Authentication integration guidance — Clerk (native Vercel Marketplace), Better Auth, Descope, and Auth0 setup for Next.js applications, plus Sign in with Vercel, Vercel Passport, and Vercel KMS. Covers server config, route handlers, proxy.ts auth patterns, sign-in/sign-up flows, and Marketplace provisioning.
Install
npx skills add vercel/vercel-plugin --skill authnpx skills add vercel/vercel-plugin --skill auth -a claude-code -gnpx skills add vercel/vercel-plugin --skill auth -a codex -ggemini skills install https://github.com/vercel/vercel-plugin.git --path skills/authgh skill install vercel/vercel-plugin authgit clone --depth 1 https://github.com/vercel/vercel-plugin /tmp/vercel__vercel-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/vercel__vercel-plugin/skills/auth ~/.claude/skills/auth # Claude Code
cp -R /tmp/vercel__vercel-plugin/skills/auth ~/.agents/skills/auth # Codex, Cursor, Gemini CLI, Copilot, OpenCode