{"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-k9yo4016","versions":[{"created_at":"2026-06-10T23:00:01Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f739eaa0eccddbb9cb115559f323aeacd42a2cc7c0e5bcb0024c8b7b7c50ad9d","version":9},{"created_at":"2026-06-10T20:54:17Z","element_count":85,"note":"5軸GA polish 59->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5067d5ad1ee7715bdb71dd39c55be2d9d4c85c32fd5ec333dd790c5060577b94","version":3}]}