{"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-7200u5l7","versions":[{"created_at":"2026-06-10T23:01:16Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote24826628 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"af646740141d0239e6e0389dc02eb28ca34a4d9752e77cd4387fad02bb7db274","version":9},{"created_at":"2026-06-10T22:00:42Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5d482f874be15ea5548cc1ae7d1ec3f8fa186523262e757d14f1aabd809656ca","version":3}]}