{"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-zdtwkhs1","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote23387862 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8c06b790d77e3f46854ddfce2a64a8536ce315860661950a8eabf81f2d5ab734","version":20},{"created_at":"2026-06-10T13:34:51Z","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":"6aa55deb55b1d078fa6395c9c211d99cedaeed73663029d033cc5603e321d6b8","version":7},{"created_at":"2026-06-10T12:48:19Z","element_count":85,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cec5540e69d264918fb25d0ed725e92eb0db20f5c7e0e6256c6ca06639674fff","version":4}]}