{"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-b5py83eu","versions":[{"created_at":"2026-06-10T22:55:56Z","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":10},{"created_at":"2026-06-10T18:29:54Z","element_count":74,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c0794cff604d906b3e2ba5d0886cf55d3de2b45f4337813560580f89e9dcdcb5","version":3}]}