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                              "capacity",
                              "style",
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                              "needs",
                              "rules",
                              "architecture",
                              "exclusions",
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                          },
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                                {
                                  "const": "center",
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                                {
                                  "const": "perimeter",
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                                  "type": "null"
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                                  "type": "string"
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                                  "const": "near-window",
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                                {
                                  "type": "null"
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                                  {
                                    "type": "null"
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                                    "type": "string"
                                  },
                                  {
                                    "const": "+X",
                                    "type": "string"
                                  },
                                  {
                                    "const": "-Z",
                                    "type": "string"
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                                  {
                                    "const": "-X",
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                                    "type": "null"
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                                    "type": "number"
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                                    "type": "null"
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                                    "const": "curated",
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                                    "const": "ai_inferred",
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                                    "const": "user_confirmed",
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                                    "const": "project_specific",
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                                    "type": "null"
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                                    "type": "string"
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                                    "type": "null"
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                                    "type": "string"
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                        "const": "archetype",
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                        "const": "unknown",
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                ],
                "additionalProperties": false
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                        "const": "front",
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                        "const": "opening-header",
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                        "const": "opening-sill",
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                        "type": "null"
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                        "const": "kinematic",
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                        "const": "none",
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                        "type": "null"
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                              "type": "array",
                              "prefixItems": [
                                {
                                  "type": "number"
                                },
                                {
                                  "type": "number"
                                },
                                {
                                  "type": "number"
                                }
                              ],
                              "minItems": 3,
                              "maxItems": 3,
                              "items": false
                            }
                          },
                          "required": ["kind", "center", "halfExtents"],
                          "additionalProperties": false
                        },
                        {
                          "type": "object",
                          "properties": {
                            "kind": {
                              "const": "convex",
                              "type": "string"
                            },
                            "vertices": {
                              "type": "array",
                              "items": {
                                "type": "number"
                              }
                            }
                          },
                          "required": ["kind", "vertices"],
                          "additionalProperties": false
                        },
                        {
                          "type": "object",
                          "properties": {
                            "kind": {
                              "const": "triangle-mesh",
                              "type": "string"
                            },
                            "vertices": {
                              "type": "array",
                              "items": {
                                "type": "number"
                              }
                            },
                            "indices": {
                              "type": "array",
                              "items": {
                                "type": "number"
                              }
                            }
                          },
                          "required": ["kind", "vertices", "indices"],
                          "additionalProperties": false
                        }
                      ]
                    },
                    "volumeM3": {
                      "type": "number"
                    },
                    "evidence": {
                      "type": "string"
                    },
                    "approximate": {
                      "anyOf": [
                        {
                          "const": false,
                          "type": "boolean"
                        },
                        {
                          "const": true,
                          "type": "boolean"
                        }
                      ]
                    }
                  },
                  "required": ["shape", "volumeM3", "evidence", "approximate"],
                  "additionalProperties": false
                }
              }
            },
            "required": [
              "instanceId",
              "motion",
              "collision",
              "controller",
              "role",
              "canGrab",
              "massKg",
              "friction",
              "restitution",
              "colliders"
            ],
            "additionalProperties": false
          }
        },
        "diagnostics": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "code": {
                "type": "string"
              },
              "severity": {
                "anyOf": [
                  {
                    "const": "error",
                    "type": "string"
                  },
                  {
                    "const": "warning",
                    "type": "string"
                  }
                ]
              },
              "instanceId": {
                "anyOf": [
                  {
                    "type": "null"
                  },
                  {
                    "type": "string"
                  }
                ]
              },
              "message": {
                "type": "string"
              }
            },
            "required": ["code", "severity", "instanceId", "message"],
            "additionalProperties": false
          }
        }
      },
      "required": [
        "version",
        "ready",
        "gravity",
        "stepSeconds",
        "maxCatchUpSteps",
        "bodies",
        "diagnostics"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "schema",
    "schemaVersion",
    "semantic",
    "projection",
    "evaluations",
    "diagnostics",
    "provenance",
    "readiness"
  ],
  "additionalProperties": false
}