skills/file-uploads/SKILL.md
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.
npx skillsauth add pcruvinel/antig file-uploadsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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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.
| 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 |
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