{"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-49tzyora","versions":[{"created_at":"2026-06-11T04:11:19Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4a6cb222ff283933181da5f09958136e15d432276ac0fd857d0c0e8882d8746c","version":3},{"created_at":"2026-06-11T04:01:24Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"067fda91ba747f7da4ddef71132763228e8d436ab1f947d320d1966c8ee28130","version":2}]}