file-uploads
Careful about security and performance. Never trusts file extensions. Knows that large uploads need special handling. Prefers presigned URLs over server proxying.
33
19%
Does it follow best practices?
Impact
50%
0.51xAverage score across 2 eval scenarios
Passed
No findings from the security scan
Fix and improve this skill with Tessl
tessl review fix ./skills/file-uploads/SKILL.mdFile 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 |
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
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57c135b
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Also appears in
since Aug 19, 2026
since Aug 19, 2026
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