{
  "step": "C418",
  "status": "completed",
  "date": "2026-09-24",
  "title": "Flood-boundary closure and obstruction of the 2K person profile",
  "previous_certificate_sha256": "cbf6412090ea29de995ba5c9a6b38fae241dd22fdb44bb13dc06d6b05ae1fc6e",
  "bindings": {
    "step": "STEP.json",
    "source_manifest": "SOURCE_MANIFEST.json",
    "report": "490d_C418_Flood_Boundary_Closure_and_Obstruction_of_the_2K_Profile_20260924.md",
    "checkpoint": "490d_Mirror_Checkpoint_After_C418_20260924.md",
    "data": "evidence/DATA.json",
    "results": "evidence/RESULTS.json",
    "calculation": "evidence/CALCULATION.py",
    "verifier": "evidence/check.py",
    "next_step_decision": "NEXT_STEP_DECISION.json",
    "replay": "REPLAY.json",
    "control_integrity": "CONTROL_INTEGRITY.json",
    "readme": "README.md"
  },
  "step_sha256": "8f6ab37bed4e6aafc5297bf6918d0990adb62f31c230d843e915c5e2c56f68d5",
  "source_manifest_sha256": "ea430978e867b061a33ee3d967bbd5b3345a74b7a111de2f77c6a6934a7e8f30",
  "report_sha256": "0e6bf320493244e0bf8de4b85cada59ec52cd8669f23cbca98019b4a709ccb81",
  "checkpoint_sha256": "adbbc344050c3d92cb5d804512d1a9f8e4a61b86f921f0021e7673d23f4a2d75",
  "data_sha256": "adbb80729171541ccb581c8a77051726497442ff3c1cd37c5c1aaea2098fbfc9",
  "results_sha256": "5e6e29024eedbdd064093194701cf4cab99d043b7855930f87f404e77d1334f2",
  "calculation_sha256": "0057ce085e118ac5b3d501d5d43302e577b06f43799c9d8f889866886ace2fb7",
  "verifier_sha256": "9f175670abb70f7819dd7f6d997ff0bef2e58df8dffd763b433f6c6cd62e332d",
  "next_step_decision_sha256": "3b742953d1cca40287bc65496249a7884f5d493b1731dcf397fa314921ec3f3a",
  "replay_sha256": "c7612684eff6207eef32461672a595f527d8a0245eaa67c89857b66d985385a5",
  "control_integrity_sha256": "9810807cb07b02f43f568f68bb82cb41a6eeff6799902254b4932e5c350ac838",
  "readme_sha256": "07875b550883f86a38a7f940494eaa6342f1f9fa17dac8cd027aa09b2fdedeb8",
  "assertions_passed": 23,
  "source_checks_passed": 15,
  "main_result": "The unique person2K profile gains a fifth station at SPclose3299/MTstart2241, yielding a shared500+100+350+150 partition. Like-named Flood boundaries differ1059 at selectedGears. All18 same-boundary comparisons across availableeventGears fail1058 by parity; three mixed-boundary hits exist but onlycloseG3/startG1 retainsbothselectedGears. Translation maps SPstart3300 to MTG2close2242, so it does not map a whole same-Gear Flood year.",
  "limits": "A source-coordinate image is not automatically the same event, Gear or modal binding. The18 event controls do not enlarge person Gear scope or establish a general negative result outside their fixed variants.",
  "canonical_or_graph_edits": false,
  "new_independent_agent_review": false,
  "review_provenance": "Root-agent analysis and deterministic replay; no new independent-agent review",
  "next_proposed_step": "Test the five established2K station pairs against the existing17K cumulative Shem/Flood joins and the already admitted Mirror corner exchanges, using only the frozen cumulative source register and no fitted new axis.",
  "next_step_executed": false
}