{"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-teshikagalow-risepre-293oqcw9","versions":[{"created_at":"2026-10-22T23:16:38Z","element_count":111,"note":"言葉から生成: 1LDK + 薪ストーブ","saved_by":"mcp:create","sha256":"","version":1}]}