{"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-b2p09p0u","versions":[{"created_at":"2026-06-10T22:58:27Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy40475808→quote19954947 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f7ff64c02ffe5ee09d7c66ff17222a3b96d2f5966c58bcd1053d93b60397c6d4","version":9},{"created_at":"2026-06-10T20:07:22Z","element_count":83,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"a1c6a911850a8dc2ad8e76614ac1b22dd66a6138287e68b0e9366e22129a010c","version":2}]}