{"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-0wuf2fap","versions":[{"created_at":"2026-07-08T06:05:45Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"65556aa0ceb63571ac39dc30e08f7f3cc19c62537cdedf4d6ee4e0568f941918","version":3},{"created_at":"2026-07-08T05:56:07Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b61ac3b468ec8a66416a00790d0412c94144e90a8cf708b7363a91459bfdde2e","version":2},{"created_at":"2026-07-08T05:56:07Z","element_count":126,"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}]}