Backend File Storage

Purpose

Design secure file storage architecture with upload flows, CDN delivery, and processing.

Agent Protocol

Trigger

Exact user phrases: "file upload", "file storage", "S3", "object storage", "Blob storage", "CDN", "signed URL", "file serving", "image upload", "file management", "static assets", "presigned URL", "S3 bucket", "cloud storage", "file processing".

Input Context

Before activating, verify:

• File types accepted and maximum file sizes
• Upload frequency and expected concurrency
• Access patterns (frequently accessed, archival, private)
• CDN requirements (global distribution, cache TTL)
• Processing pipeline (thumbnails, format conversion, virus scan)