{"id": "c1316", "title": "C1316 — Record the SP cap-to-rectangle reconstruction", "filename": "C1316.md", "role": "Research action", "step": 1316, "sha256": "f8b5eb8dbb30b0ec385e092eec417e572d061ad86a5d6d70c7f8bebdf936de4a", "bytes": 1073, "origins": ["C480–C1634/Research_Cycles/C1132_C1431_Recovered/journal.json#C1316"], "download": "/sources/f8b5eb8dbb30b0ec385e092eec417e572d061ad86a5d6d70c7f8bebdf936de4a.md", "format": "md", "derived": true, "tags": ["Regular", "Cumulative", "Rounded"], "excerpt": "How do source rows supply the two rectangle radii?", "content": "# C1316 — Record the SP cap-to-rectangle reconstruction\n\n## Question\n\nHow do source rows supply the two rectangle radii?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"C1223–C1230\",\n  \"C1314\"\n]\n```\n\n## Opened utc\n\n2026-09-28T06:19:24.601864+00:00\n\n## Results\n\n```json\n{\n  \"reconstruction\": {\n    \"path\": \"model/reconstruction_SP_rectangle.json\",\n    \"sha256\": \"dd41f7bc5f8672c7eba7c95dfba5fedc79d2b64af31a7c043988f7c3b11d059c\",\n    \"bytes\": 1557\n  }\n}\n```\n\n## Finding\n\nThe rectangle now has a continuous source-to-result explanation: located SP losses supply its cumulative radius while located age changes supply its Regular radius; the source wrappers close the equal-gain relation.\n\n## Reassessment\n\nWrite the Rounded Moses reconstruction entry.\n\n## Checks\n\n```json\n{\n  \"contract\": true,\n  \"loss_sum\": true,\n  \"evidence\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T06:19:24.602643+00:00\n\n## Record provenance\n\nExact record hash: `9165997117872d563ec62702a4b8a52be67331a002a2d3065a83dd5598f51959`\n\nSource journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`", "journalDownload": "/sources/6adb632ce171623c2bce60d7ed58ae319ccb379cf76b751c0a477c1742fd348c.json", "evidenceLinks": [{"id": "d-dd41f7bc5f8672c7", "title": "model/reconstruction_SP_rectangle.json"}]}