{"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-vnl9b6y4","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→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":"2ea6fcbb2ff6d384ad9cdd3e493372f60e84d84d110485cfd549b2cfee4c6866","version":12},{"created_at":"2026-06-10T15:53:06Z","element_count":83,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7d4c1ecddcf1e77efd81ca00286db4ad1972fec430397ff7b23a019c5eb30dbe","version":4}]}