{"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-nbtgf0ec","versions":[{"created_at":"2026-07-13T10:09:58Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8950c160aab37b5e420c27e64654b67e3e6d108ec35518de10b299cc3d89c0cb","version":3},{"created_at":"2026-07-13T10:00:20Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"acd54daada3c032aa0885a8ec7e3a7b383ff7881d70e8d301abb941a558661b2","version":2},{"created_at":"2026-07-13T10:00:20Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}