@envmanifest/next

Next.js framework integration for envmanifest.

npm install @envmanifest/next

// src/env.ts
import { createEnv } from "@envmanifest/next";

export const env = createEnv({
  server: ["DATABASE_URL", "STRIPE_SECRET_KEY"] as const,
  client: ["NEXT_PUBLIC_APP_URL", "NEXT_PUBLIC_SUPABASE_ANON_KEY"] as const,
  optional: ["LOG_LEVEL"],
  project: "my-app",
});

Why this exists

Next.js bundles everything in client into the browser. If a non-public name slips into the client list, secrets leak. createEnv:

• Throws at module load if a client name does not start with NEXT_PUBLIC_.
• Throws if a server name (that is not NEXT_PUBLIC_*) is accessed on the client.
• Validates all required names are present (empty string counts as missing).

Combine with envmanifest generate-types to keep the lists in sync with manifest.yml.

License

MIT