{"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-bh86cwc2","versions":[{"created_at":"2026-06-11T00:14:36Z","element_count":83,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ab88f5cfa03e789ddd267bb19c18066aba6fe6cfad0c0d23f474b29bdae95844","version":13},{"created_at":"2026-06-10T23:09:57Z","element_count":54,"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":"861983afccd8e102ec30bf7f9193d8e513a8d758ed5429ca8ffcb4d32fcea92f","version":7}]}