How to forecast your AI coding usage before you run out
If you code with Claude Code or Codex, your real constraint isn't tokens, it's running out mid-task. Agentic coding is bursty: one "refactor this and run the tests" can spend a big slice of your window in minutes. A usage-limit tracker exists to make sure you see that coming.
Why agentic coding burns limits fast
Unlike chatting, an agent reads files, runs tools, and iterates, each step costs usage. Limits are rolling, so the danger isn't a fixed daily quota, it's your pace over the last few hours and across the week. You can sail through a session and still run dry mid-week, usually at the worst moment.
What a good tracker should do
- Read your live limits for each provider (the 5-hour and weekly windows), not a guess.
- Forecast forward. A current percentage doesn't answer the real question: "at my pace, will I make it to the reset?" The useful tool projects your burn forward.
- Learn your pattern. Typical daily volume and when you work matter; a flat extrapolation over-reacts to a quiet hour or a single spike.
- Stay local and private. Your usage data shouldn't have to leave your machine for a meter to work.
- Cover every tool you use in one place, and tell you which one is most at risk.
Forecasting beats a raw percentage
"42% left" tells you nothing about whether you'll finish the week. Projecting your recent usage to the reset does: if the line crosses your limit before the window resets, you know now, and can ease off, switch to a lighter model, or finish the critical part first.
In practice
A raw meter shows "42% left" and leaves you to guess. A forecasting tracker takes your recent burn and your typical working hours, projects the line to the reset, and says plainly whether you will make it. If it crosses early, you ease off or switch to a lighter model now, not after a run has already stalled.
ReserveGauge
ReserveGauge is a native macOS menu-bar tracker for Claude Code and Codex. It reads your live limits on your Mac, forecasts your week from your real history, and warns you the moment you're on track to run out early. Your usage history stays on your Mac; provider names, allowance values and usage history are not sent to ReserveGauge.