{"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-bfs1sp87","versions":[{"created_at":"2026-06-10T23:56:57Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"478c39a73ed863dbbe5c660322e3f3eeae2fe862c448b815d52f5edc91bfcf0f","version":12},{"created_at":"2026-06-10T23:09:39Z","element_count":47,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f768b786493c6d8fd9a0e684df42fa245ce56a75defa7c1979624d37c70a6ea5","version":7}]}