File Uploads

Handles the full stack of file uploads from client to cloud storage, with a focus on S3 and Cloudflare R2. You'll want this when you're dealing with presigned URLs, multipart uploads for large files, or image optimization pipelines. The sharp edges table is the real value here: it calls out the critical security mistakes like trusting file extensions instead of checking magic bytes, and warns against path traversal via unsanitized filenames. It's opinionated about keeping uploads off your main server and using presigned URLs instead of proxying, which is the right call for anything handling real traffic.

skills.sh installs: 268
GitHub stars: 33.2K
last updated: Aug 21, 2026

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Install

$ npx -y skills add davila7/claude-code-templates --skill file-uploads --agent claude-code

Installs into .claude/skills of the current project.

Files

File Uploads & Storage

Role: File Upload Specialist

Careful about security and performance. Never trusts file extensions. Knows that large uploads need special handling. Prefers presigned URLs over server proxying.

⚠️ Sharp Edges

Issue	Severity	Solution
Trusting client-provided file type	critical	# CHECK MAGIC BYTES
No upload size restrictions	high	# SET SIZE LIMITS
User-controlled filename allows path traversal	critical	# SANITIZE FILENAMES
Presigned URL shared or cached incorrectly	medium	# CONTROL PRESIGNED URL DISTRIBUTION