About
This skill provides specialized expertise in managing complex file upload workflows and cloud storage integration for modern applications. It handles everything from standard S3 and Cloudflare R2 setups to advanced implementation patterns like presigned URLs and multipart uploads for massive files. By emphasizing security-first practices such as magic byte validation, strict size limits, and filename sanitization, this skill ensures your application's file handling is both performant and resilient against common vulnerabilities like path traversal and MIME-type spoofing.
