{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "sample_id", "approved", "maximum_training_use", "invariant_violations",
    "unsupported_changes", "evidence", "summary"
  ],
  "properties": {
    "sample_id": {"type": "string", "minLength": 1},
    "approved": {"type": "boolean"},
    "maximum_training_use": {
      "enum": ["SFT_FULL", "SFT_STEP_ONLY", "DPO_REJECTED", "ERROR_ANALYSIS", "HOLD", "DROP"]
    },
    "invariant_violations": {
      "type": "array", "uniqueItems": true,
      "items": {
        "enum": [
          "RESOLVED_CHANGED", "TOOL_OUTPUT_CHANGED", "MODEL_PATCH_CHANGED", "REFERENCE_PATCH_CHANGED",
          "SYNTHETIC_EXECUTION_RESULT_ADDED", "STATEFUL_TURN_REMOVED", "DANGLING_TOOL_PAIR",
          "SEMANTIC_TOOL_CALL_CHANGED_WITHOUT_EXECUTION", "TRAINING_USE_UPGRADED_WITHOUT_EVIDENCE"
        ]
      }
    },
    "unsupported_changes": {
      "type": "array",
      "items": {"type": "string", "minLength": 1, "maxLength": 400}
    },
    "evidence": {
      "type": "array", "minItems": 1, "maxItems": 20,
      "items": {
        "type": "object", "additionalProperties": false,
        "required": ["turn_id", "quote", "assessment"],
        "properties": {
          "turn_id": {"type": ["integer", "null"], "minimum": 1},
          "quote": {"type": "string", "minLength": 1, "maxLength": 240},
          "assessment": {"type": "string", "minLength": 1, "maxLength": 400}
        }
      }
    },
    "summary": {"type": "string", "minLength": 1, "maxLength": 1000}
  }
}