{"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-viqqzf3c","versions":[{"created_at":"2026-06-26T07:05:11Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"dbf2760f7721b765b91165a5a3a72180573debe21d868347abed9b6ff2e77828","version":3},{"created_at":"2026-06-26T07:00:36Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8218d899e6cd40a343b7aa3af62cc210fd9d5f09b9556ece6173065045bc0a9b","version":2},{"created_at":"2026-06-26T07:00:36Z","element_count":90,"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}]}