{"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-i7u6jne8","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"31ffee8587945e726ea6bfb02d97cb82ee7965e585651e864539de7ca81653a4","version":16},{"created_at":"2026-06-10T14:46:08Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"95700d15c91cce7526fb6254e6dea86da3a8fb816139ee85318d54bf5396191c","version":7}]}