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← mecheval. / run / a2-l-bracket-01 / claude-mcp-claude-opus-4-7 / 20260428T145833Z-d1a8

run 20260428T145833Z-d1a8

a2-l-bracket-01 · claude-mcp-claude-opus-4-7

Summary

statusfail
score0.17 (1/6)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-04-28T14:58:33.981Z
ended2026-04-28T15:00:52.230Z
tokens968,037 in · 5,750 out · 973,787 total
wallclock138.2s
tool calls36
task hashc8efa8964b7ad82a…
vcad hashb6bcedc2534e6408…

Prompt

Make an L-shaped mounting bracket. The base lies in the XY plane, occupying x in [0, 50], y in [0, 30], z in [0, 4] (50mm long, 30mm wide, 4mm thick). A vertical wall stands on the +X edge: x in [46, 50], y in [0, 30], z in [4, 30] (4mm thick, 30mm wide, rising to z = 30). Two through-holes of diameter 5mm pierce the base parallel to Z, centered at (10, 15) and (35, 15) on the top face. Output a single solid.

Checks

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

details: {
  "root_count": 4,
  "solids_produced": 4
}
1
bbox
fail
X off by -2.50mm
params + details 
params: {
  "type": "bbox",
  "min": [
    0,
    0,
    0
  ],
  "max": [
    50,
    30,
    30
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    50,
    30,
    30
  ],
  "actual_min": [
    -2.5,
    -2.5,
    -1
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    -2.5,
    -2.5,
    -1
  ],
  "max_abs_deviation_mm": 2.5,
  "tolerance_mm": 0.1
}
2
mass_props
fail
volume off by 5.7%
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 8962.92,
  "tolerance_pct": 0.5
}

details: {
  "volume": {
    "actual_mm3": 9472.861720089213,
    "deviation_pct": 5.689459686008723,
    "pass": false,
    "spec_mm3": 8962.92,
    "tolerance_pct": 0.5
  }
}
3
hole_count
fail
found 0/2 holes of ⌀5mm
params + details 
params: {
  "type": "hole_count",
  "diameter_mm": 5,
  "expected": 2,
  "diameter_tolerance_mm": 0.05
}

details: {
  "actual": 0,
  "diameter_mm": 5,
  "diameter_tolerance_mm": 0.05,
  "expected": 2,
  "found": []
}
4
hole_positions
fail
2/2 mispositioned
params + details 
params: {
  "type": "hole_positions",
  "diameter_mm": 5,
  "positions": [
    [
      10,
      15,
      0
    ],
    [
      35,
      15,
      0
    ]
  ],
  "tolerance_mm": 0.1
}

details: {
  "diameter_mm": 5,
  "per_expected": [
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        10,
        15
      ]
    },
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        35,
        15
      ]
    }
  ],
  "tolerance_mm": 0.1,
  "unmatched_extras": []
}
5
step_roundtrip
fail
STEP drift on 3/4 solids
params + details 
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 0.1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          50,
          30,
          30
        ],
        "original_min": [
          0,
          0,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          50,
          30,
          30
        ],
        "roundtripped_min": [
          0,
          0,
          0
        ],
        "tolerance_mm": 0.06557438524302
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 9120,
        "pass": true,
        "roundtripped_mm3": 9120
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          2.5,
          2.5,
          6
        ],
        "original_min": [
          -2.5,
          -2.5,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          2.5,
          2.5,
          6
        ],
        "roundtripped_min": [
          -2.5,
          -2.5,
          0
        ],
        "tolerance_mm": 0.01
      },
      "index": 1,
      "pass": false,
      "volume": {
        "deviation_pct": 0.48152755025699195,
        "original_mm3": 117.62056880471842,
        "pass": false,
        "roundtripped_mm3": 117.05419336115472
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          12.5,
          17.5,
          5
        ],
        "original_min": [
          7.5,
          12.5,
          -1
        ],
        "pass": true,
        "roundtripped_max": [
          12.5,
          17.5,
          5
        ],
        "roundtripped_min": [
          7.5,
          12.5,
          -1
        ],
        "tolerance_mm": 0.01
      },
      "index": 2,
      "pass": false,
      "volume": {
        "deviation_pct": 0.4815286035203956,
        "original_mm3": 117.62058247977802,
        "pass": false,
        "roundtripped_mm3": 117.05420573151059
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          2.5,
          2.5,
          6
        ],
        "original_min": [
          -2.5,
          -2.5,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          2.5,
          2.5,
          6
        ],
        "roundtripped_min": [
          -2.5,
          -2.5,
          0
        ],
        "tolerance_mm": 0.01
      },
      "index": 3,
      "pass": false,
      "volume": {
        "deviation_pct": 0.48152755025699195,
        "original_mm3": 117.62056880471842,
        "pass": false,
        "roundtripped_mm3": 117.05419336115472
      }
    }
  ],
  "tolerance_pct": 0.1
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create
err
13ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "difference",
  "name": "L-Bracket",
  "params": {
    "children": [
      {
        "type": "union",
        "params": {
          "children": [
            {
              "type": "cube",
              "params": {
                "size": [
                  50,
                  30,
                  4
                ]
              }
            },
            {
              "type": "translate",
              "params": {
                "offset": [
                  46,
                  0,
                  4
                ],
                "child": {
                  "type": "cube",
                  "params": {
                    "size": [
                      4,
                      30,
                      26
                    ]
                  }
                }
              }
            }
          ]
        }
      },
      {
        "type": "translate",
        "params": {
          "offset": [
            10,
            15,
            -1
          ],
          "child": {
            "type": "cylinder",
            "params": {
              "radius": 2.5,
              "height": 6
            }
          }
        }
      },
      {
        "type": "translate",
        "params": {
          "offset": [
            35,
            15,
            -1
          ],
          "child": {
            "type": "cylinder",
            "params": {
              "radius": 2.5,
              "height": 6
            }
          }
        }
      }
    ]
  }
}
2
create_cad_loon
ok
28ms
args
{
  "source": "[root\n  [pipe\n    [union\n      [translate 46 0 4 [cube 4 30 26]]\n      [cube 50 30 4]]\n    [difference [translate 10 15 -1 [cylinder 2.5 6]]]\n    [difference [translate 35 15 -1 [cylinder 2.5 6]]]]\n  \"steel\"]",
  "format": "json"
}
3
create
ok
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "Base",
  "params": {
    "size": {
      "x": 50,
      "y": 30,
      "z": 4
    }
  }
}
4
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "Wall_raw",
  "parent_part_id": "1",
  "params": {
    "size": {
      "x": 4,
      "y": 30,
      "z": 26
    }
  }
}
5
read
ok
3ms
args
{
  "document_id": "doc_1777388314183_1"
}
6
read
ok
6ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "1"
}
7
delete
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "1"
}
8
delete
ok
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "2"
}
9
create
ok
4ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "Base",
  "params": {
    "size": {
      "x": 50,
      "y": 30,
      "z": 4
    }
  }
}
10
create
ok
6ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "WallCube",
  "params": {
    "size": {
      "x": 4,
      "y": 30,
      "z": 26
    }
  }
}
11
create
err
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "translate",
  "name": "Wall_pos",
  "parent_part_id": "2",
  "params": {
    "offset": {
      "x": 46,
      "y": 0,
      "z": 4
    }
  }
}
12
create
ok
4ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "translate",
  "name": "Wall_pos",
  "parent_part_id": "2",
  "params": {
    "offset": {
      "x": 46,
      "y": 0,
      "z": 4
    },
    "child": 2
  }
}
13
read
ok
3ms
args
{
  "document_id": "doc_1777388314183_1"
}
14
read
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "3"
}
15
delete
ok
5ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "1"
}
16
delete
ok
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "2"
}
17
delete
ok
1ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "3"
}
18
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "Base",
  "params": {
    "size": {
      "x": 50,
      "y": 30,
      "z": 4
    }
  }
}
19
create
err
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "translate",
  "name": "Hole1Pos",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": 46,
      "y": 0,
      "z": 4
    },
    "shape": {
      "type": "cube",
      "params": {
        "size": {
          "x": 4,
          "y": 30,
          "z": 26
        }
      }
    }
  }
}
20
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cube",
  "name": "WallCube",
  "params": {
    "size": {
      "x": 4,
      "y": 30,
      "z": 26
    }
  }
}
21
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "translate",
  "name": "WallTrans",
  "parent_part_id": "2",
  "params": {
    "offset": {
      "x": 46,
      "y": 0,
      "z": 4
    },
    "child": 2
  }
}
22
read
ok
3ms
args
{
  "document_id": "doc_1777388314183_1"
}
23
create
ok
5ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "union",
  "name": "BaseAndWall",
  "parent_part_id": "1",
  "params": {
    "left": 1,
    "right": 3
  }
}
24
read
ok
2ms
args
{
  "document_id": "doc_1777388314183_1"
}
25
get_document
ok
2ms
args
{
  "document_id": "doc_1777388314183_1"
}
26
delete
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "1"
}
27
get_document
ok
1ms
args
{
  "document_id": "doc_1777388314183_1"
}
28
delete
ok
2ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "2"
}
29
delete
ok
1ms
args
{
  "document_id": "doc_1777388314183_1",
  "part_id": "3"
}
30
get_document
ok
1ms
args
{
  "document_id": "doc_1777388314183_1"
}
31
create
err
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cylinder",
  "name": "Hole1Cyl",
  "params": {
    "radius": 2.5,
    "height": 6
  }
}
32
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cylinder",
  "name": "Hole1Cyl",
  "params": {
    "radius": 2.5,
    "height": 6,
    "segments": 64
  }
}
33
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "translate",
  "name": "Hole1Pos",
  "parent_part_id": "5",
  "params": {
    "offset": {
      "x": 10,
      "y": 15,
      "z": -1
    },
    "child": 5
  }
}
34
create
ok
3ms
args
{
  "document_id": "doc_1777388314183_1",
  "type": "cylinder",
  "name": "Hole2Cyl",
  "params": {
    "radius": 2.5,
    "height": 6,
    "segments": 64
  }
}
35
get_document
ok
1ms
args
{
  "document_id": "doc_1777388314183_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260428T145833Z-d1a8.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Base",
      "op": {
        "type": "Cube",
        "size": {
          "x": 50,
          "y": 30,
          "z": 4
        }
      }
    },
    "2": {
      "id": 2,
      "name": "WallCube",
      "op": {
        "type": "Cube",
        "size": {
          "x": 4,
          "y": 30,
          "z": 26
        }
      }
    },
    "3": {
      "id": 3,
      "name": "WallTrans",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": 46,
          "y": 0,
          "z": 4
        }
      }
    },
    "4": {
      "id": 4,
      "name": "BaseAndWall",
      "op": {
        "type": "Union",
        "left": 1,
        "right": 3
      }
    },
    "5": {
      "id": 5,
      "name": "Hole1Cyl",
      "op": {
        "type": "Cylinder",
        "radius": 2.5,
        "height": 6,
        "segments": 64
      }
    },
    "6": {
      "id": 6,
      "name": "Hole1Pos",
      "op": {
        "type": "Translate",
        "child": 5,
        "offset": {
          "x": 10,
          "y": 15,
          "z": -1
        }
      }
    },
    "7": {
      "id": 7,
      "name": "Hole2Cyl",
      "op": {
        "type": "Cylinder",
        "radius": 2.5,
        "height": 6,
        "segments": 64
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 4,
      "material": "default"
    },
    {
      "root": 5,
      "material": "default"
    },
    {
      "root": 6,
      "material": "default"
    },
    {
      "root": 7,
      "material": "default"
    }
  ]
}
mecheval. · an evaluation suite by Municipal Robotics
sibling project: vcad. · github
drawing
mecheval.		 sheet
RUN · 20260428T145833Z-d1a8		 scale
1/6
date
2026-04-29		 drawn by
muni		 project
mecheval

generated 2026-04-29T00:03:43.147Z · static site, regenerate with npm run build -w @mecheval/leaderboard