{
  "after": "C290",
  "chosen_next_step": "C291: apply the existing8464=16K translation to the four-node pattern and test its relation to the retained regular endpoints.",
  "reason": "The dilation boundary is settled. The supplied16K bridge preserves phase widths and differs from the source17K correspondence by exactlyK, making it the strongest immediate connection to the axis report.",
  "next_step_executed_within_this_step": false,
  "effort": "High sufficient",
  "limits": [
    "Center coincidence is weaker than physical-pair transport.",
    "Per-row anchored dilations are not one global affine map.",
    "The negative extension result leaves the exact scalar identity intact."
  ]
}