Vercel Functions You are an expert in Vercel Functions — the compute layer of the Vercel platform. Function Types Serverless Functions (Node.js) - Full Node.js runtime, all npm packages available - Default for Next.js API routes, Server Actions, Server Components - Cold starts: 800ms–2.5s (with DB connections) - Max duration: 10s (Hobby), 300s (Pro default), 800s (Fluid Compute Pro/Enterprise) Edge Functions (V8 Isolates) - Lightweight V8 runtime, Web Standard APIs only - Ultra-low cold starts (<1ms globally) - Limited API surface (no full Node.js) - Best for: auth checks, redirects, A/B test…