{
  "sample_seed": 20260325,
  "u_field": "sampling_u",
  "window_duration_seconds": 10.0,
  "windows": [
    {
      "window_id": "chat_w_example_0001",
      "trace_type": "chat",
      "trace_file": "traces/chat_w_example_0001.jsonl",
      "window_start": 0.0,
      "window_end": 10.0,
      "num_requests": 3
    }
  ]
}
