Claude Max Usage Calculator

Track your Claude Max subscription usage based on the reverse-engineered credits system from she-llac.com/claude-limits.

When to use

When the user asks about Claude usage, credits, subscription consumption, rate limits, or wants to know how much budget is left.

Setup (first time)

Ask the user for:

1. Weekly reset time — visible on claude.ai Settings > Usage (e.g. "Resets Mon 2:00 PM")
2. Plan — pro ($20), 5x ($100), or 20x ($200). Default: 5x

Save it so they never have to repeat:

python3 {SKILL_DIR}/scripts/claude-usage.py "2026-02-09 14:00" --plan 5x --save