{"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-4kkk31gk","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20894368 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7a5be7fdbd15db3ef50d22995159b6f3e3ad9440f71c2af53a25ea770bb4c7c1","version":15},{"created_at":"2026-06-10T15:02:20Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8618a51640950186ee3b19f097e42fdb513b7ed487620ab713fc655bcb09a4a7","version":6}]}