{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "required": ["summary", "suspected_layer", "root_cause", "evidence", "recommendations", "validation_sql", "confidence"],
  "properties": {
    "summary": {"type": "string"},
    "suspected_layer": {
      "type": "string",
      "enum": ["source_data", "etl_logic", "target_data", "test_case", "environment", "requirement_ambiguity", "unknown"]
    },
    "root_cause": {"type": "string"},
    "evidence": {"type": "array", "items": {"type": "string"}},
    "recommendations": {"type": "array", "items": {"type": "string"}},
    "validation_sql": {"type": "array", "items": {"type": "string"}},
    "confidence": {"type": "string", "enum": ["low", "medium", "high"]}
  },
  "additionalProperties": false
}