Follow the pages in order. Start with your machine, continue through the provider integrations you need, and finish with deployment.
Nothing here is a gate. Each service is optional except the database and Clerk. An unconfigured API integration answers 501 not_configured when reached, while an omitted PostHog token disables analytics at build time. You can skip Stripe and still have a running app with a checkout button that says what is missing.
SETUP.md at the repository root is the executable guide for a coding agent. The agent inventories each selected provider account, provisions through a CLI, API, MCP server, or authenticated browser, and writes values to the ignored environment files. You handle account login, MFA, consent, required approvals, and choices between plausible accounts or resources. The agent hands those steps to you as pnpm setup:wizard groups, so a secret goes from the dashboard to the environment file without passing through the agent.
These pages explain what the agent configures and provide the handoff path when a suitable tool is unavailable. Provider command surfaces change, so the agent checks current help or visible controls before it writes.
The full list of variables, with which app reads each one, is Environment variables.