{"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-xnua9r6j","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20835511 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"90c390c782b33fafe1e8fb92babc5457a4c63104d3dc8c7afcacde14e848522b","version":16},{"created_at":"2026-06-10T14:45:59Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4efda8c463977045ee0d24e92f4843779bcd0edb70e59a4b351d28ef9720adb3","version":7}]}