{"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-8vv51itk","versions":[{"created_at":"2026-06-10T22:52:01Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy70091322→quote24269040 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cba29bd910ef7bc83d898480774b6c5bec69a81a42916dbe4f1857da5b95bde8","version":26},{"created_at":"2026-06-10T13:10:26Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"74b1c66b49525b35311ff9474e847654d59716a33ce0a88538f870a54e8cb5d2","version":11},{"created_at":"2026-06-10T08:15:45Z","element_count":90,"note":"5軸GA polish 52->98 by M5 (autonomous)","saved_by":"mcp","sha256":"265107ea9b79dc4f25b27f34b0111d7c526301f48a1bece86bd3d79253acbc47","version":2}]}