{"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-willowbrookhouse-9xdbjddn","versions":[{"created_at":"2026-06-10T22:52:04Z","element_count":85,"note":"legacy fix: jpy90050184→quote21063708 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0396e88565df1a6ba3dc4626e915a48d7082af8190a9d435df2858bc4581ce76","version":26},{"created_at":"2026-06-10T13:11:22Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"ff2a49e0317cef56e20a2842c92724ea3d962725d7b54dd56e2bc3bff3865bf3","version":11},{"created_at":"2026-06-10T08:15:47Z","element_count":91,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cec33e8d1186c1f41d801aa4f6242f4b0f384eb9d2bde26471acfac8978052ad","version":2}]}