{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.proofagent.ai/eio-agents/schema/eio/0.6.0/evidence-graph.schema.json",
  "title": "EIO local evidence graph",
  "type": "object",
  "required": ["schema_version", "run_id", "nodes", "edges", "evidence_refs", "provenance"],
  "additionalProperties": false,
  "properties": {
    "schema_version": {"type": "string"},
    "run_id": {"type": "string", "minLength": 1},
    "episode_id": {"type": "string"},
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "type", "attributes"],
        "additionalProperties": false,
        "properties": {
          "id": {"type": "string", "minLength": 1},
          "type": {"type": "string", "pattern": "^eio\\."},
          "attributes": {"type": "object"}
        }
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["subject", "relation", "object", "evidence"],
        "additionalProperties": false,
        "properties": {
          "subject": {"type": "string"},
          "relation": {"type": "string", "pattern": "^eio\\.relation\\."},
          "object": {"type": "string"},
          "evidence": {"type": "array", "items": {"type": "string"}},
          "resolver": {"type": "string", "pattern": "^eio\\.resolver\\."},
          "confidence": {"type": "number", "minimum": 0, "maximum": 1}
        }
      }
    },
    "evidence_refs": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "kind", "source_type"],
        "properties": {
          "id": {"type": "string"},
          "kind": {"type": "string"},
          "source_type": {"type": "string"},
          "turn_index": {"type": "integer", "minimum": 0},
          "text": {"type": "string"},
          "char_start": {"type": "integer", "minimum": 0},
          "char_end": {"type": "integer", "minimum": 0},
          "source_ref": {"type": "string"},
          "inputs": {"type": "object"},
          "formula": {"type": "string"},
          "output": {}
        },
        "additionalProperties": true
      }
    },
    "provenance": {
      "type": "object",
      "required": ["ontology_modules", "extractors", "source_hashes"],
      "additionalProperties": false,
      "properties": {
        "ontology_modules": {"type": "object", "additionalProperties": {"type": "string"}},
        "extractors": {"type": "object", "additionalProperties": {"type": "string"}},
        "source_hashes": {"type": "object", "additionalProperties": {"type": "string"}},
        "created_at": {"type": "string", "format": "date-time"}
      }
    }
  }
}