{"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-rvn54imb","versions":[{"created_at":"2026-06-27T06:11:03Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"44d7349074360233aefd8d5a18579aa53c6602682ba7440a81079782997da06e","version":3},{"created_at":"2026-06-27T06:05:11Z","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":"8971e17844b84d293821c8e477a5544f2c0c270aac1dd5eecaa9c9b1a4e87601","version":2},{"created_at":"2026-06-27T06:05:11Z","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}]}