{"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-2ftgycgj","versions":[{"created_at":"2026-06-13T20:00:19Z","element_count":88,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b5849400160f1fa77e105443760b494b30f3245fdb8c022253e9ccbe64d17b7d","version":3},{"created_at":"2026-06-13T19:41:48Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6885ae3f23da957a556fd90ee88d1f986f5c4b27148b924b3560fb7cae2d668b","version":2},{"created_at":"2026-06-13T19:41:48Z","element_count":101,"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}]}