{"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-ny9bqsx9","versions":[{"created_at":"2026-08-04T19:49:08Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8c51e533520b14e7fe214fe804b4b6f36c1b8919d14e64c68907ef215f3a36fd","version":2},{"created_at":"2026-08-04T19:49:07Z","element_count":101,"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}]}