{"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-6uudw2ey","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19740953 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"927411a32b39bf558f324a341d276a78b005ba251d67f4cc409e851994094bbf","version":21},{"created_at":"2026-06-10T13:33:20Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"d0e7500d0db456f72797132275e86e2fbaba136fc20c40270faa7b42474b19e4","version":7},{"created_at":"2026-06-10T12:31:46Z","element_count":69,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7a04269dccfd9dafdf01f15e8a5776c83c196b78e33c7b2b6a3c697601d9dea9","version":4}]}