{"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-iz7opblh","versions":[{"created_at":"2026-06-13T17:09:27Z","element_count":70,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"ad08a325dd61b1afe233fff338f7d7fb65d5baaaeb6bf66c885defbe52fc5957","version":3},{"created_at":"2026-06-13T16:55:35Z","element_count":122,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"774e0b49b68113390694fba37520754380c4670b31591c5d1d07f37c69bd4b04","version":2},{"created_at":"2026-06-13T16:55:28Z","element_count":122,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}