claude-warmup: start your Claude 5-hour window before you sit down

If you use Claude Code, you know the 5-hour usage window: it starts with your first message. This small tool checks every few minutes and, only when no window is active, sends a one-word "hi" to Haiku through the official claude CLI. So the window is already running (and resets sooner, mid-workday) by the time you start.

- Zero-dependency Node, small enough to read in one sitting
- Reads usage with claude -p /usage, a local command that costs 0 tokens, and also shows your session and weekly usage with reset times
- Never touches your credentials; the official CLI handles auth
- Runs on macOS (launchd), Linux (systemd or cron) and Windows (Task Scheduler)

To be clear: it does not raise your limit. It only shifts when the window resets so it lines up with your day.

Source: https://github.com/jungtaejoon/claude-warmup

I built it with Claude Code. Useful gem or pointless slop? Your verdict is welcome.