{"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-3uieff6w","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6893eea848e6b3619bc49c6710703e36071012572ed685783a5d705bc3d5d1e2","version":3},{"created_at":"2026-06-15T06:10:06Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2d8d9bb933005534d1e62e016096e26139fe8441e86285067cbf8e377cc362ac","version":2},{"created_at":"2026-06-15T06:10:05Z","element_count":105,"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}]}