{
  "context": "Criteria evaluates how well the solution leverages the base64url package to normalize standard base64 strings into URL-safe, unpadded output for single and batched inputs while preserving correctness for already-normalized values.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "fromBase64 usage",
      "description": "Single-value conversion calls `base64url.fromBase64` (or the default callable `base64url(...)` with base64 input) to generate base64url output rather than manual character substitution.",
      "max_score": 35
    },
    {
      "name": "Padding removed",
      "description": "Relies on base64url output (e.g., `fromBase64`) to strip `=` padding on conversions instead of ad-hoc trimming.",
      "max_score": 15
    },
    {
      "name": "URL-safe mapping",
      "description": "Uses base64url conversion to swap `+`/`/` to `-`/`_`, avoiding custom replace logic.",
      "max_score": 15
    },
    {
      "name": "Batch via package",
      "description": "Array normalization applies a base64url conversion (`fromBase64` or callable form) to every element while preserving order.",
      "max_score": 20
    },
    {
      "name": "Idempotent handling",
      "description": "Detects or re-normalizes already URL-safe input using base64url utilities (such as `toBase64` + `fromBase64`) so unchanged content stays intact without manual checks.",
      "max_score": 15
    }
  ]
}