{"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-ff40a4kb","versions":[{"created_at":"2026-06-10T22:52:36Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20168591 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"304a2cd8b6f85131bde9c602c6aba3ecbf07019a997fa7f45b6b56161fdd74b6","version":18},{"created_at":"2026-06-10T13:55:49Z","element_count":72,"note":"5軸GA polish 66->97 by M5 (autonomous)","saved_by":"mcp","sha256":"da053521fd3ce8f08757d1e0777ec2f22cd7b050b08d36d331bb3e8c56e0afdc","version":5},{"created_at":"2026-06-10T13:46:47Z","element_count":54,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"d3b781dbf261af8f29f2867992bd83db73d4bceeab2e7bf743a12a174545f6d9","version":4}]}