{"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-x30rner3","versions":[{"created_at":"2026-06-10T23:00:50Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"85151bec5a297b3d060536984252da1342746d6e1609ea92ecbfc2deec14d23d","version":9},{"created_at":"2026-06-10T21:44:02Z","element_count":72,"note":"5軸GA polish 52->97 by M5 (autonomous)","saved_by":"mcp","sha256":"cfcce6ed6c3e51b6a352fd6f90660a23b0f02334397c51ec42a183e0d49da678","version":3}]}