{
  "after": "C291",
  "chosen_next_step": "C292: solve all equal-spacing translations of the same source pairs, without choosing a new bridge.",
  "reason": "The positive16K interlacing needs a specificity test: equal spacing may admit other translations or different orders.",
  "next_step_executed_within_this_step": false,
  "effort": "High sufficient",
  "limits": [
    "Translated source landings are generated positions, not new AD events.",
    "The sixteen-K relation is derived from the seventeen-K correspondence.",
    "Two lower rows remain incomplete."
  ]
}