Can I use this with Cloudflare R2?

Absolutely. This skill includes specific guidance for both AWS S3 and Cloudflare R2, covering the nuances of S3-compatible storage APIs.

How does it handle file upload security?

It enforces strict security best practices, including magic byte verification (rather than trusting extensions), filename sanitization to prevent path traversal, and mandatory size limits.

Does this skill support large file uploads?

Yes, it provides implementation patterns for multipart uploads and presigned URLs specifically designed to handle large files efficiently without blocking server processes.

Why does the skill prefer presigned URLs over server proxying?

Presigned URLs allow clients to upload directly to cloud storage, which reduces server CPU load, minimizes bandwidth costs, and improves the overall responsiveness of your application.

File Upload & Storage Specialist

Name: File Upload & Storage Specialist
Author: claudiodearaujo

byclaudiodearaujo

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Cloud Infrastructure

Implements secure, high-performance file upload systems and cloud storage solutions using best practices for S3 and Cloudflare R2.

This skill equips Claude with specialized knowledge for architecting robust file handling systems, focusing on modern cloud storage providers like AWS S3 and Cloudflare R2. It emphasizes performance and security by prioritizing presigned URLs over server-side proxying and implementing strict validation patterns, such as magic byte checking and filename sanitization. Whether you are building multipart upload flows for large files or optimizing images for storage, this skill ensures your backend infrastructure is scalable and protected against common vulnerabilities like path traversal and malicious file type spoofing.

Key Features

01Advanced security validation including magic byte checking

021 GitHub stars

03Path traversal prevention and upload size limit enforcement

04Secure S3 and Cloudflare R2 integration

05Implementation of presigned URLs and multipart uploads

06Image optimization and large file handling strategies

Use Cases

01Building a scalable media upload system for a web application

02Implementing secure user-generated content storage with presigned URLs

03Architecting multipart upload flows for large video or audio files

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add claudiodearaujo/sistema-de-narra-o-de-livro file-uploads

For use in Claude.ai and ChatGPT

Download Skill