{"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-willowbrookhouse-mrw9rs5m","versions":[{"created_at":"2026-06-15T19:48:13Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b405eece49a670564947735700e196d5d00f2f23157508224309ee00ff8b94db","version":3},{"created_at":"2026-06-15T19:39:14Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d0900c1ac2341680814e4bf0bf924ca1d80af669f067cb964bb94d5c465a5da2","version":2},{"created_at":"2026-06-15T19:39:14Z","element_count":88,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}