{"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-l8s8exi1","versions":[{"created_at":"2026-06-10T22:55:26Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21306726 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"47c7502ab84fa821cc099dd26e7a3998723addf64d4b6a72e3082795b16335a2","version":10},{"created_at":"2026-06-10T18:13:35Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4cae9f269709afa9f57f7539fc29531cfb02cda22a0d618a2ed7383b481e86dc","version":3}]}