{"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-bp3lwwkp","versions":[{"created_at":"2026-08-17T16:27:00Z","element_count":119,"note":"言葉から生成: 中庭ロの字 / 中庭のある回遊動線・ロの字 / 吹抜 / 霜取り設備 / 庇(除雪) / 間接照明 / 回遊動線","saved_by":"mcp:create","sha256":"","version":1}]}