Keep environments separate and configure via env, not code

Keep environments separate and configure via env, not code | BeforeMerge Rules | BeforeMerge

Why this matters

Following twelve-factor config, environment-specific values (URLs, credentials, flags) belong in the environment, not in if (env === 'prod') branches. Separate, identically-built environments make behavior predictable and prevent staging code from touching prod data.

Bad

const db = env === "prod" ? "prod-db" : "dev-db";  // branching on env in code

Good

const db = process.env.DATABASE_URL;  // same code, value per environment

Why This Matters

Related Rules

Catch this automatically on every PR

Why this matters