{"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-8wjjl3tz","versions":[{"created_at":"2026-06-30T06:19:43Z","element_count":90,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"311fc77e1020ceaf9a2f15de32c0dc3d3db479fe32a800cf6796b2cf66e508be","version":3},{"created_at":"2026-06-30T06:06:05Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"674a50f796a5ee6c0bd85181e459462e95db036f2ea36b28975ae3877a41d1e3","version":2},{"created_at":"2026-06-30T06:06:05Z","element_count":105,"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}]}