{
  "context": "Evaluates whether the solution leans on the base64url package to encode and decode payloads with optional encoding support, maintains URL-safe output, and uses the library's built-in validation rather than reimplementing Base64 handling.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Encode API",
      "description": "Uses the base64url default export or base64url.encode to transform string or Buffer inputs into padding-free URL-safe strings instead of manual Base64 manipulation.",
      "max_score": 30
    },
    {
      "name": "Optional encoding",
      "description": "Passes a non-default encoding (e.g., \"binary\") through the base64url.encode/default export call to interpret string inputs correctly, rather than crafting Buffers manually.",
      "max_score": 20
    },
    {
      "name": "Decode API",
      "description": "Restores text using base64url.decode with the requested encoding (including \"binary\" when specified) instead of custom Buffer/base64 logic.",
      "max_score": 20
    },
    {
      "name": "Input validation",
      "description": "Relies on base64url's TypeError for non-string/Buffer inputs (or equivalent pre-checks mirroring the library's accepted types) rather than accepting arbitrary types silently.",
      "max_score": 15
    },
    {
      "name": "URL-safe output",
      "description": "Ensures produced strings remain URL-safe (no '=' padding, '+'/'/' replacements) by using base64url helpers such as encode/default export or fromBase64/toBase64.",
      "max_score": 15
    }
  ]
}