{"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-eh7yp3u3","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19108634 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1950fd9690dd37537bf593b6147b07421112e17106eb8353d8ab99ae4aeb4194","version":19},{"created_at":"2026-06-10T13:55:18Z","element_count":72,"note":"5軸GA polish 65->96 by M5 (autonomous)","saved_by":"mcp","sha256":"07a0ba0c16f86f7073b00eb808de250c55358466a51599389325360a2939ff7c","version":6},{"created_at":"2026-06-10T13:46:09Z","element_count":50,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"c4257273b42f22cd80a21e7c59d404622d0ac23f0c30216f18e9ae0550bdf605","version":5}]}