{"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-bd8in1g8","versions":[{"created_at":"2026-06-10T22:50:03Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20168591 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"748427ec1a2753f51dd87ee710f6f08973cbf97a4bd7655ae82981fca47d28b3","version":25},{"created_at":"2026-06-10T13:07:54Z","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":"ecb25cf1e0d34bf9098174b3f64aa347a840e591701f51ec17c38517f99508f2","version":11},{"created_at":"2026-06-10T07:25:38Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"92756cc64270b9a633d3d0f1bdb29ce4f65e11993af4c91dc15ab54052258b15","version":2}]}