Vercel Cli

This one's for anyone deploying to Vercel from the terminal instead of git push. It covers the full CLI surface: deployments, environment variables, logs, metrics, domains, and the stuff that trips people up like project linking in monorepos. The guidance is thorough on the `.vercel/project.json` versus `.vercel/repo.json` distinction, which matters more than you'd think when commands start failing. It routes you to specific references for CI automation, debugging preview deployments with `vercel curl`, and fallback patterns using `vercel api` when the CLI doesn't expose something directly. Solid if you're scripting deploys, managing multiple projects, or just prefer living in the shell.