{"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-vm5clq4m","versions":[{"created_at":"2026-07-31T02:37:24Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c7e9e3b1e8a3942a28801a22f910f721142fec37d9df9d3f24cfc490cb461e77","version":2},{"created_at":"2026-07-31T02:36:49Z","element_count":119,"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}]}