{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T23:27:52Z",
    "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": "2026-10-06T06:57:11+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T23:00:57+00:00",
        "engine": "codex",
        "fields": [
          "definition",
          "distinguishing_features"
        ],
        "answering_review": "6bc6ba7b6f2c1e98aa0c2f9ffce8ffd01902815494d54bc77e2a8ea826a63b16"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:33+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q888",
    "registryId": "vr.tr.krypton",
    "name": "krypton",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q888/",
  "model": {
    "registry_id": "vr.tr.krypton",
    "name": "krypton",
    "purpose": "Let an agent identify krypton and its properties, relay isotopes, production and uses from reference sources, explain its historical role in defining the metre, and distinguish it from other noble gases.",
    "definition": "A chemical element with symbol Kr and atomic number 36, a colourless, odourless noble gas present in trace amounts in the atmosphere, obtained by fractional distillation of liquid air; krypton is used in lighting, lasers, insulating windows and, through the isotope krypton-85, in leak detection and as a tracer, its spectral line once defined the metre, and its naturally occurring isotopes include five stable isotopes and the extremely long-lived radioactive isotope krypton-78.",
    "what_it_is_for": "Lighting, lasers, insulation and tracers.",
    "affordances": [
      "relay properties and isotopes",
      "explain production and uses",
      "explain the metre definition history",
      "distinguish from other noble gases"
    ],
    "distinguishing_features": [
      "Krypton is a noble gas.",
      "Naturally occurring krypton includes five stable isotopes and the extremely long-lived radioactive isotope krypton-78.",
      "Krypton-85 is produced by nuclear fission.",
      "A krypton spectral line formerly defined the metre."
    ],
    "appearance": "A colourless gas that glows whitish in a discharge tube.",
    "visual_identification": [
      "Element 36, symbol Kr",
      "Noble gas, trace in air",
      "Argon and xenon are the neighbouring noble gases; the fictional kryptonite is unrelated"
    ],
    "physical_properties": [
      {
        "quantity": "atomic number",
        "typical_range": "36",
        "unit": "Z",
        "note": ""
      },
      {
        "quantity": "standard atomic weight",
        "typical_range": "83.798",
        "unit": "u",
        "note": ""
      },
      {
        "quantity": "boiling point",
        "typical_range": "-153.4",
        "unit": "degrees C",
        "note": ""
      },
      {
        "quantity": "atmospheric abundance",
        "typical_range": "about 1.1",
        "unit": "ppm",
        "note": "by volume"
      }
    ],
    "families_and_kinds": [
      "krypton gas",
      "isotopes from krypton-69 to krypton-101, with six stable and Kr-85 radioactive",
      "krypton compounds such as krypton difluoride, few and unstable",
      "krypton in lamps and lasers"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "noble gas",
        "why": "in registry terms"
      },
      {
        "relation": "is adjacent to",
        "target": "bromine",
        "why": "element 35"
      },
      {
        "relation": "is adjacent to",
        "target": "rubidium",
        "why": "element 37"
      },
      {
        "relation": "defined",
        "target": "metre",
        "why": "from 1960 to 1983"
      }
    ],
    "identifiers": [
      {
        "scheme": "symbol",
        "value_or_pattern": "Kr",
        "note": ""
      },
      {
        "scheme": "CAS",
        "value_or_pattern": "7439-90-9",
        "note": ""
      }
    ],
    "standards_and_regulation": [
      "Compressed gas safety standards",
      "Radiation rules for krypton-85 sources",
      "Monitoring of Kr-85 as a nuclear activity indicator"
    ],
    "failure_modes_and_hazards": [
      "Asphyxiation in confined spaces",
      "Radiation from Kr-85",
      "Confusion with fiction"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Explain krypton's properties as a noble gas and its uses in lighting, insulated glazing and lasers.",
        "Describe krypton-85 as a fission product and its use in monitoring nuclear activity.",
        "Clarify the difference between the element and the fictional planet or mineral named kryptonite."
      ],
      "must_not": [
        "Advise entering confined spaces where krypton or other inert gases may have displaced the air.",
        "Present krypton as harmless to breathe because it is non-toxic.",
        "Give guidance on handling sealed krypton-85 sources outside licensed use.",
        "Mix fictional properties of kryptonite into factual statements about the element."
      ],
      "requires_human": [
        "Entry into a tank, room or vessel where inert gas may have accumulated."
      ]
    },
    "ethics": {
      "considerations": [
        "Inert gases suffocate without warning, and confined space deaths often include rescuers.",
        "Honest science communication matters when popular fiction overshadows the real element."
      ],
      "affected_parties": [
        "Workers in gas handling and glazing plants",
        "Rescuers entering confined spaces",
        "Students and readers"
      ]
    },
    "owners": {
      "steward": "Nobody owns the element; gas suppliers and licensed holders of radioactive sources answer for their stock.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q888: krypton",
      "url": "https://www.wikidata.org/wiki/Q888",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Krypton",
      "url": "https://en.wikipedia.org/wiki/Krypton",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "identify",
        "name": "Identify",
        "description": "What krypton 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 krypton?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about krypton or a neighbouring noble gas?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "isotopes",
            "name": "Isotopes",
            "description": "Isotopes.",
            "findings": [
              {
                "id": "isotopes-finding",
                "name": "Isotopes",
                "description": "Isotopes.",
                "questions": [
                  {
                    "text": "Which isotopes exist, and how is krypton-85 used and monitored?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific isotope?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "source",
        "name": "Source",
        "description": "Occurrence and production.",
        "rationale": "Supply.",
        "layers": [
          {
            "id": "occurrence",
            "name": "Occurrence",
            "description": "Occurrence.",
            "findings": [
              {
                "id": "occurrence-finding",
                "name": "Occurrence",
                "description": "Occurrence.",
                "questions": [
                  {
                    "text": "Where does krypton occur, and how is it extracted from air?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits air separation?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "supply",
            "name": "Supply",
            "description": "Supply.",
            "findings": [
              {
                "id": "supply-finding",
                "name": "Supply",
                "description": "Supply.",
                "questions": [
                  {
                    "text": "Who produces krypton, and how is it traded, with sources?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Uses and safety.",
        "rationale": "Application.",
        "layers": [
          {
            "id": "uses",
            "name": "Uses",
            "description": "Uses.",
            "findings": [
              {
                "id": "uses-finding",
                "name": "Uses",
                "description": "Uses.",
                "questions": [
                  {
                    "text": "How is krypton used in lighting, lasers, windows and leak detection?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits gas discharge lamp?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "What hazards does krypton present, and how is Kr-85 regulated?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the user asking about a personal exposure, which needs a specialist?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "History.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "discovery",
            "name": "Discovery",
            "description": "Discovery.",
            "findings": [
              {
                "id": "discovery-finding",
                "name": "Discovery",
                "description": "Discovery.",
                "questions": [
                  {
                    "text": "How was krypton discovered by Ramsay and Travers in 1898, and how was it named?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "metre",
            "name": "Metre",
            "description": "The metre definition.",
            "findings": [
              {
                "id": "metre-finding",
                "name": "Metre",
                "description": "Metre.",
                "questions": [
                  {
                    "text": "How did a krypton-86 spectral line define the metre from 1960 to 1983?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of the metre?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should krypton-85 be a separate entry?",
    "How should reference data be linked?",
    "The registry entry has merged aliases naming isotopes; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}