{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": ["requestId", "decision"],
  "properties": {
    "requestId": { "type": "string", "minLength": 1, "maxLength": 100 },
    "decision": { "type": "string", "enum": ["approve", "reject", "assign"] },
    "assigneeKey": { "type": "string", "enum": ["self", "backup"] },
    "reviewComment": { "type": "string", "maxLength": 500 }
  },
  "additionalProperties": false
}