file-uploadslisted

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. Use when: file upload, S3, R2, presigned URL, multipart.
odjaramillo/custom-rules · ★ 1 · Data & Documents · score 57

Install: claude install-skill odjaramillo/custom-rules

# 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 |