{"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-lqt221tp","versions":[{"created_at":"2026-06-10T23:00:49Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22600161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bb1c4f73cd8c93653f5f7e301374dd4364137d31d94ec28249780fb36a396b69","version":9},{"created_at":"2026-06-10T21:44:05Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9c653309c71246b62a507184703a3db01d2867b35e682a47e699e84dbd59f5d1","version":3}]}