{"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-0tcjcy25","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"17278dd965202ed5f77971b19512c52f614ad6781c52c92cdff4633e2c295e72","version":3},{"created_at":"2026-07-13T09:40:11Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"84a7308478a4e5a1a54568bd40d67c2b8ce041955649ac8a3e50795cb1acd7ae","version":2},{"created_at":"2026-07-13T09:40:11Z","element_count":89,"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}]}