{"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-x1g282cl","versions":[{"created_at":"2026-06-10T22:58:18Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy40475808→quote19847721 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ed95c34023c4129c4f17ea565a68e173fb3181b503a0cb3fe452ac620b03fef1","version":9},{"created_at":"2026-06-10T19:50:36Z","element_count":84,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"5c63518826136e7018abb6e0d013a493d4c4de45659cd31c9669c978c10f82c7","version":2}]}