{"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-newroadhillhouse-699wz6tm","versions":[{"created_at":"2026-08-14T23:08:24Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2bdfbe2386060c9cbd8a4b93a21d5a732bdc62330b9cc78469ebf5a38874aed1","version":2},{"created_at":"2026-08-14T23:08:23Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}