{"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-ds4d0yi2","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote24047756 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a1e8e1fb43980c05e6a6acd9dcb1f38de90d13ca03827a3c8153ddf3c5380490","version":15},{"created_at":"2026-06-10T15:03:44Z","element_count":84,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a3a1e0714f6be42688625e72742172658f47917676935ad53c03361d67810df1","version":7}]}