saltybot_node_watchdog 0.1.0 Node watchdog monitor for SaltyBot critical systems. Monitors heartbeats from balance, motor driver, emergency, and docking nodes. Publishes alerts on heartbeat loss >1s. Implements safety fallback: zeros cmd_vel if motor driver lost >2s. Runs at 20Hz. sl-controls MIT rclpy geometry_msgs std_msgs ament_python ament_copyright ament_flake8 ament_pep257 python3-pytest ament_python