Prompt (rr-iter2-002): Edit the routing phase README to document the new corpus file layout.
Expected Gate 3: true

Classifier output:
{
  "triggersGate3": true,
  "reason": "file_write_match",
  "matched": [
    {
      "pattern": "edit",
      "kind": "token",
      "category": "file_write"
    }
  ],
  "readOnlyMatched": []
}