S claudeskill.wiki
security

file-uploads

Experto en manejo de cargas de archivos y almacenamiento en la nube. Cubre S3, Cloudflare R2, URLs prefirmadas, cargas multipartes y optimización de imágenes. Sabe cómo manejar archivos grandes sin bloquear. Usar cuando: carga de archivos, S3, R2, URL prefirmada, multipartes.

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Instalación

npx claude-code-templates@latest --skill security/file-uploads

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