{"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-k7sehwx1","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21031370 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3271e4fc02644991593e9bef790dfbc70fecbc2584c8f0646ef9b2155e6f6a66","version":15},{"created_at":"2026-06-10T15:02:55Z","element_count":73,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a93a877493a545c9c94e0c60b74b11f617b05733202e6b48f77bdc2672bfc997","version":6}]}