{"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-dh3ufsdu","versions":[{"created_at":"2026-06-10T22:55:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20556188 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7d6af0365a717c844346855688dd4c40b4237e258005d348652cf2eefb52a170","version":10},{"created_at":"2026-06-10T18:13:42Z","element_count":70,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a6344d8ad59e988f45cef19029ecf949d3202f240da7d0593b14d80cccfec910","version":3}]}