{"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-zhfvzqqz","versions":[{"created_at":"2026-06-10T13:26:07Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"157dc205a170e584d5e493420dc8772795e056267a0655a850828ad676647de6","version":9},{"created_at":"2026-06-10T11:26:44Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"ec3662abcaff140521abf1dd654eaf46e3918e4d065b5457c7251038a8855a4c","version":3}]}