{"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-5yci3hzb","versions":[{"created_at":"2026-06-10T22:52:11Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→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":"304a2cd8b6f85131bde9c602c6aba3ecbf07019a997fa7f45b6b56161fdd74b6","version":25},{"created_at":"2026-06-10T13:15:28Z","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":10},{"created_at":"2026-06-10T09:37:54Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ac3def35b2dce9f8abc55cad3ec89b3f37493e0463fb4b36aceb21a9fd352484","version":2}]}