{"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-ymj1bxj1","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20762394 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5573afbd8e85dc1e7e4f57c914c64de3eeb6515592fb57a2959500e1e71ae5b5","version":20},{"created_at":"2026-06-10T13:34:59Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"b663a9ddc809097fec5c82d3c11646dc782da12bff08bcb63f4206c12b4beda3","version":7},{"created_at":"2026-06-10T13:06:05Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7a5fefa8955c53935873e7701b86825645e78a1ad266dc608bf06c640e61b81c","version":4}]}