{"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-bmbope0i","versions":[{"created_at":"2026-06-11T00:48:13Z","element_count":72,"note":"5軸GA polish 47->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2785d1237d123e83c8fe795d406148e75078b4e20739a58ef9940565d19e535d","version":15},{"created_at":"2026-06-10T22:01:50Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"68d8a063b00911f7a9a33874a533c37c2ee74acbf714608eacae1a45ae68b8e3","version":2}]}