{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-0u6evfmk","versions":[{"created_at":"2026-06-11T01:05:16Z","element_count":83,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"16b7d794d1f20e303d0074a5c7a921aeb50d076a5259c7d77fca364b5a78d2a6","version":13},{"created_at":"2026-06-10T22:19:32Z","element_count":47,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ccb132a9af0ae81fc95e78052ce365b900755e85b8f8cd92ba0591ebb2ccd13f","version":2}]}