X_SPAWN_TIMED_OUT

a command a gate script ran did not finish within its deadline and was killed

run() in scripts/lib/run.ts races the whole call, the child's pipes included, against timeoutMs (default DEFAULT_RUN_TIMEOUT_MS, 2 minutes). Either the command hung, or it exited and left a process holding its output open — git's background maintenance, a pager, a credential helper — and a reader waiting for EOF waits as long as that process lives. Reported in the run's result (timedOut: true), never thrown: the caller decides what an unanswered command means

run(command, { cwd, timeoutMs: LONG_RUN_TIMEOUT_MS }) in the calling script, when the command legitimately runs longer; when it hung, ps -eo pid,ppid,etime,args shows what still holds its output