{"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-zobs6mxx","versions":[{"created_at":"2026-06-10T22:54:20Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20065976 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e5c100a09d147f33b24308e5a6a0f126d8072a9bb09187fb7c298dfef5d22eac","version":10},{"created_at":"2026-06-10T17:39:29Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"968949364226d081c054ab14dfdb9f8c171c355f476b3e38bdeb84f20cac6764","version":3}]}