Configuration

This skill describes a safe configuration pattern for backend services.

Core rule

Centralize configuration in one module and validate it at startup.

Avoid scattered access to environment variables throughout the codebase.

Pattern: typed config + validation

1. •Read environment variables in a single place.
2. •Validate and normalize them.
3. •Export a typed config object.

export const config = {
  env: process.env.NODE_ENV ?? "development",
  port: Number(process.env.PORT ?? "3000"),
};

If validation fails, fail fast at startup.

Related Skills

• •architecture-overview