{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T05:29:44Z",
    "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": "2026-10-06T07:08:05+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:51:54+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q1395768",
    "registryId": "vr.tr.nissen-hut",
    "name": "Nissen hut",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q1395768/",
  "model": {
    "registry_id": "vr.tr.nissen-hut",
    "name": "Nissen hut",
    "purpose": "Let an agent explain the Nissen hut and its design, relay history, variants and surviving examples from heritage and military history sources, describe its civilian uses, and distinguish the Nissen hut from the Quonset hut, Romney hut and other prefabricated shelters.",
    "definition": "A prefabricated steel structure with a semicircular cross-section made of corrugated iron sheets bolted to curved ribs, designed in 1916 by the Canadian engineer Peter Nissen for the British Army as a cheap, quickly erected shelter for troops, stores and workshops, produced in great numbers in both world wars and afterwards adapted for farms, housing and industry; the Nissen hut inspired the American Quonset hut and many survive as heritage structures.",
    "what_it_is_for": "Quick prefabricated shelter.",
    "affordances": [
      "explain design",
      "relay history and variants",
      "describe civilian uses",
      "distinguish related huts"
    ],
    "distinguishing_features": [
      "Semicircular section",
      "Corrugated iron on ribs",
      "Rapid erection",
      "Wartime ubiquity"
    ],
    "appearance": "A half-cylinder of corrugated iron with flat end walls, doors and small windows.",
    "visual_identification": [
      "Semicircular corrugated iron hut",
      "Nissen huts of 16, 24 and 30 foot spans",
      "The Quonset hut is the American derivative; the Romney hut is larger; Anderson shelters are small garden shelters"
    ],
    "physical_properties": [
      {
        "quantity": "designed",
        "typical_range": "1916",
        "unit": "year",
        "note": "Peter Nissen"
      },
      {
        "quantity": "standard spans",
        "typical_range": "16, 24, 30",
        "unit": "feet",
        "note": ""
      },
      {
        "quantity": "First World War production",
        "typical_range": "about 100000",
        "unit": "count",
        "note": "estimates"
      },
      {
        "quantity": "erection time",
        "typical_range": "a few hours",
        "unit": "note",
        "note": "by a small team"
      }
    ],
    "families_and_kinds": [
      "First World War Nissen huts",
      "Second World War variants",
      "Nissen huts adapted as churches, homes and farm buildings",
      "derivatives such as the Quonset and Romney huts",
      "surviving heritage-listed huts"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "shed",
        "why": "in registry terms"
      },
      {
        "relation": "was designed by",
        "target": "Peter Norman Nissen",
        "why": "in 1916"
      },
      {
        "relation": "inspired",
        "target": "Quonset hut",
        "why": "in the United States"
      },
      {
        "relation": "was used by",
        "target": "British Army",
        "why": "in both world wars"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Heritage listing for surviving huts in the UK and elsewhere",
      "Building regulations for reuse"
    ],
    "failure_modes_and_hazards": [
      "Corrosion and condensation",
      "Confusing Nissen and Quonset huts",
      "Loss of surviving examples"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Describe the Nissen hut's design and history, citing military and architectural sources.",
        "Report the condition of a hut, such as corrosion or loose sheets, to its owner."
      ],
      "must_not": [
        "Let people shelter or work in a hut with corroded or unstable sheets or ribs.",
        "Disturb old linings or coatings that may contain asbestos.",
        "Damage or demolish a surviving hut that is protected as heritage."
      ],
      "requires_human": [
        "Demolishing, moving or converting a surviving historic hut."
      ]
    },
    "ethics": {
      "considerations": [
        "Surviving huts are wartime heritage and sometimes memorials.",
        "Old huts may contain hazardous materials that endanger users and workers."
      ],
      "affected_parties": [
        "Users of the hut",
        "Demolition workers",
        "Heritage communities"
      ]
    },
    "owners": {
      "steward": "The landowner or the person who keeps it.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q1395768: Nissen hut",
      "url": "https://www.wikidata.org/wiki/Q1395768",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Nissen hut",
      "url": "https://en.wikipedia.org/wiki/Nissen_hut",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What a Nissen hut is.",
        "rationale": "Definition.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition and design.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is a Nissen hut, how is it built, and how does it differ from Quonset and Romney huts?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the Nissen hut or a related prefabricated shelter?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "variants",
            "name": "Variants",
            "description": "Variants.",
            "findings": [
              {
                "id": "variants-finding",
                "name": "Variants",
                "description": "Variants.",
                "questions": [
                  {
                    "text": "What spans and variants were produced, and how were huts fitted out?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific variant?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "history",
        "name": "History",
        "description": "History.",
        "rationale": "Attribution.",
        "layers": [
          {
            "id": "origins",
            "name": "Origins",
            "description": "Origins.",
            "findings": [
              {
                "id": "origins-finding",
                "name": "Origins",
                "description": "Origins.",
                "questions": [
                  {
                    "text": "How did Peter Nissen design the hut in 1916, and how was it produced and used in the First World War, as historians describe?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "ww2",
            "name": "WW2",
            "description": "Second World War and after.",
            "findings": [
              {
                "id": "ww2-finding",
                "name": "WW2",
                "description": "WW2.",
                "questions": [
                  {
                    "text": "How were Nissen huts used in the Second World War and in post-war housing and industry?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "heritage",
        "name": "Heritage",
        "description": "Heritage.",
        "rationale": "Sources.",
        "layers": [
          {
            "id": "surviving",
            "name": "Surviving",
            "description": "Surviving huts.",
            "findings": [
              {
                "id": "surviving-finding",
                "name": "Surviving",
                "description": "Surviving.",
                "questions": [
                  {
                    "text": "Where do Nissen huts survive, and which are protected?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the specific site?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "conservation",
            "name": "Conservation",
            "description": "Conservation.",
            "findings": [
              {
                "id": "conservation-finding",
                "name": "Conservation",
                "description": "Conservation.",
                "questions": [
                  {
                    "text": "How are Nissen huts conserved and reused?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits military heritage?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Context.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "prefab",
            "name": "Prefab",
            "description": "Prefabrication.",
            "findings": [
              {
                "id": "prefab-finding",
                "name": "Prefab",
                "description": "Prefab.",
                "questions": [
                  {
                    "text": "How does the Nissen hut fit into the history of prefabricated buildings?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits prefabricated building?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "culture",
            "name": "Culture",
            "description": "Culture.",
            "findings": [
              {
                "id": "culture-finding",
                "name": "Culture",
                "description": "Culture.",
                "questions": [
                  {
                    "text": "How do Nissen huts appear in memoirs, film and popular memory?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits wartime architecture?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should the Quonset hut be linked as a separate entry?",
    "How should heritage sources be linked?",
    "How should surviving examples be recorded?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}