{
  "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"
  },
  "metaModel": {
    "id": "THING-Q385348",
    "registryId": "vr.tr.proscenium",
    "name": "proscenium",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q385348/",
  "model": {
    "registry_id": "vr.tr.proscenium",
    "name": "proscenium",
    "purpose": "Let an agent explain the proscenium and the proscenium arch, their role in theatre design and staging, relay history and examples, and distinguish the proscenium form from other stage configurations.",
    "definition": "The part of a theatre stage in front of the curtain, and the arch or frame that separates the stage from the auditorium, through which the audience views the performance as through a picture frame; the proscenium arch defines the proscenium theatre form dominant since the seventeenth century, houses the curtain and lighting positions, and contrasts with thrust, arena and black box configurations.",
    "what_it_is_for": "Framing the stage for the audience.",
    "affordances": [
      "explain the element and its role",
      "relay history and examples",
      "distinguish stage configurations",
      "relay design considerations"
    ],
    "distinguishing_features": [
      "Picture-frame viewing",
      "Curtain line",
      "Defines a theatre type",
      "Baroque origin"
    ],
    "appearance": "A large rectangular or arched opening framing the stage, often decorated, with the curtain hung behind it.",
    "visual_identification": [
      "Frame between stage and auditorium",
      "Curtain and forestage associated",
      "Thrust and arena stages extend into the audience without a frame"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "proscenium arches of baroque and nineteenth-century theatres",
      "modern proscenium stages with fly towers",
      "the forestage or apron in front of the arch",
      "adjustable prosceniums",
      "proscenium theatres as a building type"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "built structure",
        "why": "in registry terms"
      },
      {
        "relation": "is part of",
        "target": "stage",
        "why": "the front frame"
      },
      {
        "relation": "defines",
        "target": "proscenium theatre",
        "why": "the theatre type"
      },
      {
        "relation": "is contrasted with",
        "target": "thrust stage",
        "why": "without a frame"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Building and fire safety codes for theatres, including safety curtains",
      "Stage machinery standards"
    ],
    "failure_modes_and_hazards": [
      "Sightline restrictions",
      "Fire risk at the stage opening, addressed by safety curtains",
      "Confusing proscenium with apron or curtain"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": []
  },
  "sources": [],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What a proscenium is.",
        "rationale": "Definition.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition and parts.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is the proscenium, and how do the arch, curtain and apron relate?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the proscenium, the apron or the whole stage?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "configurations",
            "name": "Configurations",
            "description": "Stage configurations.",
            "findings": [
              {
                "id": "configurations-finding",
                "name": "Configurations",
                "description": "Configurations.",
                "questions": [
                  {
                    "text": "How does the proscenium form differ from thrust, arena and black box stages?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific configuration?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "design",
        "name": "Design",
        "description": "Design and safety.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "design",
            "name": "Design",
            "description": "Design.",
            "findings": [
              {
                "id": "design-finding",
                "name": "Design",
                "description": "Design.",
                "questions": [
                  {
                    "text": "How are proscenium openings sized and equipped for sightlines, lighting and scenery?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits theatre architecture?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "What fire and safety rules apply at the proscenium, such as safety curtains?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "history",
        "name": "History",
        "description": "History.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "origins",
            "name": "Origins",
            "description": "Origins.",
            "findings": [
              {
                "id": "origins-finding",
                "name": "Origins",
                "description": "Origins.",
                "questions": [
                  {
                    "text": "How did the proscenium arch develop in Renaissance and baroque Italy?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of theatre?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "examples",
            "name": "Examples",
            "description": "Notable examples.",
            "findings": [
              {
                "id": "examples-finding",
                "name": "Examples",
                "description": "Examples.",
                "questions": [
                  {
                    "text": "Which theatres have notable prosceniums?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the specific theatre?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "practice",
        "name": "Practice",
        "description": "Staging and debate.",
        "rationale": "Attribution.",
        "layers": [
          {
            "id": "staging",
            "name": "Staging",
            "description": "Staging.",
            "findings": [
              {
                "id": "staging-finding",
                "name": "Staging",
                "description": "Staging.",
                "questions": [
                  {
                    "text": "How does the proscenium shape staging, illusion and the fourth wall?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits fourth wall?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "debate",
            "name": "Debate",
            "description": "Debates.",
            "findings": [
              {
                "id": "debate-finding",
                "name": "Debate",
                "description": "Debate.",
                "questions": [
                  {
                    "text": "What debates exist about proscenium versus open staging, with positions attributed?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the presentation neutral?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should proscenium theatre be a separate entry?",
    "How should theatre design references be linked?",
    "How should historical prosceniums be recorded?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}