gate is not responding

app/scripts/sandbox/process_checker.gd

@@ -0,0 +1,34 @@
+extends Node
+
+@export var gate_events: GateEvents
+@export var command_events: CommandEvents
+
+# Timeout interval for child process responsiveness
+const BOOTUP_INTERVAL = 30
+const HEARTBEAT_INTERVAL = 5
+const WAIT_INTERVAL = 30
+
+var timer: Timer
+
+
+func _ready() -> void:
+	timer = Timer.new()
+	add_child(timer)
+	timer.timeout.connect(on_timeout)
+	
+	gate_events.gate_entered.connect(start_bootup_timer)
+	command_events.heartbeat.connect(restart_heartbeat_timer)
+
+
+func start_bootup_timer() -> void:
+	timer.start(BOOTUP_INTERVAL)
+
+
+func restart_heartbeat_timer() -> void:
+	timer.start(HEARTBEAT_INTERVAL)
+
+
+func on_timeout() -> void:
+	Debug.logerr("Gate is not responding")
+	gate_events.not_responding_emit()
+	timer.start(WAIT_INTERVAL)