{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T12:48:55Z",
    "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"
  },
  "metaModel": {
    "id": "THING-Q928495",
    "registryId": "vr.tr.chthonian-planet",
    "name": "Chthonian planet",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.SPC"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q928495/",
  "model": {
    "registry_id": "vr.tr.chthonian-planet",
    "name": "Chthonian planet",
    "purpose": "Let an agent explain chthonian planets as a hypothesis, with attributed candidate claims, formation models and observational tests.",
    "definition": "A hypothetical class of planet consisting of the remnant rocky or metallic core of a gas giant whose hydrogen and helium atmosphere has been stripped away by intense heating from a nearby star; some close-in exoplanets have been proposed as candidates.",
    "what_it_is_for": "Exoplanet science and planet evolution.",
    "affordances": [
      "explain the chthonian planet idea",
      "summarise proposed candidates with sources",
      "describe how atmospheric stripping works",
      "distinguish from super-Earths"
    ],
    "distinguishing_features": [
      "Hypothetical",
      "Stripped gas giant core",
      "Very close to its star",
      "High density"
    ],
    "appearance": "Not directly imaged; inferred from mass, radius and density measurements of close-in exoplanets.",
    "visual_identification": [
      "Dense close-in planets",
      "Evidence of atmospheric escape",
      "Super-Earths may form rocky from the start"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "proposed chthonian candidates",
      "evaporating hot Jupiters (precursors)",
      "exposed planetary cores"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "hypothetical planet",
        "why": "category"
      },
      {
        "relation": "is formed from",
        "target": "hot Jupiter",
        "why": "precursor"
      },
      {
        "relation": "is contrasted with",
        "target": "super-Earth",
        "why": "related class"
      },
      {
        "relation": "is studied by",
        "target": "exoplanet science",
        "why": "field"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "No specific regulation"
    ],
    "failure_modes_and_hazards": [
      "Presenting candidates as confirmed",
      "Over-interpreting density measurements"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": []
  },
  "sources": [],
  "structure": {
    "bundles": [
      {
        "id": "hypothesis",
        "name": "Hypothesis",
        "description": "What is proposed.",
        "rationale": "Status is hypothetical.",
        "layers": [
          {
            "id": "idea",
            "name": "Idea",
            "description": "Stripped cores.",
            "findings": [
              {
                "id": "idea-finding",
                "name": "Idea",
                "description": "Idea.",
                "questions": [
                  {
                    "text": "How would a gas giant lose its envelope to become a chthonian planet?",
                    "kind": "definition"
                  },
                  {
                    "text": "How long would it take, according to models?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          },
          {
            "id": "status",
            "name": "Status",
            "description": "Evidence.",
            "findings": [
              {
                "id": "status-finding",
                "name": "Status",
                "description": "Evidential status.",
                "questions": [
                  {
                    "text": "Has any planet been confirmed as a chthonian planet?",
                    "kind": "boundary"
                  },
                  {
                    "text": "What evidence would be decisive?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "candidates",
        "name": "Candidates",
        "description": "Proposed examples.",
        "rationale": "Claims need attribution.",
        "layers": [
          {
            "id": "examples",
            "name": "Examples",
            "description": "Named candidates.",
            "findings": [
              {
                "id": "examples-finding",
                "name": "Examples",
                "description": "Candidates.",
                "questions": [
                  {
                    "text": "Which exoplanets have been proposed as exposed cores, and by whom?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Are the claims disputed?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "data",
            "name": "Data",
            "description": "Mass and radius.",
            "findings": [
              {
                "id": "data-finding",
                "name": "Data",
                "description": "Measurements.",
                "questions": [
                  {
                    "text": "What are the measured mass, radius and density of this candidate?",
                    "kind": "measurement"
                  },
                  {
                    "text": "How uncertain are they?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "physics",
        "name": "Physics",
        "description": "Processes.",
        "rationale": "Stars erode atmospheres.",
        "layers": [
          {
            "id": "escape",
            "name": "Escape",
            "description": "Atmospheric escape.",
            "findings": [
              {
                "id": "escape-finding",
                "name": "Escape",
                "description": "Atmospheric escape.",
                "questions": [
                  {
                    "text": "How does stellar radiation drive atmospheric escape?",
                    "kind": "definition"
                  },
                  {
                    "text": "How is escape observed?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "interior",
            "name": "Interior",
            "description": "Core composition.",
            "findings": [
              {
                "id": "interior-finding",
                "name": "Interior",
                "description": "Interior.",
                "questions": [
                  {
                    "text": "What would the core of a gas giant be made of, according to models?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How does that compare with rocky planets?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "distinctions",
        "name": "Distinctions",
        "description": "Related classes.",
        "rationale": "Classes overlap.",
        "layers": [
          {
            "id": "superearth",
            "name": "Super-Earth",
            "description": "Rocky planets.",
            "findings": [
              {
                "id": "superearth-finding",
                "name": "Super-Earth",
                "description": "Super-Earths.",
                "questions": [
                  {
                    "text": "How can a chthonian planet be told apart from a planet that formed rocky?",
                    "kind": "boundary"
                  },
                  {
                    "text": "Which observations help?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "catalogue",
            "name": "Catalogue",
            "description": "Exoplanet archives.",
            "findings": [
              {
                "id": "catalogue-finding",
                "name": "Catalogue",
                "description": "Catalogues.",
                "questions": [
                  {
                    "text": "Where can exoplanet parameters be looked up?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How are classes labelled there?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should candidates be separate entries?",
    "How should exoplanet catalogues be linked?",
    "How should claims be attributed?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}