{
  "boundary_cases": {
    "invalid": {
      "description": "Negative distance resulting in geometric collapse and non-manifold surfaces.",
      "unit": "mm",
      "value": -10.0
    },
    "maximum": {
      "description": "Upper limit before structural instability or material failure risks arise.",
      "unit": "mm",
      "value": 200.0
    },
    "minimum": {
      "description": "Minimum extrusion distance ensuring a closed volume exists.",
      "unit": "mm",
      "value": 1.0
    },
    "nominal": {
      "description": "Standard design length for typical household shelving units.",
      "unit": "mm",
      "value": 50.0
    }
  },
  "limitations": [
    "Output geometry cannot be physically manufactured without external CAD software integration.",
    "No commercial rights or release authority exists for the generated design data."
  ],
  "provenance_review": {
    "commercial_use": "blocked",
    "decision": "quarantine",
    "licence_status": "unknown",
    "reason": "Source material lacks verifiable licensing history, preventing any commercial deployment or public release of generated designs."
  },
  "round": 3,
  "safety_gate": {
    "action": "continue",
    "forge_execution_allowed": false,
    "reason": "Design remains theoretical and safe for conceptual study only; no physical execution tools are permitted due to unknown provenance.",
    "risk_class": "low"
  },
  "transfer_project": {
    "acceptance_criteria": [
      "The output solid must have exactly zero non-manifold edges and no self-intersecting faces.",
      "All face normals must be consistently outward-facing relative to the defined coordinate system."
    ],
    "goal": "Apply extrusion logic to create a valid solid for a bookshelf design using harmless household materials.",
    "inputs": [
      {
        "name": "base_profile",
        "type": "vector_2d"
      },
      {
        "name": "extrusion_distance",
        "type": "scalar"
      }
    ],
    "outputs": [
      {
        "name": "shelf_geometry",
        "type": "solid_mesh"
      },
      {
        "name": "validity_check",
        "type": "boolean_flag"
      }
    ],
    "steps": [
      "Define the base profile with explicit origin, axes, and units in millimeters.",
      "Extrude the constrained geometry along a specified axis to form a closed solid.",
      "Validate that all faces are manifold and normals point outward without self-intersection."
    ],
    "title": "Household Shelf Extrusion Transfer"
  }
}