{"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-tuag7gwy","versions":[{"created_at":"2026-07-06T15:24:32Z","element_count":82,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"f00aa9567fa3ed89e4f98d36e8808e67fce54237d107786c9888876837b78030","version":3},{"created_at":"2026-07-06T15:21:19Z","element_count":86,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d864cc99ba656bf7640bd956c99d794cd8104307c5289ba2dc5f5a6e7caefa9d","version":2},{"created_at":"2026-07-06T15:21:18Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}