{"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-h32djn6h","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote23104426 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"45161bd08d2474ec28cd93c7608876991134f8b323b52ddcead4ca310aa000b9","version":16},{"created_at":"2026-06-10T14:45:54Z","element_count":71,"note":"5軸GA polish 52->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d9f375e82fac750ec3b22a748e7d16507371204b389c296ea8eaab02d5dcf972","version":7}]}