← mecheval / run / a5-u-bracket-01 / claude-mcp-claude-opus-4-7 / 20260611T230154Z-90a9

run 20260611T230154Z-90a9

a5-u-bracket-01 · claude-mcp-claude-opus-4-7

Summary

statusfail
score0.33 (2/6)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-06-11T23:01:54.701Z
ended2026-06-11T23:04:01.425Z
tokens609,729 in · 7,388 out · 617,117 total
wallclock126.7s
tool calls36
task hashe2050e1f3a71142b…
vcad hash3409e1425547bc09…

Prompt

Make a U-channel bracket as a single solid. The base is a rectangular plate 100mm × 30mm × 8mm with its bottom face on the XY plane, centered in X and Y (so it spans x in [-50, 50], y in [-15, 15], z in [0, 8]). From the left end of the base, a vertical leg rises: 8mm × 30mm × 35mm, at x in [-50, -42], y in [-15, 15], z in [8, 43]. A matching vertical leg rises from the right end: 8mm × 30mm × 35mm, at x in [42, 50], y in [-15, 15], z in [8, 43]. Drill two through-holes of diameter 6mm, axes parallel to Z, through the base only (z = 0 to z = 8), centered at (-25, 0) and (25, 0). Output a single solid.

Checks

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

details: {
  "root_count": 5,
  "solids_produced": 5
}
1
bbox
fail
X off by +50.00mm
params + details 
params: {
  "type": "bbox",
  "min": [
    -50,
    -15,
    0
  ],
  "max": [
    50,
    15,
    43
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    100,
    30,
    43
  ],
  "actual_min": [
    -50,
    -15,
    0
  ],
  "deviation_max": [
    50,
    15,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 50,
  "tolerance_mm": 0.1
}
2
mass_props
fail
volume off by 140.9%
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 40347.61,
  "center_of_mass": [
    0,
    0,
    12.95
  ],
  "tolerance_pct": 1
}

details: {
  "center_of_mass": {
    "actual": [
      4.7407407407407405,
      5,
      8.882716049382717
    ],
    "bbox_diagonal_mm": 162.40073891457513,
    "deviation": [
      4.7407407407407405,
      5,
      -4.067283950617282
    ],
    "max_abs_deviation_mm": 5,
    "pass": false,
    "spec": [
      0,
      0,
      12.95
    ],
    "tolerance_mm": 1.6240073891457514
  },
  "volume": {
    "actual_mm3": 97200,
    "deviation_pct": 140.90646261327498,
    "pass": false,
    "spec_mm3": 40347.61,
    "tolerance_pct": 1
  }
}
3
hole_count
fail
found 0/2 holes of ⌀6mm
params + details 
params: {
  "type": "hole_count",
  "diameter_mm": 6,
  "expected": 2,
  "diameter_tolerance_mm": 0.05
}

details: {
  "actual": 0,
  "diameter_mm": 6,
  "diameter_tolerance_mm": 0.05,
  "expected": 2,
  "found": []
}
4
hole_positions
fail
2/2 mispositioned
params + details 
params: {
  "type": "hole_positions",
  "diameter_mm": 6,
  "positions": [
    [
      -25,
      0,
      0
    ],
    [
      25,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.2
}

details: {
  "diameter_mm": 6,
  "per_expected": [
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        -25,
        0
      ]
    },
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        25,
        0
      ]
    }
  ],
  "tolerance_mm": 0.2,
  "unmatched_extras": []
}
5
step_roundtrip
pass
params + details 
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          100,
          30,
          8
        ],
        "original_min": [
          0,
          0,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          100,
          30,
          8
        ],
        "roundtripped_min": [
          0,
          0,
          0
        ],
        "tolerance_mm": 1.047091209016674
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 24000,
        "pass": true,
        "roundtripped_mm3": 24000
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          50,
          15,
          8
        ],
        "original_min": [
          -50,
          -15,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          50,
          15,
          8
        ],
        "roundtripped_min": [
          -50,
          -15,
          0
        ],
        "tolerance_mm": 1.047091209016674
      },
      "index": 1,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 24000,
        "pass": true,
        "roundtripped_mm3": 24000
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          8,
          30,
          35
        ],
        "original_min": [
          0,
          0,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          8,
          30,
          35
        ],
        "roundtripped_min": [
          0,
          0,
          0
        ],
        "tolerance_mm": 0.4678675026115834
      },
      "index": 2,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 8400,
        "pass": true,
        "roundtripped_mm3": 8400
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          -42,
          15,
          43
        ],
        "original_min": [
          -50,
          -15,
          8
        ],
        "pass": true,
        "roundtripped_max": [
          -42,
          15,
          43
        ],
        "roundtripped_min": [
          -50,
          -15,
          8
        ],
        "tolerance_mm": 0.4678675026115834
      },
      "index": 3,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 8400,
        "pass": true,
        "roundtripped_mm3": 8400
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          50,
          15,
          43
        ],
        "original_min": [
          -50,
          -15,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          50,
          15,
          43
        ],
        "roundtripped_min": [
          -50,
          -15,
          0
        ],
        "tolerance_mm": 1.1291146974510606
      },
      "index": 4,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 32400,
        "pass": true,
        "roundtripped_mm3": 32400
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create
err
6ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "difference",
  "name": "U-Channel Bracket",
  "params": {
    "subject": {
      "type": "union",
      "params": {
        "a": {
          "type": "union",
          "params": {
            "a": {
              "type": "translate",
              "params": {
                "x": -50,
                "y": -15,
                "z": 0,
                "subject": {
                  "type": "cube",
                  "params": {
                    "x": 100,
                    "y": 30,
                    "z": 8
                  }
                }
              }
            },
            "b": {
              "type": "translate",
              "params": {
                "x": -50,
                "y": -15,
                "z": 8,
                "subject": {
                  "type": "cube",
                  "params": {
                    "x": 8,
                    "y": 30,
                    "z": 35
                  }
                }
              }
            }
          }
        },
        "b": {
          "type": "translate",
          "params": {
            "x": 42,
            "y": -15,
            "z": 8,
            "subject": {
              "type": "cube",
              "params": {
                "x": 8,
                "y": 30,
                "z": 35
              }
            }
          }
        }
      }
    },
    "tool": {
      "type": "union",
      "params": {
        "a": {
          "type": "translate",
          "params": {
            "x": -25,
            "y": 0,
            "z": -0.1,
            "subject": {
              "type": "cylinder",
              "params": {
                "r": 3,
                "h": 8.2
              }
            }
          }
        },
        "b": {
          "type": "translate",
          "params": {
            "x": 25,
            "y": 0,
            "z": -0.1,
            "subject": {
              "type": "cylinder",
              "params": {
                "r": 3,
                "h": 8.2
              }
            }
          }
        }
      }
    }
  }
}
2
create_cad_loon
ok
11ms
args
{
  "source": "[let base [translate -50 -15 0 [cube 100 30 8]]\n  [let leg-left [translate -50 -15 8 [cube 8 30 35]]\n    [let leg-right [translate 42 -15 8 [cube 8 30 35]]\n      [let body [union leg-left [union leg-right base]]\n        [let hole-l [translate -25 0 -0.1 [cylinder 3 8.2]]\n          [let hole-r [translate 25 0 -0.1 [cylinder 3 8.2]]\n            [root [difference hole-l [difference hole-r body]] \"steel\"]]]]]]]",
  "format": "json"
}
3
create
err
5ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "difference",
  "name": "U-Channel Bracket",
  "params": {
    "left": {
      "type": "union",
      "params": {
        "left": {
          "type": "union",
          "params": {
            "left": {
              "type": "translate",
              "params": {
                "offset": {
                  "x": -50,
                  "y": -15,
                  "z": 0
                },
                "child": {
                  "type": "cube",
                  "params": {
                    "size": {
                      "x": 100,
                      "y": 30,
                      "z": 8
                    }
                  }
                }
              }
            },
            "right": {
              "type": "translate",
              "params": {
                "offset": {
                  "x": -50,
                  "y": -15,
                  "z": 8
                },
                "child": {
                  "type": "cube",
                  "params": {
                    "size": {
                      "x": 8,
                      "y": 30,
                      "z": 35
                    }
                  }
                }
              }
            }
          }
        },
        "right": {
          "type": "translate",
          "params": {
            "offset": {
              "x": 42,
              "y": -15,
              "z": 8
            },
            "child": {
              "type": "cube",
              "params": {
                "size": {
                  "x": 8,
                  "y": 30,
                  "z": 35
                }
              }
            }
          }
        }
      }
    },
    "right": {
      "type": "union",
      "params": {
        "left": {
          "type": "translate",
          "params": {
            "offset": {
              "x": -25,
              "y": 0,
              "z": -0.1
            },
            "child": {
              "type": "cylinder",
              "params": {
                "radius": 3,
                "height": 8.2
              }
            }
          }
        },
        "right": {
          "type": "translate",
          "params": {
            "offset": {
              "x": 25,
              "y": 0,
              "z": -0.1
            },
            "child": {
              "type": "cylinder",
              "params": {
                "radius": 3,
                "height": 8.2
              }
            }
          }
        }
      }
    }
  }
}
4
create
ok
4ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "base_cube",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}
5
read
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "1"
}
6
create
ok
6ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "translate",
  "name": "base_pos",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    },
    "child": 1
  }
}
7
read
ok
6ms
args
{
  "document_id": "doc_1781218914881_1"
}
8
read
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
9
delete
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "1"
}
10
read
ok
5ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
11
create
ok
4ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "leg_left_cube",
  "parent_part_id": "2",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}
12
read
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "3"
}
13
read
ok
2ms
args
{
  "document_id": "doc_1781218914881_1"
}
14
delete
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
15
delete
ok
1ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "3"
}
16
create
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "base",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}
17
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "translate",
  "name": "base_pos",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    },
    "child": 1
  }
}
18
read
ok
3ms
args
{
  "document_id": "doc_1781218914881_1"
}
19
create
err
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "union",
  "name": "add_left_leg",
  "parent_part_id": "2",
  "params": {
    "left": 2,
    "right": {
      "type": "translate",
      "params": {
        "offset": {
          "x": -50,
          "y": -15,
          "z": 8
        },
        "child": {
          "type": "cube",
          "params": {
            "size": {
              "x": 8,
              "y": 30,
              "z": 35
            }
          }
        }
      }
    }
  }
}
20
read
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
21
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "leg_left_raw",
  "parent_part_id": "2",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}
22
read
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
23
read
ok
1ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "3"
}
24
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "union",
  "name": "u1",
  "parent_part_id": "2",
  "params": {
    "left": 2,
    "right": 3
  }
}
25
read
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "4"
}
26
delete
ok
2ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "1"
}
27
delete
ok
1ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "2"
}
28
delete
ok
1ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "3"
}
29
delete
ok
1ms
args
{
  "document_id": "doc_1781218914881_1",
  "part_id": "4"
}
30
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "base_cube",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}
31
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "translate",
  "name": "base_pos",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    },
    "child": 1
  }
}
32
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "cube",
  "name": "leg_L_cube",
  "parent_part_id": "2",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}
33
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "translate",
  "name": "leg_L_pos",
  "parent_part_id": "3",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 8
    },
    "child": 3
  }
}
34
create
ok
3ms
args
{
  "document_id": "doc_1781218914881_1",
  "type": "union",
  "name": "base_plus_L",
  "parent_part_id": "4",
  "params": {
    "left": 2,
    "right": 4
  }
}
35
get_document
ok
1ms
args
{
  "document_id": "doc_1781218914881_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T230154Z-90a9.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "base_cube",
      "op": {
        "type": "Cube",
        "size": {
          "x": 100,
          "y": 30,
          "z": 8
        }
      }
    },
    "2": {
      "id": 2,
      "name": "base_pos",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": {
          "x": -50,
          "y": -15,
          "z": 0
        }
      }
    },
    "3": {
      "id": 3,
      "name": "leg_L_cube",
      "op": {
        "type": "Cube",
        "size": {
          "x": 8,
          "y": 30,
          "z": 35
        }
      }
    },
    "4": {
      "id": 4,
      "name": "leg_L_pos",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {
          "x": -50,
          "y": -15,
          "z": 8
        }
      }
    },
    "5": {
      "id": 5,
      "name": "base_plus_L",
      "op": {
        "type": "Union",
        "left": 2,
        "right": 4
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 1,
      "material": "default"
    },
    {
      "root": 2,
      "material": "default"
    },
    {
      "root": 3,
      "material": "default"
    },
    {
      "root": 4,
      "material": "default"
    },
    {
      "root": 5,
      "material": "default"
    }
  ]
}
mecheval · an evaluation suite by Municipal Robotics
sibling project: vcad. · github

generated 2026-06-19T01:47:56.249Z · static site, regenerate with npm run build -w @mecheval/leaderboard