{"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-wdc2agpm","versions":[{"created_at":"2026-06-10T22:51:06Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20303104 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"006dd4653a32367c7f6183892ae78f6f834e7c9527b6b2a3d84435af69ed0b2e","version":25},{"created_at":"2026-06-10T13:09:29Z","element_count":85,"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":"86e0c22dab5d3f123b683f21a1fe085a4f1558711b30dd74fc06adea7fbb4809","version":11},{"created_at":"2026-06-10T07:59:12Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df50209fb447878aff5f64499106d3c72301623af53131754c8048c031b22896","version":2}]}