{"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-3axhz6jd","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21038603 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8b3ac2783e4ae275c9099ae35a5d9d7a5d5c0943ae21a62d1c4c5f0613b9df5c","version":17},{"created_at":"2026-06-10T14:29:45Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7bb4fd984acd840fd58cc56e44390fd30750db403aeb7f0ef5a4d32dfe43e2f5","version":7}]}