{
  "context": "Main eval weighted natural implementation: non-overlapping Java 24 bounded remote-check scenario; measures bounded stream concurrency for blocking calls without reusing runtime favorite-products examples.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Creates coherent Java 24 artifact",
      "description": "Creates DeliveryAppointments.java with the requested method, nested types, imports, and Java 24-compatible code.",
      "max_score": 20
    },
    {
      "name": "Preserves appointment behavior",
      "description": "Returns only appointments whose token passes CalendarService.canSchedule and sorts the final returned appointments by Appointment::startsAt, then Appointment::token.",
      "max_score": 40
    },
    {
      "name": "Uses bounded Gatherers.mapConcurrent",
      "description": "Uses Gatherers.mapConcurrent with an explicit max concurrency no greater than 8 to perform the blocking CalendarService.canSchedule calls inside the stream chain.",
      "max_score": 180
    },
    {
      "name": "Carries appointment with schedule result",
      "description": "Keeps each Appointment associated with its schedule-check result using a non-null holder, then filters by the boolean result before mapping back to Appointment.",
      "max_score": 80
    },
    {
      "name": "Rejects weak concurrency choices",
      "description": "Does not use parallelStream(), .parallel(), unbounded CompletableFuture fan-out, or shared mutable state for collecting remote check results.",
      "max_score": 60
    },
    {
      "name": "Keeps implementation focused",
      "description": "Avoids unrelated caching, retries, dependencies, API redesign, or broad concurrency framework changes.",
      "max_score": 20
    }
  ]
}