{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T02:04:23Z",
    "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": "2026-10-06T07:06:04+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:52:01+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q703",
    "registryId": "vr.tr.potassium",
    "name": "potassium",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q703/",
  "model": {
    "registry_id": "vr.tr.potassium",
    "name": "potassium",
    "purpose": "Let an agent identify potassium and its properties, relay isotopes, compounds, production and uses from reference sources, describe biological and dietary roles in general terms, and distinguish the element from potash and its salts.",
    "definition": "A chemical element with symbol K and atomic number 19, a soft, silvery alkali metal that reacts violently with water, occurring in minerals such as sylvite and in seawater, essential to all living cells as the main intracellular cation and to plants as a major nutrient supplied by potash fertilisers, and used in compounds for glass, soap and chemicals; potassium has two stable isotopes and the long-lived radioactive potassium-40 used in dating, with many short-lived isotopes from potassium-32 upward, and dietary potassium is important for blood pressure.",
    "what_it_is_for": "Fertilisers, chemicals and biological function.",
    "affordances": [
      "relay properties and isotopes",
      "explain compounds and uses",
      "relay biological and dietary roles",
      "distinguish from potash"
    ],
    "distinguishing_features": [
      "Highly reactive",
      "Main intracellular cation",
      "Fertiliser nutrient",
      "Potassium-40 dating"
    ],
    "appearance": "A soft silvery metal that tarnishes rapidly and burns with a lilac flame.",
    "visual_identification": [
      "Element 19, symbol K",
      "Alkali metal of potash and cell potassium",
      "Potash is a group of potassium salts; sodium is the neighbouring alkali metal"
    ],
    "physical_properties": [
      {
        "quantity": "atomic number",
        "typical_range": "19",
        "unit": "Z",
        "note": ""
      },
      {
        "quantity": "standard atomic weight",
        "typical_range": "39.098",
        "unit": "u",
        "note": ""
      },
      {
        "quantity": "melting point",
        "typical_range": "63.5",
        "unit": "degrees C",
        "note": ""
      },
      {
        "quantity": "potassium-40 half-life",
        "typical_range": "1.25 billion",
        "unit": "years",
        "note": ""
      }
    ],
    "families_and_kinds": [
      "potassium metal",
      "potassium compounds such as chloride, hydroxide, nitrate and carbonate",
      "stable potassium-39 and potassium-41, radioactive potassium-40 and short-lived isotopes such as potassium-32 to potassium-37",
      "potash fertilisers",
      "dietary potassium"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "alkali metal",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "s-block",
        "why": "element in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "light metal",
        "why": "in registry terms"
      },
      {
        "relation": "is essential for",
        "target": "cell",
        "why": "as the main intracellular cation"
      }
    ],
    "identifiers": [
      {
        "scheme": "symbol",
        "value_or_pattern": "K",
        "note": ""
      },
      {
        "scheme": "CAS",
        "value_or_pattern": "7440-09-7",
        "note": ""
      }
    ],
    "standards_and_regulation": [
      "Chemical safety rules for reactive metals",
      "Fertiliser regulations",
      "Dietary guidelines on potassium intake",
      "Radiation rules for potassium-40 in food are minimal"
    ],
    "failure_modes_and_hazards": [
      "Fire and explosion with water",
      "Hyperkalaemia and hypokalaemia",
      "Confusing potassium with potash",
      "Agents giving personal dietary or medical advice"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Describe potassium's properties, occurrence and role in living cells from sources.",
        "Explain dietary potassium and its sources in general terms."
      ],
      "must_not": [
        "Assist anyone in using potassium or its compounds to harm people.",
        "Handle or store metallic potassium outside a properly equipped laboratory setting.",
        "Advise a person to take potassium supplements or salts without medical guidance.",
        "Release metallic potassium into water, drains or waste."
      ],
      "requires_human": [
        "Any handling or disposal of metallic potassium.",
        "Advice on potassium intake for people with kidney or heart conditions."
      ]
    },
    "ethics": {
      "considerations": [
        "Metallic potassium is a fire and injury risk; its handling belongs to trained people.",
        "Too much or too little potassium in the blood can stop the heart."
      ],
      "affected_parties": [
        "Laboratory workers",
        "Patients with kidney or heart disease",
        "Waste handlers"
      ]
    },
    "owners": {
      "steward": "The laboratory or company that holds it, under chemical safety rules.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q703: potassium",
      "url": "https://www.wikidata.org/wiki/Q703",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Potassium",
      "url": "https://en.wikipedia.org/wiki/Potassium",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "identify",
        "name": "Identify",
        "description": "What potassium is.",
        "rationale": "Identity.",
        "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 potassium?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the element, potash or dietary potassium?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "isotopes",
            "name": "Isotopes",
            "description": "Isotopes.",
            "findings": [
              {
                "id": "isotopes-finding",
                "name": "Isotopes",
                "description": "Isotopes.",
                "questions": [
                  {
                    "text": "Which isotopes exist, and how is potassium-40 used in dating?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific isotope?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "produce",
        "name": "Produce",
        "description": "Compounds and production.",
        "rationale": "Industry.",
        "layers": [
          {
            "id": "compounds",
            "name": "Compounds",
            "description": "Compounds and potash.",
            "findings": [
              {
                "id": "compounds-finding",
                "name": "Compounds",
                "description": "Compounds.",
                "questions": [
                  {
                    "text": "What are the major potassium compounds, and how is potash mined and used?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits potash?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "metal",
            "name": "Metal",
            "description": "Potassium metal.",
            "findings": [
              {
                "id": "metal-finding",
                "name": "Metal",
                "description": "Metal.",
                "questions": [
                  {
                    "text": "How is potassium metal produced, and where is it used?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "life",
        "name": "Life",
        "description": "Biology and diet.",
        "rationale": "Public health.",
        "layers": [
          {
            "id": "biology",
            "name": "Biology",
            "description": "Potassium in cells.",
            "findings": [
              {
                "id": "biology-finding",
                "name": "Biology",
                "description": "Biology.",
                "questions": [
                  {
                    "text": "What role does potassium play in cells, nerves and plants?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits potassium in biology?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "diet",
            "name": "Diet",
            "description": "Dietary potassium.",
            "findings": [
              {
                "id": "diet-finding",
                "name": "Diet",
                "description": "Diet.",
                "questions": [
                  {
                    "text": "What do guidelines say about potassium intake and blood pressure, in general terms?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the user asking for personal dietary or medical advice, which needs a professional?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "History and safety.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "discovery",
            "name": "Discovery",
            "description": "Discovery.",
            "findings": [
              {
                "id": "discovery-finding",
                "name": "Discovery",
                "description": "Discovery.",
                "questions": [
                  {
                    "text": "How was potassium isolated by Davy in 1807, and why is it called kalium in many languages?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of chemistry?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "How is potassium metal handled safely?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should potash and dietary potassium be separate primary entries?",
    "How should health guidelines be linked?",
    "The registry entry has merged aliases naming short-lived isotopes; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}