{"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-gjnjvyo4","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21473216 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f7f1eba81169e987d2a42ac3e6148824a3d800f9cf4c0a8f068c9f385bf34ae8","version":17},{"created_at":"2026-06-10T14:29:49Z","element_count":83,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e7af4824afa847405b2d6064040260264c45290e8b3660ec4c8c2d0a8fc3e9e1","version":7}]}