{"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-jk105q6j","versions":[{"created_at":"2026-07-22T02:06:39Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9c710c43d1b508d7e7ed7da2378389c06f0fe8ac8770b2f9d925f052e2d57879","version":2},{"created_at":"2026-07-22T02:06:39Z","element_count":88,"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}]}