{"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-iwuah31h","versions":[{"created_at":"2026-06-10T22:58:28Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy50039783→quote19805192 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"981b6fd028ccb1734c8de43ec47866ec0574ddf4c73d6192084d9d19be01765d","version":9},{"created_at":"2026-06-10T20:07:33Z","element_count":90,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e307e8498e2fc2efa6c9d588e4b47fa13519f43a5d7efed8c7c3f89ff2ce7f4e","version":2}]}