{"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-southstreetlodgehous-0aixgco1","versions":[{"created_at":"2026-07-25T18:25:50Z","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":"69ecbb58b67551cc93e91565ddf5b75b16c7c3e921dbdec09d5750d7d33aacd5","version":2},{"created_at":"2026-07-25T18:25:47Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}