{"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-bqh77txf","versions":[{"created_at":"2026-06-13T09:17:57Z","element_count":236,"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}]}