{"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-53gf1sbh","versions":[{"created_at":"2026-06-14T06:20:27Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"8112a8b41965f20edd13b77a3b5462adb52c16c68959263ffa900c407473ad7f","version":3},{"created_at":"2026-06-14T06:10:40Z","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":"3a18291a85b5e6724e3753bda2a65dbe3266e8129a16031d171b7e9e4ecc43b3","version":2},{"created_at":"2026-06-14T06:10:37Z","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}]}