{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.invalid/techviz/vizspec-1.1.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": {
      "enum": ["1.0", "1.1"]
    },
    "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}
          }
        }
      }
    },
    "composition": {
      "$ref": "#/$defs/composition"
    },
    "groups": {
      "type": "array",
      "items": {"$ref": "#/$defs/group"}
    },
    "nodes": {
      "type": "array",
      "minItems": 1,
      "items": {"$ref": "#/$defs/node"}
    },
    "edges": {
      "type": "array",
      "items": {"$ref": "#/$defs/edge"}
    },
    "legend": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["symbol", "meaning"],
        "additionalProperties": false,
        "properties": {
          "symbol": {"type": "string"},
          "meaning": {"type": "string"}
        }
      }
    },
    "metadata": {
      "type": "object"
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {"version": {"const": "1.1"}},
        "required": ["version"]
      },
      "then": {
        "required": ["composition"]
      }
    }
  ],
  "$defs": {
    "composition": {
      "type": "object",
      "required": ["profile", "diagram_only", "reference_ids", "rationale"],
      "additionalProperties": false,
      "properties": {
        "profile": {
          "enum": [
            "component-flow",
            "orchestrator-workers",
            "query-fanout",
            "timeline",
            "reconciliation-loop",
            "resource-controller",
            "two-zone-pipeline",
            "sequence",
            "ports-adapters",
            "comparison"
          ]
        },
        "diagram_only": {"const": true},
        "reference_ids": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {"type": "string"}
        },
        "rationale": {
          "type": "string",
          "minLength": 1
        },
        "focus_node": {
          "type": "string"
        }
      }
    },
    "evidenceArray": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["start_line", "end_line"],
        "additionalProperties": false,
        "properties": {
          "start_line": {"type": "integer", "minimum": 1},
          "end_line": {"type": "integer", "minimum": 1},
          "quote": {"type": "string"}
        }
      }
    },
    "group": {
      "type": "object",
      "required": ["id", "label", "evidence", "assumption"],
      "additionalProperties": false,
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
        },
        "label": {"type": "string", "minLength": 1},
        "kind": {"type": "string"},
        "role": {"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}}
          }
        }
      ]
    },
    "node": {
      "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": "#/$defs/evidenceArray"},
        "assumption": {"type": "boolean"},
        "icon": {"type": "string"},
        "link": {"type": "string"},
        "role": {"type": "string"},
        "shape": {"type": "string"},
        "details": {
          "type": "array",
          "maxItems": 8,
          "items": {"type": "string"}
        },
        "position": {"type": "integer", "minimum": 1},
        "emphasis": {
          "enum": ["primary", "normal", "muted", "warning"]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {"assumption": {"const": true}},
            "required": ["assumption"]
          },
          "then": {
            "properties": {"evidence": {"maxItems": 0}}
          }
        }
      ]
    },
    "edge": {
      "type": "object",
      "required": ["id", "from", "to", "label", "kind", "evidence", "assumption"],
      "additionalProperties": false,
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[A-Za-z][A-Za-z0-9_.-]*$"
        },
        "from": {"type": "string"},
        "to": {"type": "string"},
        "label": {"type": "string"},
        "kind": {"type": "string"},
        "order": {"type": "integer", "minimum": 1},
        "style": {"enum": ["solid", "dashed", "dotted"]},
        "emphasis": {
          "enum": ["primary", "normal", "muted", "warning"]
        },
        "evidence": {"$ref": "#/$defs/evidenceArray"},
        "assumption": {"type": "boolean"}
      },
      "allOf": [
        {
          "if": {
            "properties": {"assumption": {"const": true}},
            "required": ["assumption"]
          },
          "then": {
            "properties": {"evidence": {"maxItems": 0}}
          }
        }
      ]
    }
  }
}