{"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-lv45nznr","versions":[{"created_at":"2026-06-10T22:54:12Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy48570969→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"978abae3850703f699662293220f4d8670711b735e50dd647cf77abed4313e90","version":10},{"created_at":"2026-06-10T17:23:15Z","element_count":84,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"c7f79e13570ca37e3672223d72b77e6511b86cdbcf33ee3e2f32d4a9c99f0af0","version":2}]}