{"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-q1a1lqxd","versions":[{"created_at":"2026-06-11T04:11:20Z","element_count":91,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"2f9c26f34f7feea877325503dc796264d75c9d3aa617e9f27934beb18bb473a1","version":3},{"created_at":"2026-06-11T04:06:57Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f00b3f6170d8011677e88e7e5cb26f9e2be241ddbd194fb8b0c9b1aa64c63d49","version":2}]}