{"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-qgks892j","versions":[{"created_at":"2026-06-13T14:35:21Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"87e4b2d2225f15977114dcf236d21776802bc9dfd89abaf2a19c25d540b08139","version":3},{"created_at":"2026-06-13T14:21:15Z","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":"5867a0696a7bca90ce7dee50cb354f82e2d032de793b1eab69c4b394d526f12b","version":2},{"created_at":"2026-06-13T14:21:14Z","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}]}