{"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-2-agnxhl24","versions":[{"created_at":"2026-07-01T10:33:52Z","element_count":145,"note":"言葉から生成: 中庭ロの字 / リモートワーク2部屋・庭に面した在宅オフィス","saved_by":"mcp:create","sha256":"","version":1}]}