{"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-pncjlc5u","versions":[{"created_at":"2026-06-10T23:06:19Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9d639e8f56d5b4719c03fa402d1a7cadd4e546c72497d01477cdcee81338809f","version":9},{"created_at":"2026-06-10T22:35:04Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"c0a2f907567e87969f33fea24f0d45c9e1e711d0862559f06bc92cb76d8fb302","version":6}]}