{"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-q49p53td","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→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":"748427ec1a2753f51dd87ee710f6f08973cbf97a4bd7655ae82981fca47d28b3","version":19},{"created_at":"2026-06-10T13:55:45Z","element_count":90,"note":"5軸GA polish 66->98 by M5 (autonomous)","saved_by":"mcp","sha256":"33b969f017e9688bced80ff42df4f2ab3ab7f5bc51f330dccd4d9ccebde384a8","version":6},{"created_at":"2026-06-10T13:45:56Z","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":5}]}