{
  "after": "C301",
  "chosen_next_step": "C302: verify complete600-year source bindings among the point matches and record exact annual coverage and its gaps.",
  "reason": "The new endpoints could form genuine Shem lifespans; matching both endpoints with the same Gear, rail and frame is the necessary next check.",
  "next_step_executed_within_this_step": false,
  "effort": "High sufficient",
  "limits": [
    "The selected context is conditional on the fixed comparison.",
    "Coordinate aliases are not independent matches.",
    "Point matches alone do not establish a full biographical path."
  ]
}