{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T09:42:29Z",
    "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": "2026-10-05T15:00:00Z",
      "ingestedAt": "2026-10-05T13:24:08+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "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-Q957798",
    "registryId": "vr.tr.megastructure",
    "name": "megastructure",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.SPC"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q957798/",
  "model": {
    "registry_id": "vr.tr.megastructure",
    "name": "megastructure",
    "purpose": "Let an agent handle megastructures by type, real or hypothetical status, scale and feasibility, clearly separating built works from speculation.",
    "definition": "An extremely large artificial structure; in engineering, record-scale constructions such as long fixed links and very large buildings, and in speculative science and fiction, hypothetical astronomical structures such as Dyson spheres, ringworlds and shellworlds.",
    "what_it_is_for": "Discussing very large engineering and speculative astroengineering.",
    "affordances": [
      "distinguish built megastructures from hypothetical ones",
      "compare scale and feasibility",
      "find sources for real projects",
      "discuss technosignature searches"
    ],
    "distinguishing_features": [
      "Extreme scale",
      "Mix of real and speculative",
      "Feasibility often unknown",
      "Popular in science fiction"
    ],
    "appearance": "Built examples: huge bridges, tunnels and dams; hypothetical ones exist only as concepts and art.",
    "visual_identification": [
      "Built versus hypothetical",
      "Concepts such as Dyson sphere or O Neill cylinder",
      "Megaprojects are a related planning term"
    ],
    "physical_properties": [
      {
        "quantity": "Maximum overall dimension",
        "unit": "m",
        "typical_range": "",
        "note": "Determine the greatest extent from surveys or design geometry and distinguish measured dimensions from hypothetical ones."
      },
      {
        "quantity": "Structural mass",
        "unit": "kg",
        "typical_range": "",
        "note": "Determine mass from material quantities and densities while stating which structural components are included."
      },
      {
        "quantity": "Occupied volume",
        "unit": "m3",
        "typical_range": "",
        "note": "Calculate volume from surveyed or proposed geometry using an explicit boundary convention."
      }
    ],
    "families_and_kinds": [
      "intercontinental and transoceanic fixed links",
      "very large buildings and dams",
      "Dyson spheres and swarms",
      "ringworlds and topopolises",
      "space habitats"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "artificial physical object",
        "why": "category"
      },
      {
        "relation": "includes",
        "target": "Dyson sphere",
        "why": "hypothetical"
      },
      {
        "relation": "is related to",
        "target": "megaproject",
        "why": "planning"
      },
      {
        "relation": "is searched for as",
        "target": "technosignature",
        "why": "astronomy"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Engineering codes for built structures",
      "Outer Space Treaty for space activities"
    ],
    "failure_modes_and_hazards": [
      "Presenting speculation as fact",
      "Claiming technosignature detections without confirmation"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Report the dimensions, cost and status of built record-scale structures from official sources.",
        "Clearly separate engineering fact from speculative or fictional megastructures."
      ],
      "must_not": [
        "Present a speculative or fictional megastructure as a real or planned project.",
        "Claim a technosignature detection that the astronomical community has not confirmed.",
        "Give structural design figures for a real project without a qualified engineer.",
        "Omit the displacement and environmental effects when describing a megaproject."
      ],
      "requires_human": [
        "Any engineering judgement used in the design or approval of a real structure."
      ]
    },
    "ethics": {
      "considerations": [
        "Megaprojects displace communities and reshape environments, which belongs in any honest account.",
        "Unconfirmed claims about alien megastructures erode trust in science reporting."
      ],
      "affected_parties": [
        "Communities displaced by megaprojects",
        "Construction workers",
        "Readers of science news"
      ]
    },
    "owners": {
      "steward": "The owner and the engineer of record for a built structure; nobody owns the speculative concept.",
      "master_systems": [
        "National infrastructure project records"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q957798: megastructure",
      "url": "https://www.wikidata.org/wiki/Q957798",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Megastructure",
      "url": "https://en.wikipedia.org/wiki/Megastructure",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "status",
        "name": "Status",
        "description": "Real or hypothetical.",
        "rationale": "Status must be clear.",
        "layers": [
          {
            "id": "built",
            "name": "Built",
            "description": "Real structures.",
            "findings": [
              {
                "id": "built-finding",
                "name": "Built",
                "description": "Built status.",
                "questions": [
                  {
                    "text": "Is this megastructure built, under construction or hypothetical?",
                    "kind": "boundary"
                  },
                  {
                    "text": "Which source confirms it?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "concept",
            "name": "Concept",
            "description": "Origin of idea.",
            "findings": [
              {
                "id": "concept-finding",
                "name": "Concept",
                "description": "Concept origin.",
                "questions": [
                  {
                    "text": "Who proposed the concept and when?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is it from science or fiction?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "scale",
        "name": "Scale",
        "description": "Size.",
        "rationale": "Scale defines megastructures.",
        "layers": [
          {
            "id": "dimensions",
            "name": "Dimensions",
            "description": "Size.",
            "findings": [
              {
                "id": "dimensions-finding",
                "name": "Dimensions",
                "description": "Dimensions.",
                "questions": [
                  {
                    "text": "What are its dimensions?",
                    "kind": "measurement"
                  },
                  {
                    "text": "How does it compare with other structures?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          },
          {
            "id": "resources",
            "name": "Resources",
            "description": "Materials and energy.",
            "findings": [
              {
                "id": "resources-finding",
                "name": "Resources",
                "description": "Resources.",
                "questions": [
                  {
                    "text": "What materials and energy would it require?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Are the estimates sourced?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "feasibility",
        "name": "Feasibility",
        "description": "Could it work.",
        "rationale": "Feasibility is debated.",
        "layers": [
          {
            "id": "physics",
            "name": "Physics",
            "description": "Constraints.",
            "findings": [
              {
                "id": "physics-finding",
                "name": "Physics",
                "description": "Physical constraints.",
                "questions": [
                  {
                    "text": "What physical constraints apply, such as stability or strength?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which analyses address them?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "search",
            "name": "Search",
            "description": "Technosignatures.",
            "findings": [
              {
                "id": "search-finding",
                "name": "Search",
                "description": "Technosignature searches.",
                "questions": [
                  {
                    "text": "Have astronomers searched for such structures?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Are any claims confirmed?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "culture",
        "name": "Culture",
        "description": "Fiction.",
        "rationale": "Fiction popularised them.",
        "layers": [
          {
            "id": "works",
            "name": "Works",
            "description": "Books and games.",
            "findings": [
              {
                "id": "works-finding",
                "name": "Works",
                "description": "Fictional works.",
                "questions": [
                  {
                    "text": "Which works feature this megastructure?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How is it depicted?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "projects",
            "name": "Projects",
            "description": "Real megaprojects.",
            "findings": [
              {
                "id": "projects-finding",
                "name": "Projects",
                "description": "Real projects.",
                "questions": [
                  {
                    "text": "Which real projects are proposed at similar scale?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What is their status?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should built and hypothetical megastructures be separate entries?",
    "How should concept sources be cited?",
    "How should technosignature searches be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}