Why File Type Detection Is More Than a Metadata Problem

What Magika teaches us about names, evidence, boundaries, and trustworthy file intelligence Author note: This article is written for engineers building upload flows, storage systems, CI pipelines, security tooling, and AI products that need to reason about real files instead of just trusting filenames. Summary When a system accepts a file, one of the first questions sounds almost trivial: What is this thing? But many production systems still answer that question with a weak proxy: the filename e