{"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-2n3vvqzb","versions":[{"created_at":"2026-07-27T02:19:49Z","element_count":105,"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(屋上縁側) / 吹抜(十字通風) / 縁側(南面) / 庇(軒先2.0m) / 断熱等級6","saved_by":"mcp:create","sha256":"","version":1}]}