      "offset": {
        "x": -50,
        "y": -10,
        "z": 0
      },
      "child": {
        "type": "Cube",
        "size": {
          "x": 100,
          "y": 20,
          "z": 8
        }
      }
    },
    "right": {
      "type": "Union",
      "left": {
        "type": "Translate",
        "offset": {
          "x": -40,
          "y": 0,
          "z": -1
        },
        "child": {
          "type": "Cylinder",
          "radius": 3,
          "height": 10,
          "segments": 64
        }
      },
      "right": {
        "type": "Union",
        "left": {
          "type": "Translate",
          "offset": {
            "x": 0,
            "y": 0,
            "z": -1
          },
          "child": {
            "type": "Cylinder",
            "radius": 3,
            "height": 10,
            "segments": 64
          }
        },
        "right": {
          "type": "Translate",
          "offset": {
            "x": 40,
            "y": 0,
            "z": -1
          },
          "child": {
            "type": "Cylinder",
            "radius": 3,
            "height": 10,
            "segments": 64
          }
        }
      }
    }
  }
}
21
create
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cube",
  "name": "cube",
  "params": {
    "size": {
      "x": 100,
      "y": 20,
      "z": 8
    }
  }
}
22
create
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "translate",
  "name": "tcube",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -10,
      "z": 0
    },
    "child": 1
  }
}
23
read
ok
2ms
args
{
  "document_id": "doc_1781200031011_1"
}
24
read
ok
2ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
25
delete
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "1"
}
26
create
ok
2ms
args
{
  "document_id": "doc_1781200031011_1",
  "type": "cylinder",
  "name": "c1",
  "parent_part_id": "2",
  "params": {
    "radius": 3,
    "height": 10,
    "segments": 64
  }
}
27
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1"
}
28
read
ok
3ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "2"
}
29
read
ok
2ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "3"
}
30
delete
ok
5ms
args
{
  "document_id": "doc_1781200031011_1",
  "part_id": "2"
}
31
get_document
ok
2ms
args
{
  "document_id": "doc_1781200031011_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T174710Z-648a.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "3": {
      "id": 3,
      "name": "c1",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 10,
        "segments": 64
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 3,
      "material": "default"
    }
  ]
}
mecheval · an evaluation suite by Municipal Robotics
sibling project: vcad. · github

generated 2026-06-19T01:47:55.654Z · static site, regenerate with npm run build -w @mecheval/leaderboard