{"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-wgerpksi","versions":[{"created_at":"2026-06-11T01:56:37Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2d46d8d66d546fcbd2d057fbfb8ee6454fbc27ff545b6f1487034a5d2f319166","version":8},{"created_at":"2026-06-10T23:53:28Z","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":"b37cb552924be36622d8d4e1ea64e35e139d80052de49344b431db4e5b2c240a","version":2}]}