{"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-willowbrookhouse-gfn0wxjs","versions":[{"created_at":"2026-06-10T22:54:02Z","element_count":85,"note":"legacy fix: jpy87379776→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"581dbad9841b5a51f590a0eb7e733caa23968827f5e1b2b064d62b381de0d871","version":10},{"created_at":"2026-06-10T17:23:27Z","element_count":85,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2652e7ee418324d7e0290e1f5395602535ffb339bafb0a49089c53057ea6f4ee","version":2}]}