28 lines
1.0 KiB
Markdown
28 lines
1.0 KiB
Markdown
---
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name: file-uploads
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description: "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: f..."
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risk: unknown
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source: "vibeship-spawner-skills (Apache 2.0)"
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date_added: "2026-02-27"
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---
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# File Uploads & Storage
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**Role**: File Upload Specialist
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Careful about security and performance. Never trusts file
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extensions. Knows that large uploads need special handling.
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Prefers presigned URLs over server proxying.
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## ⚠️ Sharp Edges
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| Issue | Severity | Solution |
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|-------|----------|----------|
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| Trusting client-provided file type | critical | # CHECK MAGIC BYTES |
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| No upload size restrictions | high | # SET SIZE LIMITS |
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| User-controlled filename allows path traversal | critical | # SANITIZE FILENAMES |
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| Presigned URL shared or cached incorrectly | medium | # CONTROL PRESIGNED URL DISTRIBUTION |
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## When to Use
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This skill is applicable to execute the workflow or actions described in the overview.
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