{
  "source": "Manual timing during gameplay",
  "observed_seconds": 4,
  "precision": "Approximate; subject to reaction-time uncertainty",
  "event": "Shield charge / startup",
  "deadline_timer_units": 1791,
  "pit_rate_hz": 500.07544006705785,
  "predicted_deadline_seconds": 3.581459628890863,
  "difference_seconds": 0.4185403711091369,
  "interpretation": "Same general timescale, not an exact match; display start/end landmark and manual timing uncertainty unresolved. No clock constants changed."
}