{"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-lacl51my","versions":[{"created_at":"2026-06-11T04:11:25Z","element_count":72,"note":"5軸GA polish 39->90 by M5 (autonomous)","saved_by":"mcp","sha256":"45c0fe68ffb78079be6183b1bb709970cd45acb4f386a1196db5b19c91ff72a1","version":3},{"created_at":"2026-06-11T04:05:11Z","element_count":119,"note":"loop3: 設計時延床 42.8㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4d6b8452ad70351f69df0b0dc502e9e572da3653379db8f04808673908e38102","version":2}]}