{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.invalid/techviz/vizspec-1.0.schema.json",
  "title": "TechViz Grounded Visualization Specification",
  "type": "object",
  "required": [
    "version",
    "id",
    "title",
    "question",
    "type",
    "direction",
    "summary",
    "alt",
    "long_description",
    "source_context",
    "nodes",
    "edges"
  ],
  "additionalProperties": false,
  "properties": {
    "version": {
      "const": "1.0"
    },
    "id": {
      "type": "string",
      "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
    },
    "title": {
      "type": "string",
      "minLength": 1
    },
    "question": {
      "type": "string",
      "minLength": 1
    },
    "type": {
      "enum": [
        "context",
        "architecture",
        "container",
        "component",
        "deployment",
        "data-flow",
        "sequence",
        "flow",
        "state",
        "network",
        "erd",
        "dependency",
        "concept"
      ]
    },
    "direction": {
      "enum": [
        "LR",
        "RL",
        "TB",
        "BT"
      ]
    },
    "audience": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "summary": {
      "type": "string",
      "minLength": 1
    },
    "alt": {
      "type": "string",
      "minLength": 1
    },
    "long_description": {
      "type": "string",
      "minLength": 1
    },
    "source_context": {
      "type": "object",
      "required": [
        "document",
        "document_sha256",
        "anchor"
      ],
      "additionalProperties": true,
      "properties": {
        "document": {
          "type": "string"
        },
        "document_sha256": {
          "type": "string",
          "pattern": "^[a-f0-9]{64}$"
        },
        "anchor": {
          "type": "object",
          "required": [
            "kind",
            "value",
            "line"
          ],
          "additionalProperties": true,
          "properties": {
            "kind": {
              "enum": [
                "marker",
                "heading",
                "line"
              ]
            },
            "value": {},
            "line": {
              "type": "integer",
              "minimum": 1
            }
          }
        }
      }
    },
    "groups": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "label",
          "evidence",
          "assumption"
        ],
        "additionalProperties": false,
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
          },
          "label": {
            "type": "string",
            "minLength": 1
          },
          "kind": {
            "type": "string"
          },
          "parent": {
            "type": "string"
          },
          "description": {
            "type": "string"
          },
          "evidence": {
            "$ref": "#/$defs/evidenceArray"
          },
          "assumption": {
            "type": "boolean"
          }
        },
        "allOf": [
          {
            "if": {
              "properties": {
                "assumption": {
                  "const": true
                }
              },
              "required": [
                "assumption"
              ]
            },
            "then": {
              "properties": {
                "evidence": {
                  "maxItems": 0
                }
              }
            }
          }
        ]
      }
    },
    "nodes": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": [
          "id",
          "label",
          "kind",
          "evidence",
          "assumption"
        ],
        "additionalProperties": false,
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
          },
          "label": {
            "type": "string",
            "minLength": 1
          },
          "kind": {
            "type": "string"
          },
          "group": {
            "type": "string"
          },
          "description": {
            "type": "string"
          },
          "evidence": {
            "$ref": "#/$defs/evidenceArray"
          },
          "assumption": {
            "type": "boolean"
          },
          "icon": {
            "type": "string"
          },
          "link": {
            "type": "string"
          }
        },
        "allOf": [
          {
            "if": {
              "properties": {
                "assumption": {
                  "const": true
                }
              },
              "required": [
                "assumption"
              ]
            },
            "then": {
              "properties": {
                "evidence": {
                  "maxItems": 0
                }
              }
            }
          }
        ]
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "from",
          "to",
          "label",
          "kind",
          "evidence",
          "assumption"
        ],
        "additionalProperties": false,
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
          },
          "from": {
            "type": "string"
          },
          "to": {
            "type": "string"
          },
          "label": {
            "type": "string"
          },
          "kind": {
            "type": "string"
          },
          "order": {
            "type": "integer",
            "minimum": 1
          },
          "evidence": {
            "$ref": "#/$defs/evidenceArray"
          },
          "assumption": {
            "type": "boolean"
          }
        },
        "allOf": [
          {
            "if": {
              "properties": {
                "assumption": {
                  "const": true
                }
              },
              "required": [
                "assumption"
              ]
            },
            "then": {
              "properties": {
                "evidence": {
                  "maxItems": 0
                }
              }
            }
          }
        ]
      }
    },
    "legend": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "symbol",
          "meaning"
        ],
        "additionalProperties": false,
        "properties": {
          "symbol": {
            "type": "string"
          },
          "meaning": {
            "type": "string"
          }
        }
      }
    },
    "metadata": {
      "type": "object"
    }
  },
  "$defs": {
    "evidenceArray": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "start_line",
          "end_line"
        ],
        "additionalProperties": false,
        "properties": {
          "start_line": {
            "type": "integer",
            "minimum": 1
          },
          "end_line": {
            "type": "integer",
            "minimum": 1
          },
          "quote": {
            "type": "string"
          }
        }
      }
    }
  }
}