{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T04:49:08Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 3,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:05:53+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:56:37+00:00",
        "engine": "codex",
        "fields": [
          "definition"
        ],
        "answering_review": "3d89ccc730452404aa8d04c10ec3d3f17f29a3221a1731ba739eecfc980681cc"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:32+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q660",
    "registryId": "vr.tr.magnesium",
    "name": "magnesium",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q660/",
  "model": {
    "registry_id": "vr.tr.magnesium",
    "name": "magnesium",
    "purpose": "Let an agent explain magnesium as an element and its properties, relay isotopes, occurrence and production from chemistry references, describe alloys, biological roles and hazards, and distinguish magnesium from manganese and from magnesium compounds and supplements.",
    "definition": "A chemical element with symbol Mg and atomic number 12, a light, silvery alkaline earth metal that burns with a brilliant white flame, is the eighth most abundant element in the crust, is essential to chlorophyll and hundreds of enzymes, is used in lightweight alloys for vehicles and electronics, in reducing agents and flares, and is known in isotopes from magnesium-19 through magnesium-40, of which magnesium-24, 25 and 26 are stable.",
    "what_it_is_for": "Alloys, reducing agent, biological nutrient.",
    "affordances": [
      "explain properties",
      "relay isotopes and occurrence",
      "describe uses and biology",
      "distinguish from manganese"
    ],
    "distinguishing_features": [
      "Lightest structural metal",
      "Bright combustion",
      "Biological essential",
      "Three stable isotopes"
    ],
    "appearance": "A shiny grey metal that burns bright white.",
    "visual_identification": [
      "Light silvery alkaline earth metal",
      "Magnesium metal, alloys, isotopes magnesium-24 to 26 stable and radioactive isotopes",
      "Manganese is a different transition metal; magnesium oxide and sulfate are compounds"
    ],
    "physical_properties": [
      {
        "quantity": "atomic number",
        "typical_range": "12",
        "unit": "Z",
        "note": ""
      },
      {
        "quantity": "standard atomic weight",
        "typical_range": "24.305",
        "unit": "u",
        "note": ""
      },
      {
        "quantity": "density",
        "typical_range": "1.738",
        "unit": "g/cm^3",
        "note": ""
      },
      {
        "quantity": "melting point",
        "typical_range": "650",
        "unit": "C",
        "note": ""
      },
      {
        "quantity": "stable isotopes",
        "typical_range": "24, 25, 26",
        "unit": "mass numbers",
        "note": ""
      }
    ],
    "families_and_kinds": [
      "magnesium metal and alloys",
      "stable isotopes magnesium-24, 25 and 26",
      "radioactive isotopes from magnesium-18 and 19 to magnesium-40",
      "magnesium compounds such as oxide, chloride and sulfate",
      "magnesium in biology and nutrition"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "alkaline earth metal",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "light metal",
        "why": "in registry terms"
      },
      {
        "relation": "is central to",
        "target": "chlorophyll",
        "why": "in plants"
      },
      {
        "relation": "is contrasted with",
        "target": "manganese",
        "why": "often confused"
      }
    ],
    "identifiers": [
      {
        "scheme": "CAS",
        "value_or_pattern": "7439-95-4",
        "note": "magnesium"
      },
      {
        "scheme": "symbol",
        "value_or_pattern": "Mg",
        "note": "element"
      }
    ],
    "standards_and_regulation": [
      "Fire safety rules for magnesium metal and powder",
      "Dietary reference intakes for magnesium",
      "Alloy standards such as ASTM B93"
    ],
    "failure_modes_and_hazards": [
      "Magnesium fires that water cannot extinguish",
      "Confusing magnesium with manganese",
      "Agents giving personal supplement advice"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Give properties, uses and dietary roles of magnesium from cited sources.",
        "Advise lawful storage and handling of magnesium metal following its safety data sheet."
      ],
      "must_not": [
        "Assist in making incendiary or pyrotechnic devices from magnesium.",
        "Advise putting out a magnesium fire with water or ordinary extinguishers.",
        "Recommend magnesium supplement doses to a person, especially with kidney disease, without a clinician.",
        "Store or machine fine magnesium powder or swarf near ignition sources."
      ],
      "requires_human": [
        "Approving fire response plans for sites that store or machine magnesium."
      ]
    },
    "ethics": {
      "considerations": [
        "Burning magnesium is very hard to extinguish and can injure firefighters.",
        "Supplements are widely sold with health claims that outrun the evidence."
      ],
      "affected_parties": [
        "Workers in metal shops",
        "Firefighters",
        "Supplement users"
      ]
    },
    "owners": {
      "steward": "Nobody owns the element; holders of the metal answer for its storage under fire and chemical rules.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q660: magnesium",
      "url": "https://www.wikidata.org/wiki/Q660",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Magnesium",
      "url": "https://en.wikipedia.org/wiki/Magnesium",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What magnesium is.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "properties",
            "name": "Properties",
            "description": "Properties.",
            "findings": [
              {
                "id": "properties-finding",
                "name": "Properties",
                "description": "Properties.",
                "questions": [
                  {
                    "text": "What are the physical and chemical properties of magnesium?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the element, a compound, a supplement or manganese?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "isotopes",
            "name": "Isotopes",
            "description": "Isotopes.",
            "findings": [
              {
                "id": "isotopes-finding",
                "name": "Isotopes",
                "description": "Isotopes.",
                "questions": [
                  {
                    "text": "What isotopes of magnesium exist, and what are their half-lives and uses?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Which entry fits the specific isotope?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Uses.",
        "rationale": "Application.",
        "layers": [
          {
            "id": "alloys",
            "name": "Alloys",
            "description": "Alloys and metal.",
            "findings": [
              {
                "id": "alloys-finding",
                "name": "Alloys",
                "description": "Alloys.",
                "questions": [
                  {
                    "text": "How is magnesium used in alloys, reducing agents, flares and electronics?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "biology",
            "name": "Biology",
            "description": "Biology and nutrition.",
            "findings": [
              {
                "id": "biology-finding",
                "name": "Biology",
                "description": "Biology.",
                "questions": [
                  {
                    "text": "What roles does magnesium play in enzymes, chlorophyll and human nutrition, in general terms?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the user asking about their own supplementation, which needs a clinician?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "produce",
        "name": "Produce",
        "description": "Occurrence and production.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "occurrence",
            "name": "Occurrence",
            "description": "Occurrence.",
            "findings": [
              {
                "id": "occurrence-finding",
                "name": "Occurrence",
                "description": "Occurrence.",
                "questions": [
                  {
                    "text": "Where does magnesium occur, from seawater to dolomite and magnesite?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "production",
            "name": "Production",
            "description": "Production.",
            "findings": [
              {
                "id": "production-finding",
                "name": "Production",
                "description": "Production.",
                "questions": [
                  {
                    "text": "How is magnesium produced by electrolysis and the Pidgeon process, and who produces it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the Pidgeon process?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Safety and history.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "safety",
            "name": "Safety",
            "description": "Safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "What are the fire hazards of magnesium, and how are magnesium fires handled?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits metal fire?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How was magnesium discovered and isolated by Davy, and how did its uses develop?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of chemistry?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should isotopes of magnesium be a separate entry?",
    "How should chemistry references be linked?",
    "The registry entry has merged aliases naming individual isotopes; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}