{"id": "c1254", "title": "C1254 — Reconstruct the whole regular displacement staircase", "filename": "C1254.md", "role": "Research action", "step": 1254, "sha256": "c256b00998589d675b40b9f907d253206c2edba12db77ddd9a4ca39efdf776c1", "bytes": 1280, "origins": ["C480–C1634/Research_Cycles/C1132_C1431_Recovered/journal.json#C1254"], "download": "/sources/c256b00998589d675b40b9f907d253206c2edba12db77ddd9a4ca39efdf776c1.md", "format": "md", "derived": true, "tags": ["Regular"], "excerpt": "Do thecentury support masks explain every boundary behind1250 and650?", "content": "# C1254 — Reconstruct the whole regular displacement staircase\n\n## Question\n\nDo thecentury support masks explain every boundary behind1250 and650?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"C1182\",\n  \"C1253\"\n]\n```\n\n## Opened utc\n\n2026-09-28T05:45:28.122335+00:00\n\n## Results\n\n```json\n{\n  \"staircase\": {\n    \"path\": \"model/regular_kernel_complete_staircase.json\",\n    \"sha256\": \"dbf847b6bd763d2c10d8dbc1144a44d7e89fc83c8597def0302bc4bacf8f66d1\",\n    \"bytes\": 863\n  },\n  \"field\": [\n    1250,\n    1150,\n    1050,\n    950,\n    850,\n    750,\n    750,\n    650,\n    650,\n    650,\n    650,\n    650,\n    550,\n    450,\n    350,\n    250,\n    150,\n    50,\n    0,\n    0\n  ]\n}\n```\n\n## Finding\n\nThe named row masks generate the whole20-boundary1250-to650-to0 staircase. The600 drop beforeNoah is the sum of six located century changes; the650 plateau is the shared post-Flood contribution.\n\n## Reassessment\n\nRestore nativeCainan and check that its support is a partialfieldchange.\n\n## Checks\n\n```json\n{\n  \"field_expected\": true,\n  \"recurrence\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T05:45:28.122809+00:00\n\n## Record provenance\n\nExact record hash: `51f2670a249422df989754b6c32ec0df916ab7d23a61ef2136789912d27daf54`\n\nSource journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`", "journalDownload": "/sources/6adb632ce171623c2bce60d7ed58ae319ccb379cf76b751c0a477c1742fd348c.json", "evidenceLinks": [{"id": "d-dbf847b6bd763d2c", "title": "model/regular_kernel_complete_staircase.json"}]}