https://shipreadyai.dev/learn/findings/o2-x-content-type-options-ok

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# X-Content-Type-Options is set

Browsers will not guess a file type that differs from the one you declared.

## Why AI-built apps get this

Response headers are written by nobody. Your framework does not add them, your builder does not add them, and your host adds one or two at most. They are the clearest example of a gap that no tool closes on your behalf, which is why almost every app built by a prompt ships without them.

## Evidence line

GET https://example.com returned no strict-transport-security header

## The fix

Nothing to change here.

## Prompt

Keep the X-Content-Type-Options header set to nosniff.