{
  "rule": "usage.input_tokens counts the state once: five equal questions cost four questions more than one, not four states more; output_tokens is 0.",
  "cases": [
    {
      "path": [
        "native",
        "compat"
      ],
      "send": [
        {
          "state": {
            "$words": 400
          },
          "questions": {
            "$questions": [
              1,
              {
                "type": "noul",
                "instructions": "Is this about billing?",
                "criteria": {
                  "true": "it concerns charges, invoices or refunds",
                  "false": "it concerns something else"
                }
              }
            ]
          }
        },
        {
          "state": {
            "$words": 400
          },
          "questions": {
            "$questions": [
              5,
              {
                "type": "noul",
                "instructions": "Is this about billing?",
                "criteria": {
                  "true": "it concerns charges, invoices or refunds",
                  "false": "it concerns something else"
                }
              }
            ]
          }
        }
      ],
      "expect": {
        "status": 200,
        "checks": [
          "usage_once"
        ]
      }
    }
  ]
}