{"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-hbsivxs5","versions":[{"created_at":"2026-07-17T14:13:53Z","element_count":88,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"930cb83b21ef41a47324c1ae8efacd0f4c48b35ec153ecbfad1769c925ac4266","version":3},{"created_at":"2026-07-17T13:58:27Z","element_count":83,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1e5dea5cd6eea7eb70b3479a43df7350be62d9120535937bdc47eef5790621fd","version":2},{"created_at":"2026-07-17T13:58:27Z","element_count":83,"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}]}