{"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-ezx7hvwb","versions":[{"created_at":"2026-06-10T23:01:06Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote22379006 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1aef644728dd80c9b4d6934fa750b301def959714d66e6e70e4b7646fff32016","version":9},{"created_at":"2026-06-10T22:01:13Z","element_count":72,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"087fd5737ade98811fa836a1eca60207f4df920d35a313f265400fddf5631d1f","version":3}]}