{
  "step": "C420",
  "status": "completed",
  "date": "2026-09-24",
  "title": "Fixed-pivot harmonic endpoint tests of the five 2K stations",
  "previous_certificate_sha256": "bc4b685d4cc6e3806c6dc563ed2faa6cd76c32dd840332d3ba3f6b9b1d30a9d1",
  "bindings": {
    "step": "STEP.json",
    "source_manifest": "SOURCE_MANIFEST.json",
    "report": "490d_C420_Fixed_Pivot_Harmonic_Endpoint_Tests_of_the_2K_Profile_20260924.md",
    "checkpoint": "490d_Mirror_Checkpoint_After_C420_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": "b6f0570ced5f09a69661957dd324dd4feae51507dd7f7453ec0cd2b5e8b1ebe7",
  "source_manifest_sha256": "9b2725089914b7a71d9eb460186a8daeebad615560e3f7d75397a682e8804a04",
  "report_sha256": "8f53dae1938c920267f07c8f52eb894678db7802f51264d51765dce01b71d109",
  "checkpoint_sha256": "61c971af994f06bb472e01dc2935044af888dc03cb0797b7c263d8d513824159",
  "data_sha256": "b5bfb5d097159ee20d7018d79abf123b8e08d25d0835bb159c1827aedb89c1c6",
  "results_sha256": "335b7551b4bcd44fcace4980cd057313f08cbbd6ad57b1b1014eed408e775f59",
  "calculation_sha256": "aefe6cd578ed98c01be31d2ca6c9e70e286250a9a57aa05614f5d57fd0222bf4",
  "verifier_sha256": "9f175670abb70f7819dd7f6d997ff0bef2e58df8dffd763b433f6c6cd62e332d",
  "next_step_decision_sha256": "649d4d904ab167fff96078b6c40fd0024995bc3ba190877bd9ecfad6be98ada3",
  "replay_sha256": "52e2b1000b759ad2a093c284442f2058cbab79d384b37f23aba29fc90a27201a",
  "control_integrity_sha256": "9810807cb07b02f43f568f68bb82cb41a6eeff6799902254b4932e5c350ac838",
  "readme_sha256": "8ba74d018942b7aab70cc0b91788932f727c255d1564151629c3c46dcf79a4b6",
  "assertions_passed": 35,
  "source_checks_passed": 14,
  "main_result": "Acrossfivefixed2K stations×E/E²/P/J, onlyoneof20outputs is sourced: holdingSPcompNoah3899, E² mapsMTNoah2841 toMTG3 C1/T1/F1 Floodclose2649. E intermediate2749 is absent; allfiveE outputs andfourotherE²outputs are absent. P/J outputs are nonintegral. This is a newcontext endpoint comparison of the old1058→1250 scalaridentity, not a complete E ladder.",
  "limits": "An endpoint hit is not a source-prescribed transformation or a path. No missing intermediate, extra rail, new pivot or calendar interpretation is inserted.",
  "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": "Determine whether any two sourced E pivots, or any finite positive E/P/J word with the same whole-map slope, can realize the new held3899 squared-E map while keeping an admitted intermediate. Use exact affine algebra and the fixed regular coordinate menu.",
  "next_step_executed": false
}