{
  "meta": {
    "version": "2.0",
    "study_name": "support_mass_v1",
    "description": "Minimize mass of structural support",
    "created_by": "claude",
    "created_at": "2026-01-18",
    "modified_by": "claude",
    "modified_at": "2026-01-18"
  },
  "model": {
    "sim": {
      "path": "",
      "solver": "nastran",
      "description": "Structural support model - to be configured in Canvas"
    }
  },
  "design_variables": [],
  "extractors": [
    {
      "id": "ext_001",
      "name": "mass",
      "type": "mass_bdf",
      "description": "Total structural mass from BDF",
      "config": {
        "unit": "kg"
      },
      "enabled": true,
      "canvas_position": {
        "x": 400,
        "y": 200
      }
    }
  ],
  "objectives": [
    {
      "id": "obj_001",
      "name": "minimize_mass",
      "direction": "minimize",
      "weight": 1.0,
      "extractor_id": "ext_001",
      "enabled": true,
      "canvas_position": {
        "x": 600,
        "y": 200
      }
    }
  ],
  "constraints": [],
  "optimization": {
    "algorithm": {
      "type": "TPE",
      "config": {
        "n_startup_trials": 10,
        "multivariate": true
      }
    },
    "budget": {
      "max_trials": 100,
      "timeout_hours": null
    },
    "convergence": {
      "enable_early_stopping": true,
      "patience": 15,
      "min_improvement": 0.001
    }
  },
  "canvas": {
    "edges": [
      {
        "id": "edge_001",
        "source": "model",
        "target": "ext_001"
      },
      {
        "id": "edge_002",
        "source": "ext_001",
        "target": "obj_001"
      }
    ],
    "layout_version": "2.0"
  }
}