{"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-c2sx3krg","versions":[{"created_at":"2026-06-10T22:52:29Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote22666392 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"52d6d473d88c6f4c0c6e01e5feedeb8b9072c56821dd20357f72684945d3524b","version":22},{"created_at":"2026-06-10T22:00:59Z","element_count":54,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"989f52615993acee263d39043971d00bb7c974dde0bfb50028dde5beb58eb4e3","version":16},{"created_at":"2026-06-10T13:34:13Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"1d9a1be1afd03a1ad33c31335d8f50d77b168e3c5b367108f4496629318d7fe1","version":8},{"created_at":"2026-06-10T12:31:47Z","element_count":74,"note":"5軸GA polish 58->96 by M5 (autonomous)","saved_by":"mcp","sha256":"54191ad93a7dfc096e2dba33271308a80b2644db99f1c8a8bd8146c3bf4893a7","version":4}]}