run 20260428T213811Z-dfa6

Summary

Prompt

Design a tabletop manipulator that touches a target at (0.20, 0.00, 0.10) meters in the world frame. The base is fixed at the origin, with its lowest contact in the XY plane (z = 0). Use at least two actuated revolute joints. Each link's mass must be under 0.5 kg, and each joint's torque ceiling is 5 N·m. The end-effector link must be tagged 'tip'. The arm must reach the target without any link colliding with the table (z = 0 plane), the base, or itself. Output a complete .vcad assembly with body, joints, materials, and an initial pose; the grader will solve forward kinematics to find a configuration that reaches the target.

Checks

params: {
  "type": "valid_solid"
}

details: {
  "error": "parse: Invalid JSON vcad file: invalid value: expected key to be a number in quotes at line 4 column 5",
  "reason": "fatal evaluation error"
}

params: {
  "type": "body_valid"
}

details: {
  "needs": "vcad-gym (phyz + tang)",
  "reason": "skeleton — kernel wiring pending"
}

params: {
  "type": "fk_reaches",
  "target": [
    0.2,
    0,
    0.1
  ],
  "tolerance_m": 0.005
}

details: {
  "needs": "vcad-gym (phyz + tang)",
  "reason": "skeleton — kernel wiring pending"
}

params: {
  "type": "torque_budget",
  "payload_kg": 0,
  "safety_factor": 1.5
}

details: {
  "needs": "vcad-gym (phyz + tang)",
  "reason": "skeleton — kernel wiring pending"
}

params: {
  "type": "task_success",
  "task": "reach_target",
  "params": {
    "controller": "stock_pd",
    "max_steps": 1000,
    "target": [
      0.2,
      0,
      0.1
    ],
    "tolerance_m": 0.005
  }
}

details: {
  "needs": "vcad-gym (phyz + tang)",
  "reason": "skeleton — kernel wiring pending"
}

Tool calls

{
  "model": "gpt-4o-mini",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 694
}

What the model built

.vcad source

{
  "version": "0.1",
  "nodes": {
    "base": {
      "id": "base",
      "name": "Base",
      "op": {
        "type": "Cube",
        "size": {
          "x": 100,
          "y": 100,
          "z": 10
        }
      }
    },
    "link1": {
      "id": "link1",
      "name": "Link 1",
      "op": {
        "type": "Cube",
        "size": {
          "x": 10,
          "y": 10,
          "z": 200
        }
      }
    },
    "joint1": {
      "id": "joint1",
      "name": "Joint 1",
      "op": {
        "type": "Translate",
        "child": "link1",
        "offset": {
          "x": 0,
          "y": 0,
          "z": 10
        }
      }
    },
    "link2": {
      "id": "link2",
      "name": "Link 2",
      "op": {
        "type": "Cube",
        "size": {
          "x": 10,
          "y": 10,
          "z": 200
        }
      }
    },
    "joint2": {
      "id": "joint2",
      "name": "Joint 2",
      "op": {
        "type": "Translate",
        "child": "link2",
        "offset": {
          "x": 0,
          "y": 0,
          "z": 200
        }
      }
    },
    "end_effector": {
      "id": "end_effector",
      "name": "End Effector",
      "op": {
        "type": "Cylinder",
        "radius": 5,
        "height": 10,
        "segments": 32
      }
    },
    "end_effector_translated": {
      "id": "end_effector_translated",
      "name": "End Effector Translated",
      "op": {
        "type": "Translate",
        "child": "end_effector",
        "offset": {
          "x": 0,
          "y": 0,
          "z": 200
        }
      }
    },
    "arm_group": {
      "id": "arm_group",
      "name": "Arm Group",
      "op": {
        "type": "Union",
        "left": "joint1",
        "right": "joint2"
      }
    },
    "final_group": {
      "id": "final_group",
      "name": "Final Assembly",
      "op": {
        "type": "Union",
        "left": "arm_group",
        "right": "end_effector_translated"
      }
    }
  },
  "materials": {},
  "part_materials": {
    "base": "default",
    "link1": "default",
    "link2": "default",
    "end_effector": "default"
  },
  "roots": [{
    "root": "final_group",
    "material": "default"
  }]
}

generated 2026-06-19T01:47:56.305Z · static site, regenerate with npm run build -w @mecheval/leaderboard