Validate and secure environment variables in Next.js applications on Vercel.
npx skills add https://github.com/alexejluft/brudi --skill managing-secrets-alexejluft
Please help me install this Agent Skill. Skill: managing-secrets Source: https://github.com/alexejluft/brudi/tree/main/skills/managing-secrets Command: npx skills add https://github.com/alexejluft/brudi --skill managing-secrets-alexejluft
This Skill prevents the accidental exposure of sensitive credentials like API keys and database passwords in Next.js applications, ensuring secure handling of environment variables across different deployment stages.
Use the managing-secrets skill to ensure the Supabase service role key is not exposed to the client.
High-intent search queries and answers about installing and using this skill.
To prevent exposing Supabase secrets in Next.js, avoid prefixing sensitive API keys with `NEXT_PUBLIC_` so they remain server-side only, and use runtime validation with Zod to verify required variables are present. Keep production keys out of preview environments to avoid accidental leakage.
Client-side environment variables in Next.js require the `NEXT_PUBLIC_` prefix and are exposed to the browser, while server-side variables are only accessible on the server. Scoping ensures sensitive credentials like database URLs and API keys do not leak to the client.
Validate environment variables at startup in Next.js by implementing runtime checks with Zod. This enforces that all critical variables are present and correctly formatted before the application fully initializes, preventing runtime errors caused by missing configuration.
You should not commit the `.env` file because it leads to the accidental exposure of sensitive credentials like API keys and database passwords. Secure handling of secrets requires storing them directly in the Vercel environment configuration instead of the repository.
No, using production Supabase keys in Vercel preview environments is a common mistake that risks accidental exposure. Secure key management requires separate, scoped credentials for different deployment stages to isolate preview deployments from production data.
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