{"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-jsr3nj6r","versions":[{"created_at":"2026-06-10T22:49:03Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote23314543 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"854376f853706a8b7bb0eb7d2148c675080669fcca624902ec81a52ead54de87","version":25},{"created_at":"2026-06-10T13:06:47Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"227cef239abb540b3e36d91771acf0ba41d0d119d1636441a8a43af67da3362e","version":11},{"created_at":"2026-06-10T07:25:39Z","element_count":89,"note":"5軸GA polish 59->98 by M5 (autonomous)","saved_by":"mcp","sha256":"1c2ea5b6ea22489b48eaab2883fb13657bcaf47c3c2f5898a57ce674e086e4bc","version":2}]}