{"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-367nd76j","versions":[{"created_at":"2026-06-11T00:14:32Z","element_count":72,"note":"5軸GA polish 57->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b4903ea14745f5d1bd3dbd942afb4bcb0593138f524dc29b2b071b4a6d246fa9","version":13},{"created_at":"2026-06-10T23:10:10Z","element_count":50,"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":"1d93f1d90803510240390637af6d19e5a5405068e8c3df929a5518170f990bc2","version":7}]}