{"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-40e2ld73","versions":[{"created_at":"2026-06-13T16:42:47Z","element_count":84,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"226e90cec9563e280a85302b5f58abb6c0add6dccd688220dd58c871fd350a46","version":3},{"created_at":"2026-06-13T16:39:28Z","element_count":86,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"085c38f6a5e72183a51e3bccf4ca760a3ded18b0cd054f96d9af8c6435fbd9f3","version":2},{"created_at":"2026-06-13T16:39:27Z","element_count":86,"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}]}