{"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-qluiryvn","versions":[{"created_at":"2026-07-30T07:42:58Z","element_count":86,"note":"loop3: 設計時延床 68.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7018b87e5dada280d2d16bdfe36d2f6f6f86881793a0e8456708596654e571e2","version":2},{"created_at":"2026-07-30T07:42:58Z","element_count":86,"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}]}