[nitpick] After the restart is triggered and the cooldown timer is set (lines 51-55), the consecutive timeout counter is reset to 0. When three more timeouts occur (lines 61-63), the counter reaches the threshold of 3 again, but restart isn't called due to the cooldown check.

However, the consecutive timeout counter remains at 3 after line 64. When time advances past the cooldown (line 67) and the test triggers three more timeouts (lines 70-72), the counter would go from 3 to 6, not from 0 to 3.

This works in the current test because the implementation still triggers a restart when _consecutive_timeouts >= TIMEOUT_THRESHOLD, but it's testing a slightly different scenario than intended. Consider adding an assertion after line 64 or resetting expectations to make the test behavior clearer:

# After cooldown period, counter is still at 3, so even one timeout would trigger restart
# Advance time past cooldown
mock_datetime.datetime.now.return_value = now + datetime.timedelta(minutes=31)

await health_manager.on_timeout()  # Counter now at 4, triggers restart
restart.assert_called_once()

This would technically trigger immediately with gathered function calls. But anything more than this is probably too much complexity.

potential follow up could be to keep track of the last timeout. if the timeout is more than say 15 seconds ago, it increases the increment. Could be a follow up PR though, I don't want to slow this one down as we are on a time crunch.

I think we're currently sending most commands serially, but yeah this kind of heuristic is hard. i was also considering if we could do it entirely in the mqtt session but hard when you can't correlate incoming and outgoing messages to know if something really did timeout.

Not sure if i get the timeout point you're making but interested in following up.