{"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-7z008siv","versions":[{"created_at":"2026-06-10T22:52:04Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21268722 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"603872d67da7230410aa7ce0bc99b8ee67194bd2521a5a404af4dd965cfd24df","version":26},{"created_at":"2026-06-10T13:11:51Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"03234912453bce44f308d20df520c20f5181d917c62b221bc1213b2b74b30609","version":11},{"created_at":"2026-06-10T08:33:07Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6a5a334261c3eee7fb85c41d28042e42cad34eec24af234fe91d8c85fcc6cbbc","version":3}]}