{"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-3fhq10g8","versions":[{"created_at":"2026-06-11T00:31:36Z","element_count":89,"note":"5軸GA polish 62->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8d4e9d86cb2a4e96543a81e14ad0575fcd14854d04176103e9550dabde7aacc0","version":15},{"created_at":"2026-06-10T23:10:14Z","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":"deb0560448503336274acc9af1254d63fc7a7832c4cd289f6a9d1ee6a4bb6118","version":7}]}