← mecheval / run / a5-u-bracket-01 / claude-mcp-claude-opus-4-7 / 20260611T225944Z-2753

run 20260611T225944Z-2753

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

Summary

status	fail
score	0.50 (3/6)
submission	self-run
model	claude-mcp-claude-opus-4-7 (anthropic)
started	2026-06-11T22:59:44.540Z
ended	2026-06-11T23:01:54.666Z
tokens	640,289 in · 6,824 out · 647,113 total
wallclock	130.1s
tool calls	40
task hash	`e2050e1f3a71142b…`
vcad hash	`fcb6dc3f0166d1ed…`

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

valid_solid

pass

params + details

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 3,
  "solids_produced": 3
}

bbox

pass

params + details

params: {
  "type": "bbox",
  "min": [
    -50,
    -15,
    0
  ],
  "max": [
    50,
    15,
    43
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    50,
    15,
    43
  ],
  "actual_min": [
    -50,
    -15,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.1
}

mass_props

fail

volume off by 60.6%

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": [
      -11.925925925925926,
      0,
      9.574074074074074
    ],
    "bbox_diagonal_mm": 112.91146974510606,
    "deviation": [
      -11.925925925925926,
      0,
      -3.375925925925925
    ],
    "max_abs_deviation_mm": 11.925925925925926,
    "pass": false,
    "spec": [
      0,
      0,
      12.95
    ],
    "tolerance_mm": 1.1291146974510606
  },
  "volume": {
    "actual_mm3": 64800,
    "deviation_pct": 60.604308408849995,
    "pass": false,
    "spec_mm3": 40347.61,
    "tolerance_pct": 1
  }
}

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": []
}

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": []
}

step_roundtrip

pass

params + details

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

details: {
  "per_solid": [
    {
      "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": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 24000,
        "pass": true,
        "roundtripped_mm3": 24000
      }
    },
    {
      "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": 1,
      "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": 2,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 32400,
        "pass": true,
        "roundtripped_mm3": 32400
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

open_document

2ms

args

{}

create

err

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "difference",
  "name": "U-Channel Bracket",
  "params": {
    "a": {
      "type": "union",
      "params": {
        "a": {
          "type": "translate",
          "params": {
            "x": -50,
            "y": -15,
            "z": 0,
            "s": {
              "type": "cube",
              "params": {
                "x": 100,
                "y": 30,
                "z": 8
              }
            }
          }
        },
        "b": {
          "type": "union",
          "params": {
            "a": {
              "type": "translate",
              "params": {
                "x": -50,
                "y": -15,
                "z": 8,
                "s": {
                  "type": "cube",
                  "params": {
                    "x": 8,
                    "y": 30,
                    "z": 35
                  }
                }
              }
            },
            "b": {
              "type": "translate",
              "params": {
                "x": 42,
                "y": -15,
                "z": 8,
                "s": {
                  "type": "cube",
                  "params": {
                    "x": 8,
                    "y": 30,
                    "z": 35
                  }
                }
              }
            }
          }
        }
      }
    },
    "b": {
      "type": "union",
      "params": {
        "a": {
          "type": "translate",
          "params": {
            "x": -25,
            "y": 0,
            "z": -0.1,
            "s": {
              "type": "cylinder",
              "params": {
                "r": 3,
                "h": 8.2
              }
            }
          }
        },
        "b": {
          "type": "translate",
          "params": {
            "x": 25,
            "y": 0,
            "z": -0.1,
            "s": {
              "type": "cylinder",
              "params": {
                "r": 3,
                "h": 8.2
              }
            }
          }
        }
      }
    }
  }
}

create_cad_loon

13ms

args

{
  "source": "[let\n  base [translate -50 -15 0 [cube 100 30 8]]\n  leftLeg [translate -50 -15 8 [cube 8 30 35]]\n  rightLeg [translate 42 -15 8 [cube 8 30 35]]\n  hole1 [translate -25 0 -0.1 [cylinder 3 8.2]]\n  hole2 [translate 25 0 -0.1 [cylinder 3 8.2]]\n  body [union leftLeg [union rightLeg base]]\n  [root [difference hole1 [difference hole2 body]] \"steel\"]]",
  "format": "json"
}

create

err

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "probe",
  "params": {
    "x": 1,
    "y": 1,
    "z": 1
  }
}

create

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "base",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}

read

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "1"
}

delete

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "1"
}

create_cad_loon

4ms

args

{
  "source": "[difference\n  [union\n    [translate -50 -15 0 [cube 100 30 8]]\n    [union\n      [translate -50 -15 8 [cube 8 30 35]]\n      [translate 42 -15 8 [cube 8 30 35]]]]\n  [union\n    [translate -25 0 -0.1 [cylinder 3 8.2]]\n    [translate 25 0 -0.1 [cylinder 3 8.2]]]]",
  "format": "json"
}

create

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "base_cube",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}

create

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "left_leg_cube",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}

create

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "right_leg_cube",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}

create

err

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cylinder",
  "name": "hole1_cyl",
  "params": {
    "radius": 3,
    "height": 8.2
  }
}

create

err

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cylinder",
  "name": "hole2_cyl",
  "params": {
    "radius": 3,
    "height": 8.2
  }
}

delete

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "1"
}

delete

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "2"
}

delete

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "3"
}

read

3ms

args

{
  "document_id": "doc_1781218784711_1"
}

create

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "base",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}

create

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "translate",
  "name": "base_pos",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    },
    "child": 1
  }
}

read

3ms

args

{
  "document_id": "doc_1781218784711_1"
}

read

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "2"
}

create

5ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "left_leg_raw",
  "parent_part_id": "2",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}

read

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "3"
}

read

3ms

args

{
  "document_id": "doc_1781218784711_1"
}

delete

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "1"
}

delete

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "2"
}

delete

1ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "3"
}

create

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "base",
  "params": {
    "size": {
      "x": 100,
      "y": 30,
      "z": 8
    }
  }
}

create

err

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "translate",
  "name": "base_t",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    }
  }
}

create

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "translate",
  "name": "base_t",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 0
    },
    "child": 1
  }
}

read

3ms

args

{
  "document_id": "doc_1781218784711_1"
}

get_document

2ms

args

{
  "document_id": "doc_1781218784711_1"
}

delete

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "1"
}

get_document

1ms

args

{
  "document_id": "doc_1781218784711_1"
}

create

4ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "cube",
  "name": "left_leg",
  "params": {
    "size": {
      "x": 8,
      "y": 30,
      "z": 35
    }
  }
}

create

2ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "translate",
  "name": "left_leg_t",
  "parent_part_id": "3",
  "params": {
    "offset": {
      "x": -50,
      "y": -15,
      "z": 8
    },
    "child": 3
  }
}

delete

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "part_id": "3"
}

create

3ms

args

{
  "document_id": "doc_1781218784711_1",
  "type": "union",
  "name": "base_plus_left",
  "params": {
    "left": 2,
    "right": 4
  }
}

get_document

3ms

args

{
  "document_id": "doc_1781218784711_1"
}

get_document

1ms

args

{
  "document_id": "doc_1781218784711_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T225944Z-2753.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "base",
      "op": {
        "type": "Cube",
        "size": {
          "x": 100,
          "y": 30,
          "z": 8
        }
      }
    },
    "2": {
      "id": 2,
      "name": "base_t",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": {
          "x": -50,
          "y": -15,
          "z": 0
        }
      }
    },
    "3": {
      "id": 3,
      "name": "left_leg",
      "op": {
        "type": "Cube",
        "size": {
          "x": 8,
          "y": 30,
          "z": 35
        }
      }
    },
    "4": {
      "id": 4,
      "name": "left_leg_t",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {
          "x": -50,
          "y": -15,
          "z": 8
        }
      }
    },
    "5": {
      "id": 5,
      "name": "base_plus_left",
      "op": {
        "type": "Union",
        "left": 2,
        "right": 4
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 2,
      "material": "default"
    },
    {
      "root": 4,
      "material": "default"
    },
    {
      "root": 5,
      "material": "default"
    }
  ]
}

generated 2026-06-19T01:47:56.246Z · static site, regenerate with npm run build -w @mecheval/leaderboard