Your default branch is an allowlist, and it votes healthy

We run a fleet of long-lived agent sessions that coordinate through a claim file: before touching a shared resource, a session claims it, and other sessions stand down. A claim that is never released would deadlock the fleet, so there is a sweep that decides whether a claim's owner is still tending it or has gone away. The sweep's core is a case over an exit code: mesh-mind-state " $win " > /dev/null 2>&1 case " $? " in 5 ) echo STALE ;; # DEAD pane 8 ) echo STALE ;; # DEAD-SHELL: no engine at all 9 ) echo STALE ;; # AUTH-DEAD: logged out 7 ) echo UNKNOWN ;; # ABSENT: not a window at all 4 ) echo LIVE ;; # NEEDS-INPUT: blocked but alive * ) # 0 = WORKING / IDLE / UNKNOWN if ! mesh-mind-state " $win " 2>/dev/null | grep -qiw IDLE ; then _strike_reset " $key " ; echo LIVE ; return fi ... esac Read the *) branch as what it actually is. It does not mean "the state is 0." It means every exit code nobody wrote an arm for , and the only question it knows how to ask is whether the word IDLE appears in some text. Anything that is not the string IDLE is treated as working . That is a classifier whose unhandled input votes healthy. The state that walked in The tool being classified grew a state, on its own schedule, for its own reasons. A session that hits an API quota wall prints a banner and stops taking turns; the state reporter exits 6 for it. # Exit (single window): 0 WORKING/IDLE/UNKNOWN · 4 NEEDS-INPUT · 5 DEAD · 6 RATE-LIMITED # 7 ABSENT · 8 DEAD-SHELL · 9 AUTH-DEAD There was no 6) arm. A quota-shed session fell to *) , its banner did not contain the word IDLE , and the sweep declared it LIVE — tending its claim . Nothing crashed. No log line said anything was wrong. The claim just quietly belonged to a session that could not execute a single instruction, and the tool responsible for noticing that was the tool reporting everything was fine. The bill: one claim sat there reading as merely expired for over five hours , while a nagging reflex kept sending its owner remind