{
  "context": "Evaluates how the implementation leverages Luigi's target abstractions and atomic I/O helpers to implement the ProcessAndBackupTask. Checks emphasize atomic writes, format-aware reads/writes (including gzip), and returning Target objects instead of raw paths.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Target inputs",
      "description": "Input handling uses a Luigi Target (e.g., LocalTarget) with an appropriate format so .gz inputs are read transparently via target.open rather than manual gzip handling.",
      "max_score": 20
    },
    {
      "name": "Atomic processed write",
      "description": "Processed output is written through Luigi's atomic write helpers (LocalTarget.open or atomic_file) so the final file only materializes after successful completion.",
      "max_score": 25
    },
    {
      "name": "Failure cleanup",
      "description": "When fail_midway triggers an exception, reliance on Luigi's atomic write wrapper removes any partial processed/backup files, leaving no half-written artifacts.",
      "max_score": 15
    },
    {
      "name": "Gzip backup target",
      "description": "Backup output uses a Luigi Target configured with a gzip format (e.g., LocalTarget(..., format=luigi.format.Gzip)) and writes through target.open to produce a compressed copy of the processed content.",
      "max_score": 20
    },
    {
      "name": "Output mapping targets",
      "description": "output() returns Luigi Target objects keyed as processed and backup, not raw paths, enabling scheduler completeness checks on both targets.",
      "max_score": 20
    }
  ]
}