{"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-9159tqm6","versions":[{"created_at":"2026-08-14T14:38:33Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"56776d646260f6e3888b93d76724f1b9279e7f97f7d4aa7db2db815bb32ec7e8","version":2},{"created_at":"2026-08-14T14:38:33Z","element_count":126,"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}]}