{"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-xadzhtla","versions":[{"created_at":"2026-06-11T01:39:31Z","element_count":84,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"632b3e6ad35a5e14bfdc87231cf1279b5c7fe91d33df35199edffb5b11574a57","version":10},{"created_at":"2026-06-10T23:21:15Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9cae11fcd711b258d4b5207d94351cd970ef6a6e929cc35eec650aea67f9407f","version":2}]}