{"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-aqamflrg","versions":[{"created_at":"2026-06-11T03:57:31Z","element_count":85,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"225410950e299f0b3f63dc65f9402fc042c740d9197ec678e5963a52c44917dc","version":3},{"created_at":"2026-06-11T03:52:06Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"465898ed856be92eb426a85135fd226a1ddac8eddafd9f00c447319373485b37","version":2}]}