{"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-5mjt3a35","versions":[{"created_at":"2026-06-10T23:00:14Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→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":"603eb0c539723b91d322878f537a56308e38b379e31ce54262735111186e4ad3","version":9},{"created_at":"2026-06-10T21:11:12Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"836b0b4640f5c5343dca3301392c34c4cd3395cedce6816b40033bace390d39e","version":3}]}