{
  "step": "C270",
  "date": "2026-09-24",
  "status": "completed",
  "title": "The regular SP counterpart of the LXX seasonal bracket",
  "previous_certificate_sha256": "775e17d1627d7670dc431eee50a594cf1071a937e69f54190d1f4aaa8efe392f",
  "source_manifest_sha256": "b49f78bfbff0f2abe544ad8dada01f36005fb5a444a5ecae9f4ded8a31f6388a",
  "report_sha256": "f5df1bddb3409367b818b314569bacbc212b6f1ea7956d4dde3c601b61f05b12",
  "checkpoint_sha256": "7e8118665dd39b069a94f386abdc364b6846a9d1af4840c3002f7105a674eb88",
  "results_sha256": "ea7ec9223426673e60b3f450b5b69ec41f90fe48cd0e3da4cb8baf93182c8a72",
  "replay_sha256": "e6e7fe7a82d3c5bb03ce9050f821b72f36f7300b6df1ad301364f551705afab3",
  "control_integrity_sha256": "12e0976f68ba736e5f5bcbf3cca6ae086446e5ec7ed7757a440c0f5f4e17289e",
  "assertions_passed": 111,
  "replayed_output_files": 6,
  "regular_Gear_scope": [
    "Noah",
    "Shem",
    "Flood"
  ],
  "controls_modified": false,
  "graph_modified": false,
  "new_source_event_identities_asserted": false,
  "main_result": "Derived regular SP maps R_Noah(y)=y−3703 and R_Flood(y)=3105−y reproduce all four LXX local closing phases at signed 5750/6250 markers; 3703=7×529; actual half-year spacing and source lineage are preserved",
  "scientific_limits": [
    "Dependent transport of inherited C266 maps and C269 source correspondence, not an independent witness",
    "Uniqueness is conditional on the fixed inherited maps",
    "Branch roles cannot be replaced by a common phase-preserving affine map",
    "No wider three-Gear comparison or C271 work performed"
  ],
  "next_proposed_step": "C271",
  "next_step_executed": false
}