{"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-rushmeadhouse-m8vbhmfn","versions":[{"created_at":"2026-08-14T16:23:04Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d28193f81c44eb4ac84cde7ba959d7f6eb50bcc10e7c4e7f4f8258dd32ed573e","version":2},{"created_at":"2026-08-14T16:23:04Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}