{"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-wzjx25tg","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20920518 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"15273048ec957c7eae0a76d8ac97fcb443cfa11526b2174f38e322e96ebd33d2","version":21},{"created_at":"2026-06-10T13:33:18Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"42953ddb9d392a8e7e67cec89ccfb88678d3f8f3fa6411994638b80566ac7043","version":7},{"created_at":"2026-06-10T12:31:45Z","element_count":85,"note":"5軸GA polish 55->98 by M5 (autonomous)","saved_by":"mcp","sha256":"aa72ed0aa7e454e5b721c4b7097f34981b8b68bace85130777727d75b900d7a9","version":4}]}