A hive marks an agent updating when StopForUpdate stops its running container and clears it when the tail Reconcile or Start settles it, success or failure. The flag rides in the agent status snapshot (absent when false, so older readers and documents are unchanged), the status publisher sends a change at once instead of at the next sweep, and the swarm UI card shows an updating badge.
The swarm UI reference links the try-out section by its heading, and drops a
pointer to a hivectl section that never existed along with the sentence that
claimed hivectl sets the hive's limits. The turn-loop index links the
persistence reference's /harness/paused heading by its real slug.
The page-by-page and control-by-control description of the swarm UI moves to
4-implementation/web-ui/swarm-ui.md, with the quick-links wiring. The handbook
page keeps the route table, how to reach the UI, who may and what the browser
keeps. Links to the moved sections point at the new page.
