{"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-akancalderacompactho-gsk9ivj9","versions":[{"created_at":"2026-09-22T00:28:25Z","element_count":116,"note":"言葉から生成: 薪ストーブ・土間・ロフト","saved_by":"mcp:create","sha256":"","version":1}]}