{
  "schema": "callback_prompt_byte_telemetry.baseline.v1",
  "ts_kst": "2026-05-20 22:00 KST",
  "mode": "baseline-observation · read-only audit · append-only",
  "measurement_unit": "UTF-8 bytes (printf | wc -c)",
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    "min_bytes": 139,
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    "under_2800_count": 48,
    "between_2801_3500": 0,
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    "all_status_ok": 48
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  "chair_thresholds": {
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    "warning_threshold_bytes": 3500,
    "recommended_target": "2800~3200 bytes"
  }
}