{"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-fmmmk42u","versions":[{"created_at":"2026-06-10T23:00:53Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19954947 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"11c898d3e571155cfbf96fa1306c535f8c72db2dd249c69bd2bc65de0103a334","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":73,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2b53609d7b9010856061a520cd35b6e0d9c980767936c4301aac1583798a3850","version":3}]}