{"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-8pg2cix0","versions":[{"created_at":"2026-07-05T06:02:57Z","element_count":89,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"7c61021dcf19324e251e0b3638c1ad115eeda26652e0533b0e0410372c8d52cf","version":3},{"created_at":"2026-07-05T06:00:25Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0a393e17e05dbd8372897438fcaa395c318191b70bdf86c685ce3fdc1d8e6f84","version":2},{"created_at":"2026-07-05T06:00:25Z","element_count":101,"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}]}