{"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-atw39huz","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote22616301 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c6ff468fea368ca5336139655c794ac16b30629c104ff8afd8de0863da7178e2","version":13},{"created_at":"2026-06-10T15:19:44Z","element_count":69,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1d55fb60671a1be077008eab85e70b0c09bd08f0fd9b12f3e86b1385e0120020","version":5}]}