{"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-s9tvjves","versions":[{"created_at":"2026-06-10T23:07:08Z","element_count":72,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote24963288 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"73d81b6cca4876da237f6ffc54c9f1cd6b1be9001156aac4fee01b60ded14abf","version":9},{"created_at":"2026-06-10T22:52:02Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"04533fb40efd01d95658f40b77cd59a0cf0066cdd871e9a42adb5d489a996c63","version":8}]}