Thanks, that one took me a while to appreciate too. Matching hooks for the same event run in parallel, so there's no ordering between mine and someone's own Stop hook, and nothing in my tool depends on one. Mine only reports and never returns a decision, so it can't change what theirs does; the cost is a curl to localhost. The case to watch is a user Stop hook that exits 2 to send Claude back to work: mine has already reported Stop, so the pane shows "Your turn" for a moment until the next PreToolUse flips it back to Working. Treating the latest event as the truth handles that, and the phone notification waits 20 seconds and only fires if the session still needs you, so that flicker doesn't buzz anyone.

Latest event wins plus a 20 second wait before the phone buzzes is a clean split: the pane can be twitchy, the notification can't. Have you thought about giving the pane a short grace period too, or is that brief Your turn flash useful as a signal that a Stop hook pushed Claude back to work?