{"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-rurfnsoz","versions":[{"created_at":"2026-06-11T01:22:34Z","element_count":74,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2869ba01466ec8cfd49b4b52b3c40156b2ecc350fe00b8fa5c8d5d2d2b62ccd1","version":11},{"created_at":"2026-06-10T23:05:27Z","element_count":44,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3a8ccb64df95fd55d334ead0f87717db9d58fe4bb9494435c2d4ca6974f69b16","version":2}]}