Vercel Agent Installs Private npm Packages

Vercel Agent now installs private dependencies from npm and custom registries using shared environment variables. It supports npm, pnpm, and classic Yarn, authenticating as in Vercel builds. Teams add NPM_TOKEN for npmjs.org or NPM_RC for custom registries. Only team-shared variables work, not project-scoped ones, and credentials stay outside the sandbox so the agent cannot read them.