{
  "step": "C383",
  "status": "completed",
  "date": "2026-09-24",
  "title": "Finite P/J source transport and moving-frame composition synthesis",
  "previous_certificate_sha256": "0b771231bc5813a363ed09842b41b9b9d45b6e21ffdc791fa26f7454b93797ef",
  "bindings": {
    "step": "STEP.json",
    "source_manifest": "SOURCE_MANIFEST.json",
    "report": "490d_C383_Finite_P_J_Source_Transport_and_Moving_Frame_Synthesis_20260924.md",
    "checkpoint": "490d_Mirror_Checkpoint_After_C383_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",
    "review_0": "evidence/ROOT_SECOND_METHOD.py",
    "review_1": "evidence/ROOT_SECOND_METHOD_RESULTS.json"
  },
  "step_sha256": "40e9c27b9898d0bd424aa79e4e480fe8d0dc6ae52331df8f81fff257732c0ffd",
  "source_manifest_sha256": "def493020d19c91008c883c22e7866660c104709424228cc42d5e94fabc76736",
  "report_sha256": "5b630aa80c1488aa8acf65d702e5cfc14bd33e8a876168be1ee7eec589a54457",
  "checkpoint_sha256": "60626b257105612fafefbc64e7880842c978569fb8546b912c49d06ad6064e4f",
  "data_sha256": "658d276026ef43f8b3c347e486914b223d7bf2333a668e73ce2b2b3949bbcfa5",
  "results_sha256": "a1bd6d84ccbed750194b2856fcc703dca1e02fbe4cc254d59bb22760936aa9d6",
  "calculation_sha256": "2c83b2f3b0840d47b5f97b1d4b3a440a1f6058205bea971b44632063cb0e0150",
  "verifier_sha256": "9f175670abb70f7819dd7f6d997ff0bef2e58df8dffd763b433f6c6cd62e332d",
  "next_step_decision_sha256": "a4c7c2009e68a83b3f1b0dc7a5258044451cddbf3e10258702a3c91fa1bc40fb",
  "replay_sha256": "35862706cf584932d5f945eacf25f0b7e3b18ec585bc601d1cf7cbfe1829b996",
  "control_integrity_sha256": "9810807cb07b02f43f568f68bb82cb41a6eeff6799902254b4932e5c350ac838",
  "readme_sha256": "baa8914c393196a4e7dbe057ada8368f426ccab6cf4da9b01e861cad123d1568",
  "review_0_sha256": "de2b598393cde553e25570ccb847c60648a98b0669f5093c2c59d078efa128b3",
  "review_1_sha256": "c7b70e3854f8bf105121da358f9d06aa53eda25a4f1d7e70402ff21b2fcd23e3",
  "assertions_passed": 75,
  "source_checks_passed": 61,
  "main_result": "C374–C383 complete. The paired two-year repairs preserve the original2K/17K outer corners but change the internal cross-span17K+138 to17K+142. Existing corner exchange conjugates P/J at source Flood pivots; typed MT membership excludes companion rows and fixed-sum exchange reverses phase. The exhaustive frozen Flood-pivot census tests240 cumulative and9120 regular ordered coordinate pairs: only signed scale−2 cumulative and+2 regular has complete common source support, giving six and four coordinate quadruples. The two extra regular configurations are minus215 translations; SP/LXX aliases preserve source identity, and only the original full430 i3/i5 pair retains17K. J-only299→300 edges form one SP Noah-death family but do not carry whole950 biographies. Common P/J source paths have at most three cumulative or two regular edges, requiring pivots to move with the gain. Paired continuation preserves2K and corner sums but raises cross-spans by4, so the original17K states are not closed. A precise composition law survives: P_(B+h) after J_A equals J_(A+h) after P_B exactly when B−A=230h. In translated frames both are dilations about the same existing source point. Six source squares and24 finite word routes verify the law; fixed pivots have defect±20/897. No global529-preserving action or source-prescribed pairing is established.",
  "limits": "The exhaustive statements concern only the frozen menus. Exact local composition does not establish a source-prescribed pairing, independent historical witnesses, unlimited source closure or a global529-preserving action. C384 is unexecuted.",
  "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": "Compare the moving-frame P/J composition structure with the existing Noah-held E=25/23 source ladder. Test a finite mixed diagram using only its already recorded pivots, endpoints, contexts and phases; determine whether a source-qualified commuting square exists and record any obstruction without changing anchors or Gear scope.",
  "next_step_executed": false
}