{"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-ydx50k7w","versions":[{"created_at":"2026-06-10T22:52:34Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20898438 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"304d39edfe76d596b716e2cc94ad850aa23956bceeacab335248ed7f680d9cfd","version":19},{"created_at":"2026-06-10T13:45:15Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"27d5c39f29d8a21c254858222794a6bfde74b5537f842d04d6d555940fe60695","version":6},{"created_at":"2026-06-10T13:21:59Z","element_count":69,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"4d92e91e31b33d55016cdb98bcad5e4345a4a50c0d6500ec77570af95ed991d6","version":3}]}