{"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-t20ttheg","versions":[{"created_at":"2026-06-10T22:55:14Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7fd509d99561f4c2f98d4f8a67c54561e5b946da1417f6cc73a121b904d365d4","version":10},{"created_at":"2026-06-10T18:13:17Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e5b2419e5ee1b9f02c0fa2db383fa621a9ad922beccd7bb8bead76c56197cf36","version":3}]}