{"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-xirycxpx","versions":[{"created_at":"2026-06-10T13:13:42Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"49d31939f6559776e517590610b85dd579b032a88d2d350993061212397719fd","version":10},{"created_at":"2026-06-10T09:05:38Z","element_count":72,"note":"5軸GA polish 53->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a65460a4fff7aa7eaa843454c674025c113946dcdae3a07e07088e7b4179e650","version":2}]}