{"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-jrrb2vc4","versions":[{"created_at":"2026-06-10T23:00:19Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20954809 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c800043eb715837342d53fcb1887b4247e1560a270beb44fc12648395e801c7a","version":9},{"created_at":"2026-06-10T21:11:45Z","element_count":72,"note":"5軸GA polish 52->97 by M5 (autonomous)","saved_by":"mcp","sha256":"73e9a538eac5efe327640c812056601cb0c8d2a756e88730505166937ca3abdc","version":3}]}