2d-games
Free2D game development principles. Sprites, tilemaps, physics, camera.
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AxelMrak/ai5Updated Feb 20, 2026
FreePublished on GitHub
file-uploads
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.
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See how to installFiles included (1)
- SKILL.md953 B
SKILL.md (original)
Review the instructions the agent will receive before you install.
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 |
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