{
  "step": "C272",
  "date": "2026-09-24",
  "authorization": "Dean: Proceed after the C271 fixed-chart comparison proposal",
  "domain_fixed_by": "C271 report and checkpoint before C272 calculation",
  "positive_families": "C271 source-qualified rho1..6; x=1+rho+delta; delta=−1/4,0,+1/4",
  "charts": {
    "formula": "Phi_s,a(x)=a+s(x−1)",
    "scales": [
      1196,
      1300
    ],
    "anchors": {
      "N02": -4419,
      "N04": -4417
    }
  },
  "image_instances": 72,
  "target_domain": "Frozen C01 48-record reflected regular Noah/Shem/Flood pair-center register, exact signed BC_Nisan coordinates as reflected centers",
  "classifications": [
    "all source matches, preserving record identities",
    "generated outputs absent from held register",
    "image-instance versus distinct-record counts",
    "same-anchor adjacent-stage endpoint overlap and midpoint status"
  ],
  "excluded": [
    "No absolute-value matching or automatic reflection",
    "No wider historical register or endpoint search",
    "No new anchor, scale, offset, Gear or phase reassignment",
    "No cumulative/upstream Gear, graph or canonical source edits",
    "No C273 calculation"
  ]
}