# Vercel Functions Runtime

> Vercel Functions and Edge Runtime, including cron jobs and routing middleware. Use when building APIs, serverless workloads, or scheduled tasks on Vercel. Use when this capability is needed.

- Skill: `tomevault-io/vercel-functions-runtime` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/vercel-functions-runtime`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/vercel-functions-runtime/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/vercel-functions-runtime

---

# Vercel Functions and Runtime Skill

---
progressive_disclosure:
  entry_point:
    summary: "Vercel Functions and Edge Runtime: serverless APIs, edge execution, cron jobs, and routing middleware."
    when_to_use:
      - "When building API routes or serverless logic"
      - "When targeting the Edge Runtime"
      - "When scheduling tasks with cron jobs"
    quick_start:
      - "Create a function entry point"
      - "Choose the runtime (Node or Edge)"
      - "Configure cron schedules"
      - "Deploy and monitor"
  token_estimate:
    entry: 90-110
    full: 3600-4700
---

## Overview

Vercel Functions provide serverless execution for APIs and background tasks. The Edge Runtime enables low-latency execution closer to users.

## Vercel Functions

- Define serverless functions in the project structure.
- Use environment variables for configuration.
- Review logs for errors and performance.

## Edge Runtime

- Use the Edge Runtime for low-latency execution.
- Validate compatibility with the Edge runtime constraints.

## Cron Jobs

- Schedule jobs with cron definitions.
- Use cron for periodic maintenance tasks or sync jobs.

## Routing and Middleware

- Apply routing middleware for request handling.
- Use headers, rewrites, and redirects to control traffic.

## Complementary Skills

When using this skill, consider these related skills (if deployed):

- **vercel-deployments-builds**: Deployment workflow and release controls.
- **vercel-networking-domains**: Routing, headers, and edge caching.
- **vercel-observability**: Logs and tracing for function debugging.

*Note: Complementary skills are optional. This skill is fully functional without them.*

## Resources

**Vercel Docs**:
- Functions: https://vercel.com/docs/functions
- Edge Runtime: https://vercel.com/docs/functions/runtimes/edge
- Cron Jobs: https://vercel.com/docs/cron-jobs
- Routing Middleware: https://vercel.com/docs/routing-middleware

---
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<!-- tomevault:4.0:skill_md:2026-04-11 -->