Tired of "wasting" Claude's 5-hour usage windows? I built a tiny macOS tool that auto-primes them

Claude Pro / Max meters usage in 5-hour rolling windows. The window starts the first time you send a message and resets 5 hours later. If you don't send anything during a window, that quota is gone — there's no "banking" unused time.

Three times a day I'd realize I'd forgotten to fire up Claude until hours into a fresh window, effectively shrinking my daily budget. So I wrote a small macOS tool to do it for me.

What it does

Three times a day (06:30 / 11:30 / 16:30 by default) it:

1. Spawns claude in a real pty

2. Types "Hey!"

3. Waits for the response to settle

4. Sends Ctrl+C twice and exits

The full 5-hour window is opened the moment it resets, so the daily quota is always fully claimable.

Stack

- Pure shell + Tcl expect + launchd — all built into macOS

- No daemons, no deps, no API keys, ~80 lines of code

- Works alongside codex too if you have both subscriptions

- Logs to ~/Library/Caches/agent-maxprime/, last 10 runs kept

Install

git clone https://github.com/bunyodrafikov/agent-maxprime
cd agent-maxprime
./scripts/install.sh

(One-time prep: run claude once inside the repo dir and accept the "trust this folder?" prompt, otherwise the scheduled runs stall there.)

I am very much open to feedback. Please let me know if you get have any opinion on this!