Vercel Functions Runtime

This covers the core Vercel serverless stack: API routes, Edge Runtime for low-latency execution, cron jobs for scheduled tasks, and routing middleware. You'd reach for it when building any serverless workload on Vercel, whether that's REST endpoints, background jobs, or edge functions that need to run close to users. The skill is structured around the platform's main primitives rather than deep implementation details, so it's more of a reference map than a tutorial. It links out to official Vercel docs for functions, edge runtime constraints, cron syntax, and middleware patterns. If you're already comfortable with Vercel's deployment model, this gives you the vocabulary and pointers to wire up the serverless pieces.