{"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-uvrfhgsr","versions":[{"created_at":"2026-07-13T19:41:39Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8c427a6f8363e902042af5736fecb2aa449acfa36e1eef859ff1e1e2e828982b","version":3},{"created_at":"2026-07-13T19:28:23Z","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":"1cc11f4f0b327c341620fc9f5dd676c588e32f94cd625465c66698080957eff7","version":2},{"created_at":"2026-07-13T19:28:23Z","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}]}