{"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-willowbrookhouse-lds15o4s","versions":[{"created_at":"2026-07-31T04:26:04Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"15c09a3bebf8337f9af8929875df2e03b063819f471585846f72bf1cd95ecefa","version":2},{"created_at":"2026-07-31T04:26:04Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}