{"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-5zlxs1hw","versions":[{"created_at":"2026-06-10T23:00:17Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20370449 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c0ba1452d284c678e23233984e857ab53539623af4687f5188e1e0f82efb3b56","version":9},{"created_at":"2026-06-10T21:11:42Z","element_count":74,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1cd438389949b6c87d36bc0e2d680a6166eb1e0ea1e9915ba6411e68b4a9ca85","version":3}]}