tmux-mem-cpu-load is a lightweight system monitoring utility designed for the tmux status line. It gives terminal users a compact way to view memory usage, CPU usage, and system load without opening a separate monitoring program. The tool is especially useful for developers, server administrators, and power users who spend long sessions inside tmux. It displays used and available memory in a concise format that fits naturally in a terminal status bar. It also shows CPU usage as a percentage and can include a small text-based usage graph. Its main value is making basic system health visible at all times while staying simple, fast, and unobtrusive.