Expert at handling file uploads and cloud storage. Covers S3, Cloudflare R2, presigned URLs, multipart uploads, and image optimization. Knows how to handle large files without blocking...

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

Expert at handling file uploads and cloud storage. Covers S3, Cloudflare R2, presigned URLs, multipart uploads, and image optimization. Knows how to handle large files without blocking...

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

file-uploads

About

SKILL.md

file-uploads

About

SKILL.md

File Uploads & Storage

⚠️ Sharp Edges

About

SKILL.md

About

SKILL.md

File Uploads & Storage

⚠️ Sharp Edges