nitro

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