{"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-1pgphfid","versions":[{"created_at":"2026-06-13T16:04:13Z","element_count":84,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"a4dac7d842feedab0ea362aa5abb6819248f36ce99b241e2720f484aa0279738","version":3},{"created_at":"2026-06-13T15:54:29Z","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":"1d70102b81db2ef4026f61e00a75ca247346798c4ebe3e31c438d65a2359fd8c","version":2},{"created_at":"2026-06-13T15:54:27Z","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}]}