{"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-udc2z1m6","versions":[{"created_at":"2026-06-10T23:39:56Z","element_count":83,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c82edc78badff1a5eebe14cbf393f9713e446201589f40df1969a5c1d1d7af70","version":11},{"created_at":"2026-06-10T23:09:10Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"acf846e4a75d6fd7901ad9f753aa7f168facb2b80b8f149f5242d640aa8aa45a","version":7}]}