uploadthing
Handle file uploads in TypeScript apps with UploadThing. Use when a user asks to implement file uploads, handle image uploads in Next.js, add drag and drop file upload, or integrate S3-backed file storage without managing infrastructure.
Best use case
uploadthing is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Handle file uploads in TypeScript apps with UploadThing. Use when a user asks to implement file uploads, handle image uploads in Next.js, add drag and drop file upload, or integrate S3-backed file storage without managing infrastructure.
Teams using uploadthing should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/uploadthing/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How uploadthing Compares
| Feature / Agent | uploadthing | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Handle file uploads in TypeScript apps with UploadThing. Use when a user asks to implement file uploads, handle image uploads in Next.js, add drag and drop file upload, or integrate S3-backed file storage without managing infrastructure.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# UploadThing
## Overview
UploadThing is a file upload service for TypeScript apps. Define upload routes on the server (with auth, file type, and size validation), get pre-built React components for the frontend. Files go to S3-compatible storage. No infrastructure to manage — just define what's allowed and upload.
## Instructions
### Step 1: Setup
```bash
npm install uploadthing @uploadthing/react
```
### Step 2: Server Routes
```typescript
// server/uploadthing.ts — Define upload routes
import { createUploadthing, type FileRouter } from 'uploadthing/server'
import { getSession } from '@/lib/auth'
const f = createUploadthing()
export const uploadRouter = {
// Avatar upload: max 2MB image, authenticated users only
avatarUploader: f({ image: { maxFileSize: '2MB', maxFileCount: 1 } })
.middleware(async ({ req }) => {
const session = await getSession(req)
if (!session) throw new Error('Not authenticated')
return { userId: session.user.id }
})
.onUploadComplete(async ({ metadata, file }) => {
console.log(`Avatar uploaded for user ${metadata.userId}: ${file.url}`)
await db.user.update({
where: { id: metadata.userId },
data: { avatarUrl: file.url },
})
return { url: file.url }
}),
// Document upload: max 10MB, multiple files
documentUploader: f({
pdf: { maxFileSize: '10MB', maxFileCount: 5 },
'application/msword': { maxFileSize: '10MB', maxFileCount: 5 },
})
.middleware(async ({ req }) => {
const session = await getSession(req)
if (!session) throw new Error('Not authenticated')
return { userId: session.user.id }
})
.onUploadComplete(async ({ metadata, file }) => {
await db.document.create({
data: {
name: file.name,
url: file.url,
size: file.size,
userId: metadata.userId,
},
})
}),
} satisfies FileRouter
export type OurFileRouter = typeof uploadRouter
```
### Step 3: React Components
```tsx
// components/AvatarUpload.tsx — Pre-built upload button
import { UploadButton, UploadDropzone } from '@uploadthing/react'
import type { OurFileRouter } from '@/server/uploadthing'
// Simple button
export function AvatarUpload() {
return (
<UploadButton<OurFileRouter, 'avatarUploader'>
endpoint="avatarUploader"
onClientUploadComplete={(res) => {
console.log('Uploaded:', res[0].url)
}}
onUploadError={(error) => {
console.error('Upload failed:', error.message)
}}
/>
)
}
// Drag and drop zone
export function DocumentUpload() {
return (
<UploadDropzone<OurFileRouter, 'documentUploader'>
endpoint="documentUploader"
onClientUploadComplete={(res) => {
console.log(`${res.length} files uploaded`)
}}
/>
)
}
```
## Guidelines
- Free tier: 2GB storage, 2GB transfer/month — enough for MVPs.
- UploadThing handles presigned URLs, multipart upload, and CDN delivery.
- Middleware runs on every upload — use for auth, rate limiting, and validation.
- For self-hosted alternative, use S3 + presigned URLs directly (more work, no vendor lock-in).Related Skills
zustand
You are an expert in Zustand, the small, fast, and scalable state management library for React. You help developers manage global state without boilerplate using Zustand's hook-based stores, selectors for performance, middleware (persist, devtools, immer), computed values, and async actions — replacing Redux complexity with a simple, un-opinionated API in under 1KB.
zoho
Integrate and automate Zoho products. Use when a user asks to work with Zoho CRM, Zoho Books, Zoho Desk, Zoho Projects, Zoho Mail, or Zoho Creator, build custom integrations via Zoho APIs, automate workflows with Deluge scripting, sync data between Zoho apps and external systems, manage leads and deals, automate invoicing, build custom Zoho Creator apps, set up webhooks, or manage Zoho organization settings. Covers Zoho CRM, Books, Desk, Projects, Creator, and cross-product integrations.
zod
You are an expert in Zod, the TypeScript-first schema declaration and validation library. You help developers define schemas that validate data at runtime AND infer TypeScript types at compile time — eliminating the need to write types and validators separately. Used for API input validation, form validation, environment variables, config files, and any data boundary.
zipkin
Deploy and configure Zipkin for distributed tracing and request flow visualization. Use when a user needs to set up trace collection, instrument Java/Spring or other services with Zipkin, analyze service dependencies, or configure storage backends for trace data.
zig
Expert guidance for Zig, the systems programming language focused on performance, safety, and readability. Helps developers write high-performance code with compile-time evaluation, seamless C interop, no hidden control flow, and no garbage collector. Zig is used for game engines, operating systems, networking, and as a C/C++ replacement.
zed
Expert guidance for Zed, the high-performance code editor built in Rust with native collaboration, AI integration, and GPU-accelerated rendering. Helps developers configure Zed, create custom extensions, set up collaborative editing sessions, and integrate AI assistants for productive coding.
zeabur
Expert guidance for Zeabur, the cloud deployment platform that auto-detects frameworks, builds and deploys applications with zero configuration, and provides managed services like databases and message queues. Helps developers deploy full-stack applications with automatic scaling and one-click marketplace services.
zapier
Automate workflows between apps with Zapier. Use when a user asks to connect apps without code, automate repetitive tasks, sync data between services, or build no-code integrations between SaaS tools.
zabbix
Configure Zabbix for enterprise infrastructure monitoring with templates, triggers, discovery rules, and dashboards. Use when a user needs to set up Zabbix server, configure host monitoring, create custom templates, define trigger expressions, or automate host discovery and registration.
yup
Validate data with Yup schemas. Use when adding form validation, defining API request schemas, validating configuration, or building type-safe validation pipelines in JavaScript/TypeScript.
yt-dlp
Download video and audio from YouTube and other platforms with yt-dlp. Use when a user asks to download YouTube videos, extract audio from videos, download playlists, get subtitles, download specific formats or qualities, batch download, archive channels, extract metadata, embed thumbnails, download from social media platforms (Twitter, Instagram, TikTok), or build media ingestion pipelines. Covers format selection, audio extraction, playlists, subtitles, metadata, and automation.
youtube-transcription
Transcribe YouTube videos to text using OpenAI Whisper and yt-dlp. Use when the user wants to get a transcript from a YouTube video, generate subtitles, convert video speech to text, create SRT/VTT captions, or extract spoken content from YouTube URLs.