The worst moment in a coding session is hitting a rate limit mid-task.
You're deep in a refactor. Claude Code stops. Or Codex resets. And you spend the next 20 minutes switching tools, losing context, or just waiting. The "Codex Resets" thread on Hacker News got 270 points and 175 comments. The pain is widespread.
The problem isn't the limit — it's that you don't know how close you are until you hit it.
I built
npm: for testing AI agent behavior, and AICostTracker for tracking what you're spending on AI APIs.
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