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← mecheval. / run / a1-stepped-shaft-01 / claude-mcp-claude-opus-4-7 / 20260428T145724Z-9051

run 20260428T145724Z-9051

a1-stepped-shaft-01 · claude-mcp-claude-opus-4-7

Summary

statusPASS
score1.00 (4/4)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-04-28T14:57:24.508Z
ended2026-04-28T14:58:33.948Z
tokens399,769 in · 2,435 out · 402,204 total
wallclock69.4s
tool calls19
task hash0b362741f05ae514…
vcad hash5a7dd01b327c315f…

Prompt

Make a stepped shaft along the Z axis: a base cylinder of diameter 40mm and height 10mm sitting on the XY plane (z = 0 to z = 10), with a smaller coaxial cylinder of diameter 20mm and height 15mm stacked directly on top (z = 10 to z = 25). The result is a single solid.

Checks

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

details: {
  "root_count": 1,
  "solids_produced": 1
}
1
bbox
pass
params + details 
params: {
  "type": "bbox",
  "min": [
    -20,
    -20,
    0
  ],
  "max": [
    20,
    20,
    25
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    20,
    20,
    25
  ],
  "actual_min": [
    -20,
    -20,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.1
}
2
mass_props
pass
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 17278.76,
  "tolerance_pct": 1
}

details: {
  "volume": {
    "actual_mm3": 17251.016758025395,
    "deviation_pct": 0.16056269069426127,
    "pass": true,
    "spec_mm3": 17278.76,
    "tolerance_pct": 1
  }
}
3
step_roundtrip
pass
params + details 
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          20,
          20,
          25
        ],
        "original_min": [
          -20,
          -20,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          20,
          20,
          25
        ],
        "roundtripped_min": [
          -20,
          -20,
          0
        ],
        "tolerance_mm": 0.6184658438426491
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.5107110381514379,
        "original_mm3": 17251.01675802539,
        "pass": true,
        "roundtripped_mm3": 17162.9139112488
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create
err
12ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "union",
  "name": "Stepped Shaft",
  "params": {
    "children": [
      {
        "type": "cylinder",
        "params": {
          "radius": 20,
          "height": 10
        }
      },
      {
        "type": "translate",
        "params": {
          "x": 0,
          "y": 0,
          "z": 10,
          "child": {
            "type": "cylinder",
            "params": {
              "radius": 10,
              "height": 15
            }
          }
        }
      }
    ]
  }
}
2
create_cad_loon
ok
41ms
args
{
  "source": "[root [union [cylinder 20 10] [translate 0 0 10 [cylinder 10 15]]] \"steel\"]",
  "format": "json"
}
3
get_document
ok
1ms
args
{
  "document_id": "doc_1777388244710_1"
}
4
create
err
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "cylinder",
  "name": "Base",
  "params": {
    "radius": 20,
    "height": 10
  }
}
5
create
ok
4ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "cylinder",
  "name": "Base",
  "params": {
    "radius": 20,
    "height": 10,
    "segments": 64
  }
}
6
create
ok
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "cylinder",
  "name": "Top",
  "params": {
    "radius": 10,
    "height": 15,
    "segments": 64
  }
}
7
read
ok
2ms
args
{
  "document_id": "doc_1777388244710_1"
}
8
create
err
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "translate",
  "name": "Top Up",
  "parent_part_id": "2",
  "params": {
    "offset": {
      "x": 0,
      "y": 0,
      "z": 10
    }
  }
}
9
create
err
2ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "translate",
  "name": "Top Up",
  "params": {
    "offset": {
      "x": 0,
      "y": 0,
      "z": 10
    },
    "child": "2"
  }
}
10
create
ok
2ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "translate",
  "name": "Top Up",
  "params": {
    "offset": {
      "x": 0,
      "y": 0,
      "z": 10
    },
    "child": 2
  }
}
11
create
ok
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "type": "union",
  "name": "Stepped Shaft",
  "params": {
    "left": 1,
    "right": 3
  }
}
12
read
ok
1ms
args
{
  "document_id": "doc_1777388244710_1"
}
13
get_document
ok
1ms
args
{
  "document_id": "doc_1777388244710_1"
}
14
delete
ok
2ms
args
{
  "document_id": "doc_1777388244710_1",
  "part_id": "1"
}
15
delete
ok
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "part_id": "2"
}
16
delete
ok
1ms
args
{
  "document_id": "doc_1777388244710_1",
  "part_id": "3"
}
17
get_document
ok
2ms
args
{
  "document_id": "doc_1777388244710_1"
}
18
get_document
ok
1ms
args
{
  "document_id": "doc_1777388244710_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260428T145724Z-9051.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Base",
      "op": {
        "type": "Cylinder",
        "radius": 20,
        "height": 10,
        "segments": 64
      }
    },
    "2": {
      "id": 2,
      "name": "Top",
      "op": {
        "type": "Cylinder",
        "radius": 10,
        "height": 15,
        "segments": 64
      }
    },
    "3": {
      "id": 3,
      "name": "Top Up",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": 0,
          "y": 0,
          "z": 10
        }
      }
    },
    "4": {
      "id": 4,
      "name": "Stepped Shaft",
      "op": {
        "type": "Union",
        "left": 1,
        "right": 3
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 4,
      "material": "default"
    }
  ]
}
mecheval. · an evaluation suite by Municipal Robotics
sibling project: vcad. · github
drawing
mecheval.		 sheet
RUN · 20260428T145724Z-9051		 scale
PASS
date
2026-04-29		 drawn by
muni		 project
mecheval

generated 2026-04-29T00:03:43.123Z · static site, regenerate with npm run build -w @mecheval/leaderboard