{
  "title": "The POS Protocol — Carolyn Dail",
  "version": "1.0.0",
  "author": "Carolyn Dail",
  "location": "Herndon, VA",
  "timestamp": "2026-07-18T08:17:49Z",
  "description": "An operations manual for retail point-of-sale excellence, where every transaction is a duet and every error is a chord in the song.",
  "metadata": {
    "wikidata_sources": [
      {
        "id": "Q386147",
        "label": "point of sale",
        "url": "https://www.wikidata.org/wiki/Q386147"
      },
      {
        "id": "Q330190",
        "label": "receipt",
        "url": "https://www.wikidata.org/wiki/Q330190"
      }
    ],
    "external_references": [
      {
        "source": "queuebuster.co",
        "endpoint": "https://queuebuster.co/",
        "context": "retail operations manual"
      }
    ]
  },
  "opening_protocol": {
    "thermal_head_temp": {
      "value": 165,
      "unit": "°C",
      "tolerance": 2
    },
    "paper_spool_rotation": {
      "value": 0.3,
      "unit": "rev/sec"
    },
    "transaction_target": {
      "min": 1.7,
      "max": 2.2,
      "unit": "transactions/min"
    },
    "green_led_pulse_count": 2
  },
  "fold_geometry": {
    "crease_width_mm": 28.67,
    "final_envelope_width_mm": 86,
    "target_folds_per_hour": 127
  },
  "error_handling": {
    "reject_rate_target": 0.004,
    "fallback_sequence": ["manual_entry", "checksum_verify", "override_code"],
    "pause_before_override_seconds": 1.3
  },
  "closeout_specifications": {
    "coin_sorter_rpm": 1400,
    "bill_validator_latency_ms": 42,
    "revenue_variance_max_usd": 0.47,
    "phantom_credit_recovery_case": {
      "amount_usd": 1.23,
      "date": "2025-08",
      "ceremony_name": "Ghost Dollar"
    }
  },
  "performance_metrics": {
    "morning_rush_arrival_est": "06:47",
    "first_batch_transactions": 47,
    "window_minutes": 25,
    "actual_tx_rate": 1.88,
    "q4_error_rate_actual": 0.0031
  },
  "audio_signature": {
    "tempo_bpm": 112,
    "reference_tracks": [
      "Dolly Parton — 'I Will Always Love You'",
      "Beyoncé — 'Freedom'"
    ]
  }
}