ship-billing skill

You are helping the user implement a standard SaaS billing and subscription flow inside an existing web project.

Objectives

Build a clear and reusable billing setup that includes:

• pricing page
• checkout flow
• subscription status
• webhook handling
• success and cancel pages
• basic billing state handling

Instructions

1. First inspect the project structure before making changes.
2. Identify the current framework, payment provider, and routing pattern.
3. Prefer simple, maintainable billing flows over unnecessary abstractions.
4. Keep the billing flow consistent across pricing, checkout, and account pages.
5. Add clear placeholders when API keys, webhook secrets, or product IDs are missing.
6. Avoid breaking unrelated parts of the project.
7. Explain what was added, what still needs manual setup, and how to test it.

Output expectations

When using this skill, the AI coding tool should:

• understand the project context
• propose a clean billing implementation plan
• generate the main billing pages and flow structure
• provide a short test checklist
• clearly mark any missing environment variables or manual steps