{"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-tuqijwx8","versions":[{"created_at":"2026-06-10T13:25:39Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"23247ee7df3269cd38fde9a922802476da9ec64f771184abecd2d5c9a93d9625","version":10},{"created_at":"2026-06-10T11:10:03Z","element_count":68,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"f0f0e7254ba1cb41296485a4a3e601a51a0b2561673ae641974b15372b087ff2","version":3}]}