{
  "step": "C398",
  "status": "completed",
  "date": "2026-09-24",
  "title": "Plus215 transport of the E/P/J loop to the17K branch",
  "previous_certificate_sha256": "c09c59a665befc732bfad638b00665000a5bc64cff1f28508a1ab6d027ce2e50",
  "bindings": {
    "step": "STEP.json",
    "source_manifest": "SOURCE_MANIFEST.json",
    "report": "490d_C398_Plus215_Transport_and_Original_17K_Loop_Boundary_20260924.md",
    "checkpoint": "490d_Mirror_Checkpoint_After_C398_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": "ad9578592905163d3de69539bfe21c91326a696ebcb9ab5669a016aaccaa9c4f",
  "source_manifest_sha256": "333d142f6e7bea32963d71bf6bbc3ff1d12c1b55ecfdd80844c4fe4a2eb75b18",
  "report_sha256": "afdb1aa549aee52114e46d0e0df3e558bca257195f762899b18c513bb7173133",
  "checkpoint_sha256": "6daa0972b4200663f19c1889bc65542ec8dc9270a6556a605697c9cb077fa2b2",
  "data_sha256": "5156a09718bb1b0e657bc67d88115640c3659e7efdf4a3d284cdf79bd149e381",
  "results_sha256": "5a173df97501cafae30be192b6b1c0b582c18529f9c1cef8bb305473dc5b524d",
  "calculation_sha256": "124aa453795c9966ee0231bc2bfec8ac6f3e18dbab9aac576d302ed9e3c7ff42",
  "verifier_sha256": "9f175670abb70f7819dd7f6d997ff0bef2e58df8dffd763b433f6c6cd62e332d",
  "next_step_decision_sha256": "66a1d3cd9cd533d2fcc2f4d61a4ea0f583b0101d4b07a91b499d744d7ed3bb67",
  "replay_sha256": "4af2cfb68d134f8d674e48d770ddf4799a76ae1170ea332955bc9b33b8850dc2",
  "control_integrity_sha256": "9810807cb07b02f43f568f68bb82cb41a6eeff6799902254b4932e5c350ac838",
  "readme_sha256": "9a45a10f586d96c6a41a5f0d60d95a42a735d279e0ebd7f74c47e574e788b5de",
  "assertions_passed": 18,
  "source_checks_passed": 15,
  "main_result": "The two lower-branch P/J repairs translate+215 to the original17K configurations, but the unique E return pivots3271/3273 are absent. Retaining the old pivot leaves430/23 error. The held E Noah already occupies full4301; no phase choice supplies its translated source.",
  "limits": "The positive loop and original17K rectangle use distinct held/outer Noah roles. Diagnostic translated coordinates are not source additions or new epoch anchors.",
  "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": "For all ten admitted common P/J coordinate edges—six cumulative and four regular—solve the unique E return pivot and check the appropriate frozen source menu. Derive one signed formula for the return-loop geometry and state its complete source-supported domain.",
  "next_step_executed": false
}