{"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-nyb4mzx8","versions":[{"created_at":"2026-06-10T23:07:13Z","element_count":73,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote27287714 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0df018a471d41bff6b1a80415731f2eb63880f36690b6a2defdfe43bd50f1137","version":9},{"created_at":"2026-06-10T22:52:04Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c8a6708521c73b5896269410a642b517c9e9970eb70c5213e3476159add2190b","version":8}]}