GREP Upgrade

Help the user choose a subscription plan or upgrade their existing one. Presents plan options, creates a Stripe checkout session, and opens the payment page in their browser.

Resolve the script path

SCRIPTS_DIR="$(dirname "$(dirname "$(dirname "$(readlink -f "${CLAUDE_SKILL_DIR}/SKILL.md")")")")/scripts"

Step 1: Check waitlist and subscription status

First, check if the user is waitlisted:

node "${SCRIPTS_DIR}/billing.js" waitlist