{"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-pjcpu70y","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20833288 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7546c27409c71eabd59d8515a041c24fc30d3e4cfb860e900514fe4df3af5f65","version":12},{"created_at":"2026-06-10T15:37:00Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6feef45a1341f7b2dde231fe69faca2a125bee6e801071df2ffce768ddc93be3","version":4}]}