{"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-b7mzpj0w","versions":[{"created_at":"2026-06-13T20:46:42Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d088e48f9106b6f1e530d1aa238d95da55415bed1b790e0180e3133d3d1c1989","version":3},{"created_at":"2026-06-13T20:29:34Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"022ee0bc4c370d61d553b2bbe2f2bf6a5056df0888397803e7f0466f4cd6a50b","version":2},{"created_at":"2026-06-13T20:29:33Z","element_count":90,"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}]}