{"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-00sy58pm","versions":[{"created_at":"2026-06-19T06:02:17Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e835823c0441a9bf6aea8eca311691e236016787b6f42f0017a2f9887d14a849","version":3},{"created_at":"2026-06-19T05:54:44Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d3eb0f74f2a56f1e70b4c49915a5eab7b5bd111739e48949615d2bfd4004b27e","version":2},{"created_at":"2026-06-19T05:54:43Z","element_count":87,"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}]}