{"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-el7ggypc","versions":[{"created_at":"2026-06-10T22:57:40Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote22379006 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0b9418d90932cfee1dd5f9c5b38cb21a404c6ad9bd480cc4ae5ccc3c9e2248a5","version":9},{"created_at":"2026-06-10T19:34:23Z","element_count":83,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"0bfbd93bbff06e6646201a31272f1d7147a7d1ee5a37fde2056701637f0e3888","version":2}]}