{
  "context": "Evaluates how well the solution leans on github.com/prometheus/client_model/go to normalize and validate metric kinds. Scoring emphasizes correct use of the package's MetricType enum, its generated name/value maps, and enum helpers for canonical string handling and validation paths.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "MetricType usage",
      "description": "MetricKindValue is backed by the package's MetricType values (e.g., MetricType_COUNTER, MetricType_HISTOGRAM) via direct import of github.com/prometheus/client_model/go instead of custom integers.",
      "max_score": 20
    },
    {
      "name": "String to enum",
      "description": "ParseMetricKind normalizes input and resolves kinds through MetricType_value (or equivalent lookup against MetricType) rather than ad-hoc string lists, covering aliases like hyphen/underscore gauge histogram.",
      "max_score": 25
    },
    {
      "name": "Enum to string",
      "description": "CanonicalMetricKind uses MetricType_name or the MetricType.String() helper to emit canonical uppercase names (including GAUGE_HISTOGRAM) instead of handcrafted switch strings.",
      "max_score": 20
    },
    {
      "name": "Payload gating",
      "description": "ValidateMetricPayload compares payload choices against MetricType constants to enforce the single allowed payload per kind (counter, gauge, summary, untyped, histogram/gauge histogram) instead of unconstrained flags.",
      "max_score": 20
    },
    {
      "name": "Unsupported handling",
      "description": "Unsupported kinds or numeric values are detected by checking absence in MetricType_name/MetricType_value (or failed MetricType parsing) and surfaced as errors without defaulting to arbitrary integers.",
      "max_score": 15
    }
  ]
}