{
  "step": "C273",
  "status": "authored dependency classification; not an independent-event count or formal minimality proof",
  "claims": [
    {
      "id": "I01",
      "kind": "source input",
      "title": "Selected cumulative fields and the frozen regular event register",
      "claim": "Cumulative MT ON, SP OFF and LXX OFF envelopes; admitted regular Noah/Shem/Flood records retain their source selectors.",
      "requires": [],
      "sources": [
        "FILE_18.md",
        "FILE_09.md",
        "C266_ENDPOINTS.json",
        "C01_RESULTS.json"
      ]
    },
    {
      "id": "I02",
      "kind": "coordinate convention",
      "title": "Fixed Mirror and phase representation",
      "claim": "Global M(x)=−x about January AD 1; integer center pairs have actual components x±1/4; no civil year zero.",
      "requires": [],
      "sources": [
        "C266_REPORT.md",
        "FILE_09.md"
      ]
    },
    {
      "id": "I03",
      "kind": "declared placement",
      "title": "Inherited cumulative translations and joining conditions",
      "claim": "MT/LXX Flood 5290, Shem 5888; SP Flood 4715, Shem 5313. The MT closing join, common MT/LXX Flood shift and SP/MT interval reflection are declared construction conditions.",
      "requires": [],
      "sources": [
        "MIRROR_COMPREHENSIVE.md",
        "MIRROR_BILATERAL.md",
        "C266_REPORT.md"
      ]
    },
    {
      "id": "I04",
      "kind": "comparison convention",
      "title": "The 1000:1 local display",
      "claim": "eta(x)=1000(x−1) compares local distances with macro radius labels; it is not a source chronology operator.",
      "requires": [],
      "sources": [
        "C266_REPORT.md",
        "AXIS_REPORT.md"
      ]
    },
    {
      "id": "I05",
      "kind": "retained source relation",
      "title": "The sourced 17K closing correspondence",
      "claim": "C 269 recovers the Shem closing edge and C 254 Flood closing route, with source and graph status kept distinct.",
      "requires": [],
      "sources": [
        "C269_REPORT.md",
        "C269_PATHS.json",
        "C269_GRAPH_INCIDENCE.json"
      ]
    },
    {
      "id": "I06",
      "kind": "retained source relation",
      "title": "Two 13K expansion chains",
      "claim": "N 02/N 04 use anchors−4419/−4417 and widths 6877→7475→8125;299 midpoints sourced,325 midpoints generated.",
      "requires": [],
      "sources": [
        "C01_RESULTS.json",
        "C268_REPORT.md",
        "C268_CORRESPONDENCE.json"
      ]
    },
    {
      "id": "I07",
      "kind": "calibration condition",
      "title": "Map the local junction and inner component to the retained chain",
      "claim": "Phi(1)=a; inner radius 23/4 maps to width 6877 or 7475, fixing scales 1196/1300.",
      "requires": [],
      "sources": [
        "C268_REPORT.md"
      ]
    },
    {
      "id": "D01",
      "kind": "derived identity",
      "title": "The 600/598 residual gives local reflection",
      "claim": "Source separation 600 and translation increment 598 give H=F−2 and RH=J1(F), J1(x)=2−x.",
      "requires": [
        "I01",
        "I02",
        "I03"
      ],
      "sources": [
        "C266_REPORT.md"
      ]
    },
    {
      "id": "D02",
      "kind": "derived geometry",
      "title": "Central 14 and selected 5/6/7 radii",
      "claim": "The typed fields supply 5+1+1+5+1+1=14 and selected SP/LXX/MT radii 5/6/7.",
      "requires": [
        "I01",
        "I03",
        "D01"
      ],
      "sources": [
        "C266_REPORT.md",
        "C266_ENDPOINTS.json"
      ]
    },
    {
      "id": "D03",
      "kind": "derived geometric classification",
      "title": "The marker roles remain different",
      "claim": "2500 is a generated midpoint radius;5750/6250 are LXX components;5000/6000/7000 are selected center radii;7500 is whole seasonal-envelope length in this comparison.",
      "requires": [
        "I02",
        "I04",
        "D02"
      ],
      "sources": [
        "C267_REPORT.md",
        "C267_CLASSIFICATION.json",
        "C267_ENVELOPES.json"
      ]
    },
    {
      "id": "D04",
      "kind": "derived source comparison",
      "title": "Closing 600-by 8993 rectangle",
      "claim": "Shem−5883→SPFlood 3110 and Flood−5283→SPNoah 3710 give the retained same-translation rectangle, including 598+2.",
      "requires": [
        "I01",
        "I02",
        "I05"
      ],
      "sources": [
        "C269_RECTANGLE.json",
        "C269_REPORT.md"
      ]
    },
    {
      "id": "D05",
      "kind": "induced map",
      "title": "The 7K Noah shift and regular Flood map",
      "claim": "Composing the inverse 17K translation with the fixed cumulative maps yields RN=y−3703 and RF=3105−y;3703=17K−10K=7K.",
      "requires": [
        "I03",
        "D04"
      ],
      "sources": [
        "C270_REPORT.md",
        "C270_MAPS.json"
      ]
    },
    {
      "id": "D06",
      "kind": "finite source correspondence",
      "title": "Six admitted radius families",
      "claim": "Correct same-Gear bindings give j=2 g+1−c and rho=2 g−c; six matches among 36 pairs; cumulative indices 2–7 only.",
      "requires": [
        "I01",
        "I02",
        "D05"
      ],
      "sources": [
        "C271_REPORT.md",
        "C271_FAMILIES.json",
        "C271_COVERAGE.json",
        "C271_RESULTS.json"
      ]
    },
    {
      "id": "D07",
      "kind": "calibrated comparison",
      "title": "The 1196/1300 charts",
      "claim": "The fixed fits connect the local outer bracket to the 299/325 midpoint segments, changing seasonal components into target centers.",
      "requires": [
        "D03",
        "I06",
        "I07"
      ],
      "sources": [
        "C268_REPORT.md",
        "C268_CORRESPONDENCE.json"
      ]
    },
    {
      "id": "D08",
      "kind": "equivalent constraints",
      "title": "Outer 25/23 and shared stage endpoint are one condition",
      "claim": "The equations(4 rho+1)/(4 rho−1)=25/23 and 104(rho−6)=0 both selectrho 6 under the fixed charts.",
      "requires": [
        "D06",
        "D07"
      ],
      "sources": [
        "C271_REPORT.md",
        "C272_STAGES.json"
      ]
    },
    {
      "id": "D09",
      "kind": "retained finite exclusion",
      "title": "The inner families add no target matches",
      "claim": "The 72 fixed images give 10 hits representing 8 inherited target records, all at radius 6;62 images stay generated within the held register.",
      "requires": [
        "I01",
        "D06",
        "D07"
      ],
      "sources": [
        "C272_CLASSIFICATION.json",
        "C272_LIMITS.json",
        "C272_RESULTS.json"
      ]
    },
    {
      "id": "D10",
      "kind": "conditional determination",
      "title": "The translations are fixed if the declared joins are imposed",
      "claim": "MTclosing equality with h=f+598 gives f=5290,h=5888; the prescribed global MT/SP interval reflection gives SP 4715/5313.",
      "requires": [
        "I01",
        "I02",
        "I03",
        "D01"
      ],
      "sources": [
        "MIRROR_BILATERAL.md",
        "C266_REPORT.md"
      ]
    },
    {
      "id": "L01",
      "kind": "assessment",
      "title": "The strongest unresolved link is selection of the construction",
      "claim": "The retained evidence does not independently force the declared placement/display/calibration conditions as a common source chronology rule. Connected paths are established; equality of their translations with the large-scale affine charts is explicitly false.",
      "requires": [
        "I03",
        "I04",
        "I07",
        "D07",
        "D09",
        "D10"
      ],
      "sources": [
        "C266_REPORT.md",
        "C268_REPORT.md",
        "C269_OPERATORS.json",
        "C272_LIMITS.json"
      ]
    }
  ]
}