{"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-7ow145tv","versions":[{"created_at":"2026-06-19T06:02:27Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"65556aa0ceb63571ac39dc30e08f7f3cc19c62537cdedf4d6ee4e0568f941918","version":3},{"created_at":"2026-06-19T05:53:46Z","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":"882c1efc1b91025717fa2119d3e8c01110915964f556524cd5a151616b4355f1","version":2},{"created_at":"2026-06-19T05:53:46Z","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}]}