[
  {
    "id": "dc-orange-eastbound",
    "operations": [
      {
        "op": "reverse",
        "replace": "r400284:0",
        "source": "r7919600:0"
      }
    ],
    "reason": "Feasibility named patch: r400284 has only 17 stops; reverse the complete 26-stop r7919600 direction. No new rail edges invented."
  }
]