{"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-oqqcsu47","versions":[{"created_at":"2026-07-03T19:29:29Z","element_count":68,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"abc3dec8ba8d0cc4a4ad4169f3d4b00d2751bd1584246d8a3f61deb7fe18dbd5","version":3},{"created_at":"2026-07-03T19:26:19Z","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":"65caf450112305e6f7066108b59beadc286f2630886987802717ebcb73151aa3","version":2},{"created_at":"2026-07-03T19:26:18Z","element_count":126,"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}]}