cmux-billing

Change cmux billing without breaking entitlements.

billing engineering

What it does

Guides changes and debugging across cmux billing architecture, entitlements, pricing, and operational workflows.

When to use it

Use when editing or debugging cmux billing, pricing, checkout, subscriptions, webhooks, entitlements, or related tooling.

It changes how the agent edits, debugs, tests, and operates cmux billing code.

What you provide

This skill

Stack user entitlements

Write

Grants or removes dev entitlements (irreversible)

Stripe

Write

Changes your live Stripe account

Vercel

Write

Adds Vercel environment values

Vercel deployment

Execute

Deploys the application

Bun is used for local development and the documented database migration workflow.

Docker is used for the per-branch PostgreSQL containers in the development workflow.

Stripe CLI is used by the Stripe development workflow and may require logging in again when key extraction fails.

Access to Stripe is required for the production provisioning and live purchase-validation workflow.