{"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-33nu80v6","versions":[{"created_at":"2026-06-13T21:22:40Z","element_count":101,"note":"言葉から生成: L字 / 越屋根のある自然素材の家・通風重視 / 越屋根 / 吹抜 / 庇 / 高架床 / 南面大開口","saved_by":"mcp:create","sha256":"","version":1}]}