How do I install the Nitro skill?

Run npx skillmds add antfu/nitro in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Nitro safe to use?

SkillMD's automated safety review verdict for this skill is PASS. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Nitro?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Nitro free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Anthony Fu (@antfu) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Nitro by antfu — Agent Skill

Name: Nitro
Rating: 4.2 (5 reviews)
Author: Anthony Fu

File contents

The skill is based on Nitro v3 (beta), generated at 2026-06-22.

Nitro is a framework-agnostic, deployment-agnostic server toolkit powered by H3 v2, unstorage, and Vite/Rolldown/Rollup. It powers Nuxt and works standalone. From one codebase it builds optimized output for Node.js, Bun, Deno, Cloudflare, Vercel, Netlify, and more.

Key capabilities:

Filesystem routing with H3 v2 event handlers, dynamic params, and method suffixes.
Route rules for declarative caching, headers, redirects, proxying, and auth.
Caching layer (cached handlers/functions, SWR) on top of unstorage KV.
Runtime config overridable via NITRO_* env vars.
Tasks (on-demand + scheduled/cron), WebSockets/SSE, a SQL database layer, and OpenAPI auto-docs.
Plugins & lifecycle hooks, custom renderer/server entry, and portable deployment presets.

Nitro v3 renamed the package nitropack → nitro and adopts H3 v2 (web-standard Request/Response). If unsure about v2-vs-v3 APIs, read advanced-migration first.

Core

Topic	Description	Reference
Routing	File-based routes, `defineHandler`, params, middleware, route rules, errors	core-routing
Configuration	`nitro.config.ts`, `defineConfig`, key options, runtime config	core-configuration
Storage	unstorage KV, mount points, drivers, dynamic mounts	core-storage
Cache	`defineCachedHandler`, `defineCachedFunction`, SWR, invalidation	core-cache
Assets	Public assets, compression, server assets via storage	core-assets
Rendering	Renderer (HTML/SSR), server entry, framework integration	core-rendering

Features

Topic	Description	Reference
Plugins & Hooks	`definePlugin`, runtime lifecycle hooks, error capture	features-plugins
Tasks	On-demand & scheduled (cron) tasks, `runTask`	features-tasks
WebSocket & SSE	`defineWebSocketHandler`, pub/sub, namespaces, event streams	features-websocket
Database	Built-in SQL layer via db0, `useDatabase`, connectors	features-database
OpenAPI	Auto spec from `defineRouteMeta`, Scalar/Swagger UIs	features-openapi

Advanced / Deployment

Topic	Description	Reference
Deployment Presets	Runtimes & providers, compatibility dates, platform integration	deploy-presets
v2 → v3 Migration	Package rename, `nitro/*` imports, H3 v2 API, preset changes	advanced-migration

---name: nitrodescription: Build and deploy web servers anywhere using Nitro's filesystem routing, caching, tasks, WebSockets, and deployment presets for Node.js, Bun, Deno, Cloudflare, Vercel, and more.---> The skill is based on Nitro v3 (beta), generated at 2026-06-22.Nitro is a framework-agnostic, deployment-agnostic server toolkit powered by [H3](https://h3.dev) v2, [unstorage](https://unstorage.unjs.io), and Vite/Rolldown/Rollup. It powers Nuxt and works standalone. From one codebase it builds optimized output for Node.js, Bun, Deno, Cloudflare, Vercel, Netlify, and more.Key capabilities:- **Filesystem routing** with H3 v2 event handlers, dynamic params, and method suffixes.- **Route rules** for declarative caching, headers, redirects, proxying, and auth.- **Caching** layer (cached handlers/functions, SWR) on top of **unstorage** KV.- **Runtime config** overridable via `NITRO_*` env vars.- **Tasks** (on-demand + scheduled/cron), **WebSockets**/SSE, a SQL **database** layer, and **OpenAPI** auto-docs.- **Plugins & lifecycle hooks**, custom **renderer**/**server entry**, and portable **deployment presets**.> Nitro v3 renamed the package `nitropack` → `nitro` and adopts H3 v2 (web-standard `Request`/`Response`). If unsure about v2-vs-v3 APIs, read [advanced-migration](references/advanced-migration.md) first.## Core| Topic | Description | Reference ||-------|-------------|-----------|| Routing | File-based routes, `defineHandler`, params, middleware, route rules, errors | [core-routing](references/core-routing.md) || Configuration | `nitro.config.ts`, `defineConfig`, key options, runtime config | [core-configuration](references/core-configuration.md) || Storage | unstorage KV, mount points, drivers, dynamic mounts | [core-storage](references/core-storage.md) || Cache | `defineCachedHandler`, `defineCachedFunction`, SWR, invalidation | [core-cache](references/core-cache.md) || Assets | Public assets, compression, server assets via storage | [core-assets](references/core-assets.md) || Rendering | Renderer (HTML/SSR), server entry, framework integration | [core-rendering](references/core-rendering.md) |## Features| Topic | Description | Reference ||-------|-------------|-----------|| Plugins & Hooks | `definePlugin`, runtime lifecycle hooks, error capture | [features-plugins](references/features-plugins.md) || Tasks | On-demand & scheduled (cron) tasks, `runTask` | [features-tasks](references/features-tasks.md) || WebSocket & SSE | `defineWebSocketHandler`, pub/sub, namespaces, event streams | [features-websocket](references/features-websocket.md) || Database | Built-in SQL layer via db0, `useDatabase`, connectors | [features-database](references/features-database.md) || OpenAPI | Auto spec from `defineRouteMeta`, Scalar/Swagger UIs | [features-openapi](references/features-openapi.md) |## Advanced / Deployment| Topic | Description | Reference ||-------|-------------|-----------|| Deployment Presets | Runtimes & providers, compatibility dates, platform integration | [deploy-presets](references/deploy-presets.md) || v2 → v3 Migration | Package rename, `nitro/*` imports, H3 v2 API, preset changes | [advanced-migration](references/advanced-migration.md) |

Frequently asked questions