{"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-wembleyriversidebung-o3vgnkhy","versions":[{"created_at":"2026-06-23T09:00:56Z","element_count":83,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"9bcaa47b965cf0350b2fa0ed59b89eba4671cf85ddf1836965af6e8442a1b4df","version":3},{"created_at":"2026-06-23T08:48:22Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4c0d4f583e1398103c18cdda0bf616f0f33c8ac3fb169b8a2e2529fe7cc79048","version":2},{"created_at":"2026-06-23T08:48:22Z","element_count":88,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}