← mecheval / run / a3-tangent-cylinders-01 / claude-mcp-claude-opus-4-7 / 20260611T182937Z-2dd9

run 20260611T182937Z-2dd9

a3-tangent-cylinders-01 · claude-mcp-claude-opus-4-7

Summary

status	fail
score	0.75 (3/4)
submission	self-run
model	claude-mcp-claude-opus-4-7 (anthropic)
started	2026-06-11T18:29:37.482Z
ended	2026-06-11T18:30:28.563Z
tokens	257,206 in · 2,873 out · 260,079 total
wallclock	51.1s
tool calls	20
task hash	`3c9319f74706d04c…`
vcad hash	`9a81d4b9c013896c…`

Prompt

Make a single solid consisting of two cylinders fused together. Big cylinder: outside diameter 50mm, axis along Z, base on the XY plane (z = 0 to z = 40), centered on the Z axis. Small cylinder: outside diameter 10mm, axis along Z, base on the XY plane (z = 0 to z = 40), positioned so that its outer surface is externally tangent to the big cylinder's outer surface on the +X side. The two cylinders share exactly one tangent line (no overlap, no gap). Output a single solid (the union of the two cylinders).

Checks

valid_solid

pass

params + details

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 4,
  "solids_produced": 4
}

bbox

pass

params + details

params: {
  "type": "bbox",
  "min": [
    -25,
    -25,
    0
  ],
  "max": [
    35,
    25,
    40
  ],
  "tolerance_mm": 0.2
}

details: {
  "actual_max": [
    35,
    25,
    40
  ],
  "actual_min": [
    -25,
    -25,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.2
}

mass_props

fail

volume off by 103.5%

params + details

params: {
  "type": "mass_props",
  "volume_mm3": 81681.41,
  "tolerance_pct": 1
}

details: {
  "volume": {
    "actual_mm3": 166206.86381786526,
    "deviation_pct": 103.48187404926685,
    "pass": false,
    "spec_mm3": 81681.41,
    "tolerance_pct": 1
  }
}

step_roundtrip

pass

params + details

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          25,
          25,
          40
        ],
        "original_min": [
          -25,
          -25,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          25,
          25,
          40
        ],
        "roundtripped_min": [
          -25,
          -25,
          0
        ],
        "tolerance_mm": 0.8124038404635961
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.4815246536494272,
        "original_mm3": 78413.71233533505,
        "pass": true,
        "roundtripped_mm3": 78036.13097859867
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          5,
          5,
          40
        ],
        "original_min": [
          -5,
          -5,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          5,
          5,
          40
        ],
        "roundtripped_min": [
          -5,
          -5,
          0
        ],
        "tolerance_mm": 0.42426406871192857
      },
      "index": 1,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 3121.4451562974587,
        "pass": true,
        "roundtripped_mm3": 3121.4451562974587
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          35,
          5,
          40
        ],
        "original_min": [
          25,
          -5,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          35,
          5,
          40
        ],
        "roundtripped_min": [
          25,
          -5,
          0
        ],
        "tolerance_mm": 0.42426406871192857
      },
      "index": 2,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 3121.4452834188614,
        "pass": true,
        "roundtripped_mm3": 3121.4452834188614
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          35,
          25,
          40
        ],
        "original_min": [
          -25,
          -25,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          35,
          25,
          40
        ],
        "roundtripped_min": [
          -25,
          -25,
          0
        ],
        "tolerance_mm": 0.8774964387392121
      },
      "index": 3,
      "pass": true,
      "volume": {
        "deviation_pct": 0.4815248605890577,
        "original_mm3": 81550.2610428139,
        "pass": true,
        "roundtripped_mm3": 81157.57626201748
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

open_document

2ms

args

{}

create

err

4ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "Big Cylinder",
  "params": {
    "radius": 25,
    "height": 40
  }
}

create

err

1ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "Small Cylinder",
  "params": {
    "radius": 5,
    "height": 40,
    "origin": {
      "x": 30,
      "y": 0,
      "z": 0
    }
  }
}

create_cad_loon

11ms

args

{
  "source": "[union [translate 30 0 0 [cylinder 5 40]] [cylinder 25 40]]"
}

create

4ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "Big Cylinder",
  "params": {
    "radius": 25,
    "height": 40,
    "segments": 64
  }
}

create

3ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "Small Cylinder",
  "params": {
    "radius": 5,
    "height": 40,
    "segments": 32
  }
}

create

err

3ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "translate",
  "name": "Position Small",
  "parent_part_id": "2",
  "params": {
    "x": 30,
    "y": 0,
    "z": 0
  }
}

read

4ms

args

{
  "document_id": "doc_1781202577657_1"
}

delete

3ms

args

{
  "document_id": "doc_1781202577657_1",
  "part_id": "1"
}

delete

2ms

args

{
  "document_id": "doc_1781202577657_1",
  "part_id": "2"
}

create

5ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "Big",
  "params": {
    "radius": 25,
    "height": 40,
    "segments": 64
  }
}

create

1ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "cylinder",
  "name": "SmallRaw",
  "params": {
    "radius": 5,
    "height": 40,
    "segments": 32
  }
}

create

err

1ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "translate",
  "name": "PositionSmall",
  "params": {
    "x": 30,
    "y": 0,
    "z": 0,
    "child": "2"
  }
}

create

err

2ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "translate",
  "name": "PositionSmall",
  "params": {
    "x": 30,
    "y": 0,
    "z": 0,
    "child": 2
  }
}

create

2ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "translate",
  "name": "PositionSmall",
  "params": {
    "offset": {
      "x": 30,
      "y": 0,
      "z": 0
    },
    "child": 2
  }
}

create

err

4ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "union",
  "name": "Combined",
  "params": {
    "a": 1,
    "b": 3
  }
}

create

1ms

args

{
  "document_id": "doc_1781202577657_1",
  "type": "union",
  "name": "Combined",
  "params": {
    "left": 1,
    "right": 3
  }
}

read

2ms

args

{
  "document_id": "doc_1781202577657_1"
}

render_view

118ms

args

{
  "document_id": "doc_1781202577657_1"
}

get_document

1ms

args

{
  "document_id": "doc_1781202577657_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T182937Z-2dd9.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Big",
      "op": {
        "type": "Cylinder",
        "radius": 25,
        "height": 40,
        "segments": 64
      }
    },
    "2": {
      "id": 2,
      "name": "SmallRaw",
      "op": {
        "type": "Cylinder",
        "radius": 5,
        "height": 40,
        "segments": 32
      }
    },
    "3": {
      "id": 3,
      "name": "PositionSmall",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": 30,
          "y": 0,
          "z": 0
        }
      }
    },
    "4": {
      "id": 4,
      "name": "Combined",
      "op": {
        "type": "Union",
        "left": 1,
        "right": 3
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 1,
      "material": "default"
    },
    {
      "root": 2,
      "material": "default"
    },
    {
      "root": 3,
      "material": "default"
    },
    {
      "root": 4,
      "material": "default"
    }
  ]
}

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