{"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-27brmlc5","versions":[{"created_at":"2026-06-10T22:50:52Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21235936 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c7d6d4f019f5f97db8bfe5bec9388b4567ae938d8631dc152eeae17e3b5240de","version":25},{"created_at":"2026-06-10T13:09:10Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"acac9ab6d4c65518a65d3526a351fbb64cc64f7c0bad48790834152ea69f7079","version":11},{"created_at":"2026-06-10T07:41:55Z","element_count":91,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c9307d4c4a4e95ec10629ca0d92323d32e1609b3a711b10f5ed37abc00719bab","version":2}]}