{
  "context": "Evaluates whether the solution uses the furl library to parse URLs and surface scheme/credential/host/port/netloc/origin data as required by the spec. Scoring favors direct use of furl's parsing and serialization helpers and penalizes manual URL manipulation.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "furl constructor",
      "description": "Parses each URL by instantiating `furl.furl` (or `furl` imported directly) instead of manual string splitting.",
      "max_score": 25
    },
    {
      "name": "Component access",
      "description": "Populates scheme, username, password, host, and port fields by reading the parsed object's attributes (e.g., `f.scheme`, `f.username`, `f.password`, `f.host`, `f.port`) rather than re-deriving them.",
      "max_score": 25
    },
    {
      "name": "Netloc and origin",
      "description": "Derives netloc and origin via furl APIs (`f.netloc`/`f.netloc.url` and `f.origin`) instead of custom concatenation, respecting credentials when present.",
      "max_score": 20
    },
    {
      "name": "Default ports",
      "description": "Relies on furl's default port inference (e.g., http→80, https→443, ftp→21) from `f.port` rather than hard-coded mappings to satisfy cases without explicit ports.",
      "max_score": 15
    },
    {
      "name": "Full URL string",
      "description": "Returns the canonical URL string using furl helpers (`f.url` or `f.tostr()`), preserving credentials and paths without manual reconstruction.",
      "max_score": 15
    }
  ]
}