What problem does it solve? Managing environment variables across Vercel projects is error-prone: secrets get committed to git, vercel env pull silently overwrites custom variables, local OIDC tokens expire mid-session, and standalone scripts fail because they don't auto-load .env.local. This Skill provides expert guidance to avoid these pitfalls. ## Core Features & Use Cases - .env File Hierarchy Guidance: Explains Next.js load order, which files are git-tracked, and where secrets belong. - vercel env CLI Workflows: Covers pull, add, ls, and rm commands, including bootstrap flows for fresh clones and re-pulling after secret changes. - OIDC Token Lifecycle: Explains how VERCEL_OIDC_TOKEN works on Vercel versus locally, and how to troubleshoot expiry and auth errors. - Use Case: You clone a project on a new machine and need it running fast. Follow the bootstrap sequence: vercel link, vercel env pull .env.local --yes, then verify all keys from .env.example exist. ## Quick Start Ask the assistant to pull the Vercel environment variables for your project into .env.local and verify that every key listed in .env.example is present.