{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T06:44:35Z",
    "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": 1,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T16:30:00Z",
      "ingestedAt": "2026-10-05T13:22:52+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:36:48+00:00",
        "engine": "codex",
        "fields": [
          "agent_conduct",
          "definition",
          "distinguishing_features",
          "purpose",
          "visual_identification"
        ],
        "answering_review": "1084a92d65d11414785b21d6890dd88fe74473a04448673d2f93d052af018eee"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:26+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q164",
    "registryId": "vr.tr.square",
    "name": "square",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.QTY"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q164/",
  "model": {
    "registry_id": "vr.tr.square",
    "name": "square",
    "purpose": "Let an agent explain the square as a geometric figure, including its properties, formulas and uses.",
    "definition": "A plane figure with four equal sides and four right angles.",
    "what_it_is_for": "Geometry, measurement, design and arithmetic.",
    "affordances": [
      "compute area and diagonal",
      "construct and draw it",
      "square a number",
      "use it in grids and tilings"
    ],
    "distinguishing_features": [
      "A square is a regular quadrilateral.",
      "A square is a special case of both a rectangle and a rhombus.",
      "Squares can tile the plane."
    ],
    "appearance": "A four-sided shape with equal sides and right angles.",
    "visual_identification": [
      "A square has four equal sides and four right angles.",
      "Other senses such as arithmetic squaring, Punnett squares or chess outposts are separate."
    ],
    "physical_properties": [
      {
        "quantity": "area",
        "typical_range": "side squared",
        "unit": "square units",
        "note": ""
      },
      {
        "quantity": "diagonal",
        "typical_range": "side times sqrt(2)",
        "unit": "length",
        "note": ""
      }
    ],
    "families_and_kinds": [
      "geometric square",
      "square numbers",
      "unit square",
      "magic squares and Latin squares (related)"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "rectangle",
        "why": "quadrilateral"
      },
      {
        "relation": "is related to",
        "target": "cube",
        "why": "three dimensions"
      },
      {
        "relation": "is used in",
        "target": "polygonal number",
        "why": "square numbers"
      },
      {
        "relation": "is confused with",
        "target": "town square",
        "why": "public space"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "ISO 80000-2 notation"
    ],
    "failure_modes_and_hazards": [
      "Confusing square units with linear units",
      "Confusing senses"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Compute geometric properties of squares accurately.",
        "Explain the geometry of the square."
      ],
      "must_not": [
        "State an incorrect result as established.",
        "Present an approximate drawing or measurement as an exact square in a survey or plan."
      ],
      "requires_human": [
        "A human must decide whether to rely on a computed area for a legal or financial decision such as a land sale."
      ]
    },
    "ethics": {
      "considerations": [
        "Mathematical results should be accurate and properly credited.",
        "Errors in area calculations can cost people money or land."
      ],
      "affected_parties": [
        "Students and teachers",
        "People relying on calculations"
      ]
    },
    "owners": {
      "steward": "Nobody: a mathematical concept held in common.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q164: square",
      "url": "https://www.wikidata.org/wiki/Q164",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Square",
      "url": "https://en.wikipedia.org/wiki/Square",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "geometry",
        "name": "Geometry",
        "description": "Properties.",
        "rationale": "Properties define the square.",
        "layers": [
          {
            "id": "properties",
            "name": "Properties",
            "description": "Sides and angles.",
            "findings": [
              {
                "id": "properties-finding",
                "name": "Properties",
                "description": "Geometric properties.",
                "questions": [
                  {
                    "text": "What are its side length, area and diagonal?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Does it meet the definition?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "construction",
            "name": "Construction",
            "description": "Drawing.",
            "findings": [
              {
                "id": "construction-finding",
                "name": "Construction",
                "description": "Construction.",
                "questions": [
                  {
                    "text": "How can it be constructed exactly?",
                    "kind": "action"
                  },
                  {
                    "text": "With which tools?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "arithmetic",
        "name": "Arithmetic",
        "description": "Squaring.",
        "rationale": "The arithmetic sense.",
        "layers": [
          {
            "id": "operation",
            "name": "Operation",
            "description": "x squared.",
            "findings": [
              {
                "id": "operation-finding",
                "name": "Operation",
                "description": "Squaring.",
                "questions": [
                  {
                    "text": "What is the square of this number?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Is it a perfect square?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "roots",
            "name": "Roots",
            "description": "Square roots.",
            "findings": [
              {
                "id": "roots-finding",
                "name": "Roots",
                "description": "Square roots.",
                "questions": [
                  {
                    "text": "What is its square root?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Is it rational?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Applications.",
        "rationale": "Squares appear in design and measurement.",
        "layers": [
          {
            "id": "area",
            "name": "Area units",
            "description": "Square metres.",
            "findings": [
              {
                "id": "area-finding",
                "name": "Area",
                "description": "Area units.",
                "questions": [
                  {
                    "text": "How are square units used in area?",
                    "kind": "definition"
                  },
                  {
                    "text": "Are units consistent?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "tiling",
            "name": "Tiling",
            "description": "Grids.",
            "findings": [
              {
                "id": "tiling-finding",
                "name": "Tiling",
                "description": "Tiling.",
                "questions": [
                  {
                    "text": "How do squares tile surfaces?",
                    "kind": "definition"
                  },
                  {
                    "text": "How many are needed?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "senses",
        "name": "Senses",
        "description": "Disambiguation.",
        "rationale": "Many things are called square.",
        "layers": [
          {
            "id": "other",
            "name": "Other senses",
            "description": "Town square, Punnett square.",
            "findings": [
              {
                "id": "other-finding",
                "name": "Senses",
                "description": "Other senses.",
                "questions": [
                  {
                    "text": "Which sense of square is meant?",
                    "kind": "boundary"
                  },
                  {
                    "text": "Is there a better entry?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "teaching",
            "name": "Teaching",
            "description": "Explaining.",
            "findings": [
              {
                "id": "teaching-finding",
                "name": "Teaching",
                "description": "Teaching.",
                "questions": [
                  {
                    "text": "How can squares be taught clearly?",
                    "kind": "action"
                  },
                  {
                    "text": "What misconceptions are common?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should square numbers be a separate entry?",
    "How should the town square sense be split off?",
    "How should related squares (Punnett, magic) be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}
