{
  "step": "C377",
  "status": "completed",
  "date": "2026-09-24",
  "title": "Ancestry and lifespan limits of the299-to300 edges",
  "previous_certificate_sha256": "57405893d17a484f161693de537286ba925eb6d1b5f7fcde5a66e5ec3049adda",
  "bindings": {
    "step": "STEP.json",
    "source_manifest": "SOURCE_MANIFEST.json",
    "report": "490d_C377_Unit_Gain_Noah_Death_Ancestry_and_Lifespan_Limits_20260924.md",
    "checkpoint": "490d_Mirror_Checkpoint_After_C377_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": "e8cc64c5d98414d0b733dd2a5942842c935158c23778e86788d55f799ca2964c",
  "source_manifest_sha256": "50fa606c70f9d774b88ac20a2ded28d1b6d96d0bc86907ea2dd2278e0555c743",
  "report_sha256": "050967c8521bd0423893c15d46241c6209ff0d92ec1879a5a2c87be5a64cbc32",
  "checkpoint_sha256": "7ef8b82ffa1744b7abddbf71c73dc75be2c2140ede18e5a3b40de0327a90ef2f",
  "data_sha256": "f986a0ed4430dfe4508f4b0e46ddb5d5c5c03f84003b58b9334e78feb96b77b7",
  "results_sha256": "87be35406a7d8454351cfac4aabacb0189d8db756f77c89168f77cd8c4fd7675",
  "calculation_sha256": "4b65d8e82c3c1a7c56c5aad825ec16d0f53ec372982b968440356b6573a5de32",
  "verifier_sha256": "9f175670abb70f7819dd7f6d997ff0bef2e58df8dffd763b433f6c6cd62e332d",
  "next_step_decision_sha256": "934514f0b829fcae9835acf8405e952c2f7dff9a433161eb221864066a9fb40e",
  "replay_sha256": "9eecdee26e775e7ccc6e3f489ed7df51886706b34bd037c91a17970476297593",
  "control_integrity_sha256": "9810807cb07b02f43f568f68bb82cb41a6eeff6799902254b4932e5c350ac838",
  "readme_sha256": "2efbe85c978fee296230f0960bb0251f9c5c993392acce3a446f46bd901a15b7",
  "assertions_passed": 26,
  "source_checks_passed": 15,
  "main_result": "The J-only299→300 sequence is one restored SP Noah-death family with alternating admitted primary/companion states. Translation+1 preserves each950 biography; the anchored J map misses its matching birth by950/299. Neither the selected P pivot nor the cumulative source menu extends these edges.",
  "limits": "One-year SP source transport is not a new general chronology operator. Coordinate aliases, a changing Flood pivot and biography stretching remain explicit. All Gear use stays at Noah/Shem/Flood.",
  "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": "Exhaustively test all ordered pairs of already registered Flood pivots, separately in the cumulative and regular menus, for a common nontrivial P/J image whose input and output are both existing source records. Use the exact intersection formula and retain all source identities; do not adopt new pivots or mix contexts by default.",
  "next_step_executed": false
}